U.S. Department of the Interior

U.S. Geological Survey

USGS Afghanistan Project Product Number 179

Data Series 529

Prepared under the auspices of the U.S. Task Force for Business and Stability Operations

Streamflow Characteristics at Streamgages in 

Northern Afghanistan and Selected Locations
Cover. Photograph showing the Balkhab River looking upstream at Sari Puhl in northern Afghanistan. 

(Photograph by Thomas J. Mack, U.S. Geological Survey)
 

Prepared under the auspices of the U.S. Task Force for Business and Stability Operations

Streamflow Characteristics at Streamgages in 

Northern Afghanistan and Selected Locations

By Scott A. Olson and Tara Williams-Sether

Data Series 529

U.S. Department of the Interior

U.S. Geological Survey

USGS Afghanistan Project Product Number 179
ii

U.S. Department of the Interior

KEN SALAZAR, Secretary

U.S. Geological Survey

Marcia K. McNutt, Director

U.S. Geological Survey, Reston, Virginia: 2010

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Suggested citation:

Olson, S.A., and Williams-Sether, T., 2010, Streamflow characteristics at streamgages in northern Afghanistan and 

selected locations: U.S. Geological Survey Data Series 529, 512 p., at http://pubs.usgs.gov/ds/529/.

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copyright owners to reproduce any copyrighted material contained within this report.
iii

Contents

Abstract ......................................................................................................................................................................... 1

Introduction.................................................................................................................................................................... 1

History of the Streamgaging Program in Afghanistan.................................................................................................... 8

Explanation of Streamgage Summaries ........................................................................................................................ 8

Station Description..................................................................................................................................................... 8

Statistics of Monthly and Annual Mean Discharges ................................................................................................... 9

Monthly and Annual Flow Duration ...........................................................................................................................10

Probability of Occurrence of High or Low Discharges...............................................................................................10

Annual Peak Discharges...........................................................................................................................................11

Monthly and Annual Mean Discharges......................................................................................................................11

Data Considerations .................................................................................................................................................12

Selected References ....................................................................................................................................................12

Streamflow Statistics ....................................................................................................................................................14

1-0.000-1M Kabul River at Dakah............................................................................................................................15

1-0.000-4S Kabul River near Daronta......................................................................................................................21

1-0.000-5W Kabul River at Naghlu ..........................................................................................................................27

1-0.000-6M Kabul River at Tang-i-Gharu.................................................................................................................34

1-2.R00-7T Hazarnaw River at Sabay .....................................................................................................................41

1-4.1R0-1A Pech River at Chaghasarai...................................................................................................................47

1-4.2R0-1A Landaisin River near Gawardesh..........................................................................................................54

1-4.L00-1A Konar River at Pul-i-Kama.....................................................................................................................60

1-4.L00-2T Konar River near Konari ........................................................................................................................66

1-4.L00-3A Konar River at Nawabad .......................................................................................................................72

1-4.L00-4T Konar River near Asmar........................................................................................................................78

1-5.R00-1A Surkhrud River near Sultanpur .............................................................................................................84

1-6.L00-1A Laghman River at Pul-i-Qarghai............................................................................................................90

1-7.L00-1A Tagab River at Tagab............................................................................................................................97

1-8.21L-1A Salang River at Bagh-i-Lala.................................................................................................................103

1-8.2R0-1A Ghorband River at Pul-i-Aahawa ........................................................................................................110

1-8.3R0-1A Shatul River at Gulbahar.....................................................................................................................117

1-8.L00-3A Panjsher River at Shukhi.....................................................................................................................123

1-8.L00-5A Panjsher River at Gulbahar .................................................................................................................130

1-8.L00-8A Panjsher River at Omarz .....................................................................................................................137

1-9.R00-4W Chakari River at Band-i-Amir Ghazi...................................................................................................144

1-11.1L0-4W Qargha River Below Qargha Reservoir ............................................................................................151
iv

1-11.1L0-5W Qargha River above Qargha Reservoir ............................................................................................158

1-11.L00-1A Paghman River at Pul-i-Sokhta .........................................................................................................165

2-4.000-5A Urgun River at Pirkoti ..........................................................................................................................172

2-4.4L0-2T Dahane Legad River near Urgun.........................................................................................................178

8-0.000-1M Hari Rud River at Tir Pul.....................................................................................................................184

8-0.000-2M Hari Rud River at Pul-i-Hashimi ..........................................................................................................190

8-0.000-3S Hari Rud River at Pul-i-Pashtoon ........................................................................................................196

8-0.000-4M Hari Rud River at Robat-i-Akhond ......................................................................................................202

8-0.000-5M Hari Rud River at Tagaw Ghaza.........................................................................................................208

8-0.000-7M Hari Rud River at Chekhcheran..........................................................................................................215

8-0.000-9M Hari Rud River at Daulatyar................................................................................................................222

8-1.R00-9T Senjab River at Khush Rabat..............................................................................................................228

8-2.R00-3A Karukh River near Herat .....................................................................................................................234

8-3.L00-1A Kowgan River at Langar......................................................................................................................240

8-3.L00-6A Kowgan River at Tangi Azu.................................................................................................................247

8-11.L00-1A Lal River at Shinya ............................................................................................................................254

9-0.000-1M Murghab River at Bala Murghab.........................................................................................................260

9-0.000-5M Murghab River at Qala-i-Niazkhan......................................................................................................266

9-1.000-1A Gulran River at Char Takhta................................................................................................................272

9-2.000-1A Kushk River at Chil Dukhtaran ............................................................................................................278

9-3.000-1A Kashan River at Babulai......................................................................................................................284

9-4.R00-8A Chichaktu River at Chichaktu..............................................................................................................290

9-5.L00-1A Bum River at Luka-i-Surkh ..................................................................................................................296

10-0.000-3M Shirin Tagab River at Pata Baba ......................................................................................................302

10-0.000-4M Shirin Tagab River at Daulatabad.....................................................................................................309

10-0.000-6M Shirin Tagab River at Khisht Pul .......................................................................................................315

10-1.1L0-7A Qaisar River at Qaisar.......................................................................................................................321

10-1.L00-1T Maimana River near Pata Baba.........................................................................................................327

11-0.000-4M Sare Pul River at Asiabad.................................................................................................................333

11-1.R00-1A Shorab River River near Sare Pul.....................................................................................................339

12-0.000-1M Balkh River at Rabat-i-Bala...............................................................................................................345

12-0.000-9M Balkh River near Nayak ....................................................................................................................352

12-0.000-10M Balkh River Below Band-i-Amir.......................................................................................................358

12-1.R00-1A Suf River near Kishandeh.................................................................................................................364

13-0.000-1M Khulm River at Tangi Tashqurghan ..................................................................................................370

13-0.000-2M Khulm River at Sayad .......................................................................................................................376

14-0.000-1M Kunduz River at Kulukh Tepa ...........................................................................................................382
v

14-0.000-2M Kunduz River at Char Dara...............................................................................................................388

14-0.000-3M Kunduz River at Gerdab ...................................................................................................................394

14-0.000-4M Kunduz River at Baghlan ..................................................................................................................401

14-0.000-5S Kunduz River at Pul-i-Khumri ............................................................................................................407

14-0.000-6M Kunduz River at Pul-i-Konda Sang ...................................................................................................414

14-0.000-8M Kunduz River at Dasht-i-Safed .........................................................................................................420

14-1.1L0-1A Bangi River at Pul-i-Bangi .................................................................................................................426

14-1.R00-2A Taloqan River at Pul-i-Chugha..........................................................................................................433

14-1.R00-5A Farkhar River near Taloqan..............................................................................................................440

14-5.R00-1A Andarab River at Doshi.....................................................................................................................446

14-9.5R0-1T Foladi River at Bamyan.....................................................................................................................452

14-9.R00-1A Bamyan River at Doab......................................................................................................................458

14-9.R00-6T Bamyan River at Ahangaran.............................................................................................................464

14-9.R00-8A Bamyan River at Bamyan .................................................................................................................470

15-0.000-1M Kokcha River at Khogaghar..............................................................................................................476

15-0.000-3M Kokcha River near Keshem..............................................................................................................483

15-0.000-6M Kokcha River near Jurm ...................................................................................................................489

15-1.L00-1A Keshem River near Keshem..............................................................................................................495

15-10.R00-1A Warduj River at Shashpul ...............................................................................................................501

15-10.R00-2A Warduj River near Baharak.............................................................................................................507
vi

Figures

Figure 1. Map showing location of streamgages within the Kabul and Indus Basins for which streamflow statistics 

are published in this report ............................................................................................................................................ 2

Figure 2. Map showing location of streamgages within the Amu Darya Basin for which streamflow statistics are 

published in this report................................................................................................................................................... 3

Figure 3. Map showing locations of streamgages within the Northern Basins for which streamflow statistics are 

published in this report................................................................................................................................................... 4

Figure 4. Map showing locations of streamgages within the Hari Rud and Murghab Basins for which streamflow 

statistics are published in this report.............................................................................................................................. 5

Table

Table 1. List of streamgages in Afghanistan for which streamflow statistics are published in this report................. 6
vii

Conversion Factors

Multiply By To obtain

Length

meter (m) 3.281 foot (ft)

kilometer (km) 0.6214 mile (mi)

Area

square meter (m2) 0.0002471 acre

hectare (ha) 2.471 acre

square kilometer (km2) 247.1 acre

square meter (m2) 10.76 square foot (ft2)

square hectometer (hm2) 0.003861 section (640 acres or 1 square mile)

hectare (ha) 0.003861 square mile (mi2)

square kilometer (km2) 0.3861 square mile (mi2)

Volume

cubic meter (m3) 264.2 gallon (gal)

cubic meter (m3) 0.0002642 million gallons (Mgal)

cubic meter (m3) 35.31 cubic foot (ft3)

cubic meter (m3) 1.308 cubic yard (yd3)

cubic meter (m3) 0.0008107 acre-foot (acre-ft)

Flow rate

cubic meter per second (m3/s) 70.07 acre-foot per day (acre-ft/d)

cubic meter per second (m3/s) 35.31 cubic foot per second (ft3/s)

cubic meter per second per square 

kilometer [(m3/s)/km2]

91.49 cubic foot per second per square mile 

[(ft3/s)/mi2]

cubic meter per second (m3/s) 22.83 million gallons per day (Mgal/d)

Altitude, as used in this report, refers to distance above mean sea level at an unknown vertical datum.
1

Streamflow Characteristics at Streamgages in 

Northern Afghanistan and Selected Locations

By Scott A. Olson and Tara Williams-Sether

Abstract

Statistical summaries of streamflow data for 79 historical streamgages in Northern Afghanistan

and other selected historical streamgages are presented in this report. The summaries for each 

streamgage include (1) station description, (2) graph of the annual mean discharge for the period of 

record, (3) statistics of monthly and annual mean discharges, (4) monthly and annual flow duration, 

(5) probability of occurrence of annual high discharges, (6) probability of occurrence of annual low 

discharges, (7) probability of occurrence of seasonal low discharges, (8) annual peak discharges for the 

period of record, and (9) monthly and annual mean discharges for the period of record.

Introduction

Preliminary hydrologic evaluations are needed to determine the water-resource priorities in all 

areas of Afghanistan for agricultural, industrial, and residential water uses. This report focuses on 

providing streamflow characteristics of 79 streamgages in the northern half of Afghanistan, primarily in 

the Kabul, Amu Darya, Northern, Hari Rud and Murghab Basins (figs. 1–4). This report also includes 

some streamgages in other parts of Afghanistan that were not included in previous reports (WilliamsSether, 2008; Vining, 2010). The basins represented in the report are in arid and mountainous 

environments, often fed by melting snow from the high mountains and infrequent storms. 

Because there can be great fluctuations in streamflow, from flood to drought, in Afghanistan, 

knowledge of the magnitude and time distribution of streamflow is essential for all aspects of water 

management and environmental planning. To provide the Afghan managers with necessary streamflow 

information, the U.S. Geological Survey, in cooperation with the U.S. Task Force for Business and 

Stability Operations, computed streamflow statistics for data collected at historical streamgages in 

northern Afghanistan and selected locations in southeastern Afghanistan. Agencies responsible for the 

development and management of the surface-water resources of Afghanistan can use the data provided 

in this report to assist in making safe, economical, and environmentally sound water-resource planning 

decisions. The historical streamgages used are listed in table 1 and their locations are shown in 

figures 1–4.
2

Figure 1. Location of streamgages within the Kabul and Indus Basins for which streamflow statistics are 

published in this report. Streamgage identification data shown in table 1.
3

Figure 2. Location of streamgages within the Amu Darya Basin for which streamflow statistics are published in 

this report. Streamgage identification data shown in table 1.
4

Figure 3. Locations of streamgages within the Northern Basins for which streamflow statistics are published in 

this report. Streamgage identification data shown in table 1.
5

Figure 4. Locations of streamgages within the Hari Rud and Murghab Basins for which streamflow statistics are 

published in this report. Streamgage identification data shown in table 1.
6

Table 1. List of streamgages in Afghanistan for which streamflow statistics are published in this report.

Afghan 

identification 

number

U.S. Geological 

Survey identification 

number

Station name

1-0.000-1M 341400071020000 Kabul River at Dakah

1-0.000-4S 342800070220000 Kabul River near Daronta

1-0.000-5W 343700069430000 Kabul River at Naghlu

1-0.000-6M 343400069240000 Kabul River at Tang-i-Gharu

1-2.R00-7T 340600070220000 Hazarnaw River at Sabay

1-4.1R0-1A 345400071080000 Pech River at Chaghasarai

1-4.2R0-1A 352300071320000 Landaisin River near Gawardesh

1-4.L00-1A 342800070330000 Konar River at Pul-i-Kama

1-4.L00-2T 343800070490000 Konar River near Konari

1-4.L00-3A 344900071070000 Konar River at Nawabad

1-4.L00-4T 345300071100000 Konar River near Asmar

1-5.R00-1A 342500070180000 Surkhrud River near Sultanpur

1-6.L00-1A 343300070140000 Laghman River at Pul-i-Qarghai

1-7.L00-1A 344000069410000 Tagab River at Tagab

1-8.21L-1A 350900069130000 Salang River at Bagh-i-Lala

1-8.2R0-1A 350500069080000 Ghorband River at Pul-i-Ashawa

1-8.3R0-1A 350900069170000 Shatul River at Gulbahar

1-8.L00-3A 345600069290000 Panjsher River at Shukhi

1-8.L00-5A 351000069170000 Panjsher River at Gulbahar

1-8.L00-8A 352200069380000 Panjsher River at Omarz

1-9.R00-4W 342500069230000 Chakari River at Band-i-Amir Ghazi

1-11.1L0-4W 343300069020000 Qargha River below Qargha Reservior

1-11.1L0-5W 343400069010000 Qargha River above Qargha Reservoir

1-11.L00-1A 343000069080000 Paghman River at Pul-i-Sokhta

2-4.000-5A 325500069150000 Urgun River at Pirkoti

2-4.4L0-2T 325800069090000 Dahane Legad River near Urgun

8-0.000-1M 343600061160000 Hari Rud River at Tir Pul

8-0.000-2M 342000061560000 Hari Rud River at Pul-i-Hashimi

8-0.000-3S 341700062130000 Hari Rud River at Pul-i-Pashtoon

8-0.000-4M 341600062560000 Hari Rud River at Robat-I-Akhond

8-0.000-5M 342100063390000 Hari Rud River at Tagaw Ghaza

8-0.000-7M 343100065150000 Hari Rud River at Chekhcheran

8-0.000-9M 343300065460000 Hari Rud River at Daulatyar

8-1.R00-9T 344100062070000 Senjab River at Khush Rabat

8-2.R00-3A 342600062280000 Karukh River near Herat

8-3.L00-1A 341300063000000 Kowgan River at Langar

8-3.L00-6A 340800064120000 Kowgan River at Tangi Azu

8-11.L00-1A 343000065400000 Lal River at Shinya

9-0.000-1M 353500063190000 Murghab River at Bala Murghab

9-0.000-5M 350200064010000 Murghab River at Qala-i-Niazkhan

9-1.000-1A 352300062020000 Gulran River at Char Takhta
7

Table 1. List of streamgages in Afghanistan for which streamflow statistics are published in this report.

—Continued

Afghan 

identification 

number

U.S. Geological 

Survey identification 

number

Station name

9-2.000-1A 351300062170000 Kushk River at Chil Dukhtaran

9-3.000-1A 352000062550000 Kashan River at Babulai

9-4.R00-8A 354400064050000 Chichaktu River at Chichaktu

9-5.L00-1A 351400063280000 Bum River at Luka-i-Surkh

10-0.000-3M 363500064520000 Shirin Tagab River at Pata Baba

10-0.000-4M 362700064530000 Shirin Tagab River at Daulatabad

10-0.000-6M 355700064540000 Shirin Tagab River at Khisht Pul

10-1.1L0-7A 354200064180000 Qaisar River at Qaisar

10-1.L00-1T 363200064530000 Maimana River near Pata Baba

11-0.000-4M 361200065570000 Sare Pul River at Asiabad

11-1.R00-1A 361100066020000 Shorab River near Sare Pul

12-0.000-1M 363500066580000 Balkh River at Rabat-i-Bala

12-0.000-9M 344500067000000 Balkh River near Nayak

12-0.000-10M 344900067100000 Balkh River below Band-i-Amir

12-1.R00-1A 360800066570000 Suf River near Kishandeh

13-0.000-1M 364000067420000 Khulm River at Tangi Tashqurghan

13-0.000-2M 363500067470000 Khulm River at Sayad

14-0.000-1M 365900068180000 Kunduz River at Kulukh Tepa

14-0.000-2M 364200068500000 Kunduz River at Char Dara

14-0.000-3M 362200068520000 Kunduz River at Gerdab

14-0.000-4M 360600068400000 Kunduz River at Baghlan

14-0.000-5S 355600068430000 Kunduz River at Pul-i-Khumri

14-0.000-6M 353600068360000 Kunduz River at Pul-i-Konda Sang

14-0.000-8M 351800067550000 Kunduz River at Dasht-i-Safed

14-1.1L0-1A 364200069150000 Bangi River at Pul-i-Bangi

14-1.R00-2A 364400069120000 Taloqan River at Pul-i-Chugha

14-1.R00-5A 363800069430000 Farkhar River near Taloqan

14-5.R00-1A 353600068410000 Andarab River at Doshi

14-9.5R0-1T 344900067490000 Foladi River at Bamyan

14-9.R00-1A 351600067590000 Bamyan River at Doab

14-9.R00-6T 344900067550000 Bamyan River at Ahangaran

14-9.R00-8A 345000067490000 Bamyan River at Bamyan

15-0.000-1M 370500069280000 Kokcha River at Khojaghar

15-0.000-3M 365700070030000 Kokcha River near Keshem

15-0.000-6M 365600070520000 Kokcha River near Jurm

15-1.L00-1A 365500070030000 Keshem River near Keshem

15-10.R00-1A 370100070500000 Warduj River at Shashpul

15-10.R00-2A 365800070540000 Warduj River near Baharak
8

History of the Streamgaging Program in Afghanistan

Streamgaging began in Afghanistan in the mid-1940s at a few sites. The number of sites 

increased over the years until the late 1970s. Streamgaging was discontinued soon after the Soviet 

invasion of Afghanistan in 1979. Until 1978, Afghanistan had a network of approximately 

160 streamgages. No streamflow data were collected after September 1980 until recently. In 2005, 

three historical streamgages were re-established and currently (2010) much of the historic network has 

been re-established and is being operated by the Afghanistan Ministry of Energy and Water.

Explanation of Streamgage Summaries

Streamgage summaries are presented so that each station description and tables of streamflow 

statistics are presented in the same order and format for each streamgage, including the same relative 

placement on the pages. Because the statistical information listed in the tables was created by computer 

“data retrievals” or from statistical program results, significant figures were not always rounded to 

U.S. Geological Survey standards. The order of presentation is as follows:

1. Station description,

2. Graph of the annual mean discharge for the period of record,

3. Table of statistics of monthly and annual mean discharges,

4. Table of monthly and annual flow duration,

5. Table of probability of occurrence of annual high discharges,

6. Table of probability of occurrence of annual low discharges,

7. Table of probability of occurrence of seasonal low discharges,

8. Table of annual peak discharge and corresponding gage height for the period of record, and

9. Table of monthly and annual mean discharges for the period of record.

Station Description

The location, drainage area, period of record, and other available information about each 

streamgage included in this report are presented in the station description. This information is compiled 

from records originally published by the Afghanistan Ministry of Energy and Water. The following 

comments clarify information presented under the various headings of the station description.

LOCATION: Information on streamgage location is limited to latitude and longitude.

DRAINAGE AREA: Drainage area is as reported by the Afghanistan Ministry of Energy and 

Water from Survey of India maps. The accuracy of the drainage areas is unknown.

ALTITUDE: The datum of the streamgage referenced to mean sea level.

PERIOD OF RECORD: The period of record is the period for which there are published records 

for the streamgage or for an equivalent streamgage. An equivalent streamgage is a streamgage that was 

in operation prior to or after the subject streamgage, and whose location is such that records from it can 

reasonably be considered equivalent with records from the subject streamgage. This situation arises 
9

when a streamgage is relocated upstream or downstream and given a new streamgage number or name, 

but the changes in drainage area and other basin characteristics are not significantly different.

GAGE: The type of streamgage or recorder that is or was used to collect data. A condensed 

history of the types, locations, and datums of previous streamgages are given under this heading when 

available.

Statistics of Monthly and Annual Mean Discharges

Statistics of monthly and annual mean discharges presented for each streamgage include (1) the 

maximum, minimum, and mean monthly discharges and (2) the maximum, minimum, and mean annual 

discharges. The water years (October 1 through September 30) in which the maximum and minimum 

discharges occurred are listed with the respective values, and the standard deviation and coefficient of 

variation of the monthly and annual mean discharges are listed with the respective values. Also, the 

percentage of the annual discharge that is comprised by each monthly mean discharge is listed in the 

table. The statistics of monthly and annual means discharges were computed using statistical 

applications built into the U.S. Geological Survey Automated Data Processing System (ADAPS) 

Version 4.9 (U.S. Geological Survey, 2009).

Each of the statistics is explained in the following paragraphs. As an aid to the readers’ 

understanding of how the monthly mean and annual mean discharges are determined, data for the 

streamgage Kokcha River at Khojaghar (15-0.000-1M) are used as an example. Each monthly mean is 

the mean of the daily values for the month. Months or years for which all daily values are not available 

are not included in the compilation of statistics.

The maximum monthly mean discharge is the maximum value of all the monthly mean values 

for a given month during the period of record. The maximum mean value for October is 142 m3

/s, which

occurred during water year 1968. Similarly, the minimum monthly mean discharge is the minimum 

value of all the monthly mean values for a specific month over the period of record. The minimum mean 

value for October is 82.2 m3/s, which occurred during water year 1972. The maximum and minimum 

monthly mean values can be found in the statistics of monthly and annual mean discharges table or by 

searching the columns of the monthly and annual mean discharges table.

The mean monthly discharge is the mean of all the monthly mean discharges for a given month 

for the period of record, and the standard deviation is a measure of the variability of the values. The 

mean monthly discharge for October is 110 m3/s, and the standard deviation is 19.9 m3/s. The mean 

monthly discharge for October is the same as the mean of all October daily values for the period of 

record used. However, the standard deviation obtained using monthly values is smaller than the standard 

deviation obtained using all daily values. The standard deviation is smaller because the monthly values 

have less variability than the daily values.

The coefficient of variation is the ratio of the standard deviation to the mean. The coefficient of 

variation is dimensionless. Because monthly mean discharges are generally much greater in spring than 

in winter, the standard deviations also are generally much greater in spring than in winter. However, 

dividing the standard deviation by the mean monthly discharge tends to normalize the measures for all 

months so a more meaningful comparison among months can be made.

The percentage of annual discharge is the percentage of the annual discharge occurring each 

month. It is calculated by dividing the mean monthly discharge for a given month by the total of the 
10

12 mean monthly discharges and multiplying by 100. Because of rounding of the monthly percentage, 

the sum of the 12 percentages may not always equal 100 percent.

The maximum, minimum, and mean annual discharges are selected or computed from the annual 

mean discharges for the period of record. The water years of occurrence of the maximum and minimum 

values are listed with the respective values, and the standard deviation of the annual mean discharge is 

listed with the mean discharge. For the Kokcha River at Khojaghar streamgage, the maximum annual 

mean discharge of 262 m3/s occurred in 1969, and the minimum annual mean discharge of 144 m3/s 

occurred in 1972. The mean annual discharge for the period of record is 198 m3/s.

Monthly and Annual Flow Duration

The monthly and annual flow-duration table is a magnitude and frequency analysis of daily 

discharge values. It is computed by tabulating the number of daily discharge values that fall within preselected class limits, computing the percentage of values within each class, and interpolating discharge 

values for the percentages shown in the table. Monthly values are calculated from daily values for all 

complete months of record, and annual values are calculated for all complete water years. The monthly 

and annual flow durations were computed using statistical applications built into U.S. Geological 

Survey ADAPS Version 4.9 (U.S. Geological Survey, 2009).

For example, at the Kokcha River at Khojaghar (15-0.000-1M) streamgage, the 90-percent flowduration value for October is 77.3 m3

/s. This indicates that 90 percent of all October daily discharge 

values for the period of record were equal to or greater than 77.3 m3

/s.

Probability of Occurrence of High or Low Discharges

The probabilities of occurrence of annual high discharges, annual low discharges, and seasonal 

low discharges are presented in three tables for each streamgage. Probability of occurrence is an 

estimate of the likelihood that a particular discharge in a stream will be equaled or exceeded in 1 year 

or, in the case of low flows, the likelihood that the discharge will not be equaled or exceeded during the 

year or season. The probability of occurrence of a high flow is called the exceedance probability, and 

the probability of occurrence of low flow is called the nonexceedance probability. For example, if the 

instantaneous discharge for the 0.20 exceedance probability is listed as 1,050 m3/s, then a 20-percent 

chance exists that a discharge equal to or greater than 1,050 m3/s will occur once during the year.

Recurrence interval is another way of expressing annual probability, and it is the reciprocal of 

the probability of occurrence. The recurrence interval for an exceedance probability of 0.20 is 5 years 

(1 divided by 0.20). For a long discharge record, the annual maximum discharge can be expected to 

equal or exceed 1,050 m3/s on average once every 5 years.

The table of probability of annual high discharges for each streamgage lists the maximum 

instantaneous discharge and the maximum mean discharge for 3, 7, 15, and 30 consecutive-day periods 

for selected exceedance probabilities and equivalent recurrence intervals. Values for the maximum 

instantaneous discharge are computed from the streamflow record according to the guidelines 

established by the U.S. Interagency Advisory Committee on Water Data (1982). No adjustments are 

made for length of record, and a station skew instead of a regional skew was used in the computations.

The U.S. Geological Survey PeakFQ software (Flynn and others, 2006) was used to compute the 

maximum instantaneous discharges for the selected exceedance probabilities. 
11

Values for the maximum daily mean discharges for 3, 7, 15, and 30 consecutive-day periods are 

computed from the annual high mean values of the corresponding periods. The computations are based 

on the log-Pearson Type III distribution (Helsel and Hirsch, 1992) using values obtained for the 

water year.

The table of probability of annual low discharges for each streamgage lists the minimum 

daily mean discharge for 1, 3, 7, 14, 30, 60, 90, 120, and 183 consecutive-day periods for selected 

nonexceedance probabilities and equivalent recurrence intervals. Values for the minimum mean 

discharges are computed from the annual low discharge values of the corresponding periods using the 

log-Pearson Type III distribution. Probabilities of annual low discharges are computed using values 

obtained for the climatic year (April 1 through March 31).

The table of probability of seasonal low discharges for each streamgage lists the minimum 

daily mean discharge for 1, 7, 14, and 30 consecutive-day periods for selected probabilities and 

equivalent recurrence intervals. These values are computed from the seasonal low mean values of the 

corresponding periods using the log-Pearson Type III distribution. The seasonal periods provided are 

December through February, March through May, June through August, and September through 

November.

The probabilities of the maximum mean discharge and the annual and seasonal minimum mean 

discharge were computed using SWSTAT (Lumb and others, U.S. Geological Survey, written commun., 

2002). SWSTAT is a U.S. Geological Survey computer program for interactive computation of surfacewater statistics.

The annual low discharge and the seasonal low discharges that occur in any given year are 

sensitive to natural-channel processes, such as evapotranspiration, and human-induced hydrologic 

modifications, such as the operation of many small water-storage reservoirs; the effects of surface-water 

withdrawal for agricultural, municipal, and industrial use; and the effects of return flow to the river. 

Evaluations of such processes and conditions should be made when using the statistics provided in 

this report.

Annual Peak Discharges

The annual peak discharges for each station are provided by water year. These peak discharges 

were used in the computation of the instantaneous maximum discharge exceedance probabilities for 

each streamgage. The data for the peaks discharges were taken directly from the Afghanistan 

Hydrologic Data Reports published by the Afghanistan Ministry of Water and Power. Peaks from 

incomplete water years were checked using hydrograph comparison with nearby streamgages to insure 

that the discharge was the annual peak discharge.

Monthly and Annual Mean Discharges

The monthly and annual mean discharges are found in the final table for each streamgage. The 

monthly and annual means discharges were computed using statistical applications built into 

U.S. Geological Survey ADAPS Version 4.9 (U.S. Geological Survey, 2009).
12

Data Considerations

The reliability of statistical data is related to the length of streamgage record. The Hydrology 

Subcommittee of the Interagency Advisory Committee on Water Data (1982) recommends that at least 

10 years of record be used for computing flood-frequency estimates. However, the record length for 

each streamgage in Afghanistan can vary substantially. The 10-year requirement was relaxed in this 

report so statistics could be computed for all streamgages. Subsequently, extreme high or low flows may 

be included in the streamflow record of one streamgage and not in another, resulting in inconsistencies 

in the streamflow statistics when comparing streamgage data. In some instances, there was insufficient 

data to compute a statistic and the statistic is reported as “not given.”

Statistics provided in the report are presented as computed by software with little evaluation. In 

addition, any differences in statistical values for pre- and post-regulation periods were not addressed in 

this report. It is the user’s responsibility to interpret the data and understand the limitations of the 

statistics computed with limited record length.

Selected References

Democratic Republic of Afghanistan, Ministry of Irrigation and Water Resources, 1985, Hydrological 

yearbook 1979–1980, Part I and II, Rivers of Indus and Helmand Basin (Kabul, Khuram, Helmand 

and Ghazni): Institute of Water Resources Development, Afghanistan Hydrologic Data Report 

RO 211, 131 p.

Democratic Republic of Afghanistan, Ministry of Water and Power, 1976, Hydrological yearbook 

1962–1975, Part III-8, Hari Rud river basin: Water and Soil Survey Department, Afghanistan 

Hydrologic Data Report RO 214, 118 p.

Democratic Republic of Afghanistan, Ministry of Water and Power, 1977, Hydrological yearbook 

1965–1975, Part I-1A, Lower Kabul river basin up to Naghlu reservoir: Water and Soil Survey 

Department, Afghanistan Hydrologic Data Report RO 213, 186 p.

Democratic Republic of Afghanistan, Ministry of Water and Power, 1979a, Hydrological yearbook 

1960–1975, Part V-14 and 15, Kunduz and Kokcha river basin: Water and Soil Survey Department, 

Afghanistan Hydrologic Data Report RO 222, 212 p.

Democratic Republic of Afghanistan, Ministry of Water and Power, 1979b, Hydrological yearbook 

1976–1978, Part V, Rivers of Amu basin (Kunduz and Kokcha): Water and Soil Survey Department, 

Afghanistan Hydrologic Data Report RO 220, 69 p.

Democratic Republic of Afghanistan, Ministry of Water and Power, 1981, Hydrological yearbook 

1976–1978, Part I, Rivers of Indus basin (Kabul, Khurran and Shamal): Water and Soil Survey 

Department, Afghanistan Hydrologic Data Report RO 218, 83 p.

Democratic Republic of Afghanistan, Ministry of Water and Power, date unknown, Hydrological 

yearbook 1963–1975, Part I-2, Khurran river basin: Water and Soil Survey Department, Afghanistan 

Hydrologic Data Report RO 216, 110 p.
13

Democratic Republic of Afghanistan, Ministry of Water and Power, date unknown, Hydrological 

yearbook 1964–1975, Part IV-9 to 13, Murghab, Shirintagab, Serepul, Balkh, and Khulm river basins: 

Water and Soil Survey Department, Afghanistan Hydrologic Data Report RO 208, 190 p.

Democratic Republic of Afghanistan, Ministry of Water and Power, date unknown, Hydrological 

yearbook 1976–1978, Part III, West flowing rivers (Khash, Farah, Adraskan and Harirud): Water and 

Soil Survey Department, Afghanistan Hydrologic Data Report RO 219, 77 p.

Democratic Republic of Afghanistan, Ministry of Water and Power, date unknown, Hydrological 

yearbook 1976–1978, Part IV, North flowing rivers (Murghab, Shirin Tagab, Sarepul, Balkh and 

Khulm): Water and Soil Survey Department, Afghanistan Hydrologic Data Report RO 209, 75 p.

Flynn, K.M., Kirby, W.H., and Hummel, P.R., 2006, User’s manual for program PeakFQ, Annual floodfrequency analysis using bulletin 17B guidelines: U.S. Geological Survey Techniques and Methods,

book 4, chap. B4, 42 p.

Helsel, D.R., and Hirsch, R.M., 1992, Statistical methods in water resources: New York, Elsevier 

Science Publishing Co., 522 p.

Lumb, A.M., Thomas, W.O., Jr., and Flynn, K.M., 2002, User’s manual for SWSTAT, a computer 

program for interactive computation of surface-water statistics: U.S. Geological Survey website 

accessed April 5, 2010, at http://water.usgs.gov/software/SWSTAT/.

U.S. Interagency Advisory Committee on Water Data, 1982, Guidelines for determining flood flow 

frequency, Bulletin 17-B of the Hydrology Subcommittee: Reston, Va., U.S. Geological Survey, 

Office of Water Coordination, 183 p.

U.S. Geological Survey, 2009, User’s manual for the national water information system of the U.S. 

Geological Survey—Automated data processing system (ADAPS) Version 4.9: U.S. Geological 

Survey website accessed April 5, 2010, at http://nwis.usgs.gov/currentdocs/adaps/adaps.book.html.

Vining, K.C., 2010, Streamflow characteristics of streams in southeastern Afghanistan: U.S. Geological 

Survey Data Series 508, 104 p.

Williams-Sether, Tara, 2008, Streamflow characteristics of streams in the Helmand Basin, Afghanistan:

U.S. Geological Survey Data Series 333, 341 p.
14

STEAMFLOW STATISTICS 
15

1-0.000-1M KABUL RIVER AT DAKAH

(U.S. Geological Survey identification number: 341400071020000)

LOCATION: Lat 34o14'N., long 71o02'E.

DRAINAGE AREA: 67,370 km2.

ELEVATION: 420 meters above mean sea level.

PERIOD OF RECORD: February 21, 1968 to July 22, 1980.

GAGE: Water-stage recorder.

0

100

200

300

400

500

600

700

800

900

1000

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
16

1-0.000-1M KABUL RIVER AT DAKAH, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 310 1974 209 1975 269 35.3 0.13 3.56

November 268 1970 132 1975 217 37.2 0.17 2.88

December 248 1970 105 1975 187 37.1 0.2 2.47

January 252 1970 89.1 1975 164 43.8 0.27 2.17

February 267 1980 81.2 1975 165 50.5 0.31 2.19

March 377 1968 104 1975 234 89.3 0.38 3.10

April 1,290 1973 369 1971 651 245 0.38 8.61

May 1,880 1973 593 1977 1,020 327 0.32 13.4

June 2,230 1972 1,150 1970 1,570 404 0.26 20.8

July 2,080 1973 999 1971 1,480 355 0.24 19.6

August 1,430 1973 817 1974 1,080 188 0.17 14.3

September 763 1973 380 1974 529 118 0.22 7.00

Annual 924 1973 477 1977 614 130 0.21 100
17

1-0.000-1M KABUL RIVER AT DAKAH, Continued 

Monthly and annual flow duration, in cubic meters per second 

[ng, not given] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 198 140 109 91.1 84.5 102 254 447 862 862 679 295 122 

90 217 166 140 113 112 117 297 518 998 940 710 314 140 

85 223 175 148 127 121 125 329 569 1,080 1,030 743 342 157 

80 227 185 163 131 127 135 360 631 1,160 1,220 800 359 173 

75 233 197 168 136 133 146 388 692 1,200 1,180 852 388 192 

70 239 205 170 138 137 153 410 759 1,290 1,230 893 418 210 

65 244 212 172 141 140 165 429 815 1,340 1,290 936 448 226 

60 251 215 176 145 145 182 454 876 1,380 1,350 979 479 246 

55 258 217 180 152 149 195 486 933 1,450 1,400 1,020 497 277 

50 263 220 185 157 152 206 529 1,000 1,500 1,450 1,070 513 322 

45 268 224 189 161 156 216 583 1,050 1,550 1,500 1,100 529 417 

40 278 229 193 165 161 224 635 1,090 1,610 1,540 1,150 543 534 

35 284 232 201 171 170 236 676 1,140 1,670 1,590 1,190 564 679 

30 290 236 206 180 179 258 735 1,180 1,740 1,650 1,240 594 823 

25 298 241 214 192 193 280 845 1,240 1,830 1,740 1,280 638 983 

20 309 247 223 207 210 306 939 1,320 1,970 1,850 1,340 679 1,140 

15 320 255 231 219 229 358 1,060 1,400 2,150 1,910 1,410 710 1,280 

10 335 266 240 234 248 412 1,220 1,540 2,360 2,020 1,500 754 1,460 

5 353 278 256 252 281 481 1,400 1,830 2,570 2,230 1,560 827 1,740 
18

1-0.000-1M KABUL RIVER AT DAKAH, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 1,230 1,170 1,100 1,060 966

0.95 1.05 1,460 1,350 1,270 1,200 1,100

0.90 1.11 1,590 1,470 1,380 1,290 1,180

0.80 1.25 1,760 1,620 1,530 1,420 1,300

0.50 2 2,140 1,970 1,860 1,730 1,570

0.20 5 2,600 2,430 2,290 2,150 1,940

0.10 10 2,860 2,720 2,570 2,430 2,180

0.04 25 3,170 3,080 2,900 2,790 2,480

0.02 50 3,390 3,340 3,140 3,060 2,710

0.01 100 3,590 3,610 3,380 3,340 2,930

0.005 200 3,790 3,870 1

3,620 3,630 3,160

0.002 500 4,040 ng ng ng ng

1

Data does not fit log-Pearson Type III curve, use with caution.

1-0.000-1M KABUL RIVER AT DAKAH, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 73.4 74.6 77.0 81.3 87.6 92.9 98.7 107 135

0.10 10 85.9 86.5 88.9 93.2 99.3 106 112 122 151

0.20 5 101 102 104 109 114 122 128 140 171

0.50 2 128 132 136 140 146 156 163 175 207
19

1-0.000-1M KABUL RIVER AT DAKAH, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 74.8 80.3 87.0 91.9 76.2 82.4 92.4 113

0.10 10 88.1 92.0 97.9 103 87.5 95.2 105 131

0.20 5 104 107 112 118 103 113 124 156

0.50 2 131 139 143 150 140 154 167 218

June-July-August September-October-November

0.05 20 551 644 688 777 121 132 137 148

0.10 10 564 653 723 831 139 150 156 166

0.20 5 586 669 770 901 161 171 179 188

0.50 2 654 730 877 1,050 198 208 216 224

1-0.000-1M KABUL RIVER AT DAKAH, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1968 June 11, 1968 2,655 1978 July 8, 1978 3,016

1969 June 20, 1969 2,091 1973 June 13, 1973 2,870

1970 June 29, 1970 1,600 1972 June 16, 1972 2,750

1971 June 1, 1971 1,410 1968 June 11, 1968 2,655

1972 June 16, 1972 2,750 1979 June 28, 1979 2,218

1973 June 13, 1973 2,870 1975 May 17, 1975 2,180

1974 July 17, 1974 1,790 1969 June 20, 1969 2,091

1975 May 17, 1975 2,180 1976 July 10, 1976 2,050

1976 July 10, 1976 2,050 1980 June 26, 1980 1,962

1977 June 26, 1977 1,860 1977 June 26, 1977 1,860

1978 July 8, 1978 3,016 1974 July 17, 1974 1,790

1979 June 28, 1979 2,218 1970 June 29, 1970 1,600

1980 June 26, 1980 1,962 1971 June 1, 1971 1,410
20

1-0.000-1M KABUL RIVER AT DAKAH, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[Data may not be rounded in accordance with U.S. Geological Survey publication standards; --, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1968 -- -- -- -- -- 377 861 1,190 2,220 1,870 1,230 500 --

1969 308 255 231 197 162 345 655 789 1,580 1,460 1,120 540 639

1970 309 268 248 252 227 222 507 858 1,150 1,030 1,120 676 574

1971 249 186 183 153 137 146 369 848 1,160 999 871 427 479

1972 224 218 176 126 131 196 569 1,260 2,230 1,710 1,210 650 726

1973 269 210 178 168 221 342 1,290 1,880 2,210 2,080 1,430 763 924

1974 310 220 168 139 135 172 417 679 1,240 1,190 817 380 491

1975 209 132 105 89.1 81.2 104 576 975 1,490 1,280 1,130 532 562

1976 251 199 180 164 175 185 659 899 1,300 1,550 891 496 580

1977 283 223 191 165 148 168 427 593 1,180 1,110 839 380 477

1978 237 197 158 132 150 228 563 1,030 1,470 1,740 1,160 543 638

1979 304 254 208 158 150 209 735 994 1,570 1,710 1,160 458 663

1980 278 246 216 222 267 351 834 1,200 1,590 -- -- -- --
21

1-0.000-4S KABUL RIVER NEAR DARONTA

(U.S. Geological Survey identification number: 342800070220000)

LOCATION: Lat 34o28'N., long 70o22'E.

DRAINAGE AREA: 34,375 km2.

ELEVATION: 585 meters above mean sea level.

PERIOD OF RECORD: October 1, 1959 to September 30, 1964.

GAGE: Water-stage recorder.

0

50

100

150

200

250

300

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
22

1-0.000-4S KABUL RIVER NEAR DARONTA, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 67.7 1961 50.2 1960 58.5 6.98 0.12 2.42

November 88.3 1960 64.9 1963 76.6 9.34 0.12 3.16

December 88.6 1961 83.6 1962 85.7 1.82 0.02 3.54

January 104 1964 80.2 1960 90.0 9.71 0.11 3.72

February 94.4 1964 73.8 1962 81.2 8.13 0.10 3.36

March 183 1960 70.5 1962 116 45.3 0.39 4.81

April 476 1960 164 1963 310 136 0.44 12.8

May 623 1960 202 1962 414 161 0.39 17.1

June 723 1963 415 1964 582 120 0.21 24.1

July 588 1960 296 1964 399 124 0.31 16.5

August 256 1960 94.1 1964 142 68.4 0.48 5.88

September 82.1 1960 51.9 1962 62.8 11.5 0.18 2.60

Annual 272 1960 152 1962 202 45.0 0.22 100
23

1-0.000-4S KABUL RIVER NEAR DARONTA, Continued 

Monthly and annual flow duration, in cubic meters per second 

[ng, not given] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 46.5 58.5 77.2 76.2 68.4 64.8 118 165 271 169 69.1 45.3 54.9

90 49.7 59.4 78.8 77.6 70.9 67.2 127 178 355 197 72.5 49.0 60.1

85 50.8 60.7 80.2 78.3 72.0 69.6 138 207 460 208 76.4 54.9 65.0

80 51.5 63.0 80.9 80.5 72.9 71.4 167 228 478 239 82.0 55.6 69.7

75 53.7 67.0 82.3 82.2 74.2 73.2 187 263 491 287 86.0 56.3 74.3

70 54.9 68.9 83.1 83.3 75.3 78.6 199 306 511 321 90.1 56.9 78.1

65 56.6 70.5 83.6 83.9 76.1 81.4 212 370 521 337 93.1 57.5 81.9

60 58.5 72.9 83.9 85.2 76.9 84.6 230 385 531 361 96.6 58.1 85.1

55 58.8 74.1 85.0 87.4 77.9 88.2 249 411 603 379 101 58.6 88.3

50 59.2 75.0 87.0 88.8 79.1 95.0 263 430 624 397 107 59.1 91.7

45 59.7 76.6 87.3 90.2 79.8 107 299 452 644 417 115 59.6 101

40 61.2 79.9 87.6 91.4 80.6 111 325 465 660 439 128 60.1 118

35 61.8 82.3 88.1 92.6 81.5 115 360 485 676 464 134 62.6 165

30 62.4 84.0 89.8 93.9 82.9 128 375 508 689 485 151 64.1 212

25 63.6 85.4 90.1 96.1 86.7 149 399 525 702 500 170 68.0 280

20 65.7 86.8 90.3 97.3 90.1 166 426 544 715 517 204 69.4 379

15 66.8 89.2 90.5 99.9 93.8 186 458 592 729 548 243 72.0 455

10 67.9 91.2 91.5 105 98.4 202 506 632 750 620 279 74.6 518

5 ng 100 93.2 110 105 228 594 678 780 693 316 86.3 655
24

1-0.000-4S KABUL RIVER NEAR DARONTA, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge1 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 423 416 395 2378 394

0.95 1.05 492 491 480 464 448

0.90 1.11 541 539 528 510 479

0.80 1.25 614 603 588 564 519

0.50 2 821 754 705 656 600

0.20 5 1,170 951 822 728 690

0.10 10 1,440 1,080 881 756 741

0.04 25 1,850 1,230 941 2

779 797

0.02 50 2,190 1,350 978 2

790 835

0.01 100 2,570 1,460 1,010 2

799 869

0.005 200 3,000 1,580 1,040 2

805 902

0.002 500 3,650 ng ng ng ng

1

Less than 10 years of data used.

2

Data does not fit log-Pearson Type III curve, use with caution.

1-0.000-4S KABUL RIVER NEAR DARONTA, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second; ng, not given] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 ng ng ng ng ng ng ng ng ng

0.10 10 ng ng ng ng ng ng ng ng ng

0.20 5 ng ng ng ng ng ng ng ng ng

0.50 2 ng ng ng ng ng ng ng ng ng
25

1-0.000-4S KABUL RIVER NEAR DARONTA, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second; ng, not given] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 59.7 67.4 69.9 72.1 48.4 58.6 59.1 57.5

0.10 10 62.3 68.8 71.4 73.5 52.8 63.1 64.1 65.5

0.20 5 65.3 70.5 73.2 75.3 58.3 69.2 71.2 77.1

0.50 2 70.8 73.7 76.6 79.0 69.1 83.4 88.9 107

June-July-August September-October-November

0.05 20 55.5 63.5 68.4 77.4 ng ng ng ng

0.10 10 56.6 64.3 69.3 82.1 ng ng ng ng

0.20 5 58.9 66.3 71.8 90.3 ng ng ng ng

0.50 2 69.2 76.6 84.0 118 ng ng ng ng

1-0.000-4S KABUL RIVER NEAR DARONTA, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1960 April 17, 1960 1,560 1960 April 17, 1960 1,560

1961 June 5, 1961 790 1962 June 12, 1962 900

1962 June 12, 1962 900 1963 June, 1963 795

1963 June, 1963 795 1961 June 5, 1961 790

1964 June 11, 1964 528 1964 June 11, 1964 528
26

1-0.000-4S KABUL RIVER NEAR DARONTA, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[--, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1960 50.2 88.3 85.8 80.2 78.9 183 476 623 670 588 256 82.1 272

1961 67.7 82.0 88.6 92.2 83.0 110 353 472 568 342 101 62.7 202

1962 61.4 77.8 83.6 81.3 73.8 70.5 176 202 536 310 103 51.9 152

1963 53.0 64.9 85.1 92.1 76.0 81.9 164 460 723 461 157 60.1 207

1964 60.2 69.9 85.5 104 94.4 137 382 315 415 296 94.1 57.2 176
27

1-0.000-5W KABUL RIVER AT NAGHLU

(U.S. Geological Survey identification number: 343700069430000)

LOCATION: Lat 34o37'N., long 69o43'E.

DRAINAGE AREA: 26,046 km2.

ELEVATION: 985 meters above mean sea level.

PERIOD OF RECORD: October 1, 1959 to September 30, 1980.

GAGE: Water-stage recorder.

0

50

100

150

200

250

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
28

1-0.000-5W KABUL RIVER AT NAGHLU, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 60.2 1974 33.7 1967 44.8 8.01 0.18 3.32

November 70.0 1960 39.1 1976 54.2 10.2 0.19 4.03

December 85.6 1968 34.1 1978 55.0 15.2 0.28 4.09

January 102 1968 34.9 1972 59.9 16.8 0.28 4.45

February 89.2 1973 41.0 1979 57.5 12.4 0.22 4.27

March 159 1968 31.7 1967 67.1 32.8 0.49 4.98

April 362 1960 45.9 1971 171 86.7 0.51 12.7

May 475 1960 64.0 1977 228 95.9 0.42 16.9

June 563 1960 117 1971 313 131 0.42 23.3

July 524 1960 34.4 1971 185 112 0.60 13.8

August 178 1960 29.2 1971 67.3 32.5 0.48 5.00

September 62.0 1960 31.1 1971 42.8 7.68 0.18 3.18

Annual 217 1960 56.2 1971 112 37.9 0.34 100
29

1-0.000-5W KABUL RIVER AT NAGHLU, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 32.2 33.6 29.3 31.1 34.0 26.9 30.7 50.5 70.1 38.0 30.6 29.9 31.6

90 34.2 38.8 32.3 34.7 37.8 30.8 43.3 72.4 133 49.7 34.8 32.8 35.8

85 35.4 40.4 34.8 37.5 40.7 35.1 48.5 98.4 151 57.5 37.8 34.9 38.5

80 36.4 42.1 37.0 40.7 43.2 38.4 55.1 123 170 69.5 41.1 36.0 41.4

75 37.6 43.9 39.5 44.0 46.5 41.7 73.1 143 197 85.1 43.7 36.9 44.4

70 38.7 45.9 42.7 47.8 48.7 46.3 88.2 159 220 98.2 45.5 37.6 47.4

65 39.7 47.6 46.8 51.1 51.6 50.3 102 175 240 110 47.4 38.3 50.4

60 40.6 49.1 49.9 53.7 53.4 52.0 114 191 262 123 49.2 39.2 53.6

55 41.5 50.5 51.8 57.0 55.1 53.7 129 203 290 139 51.1 40.2 56.9

50 42.6 52.6 53.7 59.8 56.7 55.4 144 214 307 156 53.0 41.1 60.5

45 43.9 54.8 55.9 61.8 58.2 58.9 161 230 321 174 54.9 42.2 65.3

40 45.4 57.5 58.0 63.8 59.8 62.8 178 247 340 193 58.9 43.5 70.8

35 47.3 60.4 60.4 67.2 61.8 67.3 195 265 358 212 62.8 44.7 77.2

30 49.2 62.6 63.0 70.5 64.4 72.4 214 284 376 234 66.8 46.6 93.2

25 51.6 64.3 67.1 72.6 67.4 77.2 240 303 407 258 71.9 48.5 131

20 53.9 65.9 71.6 74.8 69.9 81.7 268 328 450 283 80.3 50.6 174

15 56.1 68.4 73.9 77.1 73.2 93.1 298 356 500 309 95.1 53.4 225

10 58.5 71.3 76.3 79.4 78.0 118 338 385 542 350 120 55.8 287

5 62.2 74.7 81.5 81.7 83.8 158 391 449 597 416 167 58.1 368
30

1-0.000-5W KABUL RIVER AT NAGHLU, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 188 178 157 143 124

0.95 1.05 251 235 208 188 166

0.90 1.11 294 271 241 217 193

0.80 1.25 354 320 286 257 231

0.50 2 506 435 392 354 320

0.20 5 721 582 525 481 436

0.10 10 867 672 607 563 509

0.04 25 1,050 779 704 663 597

0.02 50 1,200 855 773 736 659

0.01 100 1,340 928 839 807 720

0.005 200 1,490 999 902 878 779

0.002 500 1,680 ng ng ng ng

1-0.000-5W KABUL RIVER AT NAGHLU, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 10.4 14.7 18.7 24.2 30.5 32.8 34.0 36.7 38.7

0.10 10 12.1 16.6 20.6 25.4 31.2 33.8 35.5 38.2 40.9

0.20 5 14.7 19.2 23.2 27.2 32.3 35.3 37.5 40.2 43.8

0.50 2 21.5 25.6 29.2 31.8 35.5 39.0 42.1 45.0 49.9
31

1-0.000-5W KABUL RIVER AT NAGHLU, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 14.4 22.6 26.2 30.8 11.2 18.9 23.1 27.5

0.10 10 17.5 25.9 29.2 33.8 14.7 23.3 27.2 31.8

0.20 5 22.0 30.5 33.5 38.0 20.0 29.4 33.1 38.2

0.50 2 33.3 41.0 43.4 47.6 33.6 43.9 47.5 55.8

June-July-August September-October-November

0.05 20 24.3 29.5 33.8 34.2 20.7 27.6 29.9 31.9

0.10 10 26.1 31.2 35.4 37.8 22.3 28.8 31.0 33.1

0.20 5 28.7 33.9 37.9 43.2 24.5 30.5 32.6 34.7

0.50 2 36.1 41.5 45.8 58.2 29.8 34.9 36.6 38.7
32

1-0.000-5W KABUL RIVER AT NAGHLU, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1960 April 17, 1960 1,260 1960 April 17, 1960 1,260

1961 June 5, 1961 780 1967 April 28, 1967 863

1962 June 12, 1962 626 1961 June 5, 1961 780

1963 June 28, 1963 706 1968 June 11, 1968 733

1964 June 12, 1964 534 1963 June 28, 1963 706

1965 April 23, 1965 482 1978 July 7, 1978 698

1966 June 19, 1966 358 1962 June 12, 1962 626

1967 April 28, 1967 863 1972 April 28, 1972 580

1968 June 11, 1968 733 1964 June 12, 1964 534

1969 June 20, 1969 490 1973 June 13, 1973 531

1970 May 23, 1970 353 1980 May 15, 1980 500

1971 June 7, 1971 224 1969 June 20, 1969 490

1972 April 28, 1972 580 1965 April 23, 1965 482

1973 June 13, 1973 531 1976 April 25, 1976 474

1974 June 18, 1974 258 1979 June 24, 1979 427

1975 June 18, 1975 384 1975 June 18, 1975 384

1976 April 25, 1976 474 1966 June 19, 1966 358

1977 June 25, 1977 277 1970 May 23, 1970 353

1978 July 7, 1978 698 1977 June 25, 1977 277

1979 June 24, 1979 427 1974 June 18, 1974 258
33

1-0.000-5W KABUL RIVER AT NAGHLU, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[Data may not be rounded in accordance with U.S. Geological Survey publication standards] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1960 39.4 70.0 75.6 74.3 65.9 113 362 475 563 524 178 62.0 217

1961 41.8 58.9 60.5 62.0 58.3 60.5 279 305 394 196 62.9 38.5 135

1962 38.5 57.4 67.0 72.0 62.8 54.8 132 143 314 167 57.6 38.4 100

1963 35.1 42.4 54.7 59.2 49.0 52.8 104 310 525 307 100 39.5 140

1964 39.4 45.5 55.2 67.0 60.9 87.8 246 199 275 191 60.7 37.9 114

1965 36.1 44.6 56.0 65.2 58.0 76.4 251 325 343 286 100 56.7 142

1966 57.5 67.3 75.7 75.4 67.2 83.1 165 171 253 103 66.2 40.6 102

1967 33.7 47.7 60.6 73.4 64.8 31.7 102 292 425 296 87.8 35.0 129

1968 46.7 63.2 85.6 102 52.3 159 238 247 535 302 83.4 36.1 162

1969 45.8 62.7 73.3 74.5 74.7 111 211 170 368 230 90.1 45.6 130

1970 46.7 60.5 70.5 76.5 74.7 73.9 72.4 142 175 80.0 49.9 45.2 80.6

1971 36.9 59.1 41.1 50.9 43.8 36.8 45.9 148 117 34.4 29.2 31.1 56.2

1972 56.4 44.5 36.4 34.9 52.0 33.2 198 318 407 185 61.2 46.2 123

1973 55.4 61.5 44.3 47.0 89.2 103 307 313 406 166 51.1 48.6 141

1974 60.2 44.0 36.3 44.5 51.2 52.0 87.5 90.8 140 82.8 49.4 51.9 65.8

1975 42.0 51.9 39.2 36.8 43.1 43.5 104 157 234 135 47.8 39.9 81.3

1976 42.1 39.1 43.8 50.3 54.5 48.0 208 246 211 149 45.2 39.8 98.1

1977 43.8 39.1 42.1 59.2 44.9 41.7 85.7 64.0 157 73.8 36.2 36.4 60.2

1978 38.3 46.3 34.1 43.7 42.8 48.7 92.4 228 231 147 41.7 47.6 86.9

1979 53.6 64.5 46.7 38.7 41.0 35.2 123 196 270 166 69.3 47.1 96.1

1980 50.3 68.1 56.9 50.1 56.9 62.2 170 245 240 71.9 45.0 35.4 95.9
34

1-0.000-6M KABUL RIVER AT TANG-I-GHARU

(U.S. Geological Survey identification number: 343400069240000)

LOCATION: Lat 34o34'N., long 69o24'E.

DRAINAGE AREA: 12,850 km2.

ELEVATION: 1,770 meters above mean sea level.

PERIOD OF RECORD: October 1, 1959 to September 30, 1980.

GAGE: Water-stage recorder.

0

5

10

15

20

25

30

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
35

1-0.000-6M KABUL RIVER AT TANG-I-GHARU, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 9.85 1961 0.06 1971 2.93 3.45 1.18 1.58

November 24.4 1961 0.56 1972 12.0 7.47 0.62 6.49

December 26.6 1966 6.77 1972 17.7 5.85 0.33 9.52

January 27.9 1968 11.5 1972 19.9 4.71 0.24 10.7

February 28.1 1969 13.5 1979 20.5 3.97 0.19 11.1

March 45.5 1968 14.4 1979 25.8 7.67 0.3 13.9

April 96.2 1964 6.17 1970 48.0 28.4 0.59 25.9

May 93.1 1965 0.44 1970 28.3 27.8 0.98 15.3

June 31.1 1965 0.15 1970 5.86 8.51 1.45 3.16

July 13.6 1965 0.09 1979 2.60 3.71 1.43 1.40

August 5.64 1978 0.01 1974 1.14 1.49 1.30 0.61

September 3.76 1965 0.04 1970 0.72 0.91 1.26 0.39

Annual 28.4 1965 6.71 1971 15.4 6.15 0.40 100
36

1-0.000-6M KABUL RIVER AT TANG-I-GHARU, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 0.07 0.22 8.65 12.2 13.6 13.8 4.93 0.29 0.12 0.08 0.03 0.04 0.12

90 0.12 0.47 10.0 13.8 15.6 15.6 8.67 0.46 0.18 0.09 0.08 0.08 0.19

85 0.15 3.03 10.9 14.8 16.2 16.8 13.5 0.67 0.25 0.13 0.11 0.13 0.27

80 0.19 4.51 11.5 15.8 16.8 18.4 17.1 1.05 0.33 0.16 0.14 0.14 0.38

75 0.21 5.64 12.6 16.2 17.3 19.5 21.0 2.25 0.42 0.19 0.15 0.16 0.64

70 0.22 6.62 13.8 16.8 17.8 20.4 27.3 5.21 0.52 0.22 0.17 0.18 1.04

65 0.24 7.35 15.2 18.3 18.3 21.2 31.4 7.00 0.67 0.27 0.20 0.20 2.30

60 0.31 8.12 16.8 18.9 18.8 21.8 34.3 9.99 0.78 0.34 0.24 0.23 4.65

55 0.47 9.34 17.3 19.4 19.4 22.4 37.3 13.3 0.94 0.40 0.30 0.26 7.78

50 0.70 11.2 17.8 19.9 20.5 23.3 40.3 16.9 1.27 0.47 0.34 0.28 11.5

45 0.91 13.2 18.6 20.4 21.2 24.3 44.4 20.8 1.94 0.59 0.40 0.31 14.3

40 1.79 14.9 19.3 20.8 21.9 25.5 48.9 24.5 2.49 0.78 0.50 0.37 16.9

35 2.76 16.4 20.1 21.6 22.5 26.8 54.4 30.0 3.14 1.00 0.65 0.51 18.6

30 3.62 17.7 21.1 22.2 23.1 28.1 59.6 36.6 4.43 1.29 0.81 0.65 20.2

25 4.60 19.0 22.3 23.2 23.5 30.1 64.6 43.1 6.70 2.20 0.98 0.77 21.9

20 5.69 20.5 23.3 24.1 24.5 32.1 72.7 52.4 10.4 3.07 1.22 0.91 24.6

15 6.82 22.0 24.4 25.8 24.9 34.4 83.8 65.5 14.7 5.17 1.53 1.21 27.8

10 8.54 23.7 25.5 26.6 25.9 38.0 95.2 78.3 20.5 8.28 2.48 2.08 32.9

5 12.9 25.7 26.8 27.8 26.8 48.1 122 102 27.5 12.3 4.57 3.50 52.8
37

1-0.000-6M KABUL RIVER AT TANG-I-GHARU, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 27.4 16.2 15.0 12.6 11.6

0.95 1.05 41.5 26.4 23.8 20.4 18.2

0.90 1.11 51.0 33.8 30.3 26.1 22.9

0.80 1.25 64.8 45.1 40.3 35.0 30.1

0.50 2 98.3 75.5 67.9 59.6 50.1

0.20 5 142 121 111 97.9 81.6

0.10 10 169 152 142 125 104

0.04 25 201 192 183 161 135

0.02 50 223 221 215 189 159

0.01 100 244 250 247 217 183

0.005 200 263 1

279 281 245 208

0.002 500 288 ng ng ng ng

1

Data does not fit log-Pearson Type III curve, use with caution.

1-0.000-6M KABUL RIVER AT TANG-I-GHARU, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 0 0 0.01 0.02 0.02 0.05 0.08 0.11 0.28

0.10 10 0.01 0.01 0.02 0.03 0.04 0.07 0.12 0.16 0.46

0.20 5 0.03 0.03 0.04 0.06 0.07 0.12 0.19 0.26 0.82

0.50 2 0.11 0.13 0.14 0.18 0.22 0.32 0.51 0.70 2.31
38

1-0.000-6M KABUL RIVER AT TANG-I-GHARU, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 4.95 6.06 6.93 8.42 0.04 0.12 0.18 0.56

0.10 10 6.79 7.90 8.72 10.1 0.14 0.29 0.44 1.28

0.20 5 9.44 10.5 11.2 12.3 0.50 0.80 1.19 3.06

0.50 2 15.3 16.0 16.5 17.1 3.65 4.24 5.99 11.7

June-July-August September-October-November

0.05 20 0 0.01 0.02 0.03 0.01 0.02 0.03 0.05

0.10 10 0.01 0.03 0.04 0.05 0.03 0.03 0.05 0.07

0.20 5 0.03 0.05 0.07 0.09 0.05 0.06 0.08 0.12

0.50 2 0.14 0.17 0.22 0.29 0.16 0.20 0.23 0.33
39

1-0.000-6M KABUL RIVER AT TANG-I-GHARU, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1960 May 2, 1960 175 1967 April 28, 1967 192

1961 April 18, 1961 98.0 1960 May 2, 1960 175

1962 November 15, 1961 39.5 1963 May 19, 1963 165

1963 May 19, 1963 165 1964 April 10, 1964 158

1964 April 10, 1964 158 1965 April 25, 1965 156

1965 April 25, 1965 156 1976 April 25, 1976 128

1966 April 26, 1966 79.7 1968 April 30, 1968 115

1967 April 28, 1967 192 1978 July 7, 1978 109

1968 April 30, 1968 115 1972 April 28, 1972 107

1969 April 19, 1969 85.5 1973 April 11, 1973 107

1970 July 7, 1970 101 1980 April 19, 1980 107

1971 March 26, 1971 43.6 1970 July 7, 1970 101

1972 April 28, 1972 107 1961 April 18, 1961 98.0

1973 April 11, 1973 107 1969 April 19, 1969 85.5

1974 April 7, 1974 48.2 1966 April 26, 1966 79.7

1975 April 4, 1975 68.8 1979 April 14, 1979 69.5

1976 April 25, 1976 128 1975 April 4, 1975 68.8

1977 April 18, 1977 47.4 1974 April 7, 1974 48.2

1978 July 7, 1978 109 1977 April 18, 1977 47.4

1979 April 14, 1979 69.5 1971 March 26, 1971 43.6

1980 April 19, 1980 107 1962 November 15, 1961 39.5
40

1-0.000-6M KABUL RIVER AT TANG-I-GHARU, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[Data may not be rounded in accordance with U.S. Geological Survey publication standards] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1960 3.65 19.8 22.3 20.9 21.8 26.6 83.1 75.4 18.4 7.22 1.75 1.49 25.2

1961 9.85 24.4 24.6 26.1 25.6 28.2 69.4 41.3 6.89 5.51 1.47 1.07 22.0

1962 6.88 22.2 22.5 23.6 23.5 21.7 28.8 6.22 0.593 0.621 0.337 0.287 13.0

1963 2.33 10.2 19.8 20.4 18.7 17.4 13.5 50.5 4.43 0.386 0.85 0.293 13.3

1964 0.67 11.2 17.6 19.4 19.5 34.8 96.2 21.5 2.80 1.00 0.432 0.351 18.7

1965 1.81 15.3 19.8 18.7 21.9 28.4 89.5 93.1 31.1 13.6 3.86 3.76 28.4

1966 9.62 22.2 26.6 25.4 24.3 26.8 42.2 12.3 2.08 1.15 0.851 1.73 16.2

1967 5.32 16.0 20.2 22.5 23.6 23.7 60.0 74.3 22.8 7.75 2.62 2.04 23.4

1968 9.06 21.7 25.8 27.9 27.0 45.5 56.7 41.8 13.8 1.42 0.494 1.05 22.7

1969 6.51 18.1 26.6 27.9 28.1 32.9 30.9 10.6 2.25 0.335 0.306 0.321 15.3

1970 2.08 17.3 17.4 19.7 18.3 18.0 6.17 0.443 0.154 1.34 0.172 0.035 8.37

1971 0.06 4.26 12.8 15.3 16.7 19.0 11.6 0.697 0.438 0.134 0.13 0.164 6.71

1972 0.21 0.56 6.77 11.5 14.6 29.2 53.5 53.8 6.80 1.84 0.409 0.759 15.0

1973 0.79 8.90 16.5 19.1 18.8 39.1 78.9 17.2 1.29 0.743 0.392 0.235 16.7

1974 1.13 8.43 17.8 21.4 21.3 22.8 22.2 2.09 2.11 0.124 0.013 0.098 9.89

1975 0.20 4.41 10.5 16.9 18.4 24.4 43.6 14.0 1.71 0.253 0.601 0.149 11.2

1976 0.12 5.23 13.5 16.6 18.1 24.8 67.1 35.5 3.16 1.73 0.237 0.197 15.5

1977 0.64 9.83 16.8 21.8 22.8 18.3 20.6 1.26 0.222 0.142 0.149 0.13 9.30

1978 0.18 4.23 10.9 13.7 16.0 18.5 16.5 2.02 0.239 8.71 5.64 0.571 8.08

1979 0.23 4.27 10.2 13.2 13.5 14.4 34.6 12.9 0.289 0.086 3.12 0.212 8.87

1980 0.22 4.19 11.7 15.2 18.0 27.7 82.8 26.7 1.46 0.42 0.101 0.151 15.7
41

1-2.R00-7T HAZARNAW RIVER AT SABAY

(U.S. Geological Survey identification number: 340600070220000)

LOCATION: Lat 34o06'N., long 70o22'E.

DRAINAGE AREA: 120 km2.

ELEVATION: 1,400 meters above mean sea level.

PERIOD OF RECORD: December 26, 1975 to September 30, 1979.

GAGE: Staff gage.

0.00

0.50

1.00

1.50

2.00

2.50

3.00

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
42

1-2.R00-7T HAZARNAW RIVER AT SABAY, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 0.53 1977 0.30 1978 0.43 0.12 0.27 1.58

November 0.50 1977 0.31 1978 0.39 0.10 0.25 1.44

December 0.41 1977 0.28 1979 0.34 0.07 0.20 1.24

January 0.30 1979 0.25 1978 0.28 0.02 0.09 1.03

February 0.35 1977 0.17 1978 0.28 0.08 0.28 1.03

March 0.54 1977 0.36 1976 0.42 0.08 0.20 1.55

April 4.32 1978 2.76 1976 3.58 0.76 0.21 13.2

May 8.17 1978 4.95 1979 6.38 1.44 0.23 23.5

June 9.45 1978 4.93 1977 7.26 2.17 0.30 26.8

July 5.77 1978 1.88 1977 3.91 1.80 0.46 14.4

August 3.22 1979 0.76 1977 2.30 1.12 0.49 8.49

September 2.89 1977 0.91 1978 1.58 0.93 0.59 5.80

Annual 2.72 1978 1.81 1977 2.34 0.47 0.20 100
43

1-2.R00-7T HAZARNAW RIVER AT SABAY, Continued 

Monthly and annual flow duration, in cubic meters per second 

[ng, not given] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 0.27 0.29 0.26 0.20 0.15 0.26 0.67 2.53 3.35 1.24 0.54 0.45 0.26

90 0.29 0.29 0.27 0.23 0.16 0.27 0.82 3.06 3.77 1.53 0.60 0.53 0.27

85 0.29 0.29 0.29 0.25 0.19 0.29 0.98 3.50 4.13 1.85 0.71 0.55 0.29

80 0.30 0.30 0.29 0.26 0.20 0.29 1.27 3.81 4.28 2.07 0.83 0.56 0.30

75 0.30 0.30 0.29 0.26 0.27 0.30 1.96 4.31 4.55 2.49 1.06 0.58 0.32

70 0.30 0.30 0.29 0.27 0.27 0.33 2.22 4.48 4.94 2.64 1.20 0.61 0.37

65 0.43 0.30 0.30 0.27 0.28 0.34 2.49 4.66 5.29 2.80 1.42 0.67 0.42

60 0.43 0.33 0.30 0.27 0.28 0.36 2.67 4.92 6.29 3.00 1.66 0.75 0.46

55 0.44 0.34 0.30 0.28 0.29 0.38 2.82 5.13 6.64 3.24 1.80 0.84 0.50

50 0.44 0.37 0.30 0.29 0.29 0.38 3.24 5.33 7.29 3.50 1.91 0.90 0.56

45 0.44 0.38 0.30 0.29 0.30 0.39 3.50 5.52 7.65 3.67 2.01 0.96 0.80

40 0.49 0.43 0.36 0.30 0.31 0.42 3.77 5.71 7.89 3.83 2.13 1.22 1.41

35 0.53 0.48 0.37 ng 0.32 0.43 4.40 6.16 8.06 4.05 2.25 1.38 1.97

30 0.53 0.48 0.38 ng 0.32 0.44 4.95 6.64 8.23 4.26 2.41 1.43 2.61

25 0.53 0.49 0.39 ng 0.33 0.45 5.33 7.48 8.48 4.45 2.60 1.48 3.49

20 0.54 0.49 ng ng 0.34 0.49 5.61 8.46 8.81 4.81 2.82 1.53 4.34

15 0.54 0.53 ng ng ng 0.61 5.92 9.35 10.00 5.65 3.16 1.63 5.25

10 ng 0.53 ng ng ng 0.66 6.25 10.10 11.60 6.76 4.05 1.83 6.46

5 ng 0.54 ng ng ng 0.81 7.21 11.80 13.90 8.23 4.63 4.54 8.67
44

1-2.R00-7T HAZARNAW RIVER AT SABAY, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 ng ng ng ng ng

0.95 1.05 ng ng ng ng ng

0.90 1.11 ng ng ng ng ng

0.80 1.25 ng ng ng ng ng

0.50 2 ng ng ng ng ng

0.20 5 ng ng ng ng ng

0.10 10 ng ng ng ng ng

0.04 25 ng ng ng ng ng

0.02 50 ng ng ng ng ng

0.01 100 ng ng ng ng ng

0.005 200 ng ng ng ng ng

0.002 500 ng ng ng ng ng

1-2.R00-7T HAZARNAW RIVER AT SABAY, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second; ng, not given] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 ng ng ng ng ng ng ng ng ng

0.10 10 ng ng ng ng ng ng ng ng ng

0.20 5 ng ng ng ng ng ng ng ng ng

0.50 2 ng ng ng ng ng ng ng ng ng
45

1-2.R00-7T HAZARNAW RIVER AT SABAY, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second; ng, not given] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 ng ng ng ng ng ng ng ng

0.10 10 ng ng ng ng ng ng ng ng

0.20 5 ng ng ng ng ng ng ng ng

0.50 2 ng ng ng ng ng ng ng ng

June-July-August September-October-November

0.05 20 ng ng ng ng ng ng ng ng

0.10 10 ng ng ng ng ng ng ng ng

0.20 5 ng ng ng ng ng ng ng ng

0.50 2 ng ng ng ng ng ng ng ng

1-2.R00-7T HAZARNAW RIVER AT SABAY, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1976 July 21, 1976 49.4 1977

September 4, 

1977 110

1977 September 4, 1977 110 1976 July 21, 1976 49.4

1978 July 7, 1978 18.6 1979 August 7, 1979 38.5

1979 August 7, 1979 38.5 1978 July 7, 1978 18.6
46

1-2.R00-7T HAZARNAW RIVER AT SABAY, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[Data may not be rounded in accordance with U.S. Geological Survey publication standards; --, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1976 -- -- -- 0.29 0.28 0.36 2.76 6.88 5.95 2.95 3.05 0.91 --

1977 0.53 0.50 0.41 0.28 0.35 0.54 3.12 5.53 4.93 1.88 0.76 2.89 1.81

1978 0.30 0.31 0.32 0.25 0.17 0.38 4.32 8.17 9.45 5.77 2.19 0.91 2.72

1979 0.47 0.37 0.28 0.30 0.32 0.41 4.12 4.95 8.72 5.03 3.22 1.59 2.48
47

1-4.1R0-1A PECH RIVER AT CHAGHASARAI

(U.S. Geological Survey identification number: 345400071080000)

LOCATION: Lat 34o54'N., long 71o08'E.

DRAINAGE AREA: 3,855 km2.

ELEVATION: 790 meters above mean sea level.

PERIOD OF RECORD: February 23, 1960 to February 28, 1979.

GAGE: Water-stage recorder.

0

10

20

30

40

50

60

70

80

90

100

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
48

1-4.1R0-1A PECH RIVER AT CHAGHASARAI, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 30.1 1970 6.74 1972 14.4 6.30 0.44 2.05

November 23.1 1970 5.94 1972 11.3 4.21 0.37 1.62

December 13.1 1973 4.01 1972 8.59 2.39 0.28 1.22

January 13.2 1973 3.50 1971 7.68 2.19 0.28 1.09

February 16.9 1973 4.24 1971 9.78 3.30 0.34 1.39

March 54.7 1969 11.4 1975 24.9 13.0 0.52 3.55

April 174 1973 42.7 1977 82.7 29.3 0.35 11.8

May 278 1973 75.8 1962 150 42.3 0.28 21.3

June 331 1972 96.4 1971 206 64.5 0.31 29.4

July 219 1965 33.5 1970 118 51.5 0.44 16.9

August 84.5 1968 17.0 1974 46.5 17.6 0.38 6.62

September 33.8 1967 9.17 1971 21.8 6.65 0.31 3.10

Annual 92.4 1973 31.8 1971 58.7 16.4 0.28 100
49

1-4.1R0-1A PECH RIVER AT CHAGHASARAI, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 6.99 5.86 4.16 3.14 5.26 8.39 32.4 64.8 91.4 28.6 16.3 8.93 6.11

90 7.81 6.61 4.92 4.52 5.89 9.26 36.5 77.6 119 36.0 22.5 10.6 7.11

85 8.51 6.95 5.67 5.50 6.39 10.3 40.2 88.3 132 41.9 25.2 12.3 7.97

80 9.05 7.63 6.21 5.98 6.89 11.2 44.9 98.8 142 50.1 28.4 14.0 8.76

75 9.58 8.04 6.77 6.22 7.26 12.5 48.7 106 151 59.5 30.1 16.1 9.67

70 10.1 8.64 7.10 6.38 7.58 13.4 51.8 113 162 71.3 32.9 17.7 10.9

65 10.6 8.98 7.33 6.62 7.81 15.0 54.9 119 170 79.5 34.9 18.7 12.6

60 11.0 9.24 7.60 6.88 8.03 16.3 58.1 125 179 89.1 37.2 19.4 14.6

55 11.5 9.55 7.90 7.14 8.35 18.2 62.2 132 188 99.7 39.3 20.3 17.9

50 12.3 9.94 8.18 7.34 8.73 20.1 67.9 141 198 112 41.3 21.5 21.9

45 12.8 10.5 8.54 7.57 9.10 21.5 76.1 150 214 120 43.3 22.4 27.3

40 13.3 11.2 8.94 7.84 9.55 23.4 82.5 157 226 131 45.9 23.3 34.7

35 14.2 11.9 9.15 8.22 10.1 25.8 90.2 165 237 140 49.0 24.2 43.3

30 15.9 12.5 9.37 8.76 10.7 29.2 97.3 175 252 149 53.1 25.3 58.1

25 17.7 13.3 9.80 9.18 12.0 32.8 106 186 263 160 57.9 26.6 81.2

20 19.3 14.4 10.8 9.58 13.2 35.4 115 198 276 172 63.0 28.3 111

15 21.2 15.3 12.1 9.96 14.1 41.0 126 213 292 189 69.5 31.2 140

10 24.8 17.3 12.9 10.8 15.6 46.3 147 237 309 219 78.7 33.3 173

5 29.0 21.6 13.8 13.0 17.7 55.8 184 263 332 258 94.8 36.0 232
50

1-4.1R0-1A PECH RIVER AT CHAGHASARAI, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 181 139 135 129 117

0.95 1.05 228 176 167 154 140

0.90 1.11 256 198 186 170 154

0.80 1.25 293 225 209 190 172

0.50 2 373 279 256 234 215

0.20 5 465 332 305 285 267

0.10 10 517 359 331 316 300

0.04 25 576 385 357 351 339

0.02 50 616 401 1

374 375 367

0.01 100 652 415 1

388 398 394

0.005 200 686 427 1

401 1420 421

0.002 500 728 ng ng ng ng

1

Data does not fit log-Pearson Type III curve, use with caution.

1-4.1R0-1A PECH RIVER AT CHAGHASARAI, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 2.76 3.01 3.10 3.23 3.59 4.24 4.77 5.30 6.84

0.10 10 3.28 3.53 3.62 3.80 4.22 4.92 5.43 6.01 7.61

0.20 5 4.01 4.24 4.34 4.58 5.07 5.80 6.28 6.94 8.65

0.50 2 5.69 5.90 6.02 6.36 6.94 7.67 8.09 8.87 11.0
51

1-4.1R0-1A PECH RIVER AT CHAGHASARAI, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 2.81 3.15 3.28 3.64 5.19 6.11 7.32 10.3

0.10 10 3.31 3.67 3.84 4.26 5.91 7.04 8.40 11.9

0.20 5 4.02 4.40 4.61 5.10 7.01 8.45 10.0 14.2

0.50 2 5.69 6.06 6.35 6.92 10.1 12.4 14.7 20.9

June-July-August September-October-November

0.05 20 13.9 16.4 17.0 19.1 4.40 5.17 5.58 6.13

0.10 10 16.9 19.5 20.8 23.6 4.99 5.66 6.02 6.72

0.20 5 20.9 23.6 25.9 30.0 5.80 6.37 6.70 7.59

0.50 2 29.0 31.9 36.2 44.5 7.70 8.24 8.61 9.92
52

1-4.1R0-1A PECH RIVER AT CHAGHASARAI, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1961 June 5, 1961 375 1972 June 25, 1972 540

1962 June 12, 1962 240 1978 July 6, 1978 530

1963 May 13, 1963 515 1965 April 18, 1965 525

1964 July 3, 1964 274 1963 May 13, 1963 515

1965 April 18, 1965 525 1967 June 12, 1967 456

1966 June 20, 1966 406 1969 June 18, 1969 445

1967 June 12, 1967 456 1973 June 12, 1973 435

1968 July 8, 1968 366 1966 June 20, 1966 406

1969 June 18, 1969 445 1975 June 16, 1975 387

1970 May 21, 1970 254 1961 June 5, 1961 375

1971 May 23, 1971 352 1968 July 8, 1968 366

1972 June 25, 1972 540 1974 June 5, 1974 362

1973 June 12, 1973 435 1971 May 23, 1971 352

1974 June 5, 1974 362 1979 June 23, 1979 326

1975 June 16, 1975 387 1977 May 25, 1977 315

1976 May 23, 1976 291 1976 May 23, 1976 291

1977 May 25, 1977 315 1964 July 3, 1964 274

1978 July 6, 1978 530 1970 May 21, 1970 254

1979 June 23, 1979 326 1962 June 12, 1962 240

1980 June 11, 1980 213 1980 June 11, 1980 213
53

1-4.1R0-1A PECH RIVER AT CHAGHASARAI, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[--, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1960 -- -- -- -- -- 33.3 85.8 92.3 166 168 64.5 18.3 --

1961 10.5 13.5 8.18 6.46 8.49 15.4 58.4 124 179 85.5 41.5 30.7 48.5

1962 10.0 12.3 9.74 8.03 8.96 12.4 55.9 75.8 129 68.2 32.5 19.0 36.9

1963 22.1 15.1 7.97 6.58 7.86 27.0 74.9 145 216 124 53.3 20.5 60.2

1964 11.8 9.30 11.8 7.79 8.94 18.7 71.6 129 175 112 52.4 18.6 52.3

1965 10.2 8.47 9.03 8.26 9.18 21.7 93.0 166 272 219 61.2 26.9 75.7

1966 13.0 9.24 9.02 9.26 14.1 37.8 105 153 223 142 63.8 32.5 67.8

1967 24.6 15.9 8.37 6.17 7.89 18.4 77.9 149 246 161 56.1 33.8 67.4

1968 21.3 16.0 10.5 9.64 15.3 39.6 100 153 259 204 84.5 25.1 78.2

1969 19.6 13.8 12.6 10.2 13.5 54.7 102 163 290 145 52.1 24.3 75.2

1970 30.1 23.1 10.4 9.49 8.73 17.4 63.7 137 120 33.5 31.4 18.9 42.1

1971 9.32 6.44 4.73 3.50 4.24 14.5 46.1 127 96.4 38.2 19.4 9.17 31.8

1972 6.74 5.94 4.01 4.57 12.7 39.5 105 196 331 123 32.6 20.7 73.4

1973 15.1 13.2 13.1 13.2 16.9 46.1 174 278 306 151 60.1 20.1 92.4

1974 13.1 8.78 7.71 6.24 8.39 19.7 64.6 142 174 67.5 17.0 10.3 45.0

1975 8.60 7.85 6.84 6.85 6.15 11.4 87.2 138 213 112 55.4 27.7 56.8

1976 16.2 9.46 7.71 6.56 10.5 15.0 73.8 159 165 116 43.1 21.4 53.7

1977 10.4 8.24 6.60 7.59 7.60 18.3 42.7 125 171 57.9 25.0 15.6 41.5

1978 10.4 9.23 7.98 9.02 6.44 12.4 89.1 191 188 119 37.4 19.7 58.5

1979 10.8 9.54 7.00 6.60 9.90 -- -- -- -- -- -- -- --
54

1-4.2R0-1A LANDAISIN RIVER NEAR GAWARDESH

(U.S. Geological Survey identification number: 352300071320000)

LOCATION: Lat 35o23'N., long 71o32'E.

DRAINAGE AREA: 3,130 km2

.

ELEVATION: 1,135 meters above mean sea level.

PERIOD OF RECORD: May 1, 1975 to July 22, 1978.

GAGE: Water-stage recorder. Staff gage at same site and datum prior to 1976 water year.

0

10

20

30

40

50

60

70

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
55

1-4.2R0-1A LANDAISIN RIVER NEAR GAWARDESH, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 23.6 1976 21.8 1978 23.0 1.01 0.04 3.38

November 16.4 1977 15.6 1978 16.1 0.44 0.03 2.37

December 13.0 1977 11.4 1978 12.4 0.87 0.07 1.83

January 12.1 1976 9.7 1978 11.0 1.21 0.11 1.61

February 11.9 1976 10.3 1978 10.9 0.90 0.08 1.60

March 19.7 1977 14.1 1976 16.4 2.93 0.18 2.41

April 53.4 1976 44.4 1977 49.8 4.76 0.10 7.33

May 169 1975 80.0 1977 124 36.4 0.29 18.2

June 175 1978 150 1977 162 11.9 0.07 23.9

July 144 1976 112 1977 129 16.0 0.12 19.0

August 99.0 1975 69.9 1977 82.5 15.0 0.18 12.1

September 47.2 1975 35.5 1977 43.0 6.49 0.15 6.33

Annual 57.4 1976 49.0 1977 53.2 5.94 0.11 100
56

1-4.2R0-1A LANDAISIN RIVER NEAR GAWARDESH, Continued 

Monthly and annual flow duration, in cubic meters per second 

[ng, not given] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 18.6 13.5 10.5 9.33 9.33 11.7 16.6 51.2 121 82.5 55.3 29.6 11.1

90 19.3 14.2 11.1 9.36 9.37 12.0 19.1 62.0 130 90.8 62.5 30.3 11.8

85 19.5 14.3 11.2 9.39 9.84 12.7 23.6 68.6 136 93.3 67.2 31.1 12.4

80 20.0 14.9 11.6 9.90 9.86 13.2 33.4 75.7 141 99.0 68.2 31.8 12.9

75 20.6 15.0 11.7 9.94 9.89 13.4 34.8 88.1 147 109 69.2 32.5 13.4

70 20.9 15.1 12.1 10.5 9.91 14.1 36.9 104 152 114 71.3 34.0 14.4

65 21.7 15.5 12.1 10.6 10.5 14.3 39.5 113 156 118 73.9 35.1 16.1

60 21.8 15.6 12.2 10.6 10.6 14.5 40.5 120 161 122 76.5 36.1 18.6

55 22.3 15.7 12.2 11.0 10.6 14.7 41.3 125 163 127 78.8 38.6 23.0

50 22.5 15.7 12.7 11.1 11.0 14.9 42.1 129 167 133 81.2 41.1 28.6

45 23.4 16.0 12.8 11.1 11.1 15.6 47.1 133 169 137 82.3 44.8 34.9

40 23.6 16.5 12.8 11.7 11.1 15.8 51.8 138 170 140 83.5 46.9 43.5

35 24.1 17.0 12.8 11.7 11.6 16.0 53.9 142 172 143 84.7 47.5 55.6

30 24.3 17.2 12.9 ng 11.6 16.2 57.5 145 176 147 86.2 48.3 69.5

25 24.9 17.6 12.9 ng 11.7 16.5 62.3 150 179 151 89.9 50.4 80.8

20 25.1 17.8 13.5 ng 11.7 17.9 67.1 155 183 155 91.3 52.3 98.2

15 25.9 17.9 13.5 ng 12.2 19.5 79.4 160 190 158 98.2 56.0 125

10 27.5 18.4 ng ng 12.3 21.8 88.4 166 194 162 106 61.5 141

5 29.1 18.5 ng ng ng 29.3 98.9 175 198 173 130 63.8 159
57

1-4.2R0-1A LANDAISIN RIVER NEAR GAWARDESH, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 ng ng ng ng ng

0.95 1.05 ng ng ng ng ng

0.90 1.11 ng ng ng ng ng

0.80 1.25 ng ng ng ng ng

0.50 2 ng ng ng ng ng

0.20 5 ng ng ng ng ng

0.10 10 ng ng ng ng ng

0.04 25 ng ng ng ng ng

0.02 50 ng ng ng ng ng

0.01 100 ng ng ng ng ng

0.005 200 ng ng ng ng ng

0.002 500 ng ng ng ng ng

1-4.2R0-1A LANDAISIN RIVER NEAR GAWARDESH, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second; ng, not given] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 ng ng ng ng ng ng ng ng ng

0.10 10 ng ng ng ng ng ng ng ng ng

0.20 5 ng ng ng ng ng ng ng ng ng

0.50 2 ng ng ng ng ng ng ng ng ng
58

1-4.2R0-1A LANDAISIN RIVER NEAR GAWARDESH, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second; ng, not given] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 ng ng ng ng ng ng ng ng

0.10 10 ng ng ng ng ng ng ng ng

0.20 5 ng ng ng ng ng ng ng ng

0.50 2 ng ng ng ng ng ng ng ng

June-July-August September-October-November

0.05 20 ng ng ng ng ng ng ng ng

0.10 10 ng ng ng ng ng ng ng ng

0.20 5 ng ng ng ng ng ng ng ng

0.50 2 ng ng ng ng ng ng ng ng

1-4.2R0-1A LANDAISIN RIVER NEAR GAWARDESH, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1975 May 15, 1975 342 1975 May 15, 1975 342

1976 June 4, 1976 222 1977 June 22, 1977 272

1977 June 22, 1977 272 1978 June 6, 1978 236

1978 June 6, 1978 236 1976 June 4, 1976 222
59

1-4.2R0-1A LANDAISIN RIVER NEAR GAWARDESH, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[Data may not be rounded in accordance with U.S. Geological Survey publication standards; --, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1975 -- -- -- -- -- -- -- 169 169 130 99.0 47.2 --

1976 23.6 16.3 12.8 12.1 11.9 14.1 53.4 120 154 144 78.5 46.2 57.4

1977 23.5 16.4 13.0 11.1 10.4 19.7 44.4 80.0 150 112 69.9 35.5 49.0

1978 21.8 15.6 11.4 9.69 10.3 15.4 51.6 125 175 -- -- -- --
60

1-4.L00-1A KONAR RIVER AT PUL-I-KAMA

(U.S. Geological Survey identification number: 342800070330000)

LOCATION: Lat 34o28'N., long 70o33'E.

DRAINAGE AREA: 26,005 km2

.

ELEVATION: 555 meters above mean sea level.

PERIOD OF RECORD: December 28, 1966 to September 30, 1979.

GAGE: Water-stage recorder.

0

100

200

300

400

500

600

700

800

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
61

1-4.L00-1A KONAR RIVER AT PUL-I-KAMA, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 249 1979 177 1975 223 22.3 0.10 3.92

November 195 1972 113 1975 164 26.77 0.16 2.88

December 173 1970 88.2 1975 131 22.3 0.17 2.30

January 147 1970 74.8 1975 109 16.4 0.15 1.92

February 131 1970 60.2 1975 103 18.1 0.18 1.81

March 205 1969 65.0 1975 136 38.6 0.28 2.40

April 776 1973 223 1971 378 146 0.39 6.64

May 1,380 1973 408 1977 657 236 0.36 11.6

June 1,360 1968 800 1970 1,055 204 0.19 18.5

July 1,690 1973 883 1970 1,243 246 0.20 21.8

August 1,280 1973 786 1974 1,010 143 0.14 17.7

September 690 1973 335 1977 481 111 0.23 8.46

Annual 681 1973 385 1971 473 84.4 0.18 100
62

1-4.L00-1A KONAR RIVER AT PUL-I-KAMA, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 158 115 90.3 76.1 65.9 70.1 151 295 627 767 628 257 89.6 

90 176 123 105 88.4 82.0 82.2 171 355 681 898 659 278 102 

85 186 130 109 89.8 90.5 92.4 180 398 719 967 701 302 110 

80 193 137 110 99.2 92.0 101 193 433 786 1,020 755 321 119 

75 198 143 112 100 93.5 105 212 464 833 1,060 814 346 130 

70 202 149 115 101 95.6 109 232 489 874 1,100 870 375 144 

65 205 153 120 106 97.6 112 245 515 902 1,120 918 400 161 

60 209 158 124 107 98.6 116 258 547 929 1,150 966 418 184 

55 213 160 129 108 100 119 280 574 978 1,170 1,010 439 209 

50 218 166 132 109 101 123 308 604 1,010 1,200 1,030 458 243 

45 222 172 134 110 103 128 329 637 1,050 1,230 1,060 472 304 

40 226 175 137 111 106 133 360 667 1,090 1,260 1,080 488 413 

35 230 181 139 114 108 138 391 696 1,130 1,310 1,100 507 517 

30 237 185 141 116 110 143 426 726 1,180 1,350 1,120 536 643 

25 244 190 148 119 113 150 477 759 1,240 1,410 1,160 570 753 

20 251 193 151 122 117 160 535 805 1,340 1,470 1,200 638 907 

15 262 197 156 128 126 174 622 891 1,420 1,590 1,270 686 1,040 

10 279 202 163 132 131 206 734 1,010 1,520 1,670 1,330 730 1,170 

5 307 207 178 146 135 246 867 1,380 1,660 1,800 1,460 789 1,360 
63

1-4.L00-1A KONAR RIVER AT PUL-I-KAMA, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 1,110 1,000 984 949 919

0.95 1.05 1,240 1,110 1,080 1,030 982

0.90 1.11 1,320 1,180 1,140 1,080 1,020

0.80 1.25 1,430 1,270 1,230 1,150 1,090

0.50 2 1,680 1,500 1,430 1,330 1,240

0.20 5 2,020 1,820 1,720 1,590 1,470

0.10 10 2,240 2,040 1,910 1,760 1,630

0.04 25 2,510 2,310 2,160 1,990 1,830

0.02 50 2,710 2,520 2,350 2,160 1,990

0.01 100 2,910 2,730 2,540 2,340 2,160

0.005 200 3,110 2,950 2,730 2,520 2,330

0.002 500 3,380 ng ng ng ng

1-4.L00-1A KONAR RIVER AT PUL-I-KAMA, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 51.8 52.0 55.6 58.4 63.9 68.8 74.6 80.6 106

0.10 10 59.6 60.5 64.6 67.3 72.7 77.7 83.4 89.9 117

0.20 5 69.3 70.9 75.4 78.1 83.2 88.3 93.8 101 129

0.50 2 87.4 90.3 94.4 97.0 101 106 111 119 149
64

1-4.L00-1A KONAR RIVER AT PUL-I-KAMA, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 51.7 59.0 63.6 68.6 58.3 60.3 65.5 75.5

0.10 10 60.0 67.7 72.2 76.6 67.9 70.9 76.2 87.3

0.20 5 70.3 78.1 82.3 86.1 79.4 83.5 89.2 103

0.50 2 89.5 95.9 99.4 102 99.3 105 112 134

June-July-August September-October-November

0.05 20 465 515 606 741 93.7 102 106 117

0.10 10 491 549 640 786 102 113 117 128

0.20 5 523 591 684 844 114 126 131 141

0.50 2 589 672 781 963 136 150 155 166

1-4.L00-1A KONAR RIVER AT PUL-I-KAMA, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1967 July 24, 1967 1,706 1973 July 18, 1973 2,350

1968 July 9, 1968 1,800 1975 May 16, 1975 2,342

1969 July 24, 1969 1,325 1978 July 8, 1978 2,200

1970 July 17, 1970 1,490 1979 July 7, 1979 1,900

1971 July 29, 1971 1,312 1968 July 9, 1968 1,800

1972 June 19, 1972 1,700 1967 July 24, 1967 1,706

1973 July 18, 1973 2,350 1972 June 19, 1972 1,700

1974 July 17, 1974 1,680 1974 July 17, 1974 1,680

1975 May 16, 1975 2,342 1970 July 17, 1970 1,490

1976 July 10, 1976 1,382 1977 June 25, 1977 1,414

1977 June 25, 1977 1,414 1976 July 10, 1976 1,382

1978 July 8, 1978 2,200 1969 July 24, 1969 1,325

1979 July 7, 1979 1,900 1971 July 29, 1971 1,312
65

1-4.L00-1A KONAR RIVER AT PUL-I-KAMA, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[Data may not be rounded in accordance with U.S. Geological Survey publication standards; --, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1967 -- -- -- 111 109 134 351 587 1,170 1,460 1,100 603 --

1968 233 189 140 115 127 176 493 745 1,360 1,380 1,090 457 544

1969 235 164 131 102 93.8 205 408 535 1,030 1,140 980 494 462

1970 246 189 173 147 131 150 345 611 800 883 1,070 588 447

1971 203 123 110 99.7 93.8 115 223 539 930 923 839 402 385

1972 213 195 147 108 96.9 129 247 630 1,340 1,320 1,110 615 514

1973 241 158 138 114 116 198 776 1,380 1,350 1,690 1,280 690 681

1974 244 167 127 95.2 88.6 104 248 471 894 1,090 786 337 390

1975 177 113 88.2 74.8 60.2 65 343 717 1,120 1,080 1,050 424 445

1976 219 183 142 118 112 119 357 632 829 1,110 794 420 421

1977 217 151 120 109 100 123 265 408 835 1,160 908 335 396

1978 199 147 109 106 104 115 377 612 953 1,310 1,040 472 465

1979 249 187 148 121 106 141 481 679 1,100 1,610 1,080 422 531
66

`

1-4.L00-2T KONAR RIVER NEAR KONARI

(U.S. Geological Survey identification number: 343800070490000)

LOCATION: Lat 34o38'N., long 70o49'E.

DRAINAGE AREA: 24,895 km2.

ELEVATION: 665 meters above mean sea level.

PERIOD OF RECORD: October 1, 1959 to September 30, 1967.

GAGE: Water-stage recorder.

0

100

200

300

400

500

600

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
67

1-4.L00-2T KONAR RIVER NEAR KONARI, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 293 1960 175 1966 222 44.6 0.20 4.39

November 227 1960 133 1965 159 32.1 0.20 3.15

December 203 1960 116 1966 139 27.8 0.20 2.75

January 181 1960 103 1966 128 23.8 0.19 2.53

February 185 1960 100 1966 126 25.6 0.20 2.50

March 227 1960 122 1962 153 35.7 0.23 3.04

April 440 1965 197 1962 331 81.4 0.25 6.54

May 783 1965 289 1962 547 139 0.25 10.8

June 1,270 1967 597 1962 918 219 0.24 18.2

July 1,400 1967 745 1962 1,030 203 0.20 20.5

August 1,090 1967 672 1961 822 147 0.18 16.3

September 589 1961 393 1965 472 74.1 0.16 9.35

Annual 515 1967 320 1962 423 64.0 0.15 100
68

1-4.L00-2T KONAR RIVER NEAR KONARI, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 152 130 114 101 98.2 116 154 251 499 696 563 278 115

90 157 131 118 109 102 117 162 334 607 760 613 296 119

85 161 133 121 113 112 118 174 403 677 795 628 321 124

80 166 134 124 116 114 120 191 428 708 840 646 350 130

75 172 136 125 117 116 122 215 450 732 887 666 363 136

70 181 138 126 118 117 125 238 471 757 916 697 377 145

65 191 140 127 119 118 129 254 492 788 949 721 395 159

60 198 142 128 120 119 132 264 508 830 974 738 423 184

55 204 145 129 121 120 135 283 521 869 996 769 444 209

50 209 148 130 122 120 137 294 533 901 1,020 789 462 246

45 214 151 131 122 121 141 310 553 929 1,040 806 488 303

40 223 153 133 123 121 144 330 572 958 1,070 836 509 398

35 229 158 135 124 122 146 351 591 990 1,100 866 525 494

30 237 164 138 126 123 151 372 612 1,020 1,140 900 538 571

25 251 174 143 129 130 158 406 639 1,050 1,180 944 562 659

20 264 186 150 138 133 185 447 682 1,100 1,230 990 603 748

15 277 194 157 142 136 219 493 723 1,150 1,300 1060 632 850

10 300 213 198 175 180 228 544 768 1,370 1,330 1,120 668 978

5 364 229 206 184 188 250 621 823 1,490 1,420 1,190 722 1,130
69

1-4.L00-2T KONAR RIVER NEAR KONARI, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge1 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 836 679 677 2657 672

0.95 1.05 975 822 805 783 772

0.90 1.11 1,060 905 880 855 830

0.80 1.25 1,160 1,010 976 948 905

0.50 2 1,380 1,230 1,180 1,140 1,070

0.20 5 1,620 1,460 1,400 1,350 1,250

0.10 10 1,760 1,580 1,520 1,460 1,350

0.04 25 1,910 1,710 1,660 1,580 1,480

0.02 50 2,010 1,800 1,750 1,660 1,560

0.01 100 2,110 1,880 1,840 1,740 1,640

0.005 200 2,200 1,950 1,910 1,810 1,710

0.002 500 2,310 ng ng ng ng

1

Less than 10 years of data used.

2

Data does not fit log-Pearson Type III curve, use with caution.

1-4.L00-2T KONAR RIVER NEAR KONARI, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 95.4 96 97.3 97.9 99.2 101 106 111 131

0.10 10 101 101 102 102 104 105 109 114 133

0.20 5 106 107 107 108 109 110 113 117 136

0.50 2 116 117 117 117 118 119 120 123 144
70

1-4.L00-2T KONAR RIVER NEAR KONARI, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 97.8 99.6 100 101 104 111 113 115

0.10 10 100 102 102 103 105 111 114 119

0.20 5 105 106 106 107 108 113 115 124

0.50 2 117 117 118 118 117 121 124 142

June-July-August September-October-November

0.05 20 304 361 482 585 102 124 125 129

0.10 10 361 410 515 617 110 125 127 131

0.20 5 430 472 560 662 119 128 130 135

0.50 2 549 595 664 767 136 136 138 145

1-4.L00-2T KONAR RIVER NEAR KONARI, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1960 July 11, 1960 1,490 1967 June 12, 1967 1,820

1961 July 16, 1961 1,410 1966 June 20, 1966 1,670

1962 July 22, 1962 998 1960 July 11, 1960 1,490

1963 June 28, 1963 1,110 1961 July 16, 1961 1,410

1964 July 29, 1964 1,280 1965 May 22, 1965 1,348

1965 May 22, 1965 1,348 1964 July 29, 1964 1,280

1966 June 20, 1966 1,670 1963 June 28, 1963 1,110

1967 June 12, 1967 1,820 1962 July 22, 1962 998
71

1-4.L00-2T KONAR RIVER NEAR KONARI, Continued 

Monthly and annual mean discharges, in cubic meters per second 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1960 293 227 203 181 185 227 368 618 878 1,180 969 506 488

1961 256 183 150 139 134 143 292 518 824 1,010 672 589 411

1962 259 140 127 122 119 122 197 289 597 745 708 400 320

1963 189 151 132 124 121 143 274 547 868 890 805 405 389

1964 188 139 123 114 113 130 300 469 729 884 740 464 367

1965 180 133 126 119 119 136 440 783 1,070 1,090 713 393 443

1966 175 137 116 103 100 188 427 576 1,110 1,070 882 463 447

1967 233 163 133 120 118 138 346 578 1,270 1,400 1,090 559 515
72

1-4.L00-3A KONAR RIVER AT NAWABAD

(U.S. Geological Survey identification number: 344900071070000)

LOCATION: Lat 34o49'N., long 71o07'E.

DRAINAGE AREA: 23,960 km2.

ELEVATION: 798 meters above mean sea level.

PERIOD OF RECORD: April 1, 1976 to September 30, 1979.

GAGE: Water-stage recorder.

0

100

200

300

400

500

600

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
73

1-4.L00-3A KONAR RIVER AT NAWABAD, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 256 1979 203 1978 226 27.3 0.12 4.23

November 185 1979 142 1978 159 22.7 0.14 2.98

December 144 1979 109 1978 124 18.0 0.15 2.32

January 114 1979 87.0 1978 103 14.2 0.14 1.93

February 102 1979 90.0 1978 94.2 6.76 0.07 1.76

March 137 1979 123 1977 131 7.21 0.06 2.45

April 468 1979 236 1977 349 100 0.29 6.53

May 674 1979 423 1977 593 115 0.19 11.1

June 1,100 1979 785 1976 927 135 0.15 17.4

July 1,620 1979 1,050 1976 1,280 260 0.20 23.9

August 1,090 1979 746 1976 935 159 0.17 17.5

September 489 1978 382 1977 426 46.2 0.11 7.98

Annual 530 1979 393 1977 462 68.5 0.15 100
74

1-4.L00-3A KONAR RIVER AT NAWABAD, Continued 

Monthly and annual flow duration, in cubic meters per second 

[ng, not given] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 154 130 96.6 84.1 83.6 91.3 158 253 497 912 582 287 89.3 

90 166 136 99.2 85.3 85.3 101 182 326 610 984 627 297 96.4 

85 172 138 107 86.0 86.7 106 214 365 647 1,020 663 308 107 

80 176 139 110 86.9 87.7 110 219 450 673 1,070 726 318 117 

75 179 142 113 89.2 88.5 115 225 465 700 1,100 765 327 127 

70 187 144 115 91.0 89.1 117 235 493 733 1,110 803 353 138 

65 192 146 116 94.7 89.5 120 242 528 784 1,130 837 366 153 

60 198 151 117 96.5 89.9 123 252 558 814 1,140 858 387 173 

55 201 158 119 100 90.2 124 268 575 833 1,160 880 403 196 

50 205 159 121 101 90.6 126 288 599 852 1,180 912 412 237 

45 214 161 125 103 91.6 130 296 631 873 1,200 942 442 296 

40 226 167 129 107 92.8 132 303 663 910 1,220 967 462 376 

35 235 172 131 109 93.6 134 340 686 965 1,250 1,020 481 482 

30 244 174 136 111 94.3 137 382 700 1,020 1,330 1,060 493 582 

25 254 179 140 116 95.6 141 468 714 1,100 1,460 1,090 504 695 

20 266 181 141 120 97.8 145 518 738 1,160 1,610 1,120 515 853 

15 287 189 145 121 103 153 579 763 1,220 1,690 1,170 534 1,030 

10 293 191 147 122 106 159 628 785 1,360 1,760 1,230 561 1,150 

5 388 193 ng 126 111 191 732 875 1,690 1,890 1,430 612 1,390 
75

1-4.L00-3A KONAR RIVER AT NAWABAD, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 ng ng ng ng ng

0.95 1.05 ng ng ng ng ng

0.90 1.11 ng ng ng ng ng

0.80 1.25 ng ng ng ng ng

0.50 2 ng ng ng ng ng

0.20 5 ng ng ng ng ng

0.10 10 ng ng ng ng ng

0.04 25 ng ng ng ng ng

0.02 50 ng ng ng ng ng

0.01 100 ng ng ng ng ng

0.005 200 ng ng ng ng ng

0.002 500 ng ng ng ng ng

1-4.L00-3A KONAR RIVER AT NAWABAD, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second; ng, not given] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 ng ng ng ng ng ng ng ng ng

0.10 10 ng ng ng ng ng ng ng ng ng

0.20 5 ng ng ng ng ng ng ng ng ng

0.50 2 ng ng ng ng ng ng ng ng ng
76

1-4.L00-3A KONAR RIVER AT NAWABAD, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second; ng, not given] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 ng ng ng ng ng ng ng ng

0.10 10 ng ng ng ng ng ng ng ng

0.20 5 ng ng ng ng ng ng ng ng

0.50 2 ng ng ng ng ng ng ng ng

June-July-August September-October-November

0.05 20 ng ng ng ng ng ng ng ng

0.10 10 ng ng ng ng ng ng ng ng

0.20 5 ng ng ng ng ng ng ng ng

0.50 2 ng ng ng ng ng ng ng ng

1-4.L00-3A KONAR RIVER AT NAWABAD, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1976 July 21, 1976 1,190 1978 July 8, 1978 2,000

1977 June 24, 1977 1,394 1979 July 8, 1979 1,900

1978 July 8, 1978 2,000 1977 June 24, 1977 1,394

1979 July 8, 1979 1,900 1976 July 21, 1976 1,190
77

1-4.L00-3A KONAR RIVER AT NAWABAD, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[Data may not be rounded in accordance with U.S. Geological Survey publication standards; --, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1976 -- -- -- -- -- -- 386 654 785 1,050 746 404 --

1977 218 151 119 108 90.6 123 236 423 867 1,100 863 382 393

1978 203 142 109 87.0 90.0 133 306 619 954 1,330 1,040 489 462

1979 256 185 144 114 102 137 468 674 1,100 1,620 1,090 430 530
78

1-4.L00-4T KONAR RIVER NEAR ASMAR

(U.S. Geological Survey identification number: 345300071100000)

LOCATION: Lat 34o53'N., long 71o10'E.

DRAINAGE AREA: 19,960 km2

.

ELEVATION: 795 meters above mean sea level.

PERIOD OF RECORD: February 23, 1960 to September 30, 1971.

GAGE: Water-stage recorder.

0

50

100

150

200

250

300

350

400

450

500

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
79

1-4.L00-4T KONAR RIVER NEAR ASMAR, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 251 1961 144 1963 194 35.2 0.18 4.38

November 176 1970 107 1964 135 26.9 0.20 3.06

December 161 1970 88.9 1964 112 21.2 0.19 2.53

January 137 1970 75.4 1966 97.7 16.2 0.17 2.21

February 123 1970 75.6 1966 89.7 13.0 0.14 2.03

March 167 1960 95.3 1963 121 22.2 0.18 2.73

April 373 1968 157 1962 263 65.7 0.25 5.96

May 593 1965 236 1962 437 94.4 0.22 9.88

June 1070 1968 503 1962 760 158 0.21 17.2

July 1200 1967 674 1962 925 155 0.17 20.9

August 1040 1970 644 1962 831 144 0.17 18.8

September 583 1961 361 1963 454 79.4 0.18 10.3

Annual 452 1968 277 1962 367 53.2 0.14 100
80

1-4.L00-4T KONAR RIVER NEAR ASMAR, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 120 103 85.9 76.7 71.5 82.4 114 204 448 629 579 245 84.9

90 129 108 88.4 82.5 76.4 85.2 133 259 523 684 621 264 90.0

85 138 110 90.8 84.3 80.4 89.2 143 304 568 709 639 292 95.1

80 145 111 93.1 85.2 81.2 91.5 149 327 599 758 665 314 102

75 155 113 97.0 86.2 82.1 93.4 165 347 623 798 685 341 109

70 165 114 100 87.3 82.9 95.3 183 368 644 825 701 357 118

65 170 116 102 88.7 83.7 97.7 195 384 669 852 719 376 131

60 178 117 104 90.6 84.5 100 206 398 695 874 739 399 148

55 184 119 104 93.3 85.6 103 221 409 712 894 759 420 174

50 190 127 105 95.2 86.8 105 236 422 732 913 782 438 208

45 199 133 109 96.1 87.9 113 250 444 756 941 806 462 253

40 205 138 114 97.1 89.0 123 268 470 784 966 835 479 326

35 209 143 117 98.5 90.7 128 280 489 817 990 883 492 407

30 214 151 118 101 92.3 133 294 507 854 1,020 938 509 502

25 222 158 123 106 94.1 138 312 534 885 1,050 990 527 598

20 229 166 125 113 96.8 147 359 551 916 1,090 1,040 551 679

15 239 179 130 114 99.9 157 397 577 972 1,120 1,080 614 761

10 267 182 140 119 104 173 470 616 1,090 1,180 1,120 677 881

5 297 187 160 0.05 119 205 500 677 1,180 1,270 1,170 739 1,050
81

1-4.L00-4T KONAR RIVER NEAR ASMAR, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 766 650 642 638 620

0.95 1.05 876 771 755 742 712

0.90 1.11 939 841 820 801 764

0.80 1.25 1,020 930 903 875 831

0.50 2 1,180 1,110 1,080 1,030 967

0.20 5 1,350 1,310 1,260 1,190 1,110

0.10 10 1,450 1,410 1,370 1,280 1,200

0.04 25 1,550 1,530 1,480 1,370 1,290

0.02 50 1,620 1,600 1,560 1,430 1,350

0.01 100 1,680 1,670 1,630 1,490 1,400

0.005 200 1,740 1,730 1,700 1,540 1,450

0.002 500 1,820 ng ng ng ng

1-4.L00-4T KONAR RIVER NEAR ASMAR, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 32.1 61.5 66.9 69.1 74.6 77.9 81.6 85.4 99.8

0.10 10 43.1 65.0 69.4 71.3 75.8 79.1 83.2 87.2 104

0.20 5 57.8 69.9 73.0 74.5 77.8 81.1 85.6 90.0 110

0.50 2 84.4 81.1 82.1 82.9 84.4 87.8 92.9 98.1 123
82

1-4.L00-4T KONAR RIVER NEAR ASMAR, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 32.6 68.3 71.4 76.0 63.7 71.8 84.0 88.8

0.10 10 44.1 70.5 73.1 77.2 68.5 74.6 85.1 93.7

0.20 5 59.2 73.7 75.9 79.2 74.8 78.9 87.3 100

0.50 2 85.7 82.2 83.5 85.6 88.4 91.0 95.5 116

June-July-August September-October-November

0.05 20 275 322 413 516 92.0 92.8 95.8 98.8

0.10 10 329 377 460 558 96.8 97.8 100 105

0.20 5 394 446 518 613 103 104 107 113

0.50 2 504 567 632 726 116 119 123 131

1-4.L00-4T KONAR RIVER NEAR ASMAR, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1960 July 11, 1960 1,230 1967 July 24, 1967 1,530

1961 July 16, 1961 1,180 1968 July 10, 1968 1,472

1962 July 26, 1962 876 1970 July 3, 1970 1,290

1963 July 12, 1963 926 1966 June 20, 1966 1,263

1964 July 13, 1964 976 1960 July 11, 1960 1,230

1965 July 27, 1965 1,165 1969 August 12, 1969 1,196

1966 June 20, 1966 1,263 1961 July 16, 1961 1,180

1967 July 24, 1967 1,530 1965 July 27, 1965 1,165

1968 July 10, 1968 1,472 1971 July 14, 1971 1,130

1969 August 12, 1969 1,196 1964 July 13, 1964 976

1970 July 3, 1970 1,290 1963 July 12, 1963 926

1971 July 14, 1971 1,130 1962 July 26, 1962 876
83

1-4.L00-4T KONAR RIVER NEAR ASMAR, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[--, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1960 -- -- -- -- -- 167 338 528 739 1,010 858 473 --

1961 251 158 117 101 100 117 245 418 654 885 736 583 365

1962 217 116 102 95.7 92.9 95.9 157 236 503 674 644 369 277

1963 144 109 93.2 86.3 86.0 95.3 186 424 710 798 700 361 318

1964 144 107 88.9 84.2 84.0 123 244 347 544 767 699 432 306

1965 153 110 104 94.0 85.1 99.1 312 593 850 937 681 372 368

1966 175 122 88.9 75.4 75.6 147 295 442 883 929 827 430 376

1967 208 146 119 113 91.1 110 270 462 887 1,200 1,030 569 436

1968 208 175 130 97.5 81.1 124 373 535 1,070 1,180 1,010 434 452

1969 220 153 120 94.2 79.0 133 285 373 767 988 932 461 386

1970 216 176 161 137 123 136 279 473 682 849 1,040 562 405

1971 193 116 105 96.3 88.8 102 175 410 836 885 816 396 353
84

1-5.R00-1A SURKHRUD RIVER AT SULTANPUR

(U.S. Geological Survey identification number: 342500070180000)

LOCATION: Lat 34o25'N., long 70o18'E.

DRAINAGE AREA: 2,590 km2

.

ELEVATION: 700 meters above mean sea level.

PERIOD OF RECORD: March 8, 1968 to September 30, 1975 and January 15, 1976 to

March 31, 1980.

GAGE: Water-stage recorder.

0.00

1.00

2.00

3.00

4.00

5.00

6.00

7.00

8.00

9.00

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
85

1-5.R00-1A SURKHRUD RIVER NEAR SULTANPUR, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second; ng, not given] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 1.33 1969 0.01 1972 0.49 0.39 0.79 1.40

November 2.71 1970 0.07 1972 0.82 0.9 1.09 2.36

December 3.13 1969 0.09 1972 1.09 1.04 0.95 3.12

January 2.01 1973 0.18 1971 0.89 0.65 0.74 2.54

February 2.47 1979 0.15 1974 1.18 0.87 0.74 3.38

March 8.16 1973 0.18 1971 1.92 2.25 1.17 5.51

April 22.6 1973 0.35 1974 7.23 6.62 0.92 20.7

May 27.5 1972 0.14 1971 11.0 11.4 1.04 31.6

June 24.1 1973 0 1971 6.63 8.38 1.27 19.0

July 8.98 1973 0 ng 1.83 2.57 1.41 5.24

August 5.50 1975 0 ng 1.33 1.88 1.41 3.81

September 1.35 1972 0 ng 0.48 0.47 0.98 1.38

Annual 8.41 1973 0.15 1971 2.70 2.72 1.01 100
86

1-5.R00-1A SURKHRUD RIVER NEAR SULTANPUR, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 0 0.09 0.09 0.09 0.13 0.14 0.20 0 0 0 0 0 0

90 0.02 0.12 0.16 0.18 0.18 0.18 0.26 0.12 0.01 0 0 0 0

85 0.10 0.16 0.18 0.19 0.20 0.19 0.34 0.17 0.07 0 0 0 0.05

80 0.13 0.18 0.18 0.21 0.25 0.21 0.39 0.21 0.11 0 0 0 0.11

75 0.18 0.19 0.23 0.26 0.30 0.25 0.65 0.41 0.16 0 0 0 0.18

70 0.21 0.20 0.35 0.32 0.33 0.31 1.01 0.89 0.29 0 0 0 0.20

65 0.22 0.21 0.42 0.37 0.36 0.35 1.35 1.49 0.43 0 0 0.01 0.22

60 0.23 0.29 0.53 0.41 0.41 0.41 1.76 2.07 0.57 0.13 0.08 0.09 0.29

55 0.25 0.39 0.61 0.47 0.55 0.58 2.29 3.11 0.78 0.42 0.15 0.17 0.37

50 0.28 0.47 0.71 0.58 0.81 0.71 3.30 5.18 1.61 0.52 0.18 0.19 0.45

45 0.31 0.62 0.85 0.74 1.02 0.89 4.95 9.63 2.63 0.66 0.20 0.22 0.56

40 0.36 0.68 0.96 0.90 1.23 1.23 6.01 13.0 5.20 0.84 0.22 0.27 0.73

35 0.51 0.74 1.04 1.00 1.38 1.64 6.98 15.7 7.63 0.94 0.31 0.31 0.94

30 0.65 0.82 1.26 1.22 1.51 1.95 7.83 18.0 9.21 1.11 0.36 0.38 1.19

25 0.74 1.01 1.44 1.45 1.67 2.13 9.83 20.2 11.2 1.53 0.44 0.53 1.65

20 0.87 1.27 2.08 1.60 1.83 2.37 13.1 23.3 14.2 1.91 0.58 0.60 2.21

15 0.93 1.91 2.47 1.94 2.07 2.66 17.8 26.9 18.0 3.35 0.91 0.72 3.16

10 0.99 2.37 3.03 2.18 2.34 4.17 21.3 29.7 22.2 5.27 1.28 0.86 7.56

5 1.35 3.05 3.37 2.46 2.64 9.03 25.6 32.5 25.3 9.21 3.55 1.08 18.9
87

1-5.R00-1A SURKHRUD RIVER NEAR SULTANPUR, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 1.40 0.35 0.35 0.25 0.17

0.95 1.05 7.80 1.45 1.21 0.84 0.58

0.90 1.11 16.3 2.81 2.18 1.53 1.06

0.80 1.25 33.9 5.70 4.20 3.00 2.10

0.50 2 88.7 17.1 12.3 9.33 6.99

0.20 5 144 37.4 28.6 24.1 20.2

0.10 10 162 50.6 41.0 37.0 33.3

0.04 25 173 65.0 57.0 55.4 54.5

0.02 50 176 73.8 1

68.4 170.2 73.4

0.01 100 178 1

81.2 179.2 185.4 94.6

0.005 200 179 1

87.2 189.2 1101 118

0.002 500 179 ng ng ng ng

1

Data does not fit log-Pearson Type III curve, use with caution.

1-5.R00-1A SURKHRUD RIVER NEAR SULTANPUR, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 0 0 0 0 0 0 0 0 0.01

0.10 10 0 0 0 0 0 0 0 0 0.03

0.20 5 0 0 0 0 0 0 0.01 0.05 0.10

0.50 2 0 0 0 0.07 0.10 0.15 0.20 0.30 0.47
88

1-5.R00-1A SURKHRUD RIVER NEAR SULTANPUR, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 0.02 0.05 0.06 0.07 0 0 0 0.09

0.10 10 0.04 0.07 0.08 0.11 0.02 0.05 0.06 0.15

0.20 5 0.06 0.10 0.13 0.17 0.05 0.11 0.14 0.28

0.50 2 0.16 0.23 0.29 0.40 0.15 0.29 0.38 0.86

June-July-August September-October-November

0.05 20 0 0 0 0 0 0 0 0

0.10 10 0 0 0 0 0 0 0 0

0.20 5 0 0 0 0 0 0 0 0.01

0.50 2 0 0.01 0.10 0.24 0 0.04 0.10 0.18

1-5.R00-1A SURKHRUD RIVER NEAR SULTANPUR, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1968 March 10, 1968 62.8 1975 August 13, 1975 281

1969 May 22, 1969 41.8 1978 August 16, 1978 117

1970 April 16, 1970 105 1971 April 27, 1971 115

1971 April 27, 1971 115 1970 April 16, 1970 105

1972 September 18, 1972 80.0 1972

September 18, 

1972 80.0

1973 April 25, 1973 47.0 1979 February 18, 1979 74.8

1974 April 8, 1974 3.36 1977 April 4, 1977 73.2

1975 August 13, 1975 281 1976 August 15, 1976 64.1

1976 August 15, 1976 64.1 1968 March 10, 1968 62.8

1977 April 4, 1977 73.2 1973 April 25, 1973 47.0

1978 August 16, 1978 117 1969 May 22, 1969 41.8

1979 February 18, 1979 74.8 1974 April 8, 1974 3.36
89

1-5.R00-1A SURKHRUD RIVER NEAR SULTANPUR, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[Data may not be rounded in accordance with U.S. Geological Survey publication standards; --, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1968 -- -- -- -- -- -- 8.20 18.4 14.1 4.28 0.74 0.43 --

1969 1.33 2.35 3.13 2.00 1.92 1.14 6.91 10.4 5.87 1.32 0.24 0 3.05

1970 0.39 2.71 1.95 0.92 0.97 0.84 5.75 2.49 0.19 0 0 0.08 1.35

1971 0.20 0.20 0.18 0.18 0.18 0.18 0.49 0.14 0 0 0 0 0.15

1972 0.01 0.07 0.09 0.40 1.44 2.03 6.11 27.5 19.6 1.45 0.27 1.35 5.02

1973 1.00 1.05 2.61 2.01 2.22 8.16 22.6 27.5 24.1 8.98 0.28 0.25 8.41

1974 0.62 0.79 1.11 0.54 0.15 0.20 0.35 0.17 0.21 0 0 0.01 0.35

1975 0.15 0.23 0.36 0.33 0.36 3.84 15.5 27.3 8.25 1.25 5.50 0.72 5.35

1976 -- -- -- -- 2.11 1.83 11.9 13.0 5.75 0.98 1.47 1.28 --

1977 0.50 0.50 0.72 1.23 0.49 0.27 2.49 0.93 0.65 0.96 2.36 0.34 0.96

1978 0.55 0.34 0.54 0.44 0.35 0.45 1.92 2.30 0.68 2.57 4.60 0.65 1.30

1979 0.29 0.18 0.22 0.48 2.47 1.66 4.53 2.09 0.13 0.15 0.51 0.68 1.10

1980 0.36 0.66 1.08 1.23 1.51 2.48 -- -- -- -- -- -- --
90

1-6.L00-1A LAGHMAN RIVER AT PUL-I-QARGHAI

(U.S. Geological Survey identification number: 343300070140000)

LOCATION: Lat 34o33'N., long 70o14'E.

DRAINAGE AREA: 6,155 km2

.

ELEVATION: 640 meters above mean sea level.

PERIOD OF RECORD: October 1, 1960 to September 30, 1979.

GAGE: Water-stage recorder.

0

10

20

30

40

50

60

70

80

90

100

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
91

1-6.L00-1A LAGHMAN RIVER AT PUL-I-QARGHAI, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 18.6 1962 1.50 1972 6.37 4.33 0.68 0.90

November 15.2 1962 1.23 1972 5.41 3.10 0.57 0.76

December 14.0 1963 0.95 1972 5.09 3.43 0.67 0.72

January 12.5 1962 1.23 1971 4.67 2.69 0.58 0.66

February 23.1 1972 1.79 1971 6.38 5.08 0.80 0.90

March 58.2 1969 4.88 1970 24.4 15.5 0.63 3.45

April 203 1973 46.6 1962 106 35.7 0.34 15.0

May 282 1973 55.9 1962 169 47.8 0.28 23.9

June 358 1972 81.5 1971 225 70.3 0.31 31.8

July 196 1965 13.8 1971 112 51.00 0.46 15.8

August 67.5 1979 9.02 1971 33.0 19.0 0.58 4.67

September 27.6 1961 2.79 1962 10.1 6.17 0.61 1.43

Annual 91.5 1973 28.6 1971 59.0 16.7 0.28 100
92

1-6.L00-1A LAGHMAN RIVER AT PUL-I-QARGHAI, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 1.67 1.30 1.06 1.03 1.89 2.92 30.1 64.7 88.9 14.4 7.23 2.05 2.11

90 1.92 2.20 2.04 1.90 2.11 3.99 39.3 90.3 125 22.0 8.29 2.98 2.89

85 2.01 2.86 2.10 2.00 2.65 4.93 50.2 106 150 32.3 10.2 4.18 3.48

80 2.78 3.01 2.82 2.60 2.96 5.62 57.9 114 167 48.0 11.4 4.78 4.28

75 3.46 3.20 2.96 2.84 3.13 6.83 65.0 121 176 57.9 12.9 5.31 4.80

70 4.07 3.50 3.15 3.04 3.32 8.31 71.4 130 184 67.2 15.5 5.90 5.40

65 4.37 4.14 3.44 3.27 3.61 10.5 77.6 140 193 77.5 18.8 6.41 6.21

60 4.59 4.42 3.74 3.50 3.99 12.8 83.8 152 202 89.1 21.0 6.95 7.49

55 4.89 4.61 4.33 3.82 4.60 15.3 90.0 164 209 97.3 23.6 7.55 9.32

50 5.23 4.81 4.59 4.14 4.79 18.3 96.2 173 216 105 26.3 8.27 12.5

45 5.52 5.01 4.79 4.42 4.97 20.0 103 181 226 113 30.0 9.50 17.7

40 5.87 5.23 4.93 4.67 5.45 21.8 111 190 237 126 32.7 10.3 25.4

35 6.39 5.46 5.07 4.82 5.90 23.7 118 198 251 136 36.1 10.8 40.8

30 7.10 5.79 5.27 4.97 6.41 26.9 126 203 266 146 39.8 11.6 64.4

25 7.62 6.23 5.57 5.12 7.34 30.8 135 207 284 157 44.8 13.0 92.4

20 8.12 6.67 5.94 5.55 8.90 40.7 144 214 300 168 53.5 14.8 124

15 9.65 7.05 6.94 5.96 10.6 48.7 161 225 316 186 60.9 16.3 159

10 12.2 9.11 11.1 7.97 12.7 56.4 185 247 343 209 71.3 18.6 195

5 17.8 12.9 14.0 12.1 16.3 70.1 224 278 372 238 81.5 25.6 239
93

1-6.L00-1A LAGHMAN RIVER AT PUL-I-QARGHAI, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 222 177 161 155 148

0.95 1.05 263 202 184 175 165

0.90 1.11 288 218 199 188 176

0.80 1.25 320 239 219 206 192

0.50 2 389 288 266 248 229

0.20 5 470 349 327 304 280

0.10 10 517 388 367 342 315

0.04 25 571 436 417 390 359

0.02 50 609 471 454 426 393

0.01 100 644 505 491 462 427

0.005 200 677 539 528 499 462

0.002 500 720 ng ng ng ng

1-6.L00-1A LAGHMAN RIVER AT PUL-I-QARGHAI, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 1.01 1.01 1.03 1.05 1.07 1.24 1.41 1.58 2.49

0.10 10 1.31 1.32 1.34 1.37 1.40 1.60 1.79 2.01 2.93

0.20 5 1.75 1.76 1.80 1.84 1.91 2.13 2.36 2.64 3.56

0.50 2 2.85 2.89 2.95 3.02 3.18 3.47 3.77 4.19 5.19
94

1-6.L00-1A LAGHMAN RIVER AT PUL-I-QARGHAI, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 1.08 1.10 1.10 1.12 1.86 2.46 2.75 5.85

0.10 10 1.40 1.44 1.44 1.47 2.30 3.05 3.60 7.75

0.20 5 1.88 1.95 1.96 2.01 3.04 4.02 5.01 10.8

0.50 2 3.01 3.19 3.25 3.40 5.55 7.26 9.60 19.7

June-July-August September-October-November

0.05 20 4.73 5.51 6.52 8.10 1.31 1.35 1.42 1.49

0.10 10 5.88 6.92 8.32 10.9 1.68 1.71 1.80 1.89

0.20 5 7.64 9.10 11.1 15.3 2.24 2.25 2.39 2.53

0.50 2 12.6 15.3 18.9 27.9 3.70 3.76 3.99 4.34
95

1-6.L00-1A LAGHMAN RIVER AT PUL-I-QARGHAI, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1961 May 6, 1961 250 1968 April 30, 1968 592

1962 June 12, 1962 421 1972 June 16, 1972 519

1963 May 13, 1963 359 1967 June 12, 1967 506

1964 July 3, 1964 450 1979 June 11, 1979 465

1965 April 18, 1965 442 1964 July 3, 1964 450

1966 June 19, 1966 410 1973 June 3, 1973 444

1967 June 12, 1967 506 1965 April 18, 1965 442

1968 April 30, 1968 592 1962 June 12, 1962 421

1969 June 16, 1969 417 1969 June 16, 1969 417

1970 May 22, 1970 332 1966 June 19, 1966 410

1971 May 20, 1971 336 1963 May 13, 1963 359

1972 June 16, 1972 519 1978 July 6, 1978 353

1973 June 3, 1973 444 1975 June 17, 1975 339

1974 May 31, 1974 270 1971 May 20, 1971 336

1975 June 17, 1975 339 1976 June 4, 1976 334

1976 June 4, 1976 334 1970 May 22, 1970 332

1977 June 23, 1977 292 1977 June 23, 1977 292

1978 July 6, 1978 353 1974 May 31, 1974 270

1979 June 11, 1979 465 1961 May 6, 1961 250
96

1-6.L00-1A LAGHMAN RIVER AT PUL-I-QARGHAI, Continued 

Monthly and annual mean discharges, in cubic meters per second 

 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1961 4.37 4.13 6.1 5.29 5.06 25.6 110 205 184 106 43.3 27.6 60.8

1962 18.6 15.2 13.5 12.5 9.21 8.09 46.6 55.9 210 93.6 20.7 2.79 42.2

1963 2.07 5.95 14.0 8.92 1.94 20.1 72.3 132 182 103 22.9 5.49 47.7

1964 4.45 4.57 4.65 4.83 5.10 14.3 88.8 134 178 117 32.7 6.80 49.6

1965 5.29 4.91 4.81 5.32 6.61 17.5 107 194 265 196 60.2 14.6 73.7

1966 8.55 6.36 5.50 5.36 10.0 42.6 120 168 243 104 40.6 19.2 64.6

1967 12.9 8.15 3.58 4.18 5.13 12.9 82 155 276 166 39.6 8.85 64.7

1968 5.70 5.68 5.79 4.11 6.10 42.2 131 184 324 190 55.9 11.6 80.5

1969 6.65 4.23 5.02 4.91 5.85 58.2 98.5 149 262 173 54.4 14.5 70.0

1970 12.2 9.33 5.31 3.24 3.00 4.88 73.2 143 126 27.9 12.5 11.2 36.1

1971 3.58 2.77 2.00 1.23 1.79 10.4 59.0 154 81.5 13.8 9.02 3.24 28.6

1972 1.50 1.23 0.95 2.42 23.1 50.2 115 213 358 119 21.4 12.6 76.3

1973 8.65 7.00 6.84 7.93 14.2 43.1 203 282 327 156 31.5 8.00 91.5

1974 5.16 4.66 2.44 2.23 2.93 23.5 87.5 143 184 65.1 11.5 3.98 44.8

1975 2.00 2.21 2.02 1.96 2.24 8.01 114 162 224 113 54.2 11.4 58.2

1976 7.25 5.14 4.25 3.81 6.28 19.5 142 172 187 97.0 28.7 9.98 56.9

1977 4.74 2.94 3.07 4.36 3.71 19.1 95.3 131 181 54.8 10.4 3.75 42.8

1978 2.35 3.11 3.34 2.77 3.36 19.1 125 192 202 81.2 9.91 5.03 54.2

1979 5.00 5.17 3.44 3.34 5.64 24.7 145 238 282 147 67.5 12.0 78.5
97

1-7.L00-1A TAGAB RIVER AT TAGAB

(U.S. Geological Survey identification number: 344000069410000)

LOCATION: Lat 34o40'N., long 69o41'E.

DRAINAGE AREA: 800 km2

.

ELEVATION: 1,060 meters above mean sea level.

PERIOD OF RECORD: August 7, 1968 to April 30, 1979.

GAGE: Water-stage recorder.

0.00

0.50

1.00

1.50

2.00

2.50

3.00

3.50

4.00

4.50

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
98

1-7.L00-1A TAGAB RIVER AT TAGAB, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 1.18 1974 0.06 1979 0.46 0.37 0.80 2.76

November 1.64 1970 0.20 1976 0.70 0.52 0.75 4.15

December 2.32 1973 0.43 1978 1.06 0.62 0.59 6.30

January 1.90 1973 0.47 1978 1.16 0.51 0.44 6.89

February 2.35 1973 0.56 1978 1.28 0.57 0.44 7.63

March 4.69 1973 0.41 1977 1.48 1.16 0.78 8.83

April 18.4 1973 0.27 1977 5.37 4.79 0.89 32.0

May 10.8 1973 0.07 1977 3.84 3.64 0.95 22.9

June 2.29 1973 0.07 1975 0.70 0.86 1.23 4.19

July 2.16 1978 0.01 1977 0.45 0.77 1.69 2.69

August 0.26 1973 0.01 1976 0.09 0.10 1.11 0.53

September 0.80 1973 0.01 1977 0.20 0.24 1.15 1.21

Annual 3.96 1973 0.48 1977 1.42 1.00 0.70 100
99

1-7.L00-1A TAGAB RIVER AT TAGAB, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 0.05 0.20 0.41 0.52 0.55 0.23 0.22 0.04 0.07 0 0.01 0.01 0.02

90 0.10 0.23 0.45 0.58 0.63 0.51 0.45 0.11 0.10 0.01 0.01 0.01 0.03

85 0.12 0.25 0.47 0.60 0.66 0.65 0.87 0.13 0.11 0.01 0.01 0.02 0.09

80 0.15 0.27 0.48 0.62 0.70 0.72 1.16 0.27 0.12 0.02 0.01 0.02 0.12

75 0.19 0.30 0.52 0.68 0.79 0.83 1.43 0.41 0.13 0.02 0.01 0.02 0.17

70 0.22 0.32 0.55 0.73 0.89 0.87 1.74 0.52 0.13 0.02 0.02 0.03 0.23

65 0.24 0.34 0.62 0.90 0.97 0.91 2.02 0.77 0.14 0.03 0.02 0.05 0.29

60 0.26 0.36 0.69 1.00 1.02 0.95 2.57 1.04 0.16 0.06 0.02 0.08 0.37

55 0.27 0.38 0.77 1.06 1.06 1.02 2.79 2.02 0.17 0.10 0.02 0.09 0.47

50 0.30 0.40 0.86 1.14 1.16 1.12 3.11 2.29 0.19 0.10 0.05 0.10 0.59

45 0.33 0.47 0.95 1.20 1.26 1.21 3.75 2.90 0.21 0.11 0.06 0.10 0.73

40 0.39 0.56 1.18 1.25 1.43 1.28 4.67 3.37 0.26 0.12 0.09 0.11 0.88

35 0.46 0.83 1.34 1.31 1.54 1.37 5.77 4.59 0.50 0.13 0.10 0.17 1.03

30 0.58 1.04 1.43 1.50 1.67 1.48 6.77 5.65 0.63 0.17 0.11 0.19 1.21

25 0.77 1.13 1.51 1.58 1.75 1.62 7.70 6.56 0.70 0.22 0.12 0.25 1.43

20 0.86 1.21 1.60 1.69 1.80 1.78 8.55 7.56 0.79 0.31 0.16 0.29 1.70

15 0.93 1.31 1.73 1.78 1.85 2.17 9.90 8.78 0.94 0.43 0.24 0.37 2.06

10 1.03 1.48 1.99 1.88 1.90 2.63 12.1 9.90 2.12 0.60 0.26 0.44 2.95

5 1.27 1.85 2.31 1.99 2.04 3.39 18.2 11.0 3.89 0.93 0.29 0.67 7.04
100

1-7.L00-1A TAGAB RIVER AT TAGAB, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 3.00 1.30 1.16 1.06 0.97

0.95 1.05 6.00 2.64 2.34 2.04 1.65

0.90 1.11 8.50 3.73 3.28 2.81 2.17

0.80 1.25 12.8 5.49 4.79 4.03 3.02

0.50 2 25.6 10.6 8.97 7.45 5.60

0.20 5 46.8 18.2 14.9 12.6 10.1

0.10 10 62.0 23.1 18.6 15.9 13.7

0.04 25 81.7 29.1 22.8 20.0 18.9

0.02 50 96.4 33.2 25.6 1

22.9 23.1

0.01 100 111 37.1 28.1 1

25.7 27.6

0.005 200 125 40.7 1

30.4 128.3 32.4

0.002 500 144 ng ng ng ng

1

Data does not fit log-Pearson Type III curve, use with caution.

1-7.L00-1A TAGAB RIVER AT TAGAB, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 0 0 0 0 0 0 0.01 0.03 0.06

0.10 10 0 0 0 0 0 0.01 0.01 0.04 0.08

0.20 5 0.01 0.01 0.01 0.01 0.01 0.01 0.02 0.05 0.11

0.50 2 0.02 0.03 0.03 0.03 0.03 0.04 0.06 0.11 0.23
101

1-7.L00-1A TAGAB RIVER AT TAGAB, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 0.26 0.29 0.30 0.34 0.03 0.03 0.04 0.10

0.10 10 0.31 0.35 0.37 0.42 0.04 0.06 0.07 0.19

0.20 5 0.40 0.44 0.47 0.53 0.08 0.12 0.14 0.39

0.50 2 0.65 0.70 0.75 0.83 0.25 0.38 0.47 1.09

June-July-August September-October-November

0.05 20 0 0 0 0 0.01 0.01 0.01 0.01

0.10 10 0 0 0 0 0.01 0.01 0.01 0.01

0.20 5 0.01 0.01 0.01 0.01 0.01 0.01 0.02 0.03

0.50 2 0.02 0.03 0.03 0.04 0.03 0.04 0.05 0.10

1-7.L00-1A TAGAB RIVER AT TAGAB, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1969 April 20, 1969 21.4 1978 July 6, 1978 60.0

1970 April 15, 1970 41.5 1973 April 4, 1973 56.3

1971 March 26, 1971 15.0 1976 April 24, 1976 50.0

1972 April 28, 1972 25.8 1970 April 15, 1970 41.5

1973 April 4, 1973 56.3 1972 April 28, 1972 25.8

1974 April 8, 1974 10.1 1969 April 20, 1969 21.4

1975 April 5, 1975 18.5 1975 April 5, 1975 18.5

1976 April 24, 1976 50.0 1971 March 26, 1971 15.0

1977 January 10, 1977 5.80 1974 April 8, 1974 10.1

1978 July 6, 1978 60.0 1977

January 10, 

1977 5.80
102

1-7.L00-1A TAGAB RIVER AT TAGAB, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[Data may not be rounded in accordance with U.S. Geological Survey publication standards; --, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1968 -- -- -- -- -- -- -- -- -- -- -- 0.21 --

1969 0.76 1.24 1.58 1.55 1.71 2.20 5.68 7.37 2.09 0.37 0.26 0.42 2.10

1970 0.92 1.64 1.51 1.20 1.06 1.28 2.59 0.39 0.16 0.13 0.05 0.12 0.92

1971 0.23 0.30 0.62 0.60 0.65 0.72 2.37 1.53 0.21 0.10 0.10 0.10 0.63

1972 0.27 0.34 0.47 0.64 0.75 1.30 3.45 7.79 1.29 0.13 0.13 0.31 1.41

1973 0.76 1.36 2.32 1.90 2.35 4.69 18.4 10.8 2.29 1.58 0.26 0.80 3.96

1974 1.18 1.08 1.66 1.73 1.87 1.35 6.51 1.55 0.16 0.03 0.01 0.10 1.42

1975 0.27 0.31 0.62 1.04 1.02 0.98 4.55 2.86 0.07 0.02 0.01 0.13 0.99

1976 0.18 0.20 0.54 0.76 1.02 0.85 5.57 4.44 0.54 0.01 0.01 0.04 1.17

1977 0.35 0.40 1.05 1.71 1.42 0.41 0.27 0.07 0.12 0.01 0.01 0.01 0.48

1978 0.14 0.35 0.43 0.47 0.56 0.97 7.16 1.60 0.12 2.16 0.06 0.01 1.17

1979 0.06 0.45 0.87 1.15 1.69 1.57 2.54 -- -- -- -- -- --
103

1-8.21L-1A SALANG RIVER AT BAGH-I-LALA

(U.S. Geological Survey identification number: 350900069130000)

LOCATION: Lat 35o09'N., long 69o13'E.

DRAINAGE AREA: 485 km2

.

ELEVATION: 1,660 meters above mean sea level.

PERIOD OF RECORD: October 1, 1961 to March 23, 1964 and December 2, 1964 to

February 29, 1980.

GAGE: Water-stage recorder. Station was destroyed by flooding on March 23, 1964.

0

2

4

6

8

10

12

14

16

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
104

1-8.21L-1A SALANG RIVER AT BAGH-I-LALA, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 5.08 1962 2.39 1979 3.47 0.69 0.20 2.78

November 4.59 1962 2.23 1975 3.12 0.69 0.22 2.50

December 4.37 1962 1.92 1975 2.90 0.57 0.20 2.33

January 4.30 1962 1.97 1964 2.73 0.60 0.22 2.19

February 4.81 1980 1.71 1971 3.17 0.84 0.26 2.54

March 15.3 1969 4.03 1975 7.80 3.18 0.41 6.25

April 31.7 1973 10.3 1971 22.4 5.68 0.25 18.0

May 43.9 1973 11.1 1971 27.4 8.68 0.32 22.0

June 45.4 1968 9.55 1971 27.1 9.24 0.34 21.7

July 30.8 1965 6.47 1971 14.1 5.79 0.41 11.3

August 11.7 1965 3.90 1971 6.48 1.88 0.29 5.19

September 5.51 1962 3.24 1975 4.11 0.73 0.18 3.30

Annual 13.6 1973 5.05 1971 10.14 2.28 0.23 100
105

1-8.21L-1A SALANG RIVER AT BAGH-I-LALA, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 2.44 2.12 2.01 1.90 1.78 3.01 8.77 12.0 11.2 6.07 3.63 2.94 2.24

90 2.65 2.29 2.25 2.03 2.13 3.20 10.7 14.8 13.5 6.87 3.99 3.06 2.53

85 2.73 2.43 2.44 2.11 2.22 3.60 12.2 16.9 16.5 7.39 4.30 3.26 2.69

80 2.84 2.58 2.48 2.23 2.34 4.16 13.4 19.4 17.9 8.61 4.67 3.36 2.88

75 2.98 2.62 2.59 2.27 2.42 4.53 14.7 21.1 19.3 9.39 5.04 3.46 3.09

70 3.08 2.67 2.62 2.40 2.55 4.87 15.9 22.0 20.5 10.1 5.21 3.51 3.30

65 3.13 2.81 2.66 2.46 2.72 5.18 17.5 22.9 21.8 10.5 5.42 3.56 3.51

60 3.21 2.88 2.72 2.51 2.86 5.50 18.3 23.8 23.7 10.9 5.63 3.72 3.78

55 3.40 2.94 2.76 2.59 2.96 5.94 19.3 24.7 25.1 11.5 5.86 3.78 4.10

50 3.47 3.06 2.80 2.66 3.06 6.24 20.6 25.6 26.2 12.1 6.04 3.95 4.62

45 3.55 3.11 2.88 2.72 3.22 6.67 22.0 26.6 27.9 13.3 6.23 4.01 5.30

40 3.63 3.16 2.92 2.76 3.32 7.26 23.6 27.8 29.1 14.2 6.64 4.20 6.49

35 3.67 3.21 2.96 2.81 3.44 7.86 25.8 29.4 30.4 15.2 6.88 4.41 8.40

30 3.71 3.25 3.09 2.90 3.59 8.74 27.5 31.4 31.6 16.2 7.17 4.56 10.9

25 3.74 3.44 3.18 3.09 3.71 9.56 28.7 34.1 33.3 17.4 7.62 4.78 14.6

20 3.94 3.60 3.31 3.21 3.90 10.5 30.1 36.1 37.3 18.9 8.11 4.92 18.5

15 4.20 3.91 3.57 3.49 4.09 12.0 32.1 38.9 39.5 20.8 8.57 5.02 22.3

10 4.50 4.37 3.68 3.57 4.30 15.3 35.2 42.7 41.9 22.9 9.30 5.28 26.8

5 4.88 4.61 4.17 3.98 4.73 18.8 40.1 45.0 45.2 29.3 10.2 5.69 32.8
106

1-8.21L-1A SALANG RIVER AT BAGH-I-LALA, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 18.9 11.9 10.7 10.1 9.83

0.95 1.05 26.8 17.7 16.7 16.0 15.1

0.90 1.11 32.0 21.6 20.6 19.7 18.5

0.80 1.25 39.4 27.1 26.0 24.7 22.9

0.50 2 57.2 40.1 37.7 34.8 31.8

0.20 5 80.6 56.2 50.3 44.4 40.2

0.10 10 95.2 65.8 56.7 48.6 44.0

0.04 25 113 76.7 63.1 52.4 47.3

0.02 50 125 84.0 66.9 54.3 49.1

0.01 100 137 90.8 70.1 55.8 50.5

0.005 200 149 97.0 72.7 57.0 51.5

0.002 500 164 ng ng ng ng

1-8.21L-1A SALANG RIVER AT BAGH-I-LALA, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 1.28 1.54 1.58 1.63 1.73 1.86 2.04 2.14 2.44

0.10 10 1.41 1.66 1.70 1.75 1.86 1.99 2.16 2.26 2.56

0.20 5 1.59 1.81 1.87 1.92 2.03 2.17 2.32 2.42 2.72

0.50 2 2.00 2.17 2.25 2.30 2.41 2.55 2.67 2.77 3.09
107

1-8.21L-1A SALANG RIVER AT BAGH-I-LALA, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 1.18 1.47 1.63 1.76 2.15 2.24 2.56 4.00

0.10 10 1.34 1.63 1.76 1.88 2.45 2.63 2.98 4.46

0.20 5 1.56 1.85 1.94 2.05 2.83 3.14 3.56 5.14

0.50 2 2.07 2.34 2.37 2.45 3.63 4.19 4.88 6.93

June-July-August September-October-November

0.05 20 3.00 3.16 3.45 3.95 1.79 1.83 1.91 2.10

0.10 10 3.35 3.51 3.79 4.34 1.97 2.01 2.09 2.25

0.20 5 3.80 3.97 4.25 4.88 2.19 2.25 2.32 2.46

0.50 2 4.70 4.92 5.24 6.13 2.65 2.72 2.79 2.90
108

1-8.21L-1A SALANG RIVER AT BAGH-I-LALA, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1962 April 25, 1962 43.8 1967 April 27, 1967 124

1963 May 14, 1963 92.8 1963 May 14, 1963 92.8

1965 June 13, 1965 50.0 1969 April 14, 1969 91.0

1966 April 25, 1966 60.6 1972 May 13, 1972 80.8

1967 April 27, 1967 124 1968 April 29, 1968 76.1

1968 April 29, 1968 76.1 1966 April 25, 1966 60.6

1969 April 14, 1969 91.0 1975 May 15, 1975 60.0

1970 April 15, 1970 58.5 1970 April 15, 1970 58.5

1971 May 19, 1971 22.4 1973 June 3, 1973 56.7

1972 May 13, 1972 80.8 1976 April 23, 1976 53.1

1973 June 3, 1973 56.7 1965 June 13, 1965 50.0

1974 May 1, 1974 45.5 1979 April 30, 1979 48.9

1975 May 15, 1975 60.0 1974 May 1, 1974 45.5

1976 April 23, 1976 53.1 1962 April 25, 1962 43.8

1977 May 27, 1977 27.9 1978 May 4, 1978 41.6

1978 May 4, 1978 41.6 1977 May 27, 1977 27.9

1979 April 30, 1979 48.9 1971 May 19, 1971 22.4
109

1-8.21L-1A SALANG RIVER AT BAGH-I-LALA, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[Data may not be rounded in accordance with U.S. Geological Survey publication standards; --, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1962 5.08 4.59 4.37 4.30 4.39 5.59 19.8 23.2 20.6 12.6 7.33 5.51 9.79

1963 4.51 4.12 3.55 3.52 3.87 7.73 17.5 39.6 34.1 14.2 6.36 3.35 11.9

1964 2.86 2.57 2.21 1.97 3.25 -- -- -- -- -- -- -- --

1965 -- -- -- 3.33 4.06 8.93 25.7 38.1 40.5 30.8 11.7 5.25 --

1966 3.72 3.26 2.86 2.84 3.46 9.05 26.2 25.1 32.3 11.8 6.25 4.56 10.9

1967 3.62 3.10 2.75 2.45 2.37 5.35 28.2 23.0 25.6 12.8 6.63 5.02 10.1

1968 3.60 2.28 2.54 2.38 2.76 9.03 23.5 26.8 45.4 19.5 7.26 4.66 12.5

1969 3.74 3.27 3.79 2.75 3.68 15.3 29.1 21.4 30.7 18.0 8.18 4.54 12.1

1970 3.60 3.82 2.82 2.26 2.79 5.62 16.6 21.1 15.0 7.28 4.42 3.34 7.40

1971 2.66 2.52 2.72 1.97 1.71 4.29 10.3 11.1 9.55 6.47 3.90 3.28 5.05

1972 2.70 2.62 2.53 2.82 3.12 13.7 24.2 36.8 32.0 18.0 7.43 4.37 12.5

1973 4.13 4.22 3.33 3.42 4.24 11.4 31.7 43.9 33.5 13.5 6.40 3.70 13.6

1974 3.75 3.05 2.55 2.06 2.28 5.81 18.6 23.2 19.4 8.72 4.60 3.66 8.16

1975 3.09 2.23 1.92 2.19 2.18 4.03 23.2 28.0 26.9 14.0 5.30 3.24 9.71

1976 3.18 2.91 2.96 2.51 2.72 5.50 23.4 33.1 28.8 16.9 7.08 4.37 11.1

1977 3.94 3.27 2.91 2.79 2.84 7.09 13.6 15.9 17.1 8.75 4.21 3.34 7.16

1978 3.02 3.06 2.93 3.04 3.23 7.74 23.5 30.6 21.0 10.1 5.36 3.94 9.81

1979 2.39 2.23 2.80 2.61 2.45 6.48 26.3 25.0 27.6 15.6 7.71 3.77 10.4

1980 2.90 3.01 2.67 2.67 4.81 -- -- -- -- -- -- -- --
110

1-8.2R0-1A GHORBAND RIVER AT PUL-I-ASHAWA

(U.S. Geological Survey identification number: 350500069080000)

LOCATION: Lat 35o05'N., long 69o08'E.

DRAINAGE AREA: 4,020 km2.

ELEVATION: 1,610 meters above mean sea level.

PERIOD OF RECORD: October 1, 1959 to February 4, 1980.

GAGE: Water-stage recorder.

0

5

10

15

20

25

30

35

40

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
111

1-8.2R0-1A GHORBAND RIVER AT PUL-I-ASHAWA, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 15.4 1961 5.08 1972 9.08 2.49 0.27 3.28

November 16.2 1961 6.76 1960 10.3 2.33 0.23 3.73

December 14.4 1961 6.68 1960 9.74 2.11 0.22 3.52

January 13.0 1961 5.72 1972 8.80 1.97 0.22 3.18

February 16.0 1960 4.63 1971 8.82 2.78 0.32 3.19

March 35.0 1960 8.45 1970 15.5 6.11 0.40 5.58

April 54.1 1965 21.7 1970 36.5 10.5 0.29 13.2

May 94.9 1960 33.2 1977 57.6 16.7 0.29 20.8

June 107 1968 22.5 1971 66.8 22.7 0.34 24.1

July 75.0 1965 7.68 1971 32.7 17.1 0.52 11.8

August 26.8 1960 3.40 1971 12.5 6.11 0.49 4.50

September 16.4 1960 3.41 1971 8.56 3.49 0.41 3.09

Annual 36.8 1960 12.5 1971 23.1 6.18 0.27 100
112

1-8.2R0-1A GHORBAND RIVER AT PUL-I-ASHAWA, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 5.63 6.81 6.82 5.61 4.92 7.19 15.9 27.2 26.5 9.06 3.88 3.40 5.73

90 6.22 7.82 7.19 6.18 5.55 7.87 18.9 33.1 33.5 12.0 5.26 4.27 6.76

85 6.70 8.16 8.05 6.61 6.09 8.54 20.7 36.8 39.8 13.8 5.82 4.91 7.43

80 7.11 8.55 8.37 7.06 6.39 9.06 22.1 39.9 46.1 15.7 6.60 5.61 8.04

75 7.43 8.91 8.59 7.39 6.76 9.87 23.6 43.5 49.9 17.4 7.74 6.08 8.63

70 7.68 9.10 8.69 7.74 7.06 10.9 25.1 46.3 53.5 19.7 8.74 6.55 9.11

65 7.89 9.26 8.79 8.10 7.28 11.7 26.8 48.4 56.2 21.7 9.53 6.96 9.58

60 8.10 9.41 8.91 8.29 7.64 12.4 28.4 50.6 59.1 23.4 10.2 7.16 10.1

55 8.30 9.58 9.03 8.49 8.05 13.0 30.5 53.1 61.8 25.2 10.9 7.36 11.0

50 8.58 9.82 9.23 8.75 8.41 13.5 33.0 55.6 64.4 28.1 11.6 7.72 11.9

45 8.83 9.98 9.38 8.95 8.72 14.1 35.4 58.3 67.4 30.3 12.2 8.20 12.9

40 9.03 10.2 9.51 9.17 9.11 14.6 37.6 61.0 70.9 32.9 12.7 8.95 14.6

35 9.38 10.4 9.88 9.42 9.59 15.5 39.6 63.5 75.3 36.3 13.3 9.66 17.2

30 10.1 10.7 10.1 9.64 10.0 17.1 41.6 66.2 80.3 39.6 14.2 10.3 22.6

25 10.7 11.9 10.2 9.87 10.5 18.4 44.2 70.4 84.7 43.3 15.5 10.9 29.4

20 11.1 12.4 11.0 10.1 11.3 20.4 48.4 75.2 90.1 47.3 16.7 11.8 38.6

15 12.3 12.8 12.4 10.7 12.0 23.3 53.1 79.8 96.1 52.3 18.3 12.5 48.5

10 13.0 13.6 13.7 11.9 12.5 26.4 59.7 85.0 103 59.9 20.5 13.7 59.6

5 14.8 15.6 14.4 12.9 13.0 29.9 74.3 93.4 111 76.5 24.8 15.3 76.7
113

1-8.2R0-1A GHORBAND RIVER AT PUL-I-ASHAWA, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 55.0 48.0 44.4 41.5 38.2

0.95 1.05 67.0 57.1 53.0 49.6 45.7

0.90 1.11 74.2 62.6 58.3 54.6 50.3

0.80 1.25 83.7 70.0 65.5 61.2 56.4

0.50 2 104 86.8 81.8 76.3 70.3

0.20 5 129 107 102 94.9 87.7

0.10 10 143 120 115 106 98.4

0.04 25 159 135 130 120 111

0.02 50 170 146 142 130 121

0.01 100 181 157 152 139 130

0.005 200 190 167 163 148 138

0.002 500 203 ng ng ng ng

1-8.2R0-1A GHORBAND RIVER AT PUL-I-ASHAWA, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 3.27 3.34 3.43 3.57 3.77 4.12 4.65 5.31 6.00

0.10 10 3.81 3.89 3.99 4.15 4.39 4.79 5.37 5.98 6.56

0.20 5 4.54 4.66 4.77 4.95 5.23 5.69 6.31 6.85 7.31

0.50 2 6.26 6.45 6.58 6.78 7.11 7.62 8.25 8.67 8.95
114

1-8.2R0-1A GHORBAND RIVER AT PUL-I-ASHAWA, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 4.22 4.44 4.70 5.09 5.74 6.52 7.07 8.81

0.10 10 4.72 4.99 5.24 5.64 6.15 6.92 7.57 9.53

0.20 5 5.40 5.73 5.96 6.36 6.79 7.56 8.35 10.6

0.50 2 6.95 7.37 7.56 7.96 8.66 9.46 10.7 13.7

June-July-August September-October-November

0.05 20 3.44 3.70 3.92 4.45 2.40 2.90 3.50 3.95

0.10 10 4.26 4.56 4.85 5.57 3.20 3.61 4.13 4.57

0.20 5 5.46 5.82 6.20 7.21 4.35 4.63 5.01 5.45

0.50 2 8.50 8.97 9.57 11.3 7.04 7.05 7.14 7.52
115

1-8.2R0-1A GHORBAND RIVER AT PUL-I-ASHAWA, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1960 April 18, 1960 146 1967 April 27, 1967 161

1961 June 5, 1961 139 1960 April 18, 1960 146

1962 June 11, 1962 84.4 1961 June 5, 1961 139

1963 May 15, 1963 96.2 1968 June 10, 1968 131

1964 April 11, 1964 93.0 1976 June 4, 1976 130

1965 June 13, 1965 118 1972 June 13, 1972 123

1966 June 18, 1966 108 1975 May 16, 1975 121

1967 April 27, 1967 161 1965 June 13, 1965 118

1968 June 10, 1968 131 1973 June 4, 1973 111

1969 June 17, 1969 97.5 1966 June 18, 1966 108

1970 May 21, 1970 73.2 1969 June 17, 1969 97.5

1971 May 20, 1971 69.7 1979 June 22, 1979 96.8

1972 June 13, 1972 123 1963 May 15, 1963 96.2

1973 June 4, 1973 111 1964 April 11, 1964 93.0

1974 June 1, 1974 63.2 1977 May 27, 1977 86.4

1975 May 16, 1975 121 1978 April 17, 1978 85.6

1976 June 4, 1976 130 1962 June 11, 1962 84.4

1977 May 27, 1977 86.4 1970 May 21, 1970 73.2

1978 April 17, 1978 85.6 1971 May 20, 1971 69.7

1979 June 22, 1979 96.8 1974 June 1, 1974 63.2
116

1-8.2R0-1A GHORBAND RIVER AT PUL-I-ASHAWA, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[Data may not be rounded in accordance with U.S. Geological Survey publication standards; --, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1960 6.21 6.76 6.68 7.48 16.0 35.0 54.0 94.9 102 68.4 26.8 16.4 36.8

1961 15.4 16.2 14.4 13.0 12.1 13.6 39.3 68.3 77.7 37.1 15.8 11.7 27.9

1962 11.1 12.8 13.7 12.9 12.6 14.0 29.1 40.5 48.2 23.7 12.3 14.1 20.4

1963 8.40 9.63 8.95 8.01 7.00 10.3 22.2 61.1 72.8 35.9 10.9 7.58 22.0

1964 7.61 9.66 9.53 9.26 9.02 16.0 46.5 59.0 62.1 31.3 11.3 6.85 23.2

1965 7.66 9.07 8.65 8.44 7.99 18.6 54.1 89.5 100 75.0 25.7 13.4 35.0

1966 12.7 12.9 12.0 10.3 10.5 14.9 34.5 53.0 72.0 25.7 10.5 8.51 23.1

1967 9.18 9.49 8.43 7.24 6.77 10.5 33.8 48.1 70.6 35.7 15.2 11.1 22.2

1968 9.45 9.88 10.2 9.23 9.32 19.3 42.9 59.1 107 51.9 17.0 10.1 29.6

1969 11.8 12.3 13.9 10.5 11.5 23.2 39.3 50.0 74.7 38.1 15.0 10.5 25.9

1970 12.4 14.4 9.43 8.29 7.38 8.45 21.7 40.8 34.0 13.4 6.21 5.85 15.2

1971 8.57 9.28 8.10 6.12 4.63 10.9 22.8 42.6 22.5 7.68 3.40 3.41 12.5

1972 5.08 6.91 6.84 5.72 5.26 19.7 36.7 74.0 91.1 36.9 13.2 7.98 25.8

1973 10.4 10.8 10.1 10.4 9.73 19.8 45.1 73.1 67.3 25.4 12.5 9.24 25.4

1974 9.47 10.5 9.95 9.82 8.57 11.1 23.1 39.5 42.6 14.9 5.60 5.86 15.9

1975 8.30 8.96 8.48 6.99 6.32 11.2 29.2 49.2 61.1 29.0 8.48 4.43 19.3

1976 6.85 8.18 9.29 8.63 6.24 11.7 41.5 71.3 69.8 31.9 8.51 7.27 23.4

1977 8.20 8.73 9.50 9.45 10.0 15.2 24.7 33.2 47.9 13.6 5.63 4.55 15.9

1978 6.60 8.89 8.91 9.03 8.77 15.6 47.5 57.3 42.8 20.7 8.85 7.22 20.2

1979 8.21 10.1 9.27 8.05 6.71 10.2 42.3 47.5 70.5 37.1 16.2 5.21 22.6

1980 7.12 11.2 8.27 6.03 -- -- -- -- -- -- -- -- --
117

1-8.3R0-1A SHATUL RIVER AT GULBAHAR

(U.S. Geological Survey identification number: 350900069170000)

LOCATION: Lat 35o09'N., long 69o17'E.

DRAINAGE AREA: 205 km2.

ELEVATION: 1,590 meters above mean sea level.

PERIOD OF RECORD: May 30, 1967 to March 6, 1980.

GAGE: Water-stage recorder.

0

1

2

3

4

5

6

7

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
118

1-8.3R0-1A SHATUL RIVER AT GULBAHAR, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 1.03 1970 0.03 1971 0.25 0.27 1.09 0.53

November 0.59 1970 0.03 1979 0.14 0.15 1.13 0.29

December 0.27 1970 0.03 1979 0.12 0.10 0.82 0.25

January 0.62 1973 0.02 1979 0.19 0.17 0.90 0.39

February 0.58 1976 0.01 1971 0.29 0.17 0.60 0.62

March 3.51 1969 0.36 1971 1.77 0.91 0.51 3.73

April 11.0 1978 2.20 1971 7.05 2.47 0.35 14.9

May 17.5 1978 5.23 1977 10.7 3.71 0.35 22.5

June 25.3 1972 6.13 1971 15.6 5.53 0.36 32.9

July 15.7 1968 1.27 1971 8.38 4.55 0.54 17.7

August 6.16 1968 0.75 1974 2.44 1.89 0.77 5.16

September 1.58 1969 0.03 1979 0.53 0.50 0.96 1.11

Annual 5.77 1968 1.50 1971 3.89 1.32 0.34 100
119

1-8.3R0-1A SHATUL RIVER AT GULBAHAR, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 0.04 0.02 0.02 0.02 0.02 0.07 2.09 3.64 6.37 1.03 0.22 0.02 0.03

90 0.05 0.03 0.03 0.03 0.06 0.25 2.90 4.61 8.14 1.51 0.37 0.03 0.04

85 0.06 0.03 0.03 0.03 0.07 0.34 3.45 5.54 9.15 1.88 0.49 0.06 0.06

80 0.07 0.04 0.04 0.04 0.09 0.39 3.78 6.32 10.1 2.72 0.64 0.07 0.08

75 0.08 0.04 0.04 0.04 0.10 0.48 4.13 6.97 11.0 3.57 0.78 0.08 0.12

70 0.10 0.05 0.04 0.05 0.12 0.66 4.45 7.80 11.8 4.66 0.93 0.12 0.17

65 0.11 0.05 0.05 0.06 0.15 0.75 4.93 8.37 12.7 5.22 1.10 0.17 0.23

60 0.12 0.05 0.06 0.06 0.17 0.88 5.43 8.90 13.5 6.39 1.33 0.20 0.32

55 0.13 0.06 0.06 0.07 0.22 1.05 6.11 9.58 14.2 7.02 1.46 0.23 0.44

50 0.15 0.06 0.07 0.09 0.24 1.35 6.53 10.3 15.0 7.84 1.65 0.27 0.69

45 0.17 0.08 0.07 0.12 0.28 1.61 7.04 11.0 16.1 8.73 1.95 0.33 1.01

40 0.19 0.10 0.09 0.16 0.33 1.82 7.49 11.5 17.3 9.50 2.21 0.40 1.68

35 0.21 0.13 0.10 0.19 0.35 2.03 8.14 12.2 18.3 10.3 2.74 0.49 2.84

30 0.28 0.15 0.13 0.24 0.37 2.37 8.92 13.2 19.2 11.5 3.02 0.72 4.13

25 0.36 0.18 0.16 0.30 0.40 2.96 9.61 14.6 20.1 12.7 3.49 0.85 6.08

20 0.42 0.22 0.20 0.34 0.43 3.28 10.3 15.5 21.2 13.7 4.00 0.99 8.15

15 0.46 0.25 0.27 0.38 0.50 3.58 11.4 16.2 22.6 14.6 4.82 1.19 10.4

10 0.52 0.31 0.29 0.43 0.64 4.02 12.4 17.2 24.4 15.5 5.99 1.47 13.1

5 0.93 0.52 0.36 0.59 0.82 4.71 13.6 18.7 26.7 18.1 7.39 1.76 17.1
120

1-8.3R0-1A SHATUL RIVER AT GULBAHAR, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 16.4 9.49 8.84 8.19 7.05

0.95 1.05 19.2 11.9 11.2 10.3 9.10

0.90 1.11 20.9 13.4 12.6 11.7 10.4

0.80 1.25 23.2 15.4 14.5 13.5 12.1

0.50 2 28.5 19.8 18.6 17.5 15.9

0.20 5 35.2 25.0 23.7 22.4 20.6

0.10 10 39.5 28.0 26.6 25.4 23.4

0.04 25 44.6 31.5 30.0 28.9 26.7

0.02 50 48.4 33.9 32.4 31.3 28.9

0.01 100 52.1 36.1 34.6 33.6 31.0

0.005 200 55.7 38.2 36.7 35.9 33.0

0.002 500 60.6 ng ng ng ng

1-8.3R0-1A SHATUL RIVER AT GULBAHAR, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 0.01 0.01 0.01 0.01 0.01 0.02 0.02 0.02 0.03

0.10 10 0.01 0.01 0.01 0.01 0.01 0.02 0.02 0.03 0.05

0.20 5 0.01 0.01 0.01 0.02 0.02 0.03 0.03 0.04 0.07

0.50 2 0.02 0.02 0.02 0.03 0.04 0.05 0.07 0.08 0.16
121

1-8.3R0-1A SHATUL RIVER AT GULBAHAR, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 0.01 0.01 0.01 0.01 0.02 0.03 0.04 0.40

0.10 10 0.01 0.01 0.02 0.02 0.05 0.07 0.11 0.59

0.20 5 0.01 0.02 0.02 0.03 0.11 0.17 0.26 0.88

0.50 2 0.03 0.03 0.05 0.06 0.34 0.50 0.81 1.64

June-July-August September-October-November

0.05 20 0.05 0.10 0.18 0.54 0.01 0.01 0.01 0.01

0.10 10 0.09 0.16 0.26 0.69 0.01 0.01 0.01 0.02

0.20 5 0.17 0.26 0.40 0.94 0.01 0.02 0.02 0.03

0.50 2 0.55 0.70 0.93 1.74 0.03 0.04 0.05 0.07

1-8.3R0-1A SHATUL RIVER AT GULBAHAR, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1968 June 25, 1968 41.8 1968 June 25, 1968 41.8

1969 June 16, 1969 28.2 1972 June 12, 1972 40.6

1970 May 21, 1970 27.6 1973 June 11, 1973 35.1

1971 May 19, 1971 20.6 1979 June 13, 1979 35.0

1972 June 12, 1972 40.6 1975 June 17, 1975 30.9

1973 June 11, 1973 35.1 1969 June 16, 1969 28.2

1974 June 4, 1974 21.6 1970 May 21, 1970 27.6

1975 June 17, 1975 30.9 1978 June 5, 1978 27.0

1976 July 6, 1976 24.5 1976 July 6, 1976 24.5

1977 June 22, 1977 20.7 1974 June 4, 1974 21.6

1978 June 5, 1978 27.0 1977 June 22, 1977 20.7

1979 June 13, 1979 35.0 1971 May 19, 1971 20.6
122

1-8.3R0-1A SHATUL RIVER AT GULBAHAR, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[Data may not be rounded in accordance with U.S. Geological Survey publication standards; --, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1967 -- -- -- -- -- -- -- -- 19.1 12.5 4.03 0.92 --

1968 0.45 0.23 0.19 0.37 0.35 2.54 8.24 11.3 22.5 15.7 6.16 1.21 5.77

1969 0.42 0.23 0.26 0.22 0.39 3.51 8.36 9.03 16.1 12.5 5.85 1.58 4.89

1970 1.03 0.59 0.27 0.30 0.35 1.67 6.47 12.3 12.2 2.92 0.99 0.04 3.27

1971 0.03 0.04 0.03 0.03 0.01 0.36 2.20 6.89 6.13 1.27 0.75 0.17 1.50

1972 0.18 0.10 0.06 0.06 0.08 2.37 6.42 13.5 25.3 11.8 3.53 0.78 5.34

1973 0.37 0.06 0.21 0.62 0.44 2.86 9.84 16.3 19.8 8.57 1.28 0.24 5.06

1974 0.17 0.10 0.08 0.08 0.37 1.56 6.82 8.91 10.7 5.08 0.75 0.13 2.90

1975 0.09 0.03 0.03 0.05 0.16 0.67 6.14 7.47 14.4 9.38 1.98 0.33 3.40

1976 0.19 0.08 0.07 0.13 0.58 1.71 6.30 9.28 12.2 11.0 2.40 0.44 3.70

1977 0.09 0.04 0.04 0.15 0.33 1.34 3.76 5.23 9.55 3.49 0.75 0.07 2.07

1978 0.09 0.05 0.04 0.18 0.13 1.29 11.0 17.5 14.5 3.91 1.47 0.90 4.27

1979 0.06 0.03 0.03 0.02 0.12 1.31 9.05 10.1 20.0 10.8 1.84 0.03 4.46

1980 0.10 0.19 0.23 0.22 0.49 -- -- -- -- -- -- -- --
123

1-8.L00-3A PANJSHER RIVER AT SHUKHI

(U.S. Geological Survey identification number: 345600069290000)

LOCATION: Lat 34o56'N., long 69o29'E.

DRAINAGE AREA: 10,850 km2.

ELEVATION: 1,400 meters above mean sea level.

PERIOD OF RECORD: October 1, 1966 to September 30, 1980.

GAGE: Water-stage recorder.

0

20

40

60

80

100

120

140

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
124

1-8.L00-3A PANJSHER RIVER AT SHUKHI, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 32.2 1973 23.6 1970 27.7 2.52 0.09 2.49

November 32.9 1970 22.6 1972 29.4 3.24 0.11 2.64

December 45.0 1969 23.9 1972 32.8 5.25 0.16 2.95

January 44.1 1969 26.0 1972 34.9 5.20 0.15 3.13

February 37.2 1969 24.7 1972 31.3 4.20 0.13 2.81

March 67.2 1969 29.0 1974 41.3 11.5 0.28 3.71

April 207 1973 60.2 1977 123 38.3 0.31 11.1

May 345 1973 95.5 1977 203 64.6 0.32 18.2

June 493 1968 190 1971 326 102 0.31 29.3

July 362 1968 45.2 1971 177 93.0 0.53 15.9

August 112 1968 25.9 1980 55.9 26.9 0.48 5.02

September 38.9 1970 22.9 1980 30.6 4.13 0.13 2.75

Annual 131 1968 58.5 1977 92.6 23.7 0.26 100
125

1-8.L00-3A PANJSHER RIVER AT SHUKHI, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 22.7 22.9 25.0 25.9 24.1 24.5 44.5 70.0 133 37.7 25.6 22.7 24.6

90 24.2 23.9 26.0 28.5 25.1 25.6 50.2 98.5 175 47.6 27.2 23.1 26.3

85 24.4 24.6 28.1 29.5 26.0 27.0 57.5 111 197 57.9 28.5 25.9 27.8

80 25.2 27.1 28.9 30.0 27.2 27.8 64.1 124 216 70.3 30.5 27.0 28.6

75 25.5 27.6 29.5 30.4 27.7 28.6 72.7 134 230 81.1 31.7 27.7 29.4

70 26.2 28.1 30.2 30.7 28.6 29.3 79.7 141 250 94.1 34.3 28.3 30.3

65 26.9 28.5 30.7 31.3 28.8 29.9 87.2 153 262 109 36.0 29.1 31.4

60 27.2 28.8 31.1 32.6 29.0 31.9 96.9 165 284 120 37.9 29.6 32.8

55 27.5 29.1 31.7 34.2 29.5 33.1 105 179 302 135 40.1 29.9 34.3

50 27.7 29.4 32.2 34.7 30.1 34.3 112 194 316 155 43.0 30.3 36.4

45 28.0 29.7 32.5 35.4 30.7 35.4 118 204 336 174 48.4 30.7 39.0

40 28.4 30.1 33.0 36.4 31.9 36.7 127 214 360 192 52.3 31.2 43.8

35 28.8 30.9 33.7 37.3 32.6 38.1 135 226 378 205 56.3 31.6 56.3

30 29.2 31.3 34.5 37.9 33.7 40.3 144 243 392 224 60.2 32.7 81.2

25 29.6 31.9 35.3 39.0 34.8 43.6 160 261 412 239 66.5 33.2 114

20 29.9 32.5 36.1 39.9 35.8 49.4 175 290 437 265 73.0 33.9 152

15 30.2 33.3 37.8 41.5 36.6 58.3 193 312 471 298 83.0 35.0 201

10 30.6 34.2 39.1 42.2 38.2 67.9 213 341 508 349 108 36.1 255

5 32.0 35.4 44.3 44.1 40.8 90.9 248 376 543 422 139 40.1 353
126

1-8.L00-3A PANJSHER RIVER AT SHUKHI, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 318 248 227 200 178

0.95 1.05 375 296 273 242 215

0.90 1.11 409 325 300 267 238

0.80 1.25 453 362 336 300 268

0.50 2 548 440 412 374 338

0.20 5 659 528 499 461 424

0.10 10 724 577 549 514 477

0.04 25 798 633 605 575 541

0.02 50 849 670 644 617 586

0.01 100 897 705 679 658 630

0.005 200 943 737 713 696 673

0.002 500 1,000 ng ng ng ng

1-8.L00-3A PANJSHER RIVER AT SHUKHI, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 20.7 20.8 21.2 21.5 21.9 23.0 24.3 24.9 26.0

0.10 10 21.6 21.7 22.0 22.4 22.8 24.0 25.3 25.9 27.0

0.20 5 22.7 22.8 23.1 23.4 24.0 25.2 26.5 27.2 28.2

0.50 2 24.8 24.9 25.1 25.4 26.2 27.6 28.6 29.6 30.6
127

1-8.L00-3A PANJSHER RIVER AT SHUKHI, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 22.9 23.0 23.5 24.5 22.7 23.0 24.0 27.3

0.10 10 23.9 24.1 24.6 25.6 23.7 23.9 25.1 29.0

0.20 5 25.0 25.4 25.9 27.1 24.9 25.1 26.7 31.5

0.50 2 27.1 27.8 28.5 30.2 27.3 27.9 30.6 38.2

June-July-August September-October-November

0.05 20 23.1 23.3 23.3 23.7 20.6 21.1 21.5 21.8

0.10 10 25.1 25.6 26.2 27.7 21.7 22.1 22.5 22.9

0.20 5 27.8 28.6 30.1 33.6 23.0 23.4 23.8 24.2

0.50 2 33.7 35.6 39.4 49.2 25.5 25.8 26.0 26.7
128

1-8.L00-3A PANJSHER RIVER AT SHUKHI, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1967 June 12, 1967 750 1967 June 12, 1967 750

1968 June 25, 1968 680 1972 June 28, 1972 719

1969 June 20, 1969 626 1973 June 13, 1973 700

1970 June 3, 1970 509 1968 June 25, 1968 680

1971 May 28, 1971 522 1969 June 20, 1969 626

1972 June 28, 1972 719 1978 July 7, 1978 590

1973 June 13, 1973 700 1979 June 22, 1979 558

1974 June 18, 1974 380 1971 May 28, 1971 522

1975 June 17, 1975 451 1970 June 3, 1970 509

1976 June 4, 1976 482 1976 June 4, 1976 482

1977 June 23, 1977 392 1980 June 9, 1980 452

1978 July 7, 1978 590 1975 June 17, 1975 451

1979 June 22, 1979 558 1977 June 23, 1977 392

1980 June 9, 1980 452 1974 June 18, 1974 380
129

1-8.L00-3A PANJSHER RIVER AT SHUKHI, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[Data may not be rounded in accordance with U.S. Geological Survey publication standards] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1967 27.8 28.3 33.8 36.1 25.8 29.6 122 176 390 268 70.0 32.5 103

1968 29.5 30.2 37.2 42.3 36.0 56.1 143 201 493 362 112 34.4 131

1969 29.4 32.1 45.0 44.1 37.2 67.2 164 167 407 312 104 33.5 120

1970 23.6 32.9 32.7 37.7 28.6 34.3 98.3 216 270 125 64.5 38.9 83.6

1971 30.1 28.1 30.2 30.2 28.5 36.8 86.7 241 190 45.2 29.1 29.1 67.2

1972 27.7 22.6 23.9 26.0 24.7 45.0 143 298 492 244 65.1 32.9 120

1973 32.2 32.8 38.2 40.6 36.3 55.3 207 345 439 194 51.1 31.9 125

1974 29.7 29.0 31.6 32.8 31.5 29.0 82.2 136 217 87.9 28.0 27.8 63.5

1975 27.8 27.7 28.8 30.5 30.2 31.9 91.2 145 267 157 53.3 30.1 76.8

1976 25.5 23.8 26.6 28.8 27.8 37.9 123 198 261 173 40.7 30.8 83.1

1977 25.9 28.2 31.2 37.0 35.1 31.1 60.2 95.5 207 88.7 32.6 29.5 58.5

1978 29.3 31.7 31.3 33.9 30.8 35.1 120 230 294 143 39.5 29.9 87.5

1979 26.3 32.5 36.3 33.1 28.8 44.1 138 170 324 193 66.7 23.7 93.2

1980 23.6 31.6 32.0 35.1 36.2 45.1 150 217 315 80.2 25.9 22.9 84.3
130

1-8.L00-5A PANJSHER RIVER AT GULBAHAR

(U.S. Geological Survey identification number: 351000069170000)

LOCATION: Lat 35o10'N., long 69o17'E.

DRAINAGE AREA: 3,565 km2

.

ELEVATION: 1,605 meters above mean sea level.

PERIOD OF RECORD: October 1, 1959 to September 30, 1980.

GAGE: Water-stage recorder.

0

10

20

30

40

50

60

70

80

90

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
131

1-8.L00-5A PANJSHER RIVER AT GULBAHAR, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 27.1 1970 12.3 1964 17.2 3.40 0.20 2.64

November 24.3 1970 10.5 1964 14.4 3.10 0.22 2.20

December 19.3 1970 8.59 1971 12.2 2.48 0.20 1.87

January 17.2 1970 7.24 1971 10.6 2.40 0.23 1.62

February 14.1 1970 7.18 1971 10.4 2.01 0.19 1.59

March 23.4 1968 8.48 1962 13.9 3.55 0.26 2.12

April 62.9 1973 19.1 1977 36.2 10.0 0.28 5.54

May 148 1971 49.8 1977 92.8 27.7 0.30 14.2

June 316 1963 131 1971 219 51.5 0.24 33.5

July 298 1960 47.8 1971 148 60.6 0.41 22.7

August 99.4 1969 30.3 1971 53.9 19.0 0.35 8.26

September 36.3 1969 13.7 1963 24.4 5.61 0.23 3.74

Annual 80.1 1960 33.9 1977 54.5 10.6 0.19 100
132

1-8.L00-5A PANJSHER RIVER AT GULBAHAR, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 12.5 10.9 8.85 7.16 7.06 7.81 14.9 36.5 96.2 48.2 25.3 14.4 8.63

90 13.0 11.1 9.42 7.54 7.49 8.84 16.2 42.6 119 58.1 27.9 16.3 10.0

85 13.3 11.4 9.93 8.03 7.96 9.72 18.1 50.1 137 69.5 30.5 17.7 10.9

80 13.9 11.8 10.2 8.70 8.24 10.5 19.7 55.7 152 78.9 32.8 18.5 11.6

75 14.5 12.0 10.5 9.00 8.91 10.9 21.0 61.4 167 89.1 35.0 19.5 12.4

70 15.4 12.2 10.7 9.21 9.12 11.4 23.0 66.3 177 96.0 36.9 20.1 13.3

65 16.0 12.4 10.9 9.43 9.77 11.9 25.0 70.1 186 102 39.8 21.1 14.4

60 16.3 12.9 11.1 9.78 10.0 12.2 27.0 74.0 197 111 42.2 22.1 15.8

55 16.6 13.2 11.6 10.0 10.2 12.6 29.0 78.1 208 121 45.5 22.8 17.2

50 16.9 13.6 11.8 10.1 10.5 13.1 31.3 83.1 216 130 48.7 23.6 19.3

45 17.2 14.2 12.1 10.2 10.7 13.4 34.2 88.8 224 142 51.3 24.6 22.9

40 17.5 14.9 12.6 10.7 11.0 13.7 37.3 95.3 235 154 53.9 25.4 28.0

35 17.8 15.3 12.9 11.0 11.2 14.3 39.9 102 249 167 57.4 26.2 35.6

30 18.3 15.7 13.1 11.3 11.6 15.0 42.8 110 261 184 60.8 27.5 47.5

25 18.9 16.0 13.6 11.7 11.9 15.5 47.0 118 272 198 67.2 28.8 63.3

20 19.7 16.4 14.1 12.5 12.2 16.2 50.4 129 284 219 71.5 30.1 83.3

15 20.5 17.0 14.9 13.1 12.6 17.6 54.1 142 303 236 78.4 31.6 116

10 21.8 18.0 15.6 14.0 13.0 19.4 61.2 158 326 252 86.5 33.2 164

5 25.6 21.1 17.0 15.2 13.8 22.7 71.2 185 354 277 109 37.0 230
133

1-8.L00-5A PANJSHER RIVER AT GULBAHAR, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 209 179 166 147 125

0.95 1.05 255 209 193 172 152

0.90 1.11 282 227 210 188 168

0.80 1.25 318 250 232 209 189

0.50 2 394 300 281 257 234

0.20 5 483 360 343 317 286

0.10 10 534 395 381 353 316

0.04 25 592 436 427 397 349

0.02 50 631 465 460 429 372

0.01 100 668 492 492 460 393

0.005 200 702 1

518 523 490 413

0.002 500 746 ng ng ng ng

1

Data does not fit log-Pearson Type III curve, use with caution.

1-8.L00-5A PANJSHER RIVER AT GULBAHAR, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 6.39 6.47 6.59 6.72 6.85 7.20 7.60 8.31 10.0

0.10 10 6.89 7.00 7.14 7.28 7.44 7.78 8.18 8.83 10.5

0.20 5 7.53 7.69 7.86 8.01 8.19 8.53 8.94 9.52 11.1

0.50 2 8.91 9.14 9.34 9.52 9.74 10.1 10.6 11.1 12.7
134

1-8.L00-5A PANJSHER RIVER AT GULBAHAR, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 6.43 6.66 6.77 6.93 7.04 7.30 7.68 9.15

0.10 10 6.89 7.20 7.32 7.49 7.76 8.11 8.44 9.85

0.20 5 7.49 7.88 8.02 8.21 8.67 9.13 9.45 10.8

0.50 2 8.84 9.33 9.50 9.74 10.4 11.2 11.6 13.1

June-July-August September-October-November

0.05 20 17.5 19.1 22.8 29.2 9.85 10.2 10.4 10.8

0.10 10 20.5 22.2 25.6 32.7 10.2 10.5 10.7 11.2

0.20 5 24.3 26.3 29.4 37.7 10.7 11.1 11.3 11.8

0.50 2 32.3 34.8 38.3 49.7 12.2 12.6 12.9 13.5
135

1-8.L00-5A PANJSHER RIVER AT GULBAHAR, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1960 July 10, 1960 584 1960 July 10, 1960 584

1961 June 5, 1961 515 1964 July 4, 1964 569

1962 June 10, 1962 488 1963 June 20, 1963 520

1963 June 20, 1963 520 1961 June 5, 1961 515

1964 July 4, 1964 569 1962 June 10, 1962 488

1965 July 15, 1965 300 1979 June 23, 1979 477

1966 June 19, 1966 335 1973 June 13, 1973 473

1967 June 12, 1967 358 1969 June 20, 1969 424

1968 July 8, 1968 412 1978 June 5, 1978 418

1969 June 20, 1969 424 1968 July 8, 1968 412

1970 June 3, 1970 350 1972 June 25, 1972 385

1971 June 9, 1971 321 1967 June 12, 1967 358

1972 June 25, 1972 385 1970 June 3, 1970 350

1973 June 13, 1973 473 1977 June 23, 1977 338

1974 June 16, 1974 292 1966 June 19, 1966 335

1975 June 17, 1975 335 1975 June 17, 1975 335

1976 June 4, 1976 327 1976 June 4, 1976 327

1977 June 23, 1977 338 1971 June 9, 1971 321

1978 June 5, 1978 418 1965 July 15, 1965 300

1979 June 23, 1979 477 1974 June 16, 1974 292

1980 June 9, 1980 220 1980 June 9, 1980 220
136

1-8.L00-5A PANJSHER RIVER AT GULBAHAR, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[Data may not be rounded in accordance with U.S. Geological Survey publication standards] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1960 17.3 15.4 12.2 9.58 10.1 16.2 37.8 110 306 298 93.5 33.5 80.1

1961 20.3 16.1 12.4 9.64 8.07 9.15 25.4 92.4 235 138 52.8 27.7 54.0

1962 17.7 14.7 10.5 8.82 7.84 8.48 24.3 57.8 238 153 48.6 29.5 51.7

1963 17.9 13.4 9.70 7.44 7.57 11.7 27.4 75.6 316 162 41.2 13.7 58.6

1964 12.3 10.5 9.74 7.78 7.46 12.6 40.8 99.7 226 191 54.1 21.6 57.9

1965 15.4 13.4 12.9 11.9 11.7 15.2 38.4 90.6 202 231 68.5 28.2 62.0

1966 22.4 18.1 14.8 10.7 10.6 14.4 39.0 80.7 228 120 56.0 25.1 53.4

1967 16.7 13.0 10.7 9.22 12.9 14.1 35.5 77.1 219 184 72.3 30.5 58.0

1968 17.2 12.9 13.6 13.3 12.2 23.4 37.1 64.2 246 203 73.9 26.3 61.9

1969 20.0 16.8 15.3 13.4 11.7 19.1 37.8 88.9 257 222 99.4 36.3 70.1

1970 27.1 24.3 19.3 17.2 14.1 14.5 41.9 121 177 74.6 48.9 27.8 50.8

1971 15.0 12.0 8.59 7.24 7.18 11.1 34.5 148 131 47.8 30.3 17.4 39.4

1972 13.5 12.0 11.3 8.84 10.0 12.5 21.1 70.9 271 155 50.0 25.0 55.0

1973 17.4 15.5 13.5 11.7 12.5 20.3 62.9 146 280 138 44.5 22.4 65.5

1974 19.3 15.2 12.2 10.2 10.0 12.7 33.1 82.0 152 91.2 31.5 18.2 40.8

1975 13.7 11.5 9.98 9.32 9.20 10.7 31.4 66.4 175 119 52.2 22.6 44.3

1976 16.7 14.8 12.0 11.3 10.9 12.9 38.6 99.2 164 139 46.5 23.7 49.2

1977 15.7 11.8 10.6 10.8 11.2 12.2 19.1 49.8 138 80.2 30.6 16.5 33.9

1978 13.2 11.7 11.1 9.55 9.18 12.6 41.4 138 221 103 44.4 22.0 53.2

1979 14.6 11.6 11.0 10.0 10.5 13.3 53.6 81.4 223 175 62.0 23.6 57.7

1980 18.0 16.7 15.5 13.9 13.0 13.7 38.4 108 189 82.8 31.1 20.5 46.6
137

1-8.L00-8A PANJSHER RIVER AT OMARZ

(U.S. Geological Survey identification number: 352200069380000)

LOCATION: Lat 35o22'N., long 69o38'E.

DRAINAGE AREA: 2,240 km2

.

ELEVATION: 2,010 meters above mean sea level.

PERIOD OF RECORD: October 1, 1962 to February 20, 1963 and June 25, 1963 to September 30, 

1980.

GAGE: Water-stage recorder.

0

5

10

15

20

25

30

35

40

45

50

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
138

1-8.L00-8A PANJSHER RIVER AT OMARZ, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 15.8 1970 7.90 1972 11.9 2.05 0.17 2.95

November 12.4 1973 7.51 1972 9.50 1.55 0.16 2.36

December 10.7 1973 6.04 1975 7.96 1.35 0.17 1.98

January 9.11 1970 5.27 1979 6.85 1.18 0.17 1.71

February 8.72 1970 5.05 1975 6.46 0.92 0.14 1.61

March 10.0 1971 5.55 1975 7.45 1.32 0.18 1.86

April 23.7 1971 10.5 1977 16.3 4.12 0.25 4.05

May 92.4 1971 32.1 1977 50.1 18.1 0.36 12.5

June 190 1973 89.2 1971 131 28.5 0.22 32.5

July 153 1969 34.7 1971 95.8 33.3 0.35 23.9

August 75.5 1969 24.0 1974 40.3 13.2 0.33 10.0

September 27.6 1969 11.9 1971 18.5 3.72 0.20 4.60

Annual 43.7 1969 24.5 1977 33.5 5.80 0.17 100
139

1-8.L00-8A PANJSHER RIVER AT OMARZ, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 8.49 7.02 5.88 5.12 4.96 5.52 7.15 17.3 57.5 35.9 20.2 11.7 5.78

90 9.04 7.43 6.19 5.42 5.40 5.67 8.45 20.1 68.9 41.2 22.7 12.7 6.26

85 9.55 7.78 6.30 5.51 5.67 5.97 9.04 22.5 79.0 46.5 23.9 14.2 6.73

80 9.79 8.10 6.62 5.74 5.77 6.09 9.63 25.4 86.8 55.1 25.1 14.8 7.18

75 10.0 8.22 6.94 6.00 5.85 6.19 10.0 29.1 94.9 62.7 26.8 15.4 7.74

70 10.5 8.37 7.05 6.09 5.92 6.28 10.6 31.9 101 66.8 28.7 15.7 8.38

65 11.0 8.57 7.20 6.19 5.99 6.58 11.4 34.3 108 70.8 31.4 16.1 9.03

60 11.2 8.76 7.51 6.29 6.13 6.69 12.1 36.8 114 75.0 33.2 16.7 9.81

55 11.4 8.92 7.72 6.62 6.22 6.83 13.3 39.9 123 81.4 34.8 17.4 11.0

50 11.7 9.07 8.00 6.82 6.29 6.99 14.2 43.9 130 88.8 36.4 17.8 12.3

45 12.0 9.48 8.13 6.95 6.53 7.27 15.2 48.0 137 95.6 38.5 18.1 14.8

40 12.4 9.77 8.24 7.21 6.63 7.44 16.7 51.0 145 102 40.7 19.2 18.2

35 12.8 10.0 8.38 7.3 6.91 7.62 17.8 54.2 154 108 42.7 20.0 22.0

30 13.0 10.4 8.55 7.46 6.99 7.84 19.2 58.1 161 115 45.0 20.7 28.6

25 13.4 10.6 9.00 7.73 7.08 8.36 20.0 63.2 170 123 49.0 21.4 37.9

20 13.8 11.1 9.18 7.87 7.18 9.02 21.7 69.3 177 139 53.7 22.1 52.1

15 14.4 11.7 9.35 8.08 7.34 9.34 23.3 76.9 185 153 58.3 22.9 70.2

10 14.9 12.1 9.89 8.76 7.65 9.74 26.1 91.2 194 163 62.6 24.9 100

5 15.7 12.7 10.8 8.95 ng 10.8 31.8 109 204 180 71.9 28.3 144
140

1-8.L00-8A PANJSHER RIVER AT OMARZ, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 181 125 113 97.8 82.1

0.95 1.05 202 142 130 114 98.0

0.90 1.11 214 152 139 124 107

0.80 1.25 230 163 151 135 119

0.50 2 264 187 174 160 144

0.20 5 303 213 200 185 172

0.10 10 326 227 214 199 187

0.04 25 353 242 229 214 204

0.02 50 371 252 239 224 216

0.01 100 389 261 248 233 226

0.005 200 405 270 257 241 236

0.002 500 427 ng ng ng ng

1-8.L00-8A PANJSHER RIVER AT OMARZ, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 3.83 4.27 4.63 4.77 4.99 5.15 5.28 5.54 6.55

0.10 10 4.10 4.52 4.83 4.98 5.17 5.35 5.52 5.80 6.85

0.20 5 4.47 4.84 5.11 5.27 5.44 5.62 5.83 6.14 7.24

0.50 2 5.26 5.56 5.76 5.93 6.06 6.26 6.54 6.91 8.13
141

1-8.L00-8A PANJSHER RIVER AT OMARZ, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 3.81 4.6 4.76 4.95 5.06 5.31 5.34 5.55

0.10 10 4.14 4.86 5.02 5.20 5.25 5.53 5.59 5.87

0.20 5 4.57 5.20 5.35 5.54 5.52 5.82 5.92 6.31

0.50 2 5.47 5.94 6.09 6.27 6.14 6.47 6.66 7.26

June-July-August September-October-November

0.05 20 17.7 18.6 18.7 22.5 6.49 6.68 6.76 7.23

0.10 10 18.8 20.0 20.8 25.1 6.79 6.98 7.10 7.6

0.20 5 20.2 21.9 23.6 28.6 7.20 7.39 7.55 8.10

0.50 2 23.8 26.3 29.9 37.4 8.16 8.38 8.61 9.24
142

1-8.L00-8A PANJSHER RIVER AT OMARZ, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1964 July 2, 1964 272 1973 June 12, 1973 342

1965 July 14, 1965 224 1979 June 23, 1979 326

1966 June 19, 1966 300 1968 July 18, 1968 318

1967 June 28, 1967 237 1972 June 21, 1972 306

1968 July 18, 1968 318 1978 July 6, 1978 305

1969 June 20, 1969 279 1966 June 19, 1966 300

1970 June 3, 1970 226 1977 June 22, 1977 284

1971 May 27, 1971 252 1969 June 20, 1969 279

1972 June 21, 1972 306 1964 July 2, 1964 272

1973 June 12, 1973 342 1971 May 27, 1971 252

1974 June 16, 1974 219 1967 June 28, 1967 237

1975 June 15, 1975 228 1975 June 15, 1975 228

1976 July 8, 1976 210 1970 June 3, 1970 226

1977 June 22, 1977 284 1965 July 14, 1965 224

1978 July 6, 1978 305 1974 June 16, 1974 219

1979 June 23, 1979 326 1980 June 11, 1980 213

1980 June 11, 1980 213 1976 July 8, 1976 210
143

1-8.L00-8A PANJSHER RIVER AT OMARZ, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[--, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1963 12.1 10.4 8.71 7.61 -- -- -- -- -- 105 41.1 19.4 --

1964 14.8 10.9 8.32 7.43 7.58 8.45 14.5 45.3 130 126 52.7 20.2 37.2

1965 11.0 7.64 6.21 6.20 6.02 8.53 12.6 42.1 139 140 53.0 22.6 38.1

1966 12.9 11.4 9.67 8.39 6.67 6.82 13.8 54.1 143 93.8 45.7 21.7 35.8

1967 11.9 8.68 6.79 5.79 5.97 6.07 11.5 33.3 126 113 42.3 19.5 32.7

1968 11.2 8.19 7.19 6.72 6.42 7.65 17.2 34.4 161 142 54.2 19.0 39.6

1969 13.8 10.2 9.25 7.26 7.08 9.56 20.5 38.4 149 153 75.5 27.6 43.7

1970 15.8 12.2 9.73 9.11 8.72 9.27 19.4 63.9 103 53.3 37.3 21.8 30.4

1971 11.8 9.52 7.77 6.09 6.47 10.0 23.7 92.4 89.2 34.7 25.1 11.9 27.5

1972 7.90 7.51 6.08 5.34 5.67 7.28 12.3 34.3 151 104 40.9 19.6 33.5

1973 14.7 12.4 10.7 8.71 7.19 7.15 21.1 79.1 190 106 36.4 17.4 42.6

1974 10.4 8.16 7.40 6.00 6.03 7.56 14.8 41.7 101 67.5 24.0 13.2 25.7

1975 9.50 7.63 6.04 5.51 5.05 5.55 12.5 35.8 113 86.0 37.6 16.0 28.4

1976 9.71 8.05 7.08 5.90 5.63 5.79 13.0 45.3 95.0 92.6 32.1 18.1 28.3

1977 12.5 10.1 8.84 7.82 6.84 7.10 10.5 32.1 98.8 57.5 25.8 15.2 24.5

1978 9.74 8.78 8.05 7.26 6.93 7.32 19.4 73.4 168 80.6 31.5 17.6 36.6

1979 12.1 9.56 7.18 5.27 5.08 6.23 21.9 41.4 142 113 45.2 17.5 35.6

1980 11.6 9.68 8.21 6.95 6.51 6.42 17.6 63.8 123 56.8 24.2 14.5 29.1
144

1-9.R00-4W CHAKARI RIVER AT BAND-I-AMIR GHAZI

(U.S. Geological Survey identification number: 342500069230000)

LOCATION: Lat 34o25'N., long 69o23'E.

DRAINAGE AREA: 395 km2

.

ELEVATION: 2,050 meters above mean sea level.

PERIOD OF RECORD: May 26, 1965 to September 30, 1980.

GAGE: Staff gage.

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
145

1-9.R00-4W CHAKARI RIVER AT BAND-I-AMIR GHAZI, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 0.68 1968 0.05 1972 0.33 0.17 0.53 8.80

November 1.06 1968 0.10 1971 0.34 0.24 0.73 9.06

December 0.94 1968 0.02 1978 0.15 0.22 1.53 3.95

January 0.25 1967 0.01 1978 0.05 0.06 1.33 1.22

February 0.38 1967 0.01 1978 0.10 0.11 1.17 2.57

March 0.62 1980 0.01 1977 0.18 0.21 1.20 4.80

April 1.71 1980 0.03 1975 0.44 0.40 0.89 12.0

May 0.96 1967 0.05 1975 0.55 0.26 0.47 14.9

June 0.93 1974 0.04 1971 0.52 0.29 0.56 14.0

July 0.97 1980 0.03 1971 0.39 0.23 0.58 10.7

August 0.94 1980 0.05 1971 0.34 0.22 0.65 9.14

September 0.86 1979 0.06 1971 0.33 0.20 0.59 8.99

Annual 0.58 1980 0.11 1971 0.31 0.12 0.39 100
146

1-9.R00-4W CHAKARI RIVER AT BAND-I-AMIR GHAZI, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 0.06 0.07 0.02 0.01 0.01 0.01 0.02 0.07 0.04 0.03 0.05 0.05 0.02

90 0.08 0.10 0.02 0.02 0.02 0.02 0.03 0.13 0.07 0.12 0.07 0.07 0.02

85 0.12 0.12 0.02 0.02 0.02 0.02 0.09 0.25 0.23 0.14 0.11 0.10 0.03

80 0.19 0.13 0.02 0.02 0.02 0.02 0.13 0.25 0.24 0.21 0.13 0.20 0.04

75 0.20 0.15 0.03 0.02 0.02 0.03 0.14 0.34 0.31 0.23 0.20 0.21 0.06

70 0.21 0.16 0.03 0.02 0.03 0.03 0.17 0.41 0.35 0.24 0.22 0.22 0.08

65 0.24 0.22 0.03 0.02 0.03 0.03 0.25 0.48 0.38 0.26 0.23 0.24 0.13

60 0.25 0.23 0.04 0.03 0.04 0.04 0.31 0.49 0.41 0.31 0.25 0.25 0.17

55 0.29 0.25 0.04 0.03 0.04 0.04 0.40 0.50 0.45 0.33 0.30 0.26 0.22

50 0.30 0.26 0.05 0.03 0.05 0.05 0.44 0.51 0.47 0.34 0.32 0.31 0.25

45 0.31 0.31 0.05 0.03 0.05 0.10 0.46 0.52 0.49 0.36 0.33 0.32 0.27

40 0.32 0.33 0.06 0.03 0.06 0.15 0.48 0.57 0.51 0.38 0.35 0.34 0.30

35 0.34 0.36 0.07 0.04 0.07 0.19 0.49 0.67 0.56 0.41 0.38 0.36 0.34

30 0.36 0.39 0.09 0.04 0.10 0.20 0.51 0.71 0.72 0.44 0.41 0.38 0.40

25 0.39 0.42 0.12 0.05 0.14 0.26 0.54 0.75 0.80 0.48 0.44 0.40 0.44

20 0.44 0.48 0.15 0.05 0.18 0.37 0.58 0.82 0.87 0.53 0.47 0.44 0.48

15 0.48 0.51 0.23 0.06 0.23 0.40 0.71 0.88 0.93 0.60 0.50 0.50 0.53

10 0.51 0.67 0.31 0.07 0.30 0.53 0.79 1.01 1.00 0.79 0.52 0.54 0.75

5 0.86 0.90 0.82 0.20 0.37 0.62 1.58 1.13 1.07 0.96 0.69 0.80 0.95
147

1-9.R00-4W CHAKARI RIVER AT BAND-I-AMIR GHAZI, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 0.30 0.27 0.27 0.25 0.24

0.95 1.05 0.40 0.39 0.39 0.36 0.34

0.90 1.11 0.50 0.47 0.47 0.44 0.42

0.80 1.25 0.60 0.59 0.59 0.55 0.52

0.50 2 1.00 0.90 0.89 0.85 0.78

0.20 5 1.40 1.34 1.32 1.27 1.14

0.10 10 1.70 1.64 1.61 1.55 1.38

0.04 25 2.00 2.03 1.99 1.92 1.68

0.02 50 2.20 2.31 2.27 2.19 1.89

0.01 100 2.40 2.60 2.55 2.46 2.11

0.005 200 2.60 2.89 2.83 2.73 2.32

0.002 500 2.90 ng ng ng ng

1-9.R00-4W CHAKARI RIVER AT BAND-I-AMIR GHAZI, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 0 0 0 0.01 0.01 0.01 0.01 0.02 0.05

0.10 10 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.02 0.07

0.20 5 0.01 0.01 0.01 0.01 0.01 0.02 0.02 0.03 0.09

0.50 2 0.01 0.01 0.01 0.02 0.02 0.03 0.03 0.06 0.15
148

1-9.R00-4W CHAKARI RIVER AT BAND-I-AMIR GHAZI, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01

0.10 10 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01

0.20 5 0.01 0.01 0.01 0.01 0.02 0.02 0.02 0.02

0.50 2 0.02 0.02 0.02 0.02 0.05 0.05 0.05 0.07

June-July-August September-October-November

0.05 20 0.01 0.01 0.02 0.04 0 0 0.04 0.06

0.10 10 0.01 0.02 0.03 0.07 0.01 0.01 0.06 0.08

0.20 5 0.03 0.04 0.06 0.13 0.03 0.04 0.08 0.12

0.50 2 0.11 0.13 0.18 0.27 0.11 0.12 0.16 0.22
149

1-9.R00-4W CHAKARI RIVER AT BAND-I-AMIR GHAZI, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1966 May 1, 1966 1.00 1980 April 17, 1980 1.92

1967 May 23, 1967 1.26 1968 December 9, 1967 1.67

1968 December 9, 1967 1.67 1979

September 13, 

1979 1.43

1969 March 13, 1968 0.55 1972 June 18, 1972 1.36

1970 July 17, 1970 0.96 1967 May 23, 1967 1.26

1971 May 1, 1971 0.55 1978 June 9, 1978 1.19

1972 June 18, 1972 1.36 1974 June 8, 1974 1.06

1973 April 21, 1973 0.55 1966 May 1, 1966 1.00

1974 June 8, 1974 1.06 1970 July 17, 1970 0.96

1975 June 8, 1975 0.39 1976 May 17, 1976 0.82

1976 May 17, 1976 0.82 1977 August 9, 1977 0.82

1977 August 9, 1977 0.82 1969 March 13, 1968 0.55

1978 June 9, 1978 1.19 1971 May 1, 1971 0.55

1979

September 13, 

1979 1.43 1973 April 21, 1973 0.55

1980 April 17, 1980 1.92 1975 June 8, 1975 0.39
150

1-9.R00-4W CHAKARI RIVER AT BAND-I-AMIR GHAZI, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[Data may not be rounded in accordance with U.S. Geological Survey publication standards; --, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1965 -- -- -- -- -- -- -- -- 0.76 0.57 0.49 0.42 --

1966 0.44 0.43 0.19 0.07 0.31 0.59 0.74 0.58 0.41 0.29 0.29 0.22 0.38

1967 0.35 0.33 0.05 0.25 0.38 0.40 0.33 0.96 0.90 0.54 0.32 0.46 0.44

1968 0.68 1.06 0.94 0.05 0.05 0.03 0.34 0.48 0.26 0.25 0.36 0.32 0.40

1969 0.23 0.19 0.12 0.03 0.14 0.38 0.42 0.47 0.40 0.43 0.44 0.30 0.30

1970 0.29 0.39 0.07 0.03 0.15 0.19 0.37 0.31 0.22 0.15 0.11 0.08 0.20

1971 0.07 0.10 0.04 0.02 0.04 0.03 0.43 0.39 0.04 0.03 0.05 0.06 0.11

1972 0.05 0.15 0.07 0.04 0.06 0.10 0.43 0.85 0.86 0.27 0.20 0.20 0.27

1973 0.20 0.10 0.05 0.05 0.03 0.03 0.28 0.47 0.50 0.49 0.34 0.34 0.24

1974 0.28 0.25 0.09 0.03 0.09 0.18 0.56 0.84 0.93 0.72 0.34 0.28 0.38

1975 0.25 0.30 0.13 0.01 0.02 0.02 0.03 0.05 0.26 0.30 0.30 0.29 0.16

1976 0.43 0.22 0.06 0.02 0.02 0.07 0.46 0.77 0.76 0.24 0.26 0.31 0.30

1977 0.24 0.52 0.15 0.02 0.01 0.01 0.36 0.52 0.41 0.37 0.66 0.62 0.32

1978 0.34 0.20 0.02 0.01 0.01 0.01 0.08 0.45 0.89 0.28 0.23 0.26 0.23

1979 0.45 0.56 0.16 0.01 0.02 0.02 0.11 0.24 0.26 0.42 0.09 0.86 0.27

1980 0.59 0.23 0.07 0.04 0.11 0.62 1.71 0.88 0.43 0.97 0.94 0.35 0.58
151

1-11.1L0-4W QARGHA RIVER BELOW QARGHA RESERVOIR

(U.S. Geological Survey identification number: 343300069020000)

LOCATION: Lat 34o33'N., long 69o02'E.

DRAINAGE AREA: 115 km2.

ELEVATION: 1,950 meters above mean sea level.

PERIOD OF RECORD: October 1, 1964 to September 30, 1980.

GAGE: Water-stage recorder.

0.00

0.05

0.10

0.15

0.20

0.25

0.30

0.35

0.40

0.45

0.50

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
152

1-11.1L0-4W QARGHA RIVER BELOW QARGHA RESERVOIR, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 0.60 1974 0.07 1972 0.24 0.13 0.55 9.26

November 0.37 1974 0.06 1970 0.15 0.09 0.62 5.84

December 0.33 1965 0.03 1976 0.09 0.07 0.78 3.55

January 0.28 1965 0.02 1976 0.08 0.06 0.76 3.08

February 0.31 1965 0.02 1976 0.09 0.07 0.79 3.51

March 0.31 1965 0.03 1976 0.10 0.07 0.73 3.76

April 0.42 1965 0.05 1976 0.13 0.09 0.67 5.21

May 0.88 1972 0.12 1977 0.32 0.23 0.71 12.5

June 0.97 1965 0.20 1975 0.38 0.23 0.60 14.8

July 0.54 1973 0.13 1966 0.33 0.11 0.34 12.9

August 0.62 1965 0.14 1969 0.34 0.12 0.34 13.3

September 0.68 1965 0.10 1971 0.32 0.15 0.46 12.3

Annual 0.47 1965 0.13 1971 0.22 0.08 0.37 100
153

1-11.1L0-4W QARGHA RIVER BELOW QARGHA RESERVOIR, Continued 

Monthly and annual flow duration, in cubic meters per second 

[ng, not given] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 0.07 0.04 0.03 0.03 0.03 0.03 0.04 0.09 0.17 0.15 0.13 0.10 0.04

90 0.08 0.06 0.04 0.03 0.03 0.04 0.05 0.11 0.20 0.19 0.16 0.12 0.05

85 0.09 0.06 0.04 0.04 0.04 0.04 0.06 0.13 0.20 0.21 0.21 0.15 0.06

80 0.12 0.07 0.05 0.04 0.04 0.04 0.07 0.14 0.21 0.22 0.24 0.20 0.07

75 0.15 0.07 0.05 0.04 0.04 0.05 0.08 0.16 0.21 0.25 0.27 0.23 0.08

70 0.17 0.08 0.06 0.05 0.05 0.05 0.09 0.17 0.25 0.26 0.30 0.24 0.10

65 0.19 0.09 0.06 0.05 0.05 0.06 0.10 0.18 0.26 0.28 0.31 0.26 0.11

60 0.20 0.10 0.07 0.06 0.06 0.07 0.10 0.19 0.27 0.30 0.31 0.29 0.13

55 0.21 0.10 0.07 0.06 0.07 0.09 0.11 0.21 0.29 0.31 0.32 0.30 0.14

50 0.23 0.12 0.07 0.07 0.07 0.09 0.12 0.22 0.31 0.32 0.34 0.32 0.16

45 0.25 0.13 0.08 0.07 0.09 0.10 0.12 0.24 0.33 0.35 0.35 0.33 0.19

40 0.26 0.15 0.08 0.08 0.09 0.10 0.13 0.26 0.36 0.36 0.35 0.34 0.22

35 0.28 0.17 0.09 0.09 0.10 0.10 0.13 0.28 0.37 0.40 0.37 0.36 0.26

30 0.30 0.20 0.10 0.09 0.12 0.11 0.13 0.30 0.40 0.41 0.40 0.37 0.29

25 0.32 0.22 0.12 0.10 0.13 0.12 0.14 0.34 0.44 0.42 0.43 0.38 0.32

20 0.33 0.26 0.13 0.10 0.13 0.13 0.16 0.41 0.52 0.43 0.45 0.41 0.34

15 0.35 0.28 0.14 0.12 0.14 0.15 0.20 0.50 0.60 0.47 0.49 0.47 0.39

10 0.42 0.32 0.16 0.15 0.18 0.20 0.27 0.64 0.69 0.52 0.51 0.50 0.44

5 ng 0.37 ng ng 0.28 0.27 0.39 1.05 0.93 0.58 0.59 0.65 0.56
154

1-11.1L0-4W QARGHA RIVER BELOW QARGHA RESERVOIR, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 0.40 0.35 0.32 0.29 0.25

0.95 1.05 0.40 0.37 0.34 0.32 0.28

0.90 1.11 0.40 0.38 0.36 0.34 0.30

0.80 1.25 0.50 0.42 0.40 0.37 0.33

0.50 2 0.70 0.54 0.53 0.49 0.43

0.20 5 1.30 0.87 0.82 0.72 0.62

0.10 10 2.10 1.22 1.11 0.92 0.79

0.04 25 4.00 1.87 1.62 1.26 1.05

0.02 50 6.50 2.59 2.14 1.58 1.28

0.01 100 10.6 3.56 2.82 1.97 1.56

0.005 200 17.0 4.87 3.70 2.45 1.89

0.002 500 32.0 ng ng ng ng

1-11.1L0-4W QARGHA RIVER BELOW QARGHA RESERVOIR, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 0.02 0.02 0.02 0.02 0.02 0.03 0.03 0.03 0.06

0.10 10 0.02 0.03 0.03 0.03 0.03 0.03 0.03 0.04 0.07

0.20 5 0.03 0.03 0.03 0.03 0.03 0.04 0.04 0.05 0.08

0.50 2 0.03 0.04 0.04 0.04 0.04 0.05 0.06 0.07 0.11
155

1-11.1L0-4W QARGHA RIVER BELOW QARGHA RESERVOIR, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 0.02 0.02 0.02 0.02 0.03 0.03 0.03 0.03

0.10 10 0.02 0.02 0.03 0.03 0.03 0.03 0.03 0.04

0.20 5 0.03 0.03 0.03 0.03 0.03 0.04 0.04 0.05

0.50 2 0.04 0.04 0.04 0.05 0.05 0.06 0.06 0.07

June-July-August September-October-November

0.05 20 0.08 0.08 0.09 0.13 0.03 0.03 0.04 0.06

0.10 10 0.10 0.10 0.11 0.15 0.03 0.03 0.05 0.07

0.20 5 0.13 0.13 0.14 0.18 0.04 0.04 0.06 0.08

0.50 2 0.19 0.21 0.22 0.25 0.06 0.07 0.08 0.11
156

1-11.1L0-4W QARGHA RIVER BELOW QARGHA RESERVOIR, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1965 May 11, 1965 1.27 1972 May 14, 1972 5.90

1966 August 22, 1966 0.44 1978 July 6, 1978 3.06

1967 June 18, 1967 0.58 1965 May 11, 1965 1.27

1968 May 2, 1968 1.20 1968 May 2, 1968 1.20

1969 June 1, 1969 0.93 1969 June 1, 1969 0.93

1970 June 20, 1970 0.63 1973 July 18, 1973 0.70

1971 June 7, 1971 0.50 1976 May 18, 1976 0.65

1972 May 14, 1972 5.90 1970 June 20, 1970 0.63

1973 July 18, 1973 0.70 1974 October 1, 1973 0.60

1974 October 1, 1973 0.60 1967 June 18, 1967 0.58

1975 August 21, 1975 0.55 1979 July 11, 1979 0.56

1976 May 18, 1976 0.65 1975 August 21, 1975 0.55

1977 October 18, 1976 0.45 1971 June 7, 1971 0.50

1978 July 6, 1978 3.06 1980 July 28, 1980 0.48

1979 July 11, 1979 0.56 1977

October 18, 

1976 0.45

1980 July 28, 1980 0.48 1966 August 22, 1966 0.44
157

1-11.1L0-4W QARGHA RIVER BELOW QARGHA RESERVOIR, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[Data may not be rounded in accordance with U.S. Geological Survey publication standards] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1965 0.15 0.33 0.33 0.28 0.31 0.31 0.42 0.75 0.97 0.53 0.62 0.68 0.47

1966 0.37 0.14 0.12 0.09 0.12 0.12 0.13 0.17 0.28 0.13 0.33 0.27 0.19

1967 0.25 0.27 0.10 0.07 0.09 0.09 0.07 0.28 0.39 0.43 0.45 0.34 0.24

1968 0.27 0.09 0.09 0.10 0.12 0.10 0.23 0.65 0.61 0.44 0.31 0.24 0.27

1969 0.13 0.11 0.13 0.14 0.18 0.19 0.22 0.27 0.35 0.23 0.14 0.11 0.18

1970 0.08 0.06 0.05 0.07 0.12 0.11 0.11 0.21 0.35 0.33 0.30 0.26 0.17

1971 0.21 0.08 0.06 0.04 0.06 0.07 0.11 0.22 0.20 0.26 0.14 0.10 0.13

1972 0.07 0.08 0.07 0.08 0.03 0.04 0.10 0.88 0.83 0.38 0.45 0.23 0.27

1973 0.16 0.21 0.04 0.04 0.06 0.12 0.11 0.22 0.44 0.54 0.42 0.53 0.24

1974 0.60 0.37 0.08 0.03 0.06 0.05 0.11 0.21 0.20 0.21 0.24 0.28 0.20

1975 0.19 0.07 0.06 0.06 0.04 0.04 0.06 0.14 0.20 0.27 0.37 0.32 0.15

1976 0.19 0.09 0.03 0.02 0.02 0.03 0.05 0.35 0.23 0.36 0.34 0.33 0.17

1977 0.31 0.10 0.04 0.06 0.04 0.08 0.11 0.12 0.22 0.29 0.30 0.24 0.16

1978 0.22 0.13 0.07 0.07 0.09 0.10 0.10 0.24 0.24 0.27 0.34 0.34 0.18

1979 0.28 0.14 0.07 0.09 0.08 0.06 0.11 0.14 0.26 0.31 0.39 0.46 0.20

1980 0.36 0.15 0.12 0.05 0.04 0.04 0.14 0.33 0.35 0.36 0.36 0.34 0.22
158

1-11.1L0-5W QARGHA RIVER ABOVE QARGHA RESERVOIR

(U.S. Geological Survey identification number: 343400069010000)

LOCATION: Lat 34o34'N., long 69o01'E.

DRAINAGE AREA: 70 km2.

ELEVATION: 2,035 meters above mean sea level.

PERIOD OF RECORD: April 16, 1963 to September 30, 1966 and March 18, 1970 to

September 30, 1980.

GAGE: Water-stage recorder.

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
159

1-11.1L0-5W QARGHA RIVER ABOVE QARGHA RESERVOIR, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second; ng, not given] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 0.06 1973 0 ng 0 0.02 3.61 0.12

November 0.11 1973 0 ng 0.01 0.03 3.61 0.21

December 0.12 1973 0 ng 0.01 0.04 2.62 0.35

January 0.32 1980 0 ng 0.04 0.09 2.22 1.03

February 0.29 1977 0 ng 0.09 0.11 1.22 2.28

March 1.23 1976 0.05 1964 0.62 0.36 0.58 16.0

April 3.35 1980 0.86 1964 1.93 0.82 0.42 49.7

May 1.82 1979 0 1977 0.87 0.56 0.65 22.4

June 1.18 1972 0 ng 0.20 0.34 1.67 5.21

July 0.48 1965 0 ng 0.10 0.18 1.83 2.50

August 0.16 1978 0 ng 0.01 0.04 3.87 0.27

September 0.00 1963 0 ng 0 0 ng 0

Annual 0.61 1972 0.14 1971 0.33 0.13 0.39 100
160

1-11.1L0-5W QARGHA RIVER ABOVE QARGHA RESERVOIR, Continued 

Monthly and annual flow duration, in cubic meters per second 

[ng, not given] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 0 0 0 0 0 0.01 0.55 0 0 0 0 0 0

90 0 0 0 0 0 0.02 0.73 0 0 0 0.01 0 0

85 0 0.01 0 0 0 0.03 0.81 0.01 0 0 0.02 0 0

80 0 0.02 0 0 0 0.04 0.91 0.02 0 0 0.02 0 0

75 0 0.02 0 0 0 0.06 1.04 0.08 0 0 0.03 0 0

70 0 0.03 0 0 0 0.09 1.20 0.23 0 0 0.03 0 0

65 0 0.03 0 0 0 0.13 1.38 0.40 0 0 0.04 0 0

60 0 0.04 0 0 0.01 0.21 1.49 0.57 0 0 0.04 0 0

55 0 0.04 0 0 0.02 0.33 1.60 0.64 0 0 0.05 0 0

50 0 0.05 0 0 0.02 0.47 1.73 0.77 0 0 0.05 0 0

45 0 0.05 0 0 0.04 0.56 1.87 0.85 0 0 0.06 0 0

40 0 0.06 0 0 0.05 0.67 2.02 0.93 0.02 0 0.06 0 0

35 0 0.06 0 0 0.07 0.77 2.17 1.02 0.07 0 0.07 0 0.02

30 0 0.07 0 0.01 0.10 0.87 2.36 1.11 0.17 0 0.07 0 0.08

25 0 0.07 0 0.02 0.12 0.99 2.58 1.29 0.30 0 0.08 0 0.17

20 0 0.08 0 0.06 0.15 1.14 2.87 1.53 0.42 0 0.08 0 0.48

15 0 0.08 0 0.08 0.21 1.28 3.21 1.75 0.54 0.10 0.09 0 0.84

10 0 0.09 0.05 0.10 0.28 1.45 3.69 1.93 0.77 0.42 0.09 0 1.20

5 0.02 0.10 0.06 0.11 0.43 1.78 4.19 2.49 1.00 0.56 0.10 0 1.90
161

1-11.1L0-5W QARGHA RIVER ABOVE QARGHA RESERVOIR, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 1.70 1.51 1.31 1.03 0.90

0.95 1.05 2.30 1.94 1.65 1.33 1.13

0.90 1.11 2.70 2.20 1.87 1.52 1.27

0.80 1.25 3.20 2.54 2.17 1.79 1.48

0.50 2 4.20 3.32 2.88 2.47 2.00

0.20 5 5.30 4.26 3.83 3.43 2.73

0.10 10 5.90 4.81 4.44 4.08 3.23

0.04 25 6.60 5.45 5.20 4.93 3.89

0.02 50 7.00 5.89 5.76 5.57 4.39

0.01 100 7.30 1

6.30 6.32 6.23 4.90

0.005 200 7.60 1

6.69 16.87 6.90 5.44

0.002 500 8.00 ng ng ng ng

1

Data does not fit log-Pearson Type III curve, use with caution.

1-11.1L0-5W QARGHA RIVER ABOVE QARGHA RESERVOIR, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second; ng, not given] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 ng ng ng ng ng ng ng ng ng

0.10 10 ng ng ng ng ng ng ng ng ng

0.20 5 ng ng ng ng ng ng ng ng ng

0.50 2 ng ng ng ng ng ng ng ng ng
162

1-11.1L0-5W QARGHA RIVER ABOVE QARGHA RESERVOIR, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second; ng, not given] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 

December-JanuaryFebruary March-April-May

0.05 20 ng ng ng ng 0 0 0 0

0.10 10 ng ng ng ng 0 0 0 0.01

0.20 5 ng ng ng ng 0 0 0 0.04

0.50 2 ng ng ng ng 0 0.01 0.03 0.35

June-July-August September-October-November

0.05 20 ng ng ng ng ng ng ng ng

0.10 10 ng ng ng ng ng ng ng ng

0.20 5 ng ng ng ng ng ng ng ng

0.50 2 ng ng ng ng ng ng ng ng
163

1-11.1L0-5W QARGHA RIVER ABOVE QARGHA RESERVOIR, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1963 May 12, 1963 3.34 1966 April 24, 1966 6.15

1964 May 8, 1964 4.31 1980 April 5, 1980 6.11

1965 April 21, 1965 3.30 1974 March 21, 1974 5.60

1966 April 24, 1966 6.15 1972 April 7, 1972 5.25

1970 May 1, 1970 4.80 1978 July 6, 1978 5.00

1971 April 16, 1971 2.50 1970 May 1, 1970 4.80

1972 April 7, 1972 5.25 1964 May 8, 1964 4.31

1973 April 2, 1973 2.08 1979 May 19, 1979 4.10

1974 March 21, 1974 5.60 1976 April 22, 1976 4.00

1975 April 4, 1975 3.50 1977 April 15, 1977 3.55

1976 April 22, 1976 4.00 1975 April 4, 1975 3.50

1977 April 15, 1977 3.55 1963 May 12, 1963 3.34

1978 July 6, 1978 5.00 1965 April 21, 1965 3.30

1979 May 19, 1979 4.10 1971 April 16, 1971 2.50

1980 April 5, 1980 6.11 1973 April 2, 1973 2.08
164

1-11.1L0-5W QARGHA RIVER ABOVE QARGHA RESERVOIR, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[Data may not be rounded in accordance with U.S. Geological Survey publication standards; --, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1963 -- -- -- -- -- -- -- 1.43 0.21 0 0 0 --

1964 0 0 0 0 0 0.05 0.86 1.07 0.12 0 0 0 0.18

1965 0 0 0 0 0.01 0.28 1.39 0.96 0.71 0.48 0 0 0.32

1966 0 0 0 0.01 0.17 1.03 2.47 1.31 0.36 0.18 0 0 0.46

1970 -- -- -- -- -- -- 1.31 0.63 0 0 0 0 --

1971 0 0 0 0 0.01 0.45 1.19 0.01 0 0 0 0 0.14

1972 0 0 0 0 0 0.96 3.15 1.74 1.18 0.35 0 0 0.61

1973 0.06 0.11 0.12 0 0.05 1.05 0.92 1.03 0.37 0 0 0 0.31

1974 0 0 0 0 0.01 0.79 1.53 0.64 0.06 0 0 0 0.25

1975 0 0 0 0 0 0.29 1.69 0.89 0.03 0 0 0 0.24

1976 0 0 0.05 0.10 0.27 1.23 2.95 0.69 0 0 0 0 0.44

1977 0 0 0 0.03 0.29 0.53 2.12 0 0 0 0 0 0.25

1978 0 0 0 0.05 0.07 0.64 2.30 0.62 0 0.45 0.16 0 0.36

1979 0 0 0 0.01 0.21 0.45 1.75 1.82 0 0 0 0 0.35

1980 0 0 0.00 0.32 0.06 0.32 3.35 0.17 0 0 0 0 0.35
165

1-11.L00-1A PAGHMAN RIVER AT PUL-I-SOKHTA

(U.S. Geological Survey identification number: 343000069080000)

LOCATION: Lat 34o30'N., long 69o08'E.

DRAINAGE AREA: 500 km2

.

ELEVATION: 1,805 meters above mean sea level.

PERIOD OF RECORD: March 1, 1963 to September 30, 1980.

GAGE: Water-stage recorder.

0.00

0.20

0.40

0.60

0.80

1.00

1.20

1.40

1.60

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
166

1-11.L00-1A PAGHMAN RIVER AT PUL-I-SOKHTA, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 0.32 1969 0.00 1973 0.09 0.09 1.03 1.06

November 0.72 1970 0.01 1972 0.22 0.24 1.06 2.59

December 0.88 1968 0.04 1972 0.37 0.30 0.82 4.23

January 1.16 1966 0.07 1972 0.44 0.30 0.69 5.14

February 1.20 1966 0.07 1972 0.48 0.28 0.59 5.50

March 2.77 1968 0.38 1977 1.22 0.71 0.58 14.1

April 8.88 1964 0.21 1970 3.64 2.66 0.73 42.0

May 6.55 1965 0.03 1978 1.68 2.03 1.21 19.4

June 1.12 1965 0.01 1966 0.18 0.28 1.59 2.06

July 0.79 1978 0.01 1966 0.17 0.22 1.32 1.94

August 0.34 1975 0.01 1977 0.10 0.10 1.02 1.14

September 0.32 1968 0 1966 0.08 0.09 1.11 0.89

Annual 1.51 1965 0.19 1971 0.72 0.41 0.56 100
167

1-11.L00-1A PAGHMAN RIVER AT PUL-I-SOKHTA, Continued 

Monthly and annual flow duration, in cubic meters per second 

[ng, not given] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 0 0.01 0.02 0.07 0.08 0.22 0.10 0.02 0.01 0.01 0.01 0 0.01

90 0.01 0.01 0.03 0.13 0.20 0.36 0.22 0.03 0.01 0.01 0.01 0 0.02

85 0.01 0.01 0.05 0.18 0.22 0.44 0.56 0.04 0.02 0.02 0.02 0.01 0.02

80 0.01 0.02 0.08 0.20 0.22 0.50 0.89 0.05 0.02 0.02 0.02 0.01 0.03

75 0.02 0.02 0.09 0.22 0.23 0.57 1.18 0.06 0.03 0.02 0.02 0.02 0.04

70 0.02 0.02 0.13 0.23 0.27 0.63 1.41 0.09 0.03 0.03 0.02 0.02 0.06

65 0.02 0.03 0.17 0.26 0.29 0.68 1.62 0.12 0.04 0.03 0.03 0.02 0.08

60 0.02 0.04 0.19 0.29 0.36 0.74 1.85 0.14 0.05 0.04 0.03 0.03 0.11

55 0.03 0.06 0.22 0.31 0.38 0.81 2.10 0.16 0.06 0.05 0.04 0.04 0.14

50 0.04 0.14 0.25 0.33 0.41 0.96 2.50 0.27 0.07 0.05 0.05 0.05 0.18

45 0.08 0.17 0.31 0.37 0.43 1.03 2.82 0.36 0.09 0.06 0.07 0.07 0.23

40 0.11 0.20 0.49 0.50 0.48 1.11 3.13 0.49 0.11 0.08 0.08 0.08 0.28

35 0.13 0.24 0.57 0.56 0.55 1.24 3.55 0.78 0.12 0.11 0.09 0.09 0.36

30 0.15 0.30 0.60 0.62 0.60 1.37 4.09 1.22 0.13 0.13 0.11 0.10 0.47

25 0.17 0.36 0.63 0.67 0.64 1.49 5.06 1.72 0.16 0.14 0.13 0.12 0.60

20 0.18 0.42 0.66 0.72 0.72 1.79 6.24 2.48 0.19 0.16 0.15 0.14 0.74

15 0.20 0.50 0.71 0.77 0.77 2.15 7.47 3.65 0.26 0.21 0.17 0.15 0.97

10 0.25 0.66 0.77 0.91 0.83 2.59 8.84 4.76 0.46 0.44 0.21 0.19 1.56

5 0.32 0.80 0.91 ng 1.15 3.53 11.0 8.34 1.05 0.55 0.27 0.31 3.40
168

1-11.L00-1A PAGHMAN RIVER AT PUL-I-SOKHTA, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 1.80 0.89 0.63 0.45 0.39

0.95 1.05 3.40 1.70 1.25 0.97 0.80

0.90 1.11 4.70 2.37 1.79 1.41 1.14

0.80 1.25 7.20 3.50 2.71 2.20 1.73

0.50 2 16.0 7.13 5.81 4.78 3.65

0.20 5 35.6 13.9 11.9 9.57 7.18

0.10 10 54.3 19.4 16.9 13.3 9.95

0.04 25 85.0 27.2 24.4 18.6 13.8

0.02 50 114 33.7 30.7 22.7 16.9

0.01 100 148 40.6 37.6 27.0 20.1

0.005 200 188 48.1 45.0 31.4 23.5

0.002 500 251 ng ng ng ng

1-11.L00-1A PAGHMAN RIVER AT PUL-I-SOKHTA, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 0 0 0 0 0 0 0 0.01 0.01

0.10 10 0 0 0 0 0 0 0 0.01 0.02

0.20 5 0 0 0.01 0.01 0.01 0.01 0.01 0.01 0.03

0.50 2 0.01 0.01 0.02 0.02 0.02 0.03 0.04 0.04 0.08
169

1-11.L00-1A PAGHMAN RIVER AT PUL-I-SOKHTA, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 0.01 0.01 0.01 0.03 0 0.01 0.01 0.03

0.10 10 0.02 0.02 0.02 0.05 0.01 0.02 0.02 0.06

0.20 5 0.04 0.04 0.05 0.09 0.02 0.03 0.04 0.12

0.50 2 0.15 0.16 0.18 0.23 0.09 0.11 0.16 0.41

June-July-August September-October-November

0.05 20 0 0 0 0 0 0 0 0

0.10 10 0 0 0 0 0 0 0 0

0.20 5 0.01 0.01 0.01 0.01 0 0.01 0.01 0.01

0.50 2 0.02 0.02 0.02 0.04 0.02 0.02 0.03 0.03
170

1-11.L00-1A PAGHMAN RIVER AT PUL-I-SOKHTA, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1963 May 12, 1963 17.8 1975 August 13, 1975 80.0

1964 April 10, 1964 15.5 1978 August 17, 1978 70.5

1965 May 7, 1965 16.0 1968 April 30, 1968 48.8

1966 April 27, 1966 5.56 1979 March 29, 1979 39.2

1967 April 27, 1967 34.8 1967 April 27, 1967 34.8

1968 April 30, 1968 48.8 1980 April 11, 1980 23.7

1969 April 19, 1969 4.65 1972 May 6, 1972 19.5

1970 July 7, 1970 4.00 1963 May 12, 1963 17.8

1971 April 12, 1971 3.42 1973 August 2, 1973 17.1

1972 May 6, 1972 19.5 1965 May 7, 1965 16.0

1973 August 2, 1973 17.1 1964 April 10, 1964 15.5

1974 April 7, 1974 10.5 1976 April 27, 1976 13.1

1975 August 13, 1975 80.0 1974 April 7, 1974 10.5

1976 April 27, 1976 13.1 1977 April 10, 1977 7.40

1977 April 10, 1977 7.40 1966 April 27, 1966 5.56

1978 August 17, 1978 70.5 1969 April 19, 1969 4.65

1979 March 29, 1979 39.2 1970 July 7, 1970 4.00

1980 April 11, 1980 23.7 1971 April 12, 1971 3.42
171

1-11.L00-1A PAGHMAN RIVER AT PUL-I-SOKHTA, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[Data may not be rounded in accordance with U.S. Geological Survey publication standards; --, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1963 -- -- -- -- -- 0.95 1.40 3.14 0.19 0.14 0.15 0.15 --

1964 0.15 0.17 0.19 0.24 0.25 2.42 8.88 1.34 0.13 0.05 0.10 0.19 1.17

1965 0.18 0.31 0.58 0.53 0.58 0.55 6.73 6.55 1.12 0.57 0.20 0.14 1.51

1966 0.21 0.66 0.81 1.16 1.20 1.41 3.41 0.90 0.01 0.01 0.02 0.00 0.81

1967 0.07 0.47 0.67 0.61 0.61 0.72 4.68 4.66 0.35 0.47 0.32 0.16 1.15

1968 0.21 0.47 0.88 0.81 0.63 2.77 3.91 4.69 0.67 0.18 0.16 0.32 1.31

1969 0.32 0.43 0.61 0.87 0.86 1.27 2.22 0.42 0.04 0.05 0.07 0.09 0.60

1970 0.12 0.72 0.64 0.69 0.75 0.85 0.21 0.07 0.06 0.29 0.03 0.04 0.37

1971 0.07 0.04 0.14 0.26 0.41 0.58 0.67 0.06 0.02 0.02 0.02 0.02 0.19

1972 0.02 0.01 0.04 0.07 0.07 1.16 5.01 3.94 0.13 0.05 0.02 0.00 0.88

1973 0.00 0.06 0.34 0.38 0.58 2.49 8.28 0.67 0.02 0.13 0.14 0.09 1.09

1974 0.12 0.19 0.68 0.62 0.34 0.64 0.93 0.12 0.12 0.11 0.10 0.08 0.34

1975 0.05 0.05 0.23 0.28 0.23 0.98 3.34 0.27 0.11 0.04 0.34 0.05 0.49

1976 0.02 0.04 0.09 0.17 0.20 1.16 5.46 2.10 0.09 0.03 0.03 0.01 0.78

1977 0.01 0.04 0.19 0.28 0.32 0.38 1.19 0.03 0.02 0.01 0.01 0.01 0.21

1978 0.01 0.15 0.08 0.22 0.31 1.90 1.07 0.03 0.02 0.79 0.07 0.01 0.39

1979 0.01 0.01 0.04 0.20 0.32 0.87 2.08 0.35 0.09 0.08 0.01 0.01 0.34

1980 0.01 0.01 0.04 0.18 0.43 0.87 6.00 0.89 0.04 0.02 0.02 0.03 0.70
172

2-4.000-5A URGUN RIVER AT PIRKOTI

(U.S. Geological Survey identification number: 325500069150000)

LOCATION: Lat 32o55'N., long 69o15'E.

DRAINAGE AREA: 780 km2

.

ELEVATION: 2,108 meters above mean sea level.

PERIOD OF RECORD: August 13, 1970 to September 30, 1978.

GAGE: Water-stage recorder.

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
173

2-4.000-5A URGUN RIVER AT PIRKOTI, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 0.30 1977 0 1972 0.10 0.11 1.13 1.08

November 0.49 1978 0 1972 0.20 0.17 0.86 2.22

December 0.50 1977 0.01 1972 0.28 0.18 0.64 3.12

January 0.81 1977 0.01 1972 0.32 0.24 0.74 3.55

February 2.18 1973 0.24 1971 0.90 0.57 0.63 10.0

March 4.27 1976 0.25 1971 2.31 1.49 0.64 25.6

April 7.64 1976 0.06 1971 2.11 2.41 1.14 23.4

May 1.76 1972 0.04 1978 0.61 0.67 1.10 6.78

June 0.74 1972 0.03 1971 0.23 0.30 1.28 2.60

July 6.12 1978 0.10 1974 1.27 2.01 1.59 14.03

August 1.14 1977 0.01 1971 0.46 0.47 1.02 5.07

September 0.50 1970 0 1971 0.22 0.21 0.93 2.49

Annual 1.48 1976 0.11 1971 0.75 0.38 0.51 100
174

2-4.000-5A URGUN RIVER AT PIRKOTI, Continued 

Monthly and annual flow duration, in cubic meters per second 

[ng, not given] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 0 0 0.01 0.01 0.18 0.25 0.05 0.02 0.01 0.02 0 0 0.01

90 0 0 0.02 0.02 0.21 0.28 0.06 0.04 0.02 0.04 0 0 0.02

85 0.01 0.02 0.05 0.15 0.22 0.47 0.19 0.05 0.02 0.06 0.01 0.01 0.03

80 0.01 0.03 0.10 0.18 0.23 0.66 0.31 0.06 0.02 0.07 0.01 0.02 0.04

75 0.02 0.04 0.13 0.20 0.24 0.85 0.38 0.07 0.03 0.08 0.02 0.02 0.06

70 0.03 0.05 0.14 0.21 0.25 1.02 0.50 0.08 0.04 0.10 0.02 0.03 0.08

65 0.03 0.06 0.21 0.22 0.31 1.15 0.60 0.14 0.04 0.12 0.02 0.05 0.11

60 0.04 0.06 0.23 0.24 0.37 1.40 0.74 0.17 0.05 0.14 0.03 0.07 0.17

55 0.04 0.08 0.28 0.25 0.46 1.50 0.90 0.23 0.05 0.20 0.07 0.08 0.20

50 0.04 0.10 0.30 0.26 0.51 1.83 1.10 0.31 0.05 0.24 0.09 0.10 0.24

45 0.05 0.14 0.32 0.31 0.56 1.99 1.34 0.35 0.06 0.31 0.14 0.11 0.29

40 0.07 0.18 0.34 0.34 0.71 2.41 1.50 0.39 0.08 0.39 0.21 0.12 0.34

35 0.10 0.20 0.40 0.36 0.81 2.77 1.70 0.46 0.10 0.48 0.31 0.17 0.42

30 0.14 0.21 0.42 0.38 0.99 2.98 1.97 0.55 0.13 0.54 0.41 0.21 0.49

25 0.16 0.25 0.43 0.40 1.08 3.19 2.41 0.89 0.19 0.65 0.49 0.27 0.56

20 0.20 0.28 0.50 0.44 1.15 3.90 3.74 1.21 0.26 0.95 0.55 0.36 0.85

15 0.22 0.31 0.52 0.48 1.22 4.30 4.95 1.66 0.31 1.53 0.66 0.38 1.18

10 0.31 0.44 0.54 0.62 1.48 5.34 6.19 1.89 0.50 2.39 0.85 0.41 1.87

5 ng 0.51 0.56 0.00 3.31 5.74 9.00 2.15 1.13 7.95 1.51 0.75 3.73
175

2-4.000-5A URGUN RIVER AT PIRKOTI, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge1 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 6.40 0.82 0.39 0.17 0.09

0.95 1.05 11.8 1.81 1.13 0.64 0.37

0.90 1.11 15.8 2.65 1.84 1.16 0.72

0.80 1.25 21.7 4.05 3.06 2.13 1.41

0.50 2 36.2 8.20 6.58 5.05 3.65

0.20 5 53.7 14.5 11.0 8.44 6.44

0.10 10 63.1 18.7 13.2 9.88 7.68

0.04 25 73.0 23.5 15.2 11.0 8.64

0.02 50 78.9 26.9 16.2 11.5 9.07

0.01 100 84.0 29.9 17.0 11.8 9.34

0.005 200 88.2 32.7 17.6 12.0 9.50

0.002 500 92.9 ng ng ng ng

1

Less than 10 years of data used.

2-4.000-5A URGUN RIVER AT PIRKOTI, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 0 0 0 0 0 0 0 0 0

0.10 10 0 0 0 0 0 0 0 0 0.01

0.20 5 0.01 0.01 0.01 0.01 0.01 0.02 0.02 0.01 0.03

0.50 2 0.01 0.01 0.02 0.02 0.03 0.11 0.11 0.13 0.16
176

2-4.000-5A URGUN RIVER AT PIRKOTI, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 0 0 0 0.01 0.01 0.01 0.01 0.02

0.10 10 0 0 0.01 0.03 0.02 0.02 0.03 0.04

0.20 5 0.05 0.06 0.04 0.07 0.03 0.04 0.05 0.08

0.50 2 0.15 0.20 0.20 0.23 0.09 0.13 0.18 0.25

June-July-August September-October-November

0.05 20 0 0 0 0.01 0 0 0 0

0.10 10 0 0 0 0.01 0 0 0 0

0.20 5 0.01 0.01 0.01 0.02 0.01 0.01 0.01 0.01

0.50 2 0.01 0.02 0.02 0.06 0.02 0.02 0.02 0.04

2-4.000-5A URGUN RIVER AT PIRKOTI, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1970 August 22, 1970 82.0 1970 August 22, 1970 82.0

1971 August 4, 1971 26.5 1975 July 12, 1975 45.1

1972 May 4, 1972 38.0 1974 April 27, 1974 42.5

1973 August 5, 1973 32.6 1972 May 4, 1972 38.0

1974 April 27, 1974 42.5 1973 August 5, 1973 32.6

1975 July 12, 1975 45.1 1977 May 27, 1977 32.6

1976 April 23, 1976 10.0 1978 July 5, 1978 30.0

1977 May 27, 1977 32.6 1971 August 4, 1971 26.5

1978 July 5, 1978 30.0 1976 April 23, 1976 10.0
177

2-4.000-5A URGUN RIVER AT PIRKOTI, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[Data may not be rounded in accordance with U.S. Geological Survey publication standards; --, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1970 -- -- -- -- -- -- -- -- -- -- -- 0.50 --

1971 0.03 0.04 0.08 0.19 0.24 0.25 0.06 0.05 0.03 0.30 0.01 0 0.11

1972 0 0 0.01 0.01 0.92 1.11 2.73 1.76 0.74 0.30 0.11 0.09 0.64

1973 0.10 0.15 0.25 0.22 2.18 3.27 1.02 0.39 0.06 1.16 0.62 0.39 0.81

1974 0.24 0.37 0.45 0.40 0.81 3.37 1.65 0.31 0.05 0.10 0.01 0.01 0.65

1975 0.04 0.08 0.21 0.27 0.70 3.65 2.40 0.40 0.07 0.15 0.07 0.05 0.67

1976 0.07 0.18 0.30 0.42 0.80 4.27 7.64 1.59 0.21 1.14 0.68 0.45 1.48

1977 0.30 0.30 0.50 0.81 1.04 1.22 0.61 0.36 0.69 0.86 1.14 0.43 0.69

1978 0.01 0.49 0.45 0.23 0.56 1.34 0.79 0.04 0.04 6.12 1.01 0.11 0.94
178

2-4.4L0-2T DAHANE LEGAD RIVER NEAR URGUN

(U.S. Geological Survey identification number: 325800069090000)

LOCATION: Lat 32o58'N., long 69o09'E.

DRAINAGE AREA: 185 km2

.

ELEVATION: 2,215 meters above mean sea level.

PERIOD OF RECORD: April 9, 1972 to September 30, 1978.

GAGE: Water-stage recorder.

0

0.1

0.2

0.3

0.4

0.5

0.6

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
179

2-4.4L0-2T DAHANE LEGAD RIVER NEAR URGUN, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 0.12 1977 0.01 1974 0.03 0.04 1.52 0.66

November 0.16 1978 0.01 1975 0.06 0.06 0.93 1.43

December 0.17 1978 0.03 1973 0.08 0.06 0.73 1.89

January 0.20 1977 0.03 1976 0.09 0.06 0.70 1.95

February 1.25 1973 0.12 1976 0.45 0.41 0.90 10.3

March 1.68 1973 0.60 1977 1.33 0.51 0.39 30.4

April 2.88 1976 0.34 1978 1.09 0.95 0.88 24.8

May 0.77 1972 0.03 1978 0.34 0.27 0.81 7.65

June 0.42 1977 0.01 1974 0.13 0.15 1.15 3.02

July 2.36 1978 0.01 1974 0.53 0.83 1.55 12.2

August 0.46 1977 0.01 1974 0.18 0.18 1.05 4.01

September 0.23 1977 0.01 1974 0.07 0.09 1.23 1.67

Annual 0.53 1976 0.31 1975 0.37 0.09 0.24 100
180

2-4.4L0-2T DAHANE LEGAD RIVER NEAR URGUN, Continued 

Monthly and annual flow duration, in cubic meters per second 

[ng, not given] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 0.01 0 0.01 0.01 0.03 0.35 0.12 0.02 0.01 0.01 0.01 0.01 0.01

90 0.01 0.01 0.02 0.01 0.05 0.46 0.17 0.02 0.01 0.02 0.01 0.01 0.01

85 0.01 0.01 0.02 0.02 0.05 0.51 0.27 0.04 0.01 0.02 0.01 0.01 0.02

80 0.01 0.01 0.02 0.02 0.06 0.56 0.32 0.05 0.01 0.02 0.01 0.01 0.02

75 0.01 0.01 0.03 0.02 0.08 0.68 0.39 0.07 0.02 0.03 0.02 0.01 0.02

70 0.01 0.02 0.04 0.03 0.11 0.77 0.43 0.09 0.02 0.03 0.02 0.02 0.02

65 0.01 0.02 0.05 0.04 0.15 0.83 0.51 0.13 0.02 0.05 0.02 0.02 0.03

60 0.02 0.02 0.06 0.04 0.18 0.95 0.54 0.15 0.02 0.06 0.02 0.02 0.05

55 0.02 0.02 0.06 0.05 0.20 1.00 0.58 0.17 0.03 0.08 0.03 0.02 0.06

50 0.02 0.02 0.07 0.06 0.22 1.06 0.66 0.21 0.05 0.09 0.03 0.02 0.08

45 0.02 0.03 0.07 0.06 0.23 1.17 0.73 0.25 0.06 0.10 0.05 0.02 0.11

40 0.02 0.03 0.09 0.07 0.27 1.26 0.82 0.30 0.07 0.11 0.06 0.02 0.15

35 0.02 0.05 0.10 0.10 0.30 1.41 0.92 0.34 0.09 0.13 0.08 0.03 0.17

30 0.02 0.06 0.14 0.13 0.39 1.57 1.11 0.40 0.11 0.16 0.10 0.04 0.19

25 0.02 0.07 0.14 0.15 0.47 1.86 1.57 0.48 0.12 0.20 0.11 0.05 0.27

20 0.03 0.09 0.15 0.16 0.56 1.96 1.84 0.63 0.16 0.29 0.15 0.05 0.43

15 0.08 0.10 0.15 0.20 0.66 2.26 2.38 0.78 0.22 0.53 0.17 0.16 0.64

10 ng 0.13 0.16 0.21 0.84 2.45 3.01 0.90 0.26 1.12 0.21 0.17 1.04

5 ng 0.16 0.20 0.28 1.85 2.99 3.36 1.04 0.41 3.98 0.48 0.18 1.93
181

2-4.4L0-2T DAHANE LEGAD RIVER NEAR URGUN, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge1 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 10.6 22.01 2.18 0.97 0.45

0.95 1.05 14.2 2.51 2.36 1.38 0.82

0.90 1.11 16.5 2.85 2.50 1.64 1.06

0.80 1.25 19.9 3.34 2.72 1.99 1.40

0.50 2 28.3 4.62 3.40 2.76 2.10

0.20 5 40.0 6.59 4.65 3.64 2.72

0.10 10 48.0 8.04 5.69 4.13 2.97

0.04 25 58.2 10.0 7.28 4.65 3.16

0.02 50 65.8 11.6 8.69 4.99 3.25

0.01 100 73.5 13.3 10.3 5.29 3.31

0.005 200 81.3 15.1 12.2 5.55 3.35

0.002 500 91.9 ng ng ng ng

1

Less than 10 years of data used.

2

Data does not fit log-Pearson Type III curve, use with caution.

2-4.4L0-2T DAHANE LEGAD RIVER NEAR URGUN, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 0 0 0 0 0.01 0.01 0.01 0.01 0.01

0.10 10 0 0 0 0 0.01 0.01 0.01 0.01 0.01

0.20 5 0 0 0 0.01 0.01 0.01 0.01 0.02 0.02

0.50 2 0.01 0.01 0.01 0.01 0.01 0.01 0.03 0.04 0.05
182

2-4.4L0-2T DAHANE LEGAD RIVER NEAR URGUN, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 0.01 0.01 0.01 0.02 0.01 0.01 0.01 0.02

0.10 10 0.01 0.01 0.01 0.02 0.01 0.01 0.02 0.03

0.20 5 0.01 0.01 0.01 0.02 0.01 0.02 0.03 0.05

0.50 2 0.01 0.01 0.02 0.03 0.02 0.07 0.10 0.15

June-July-August September-October-November

0.05 20 0.01 0.01 0.01 0.01 0 0 0 0.01

0.10 10 0.01 0.01 0.01 0.01 0 0 0.01 0.01

0.20 5 0.01 0.01 0.01 0.01 0.01 0 0.01 0.01

0.50 2 0.01 0.01 0.01 0.02 0.01 0.01 0.01 0.01

2-4.4L0-2T DAHANE LEGAD RIVER NEAR URGUN, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1973 September 19, 1973 49.0 1973 September 19, 1973 49.0

1974 April 27, 1974 19.8 1976 July 14, 1976 37.0

1975 August 12, 1975 35.0 1975 August 12, 1975 35.0

1976 July 14, 1976 37.0 1977 May 25, 1977 24.4

1977 May 25, 1977 24.4 1974 April 27, 1974 19.8

1978 July 5, 1978 16.4 1978 July 5, 1978 16.4
183

2-4.4L0-2T DAHANE LEGAD RIVER NEAR URGUN, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[--, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1972 -- -- -- -- -- -- -- 0.77 0.23 0.08 0.03 0.02 --

1973 0.01 0.05 0.03 0.10 1.25 1.68 0.49 0.15 0.02 0.29 0.11 0.04 0.35

1974 0.01 0.03 0.05 0.06 0.48 1.63 1.24 0.20 0.01 0.01 0.01 0.01 0.31

1975 0.01 0.01 0.03 0.05 0.27 1.68 1.11 0.33 0.08 0.07 0.04 0.01 0.31

1976 0.01 0.03 0.06 0.03 0.12 1.68 2.88 0.65 0.16 0.44 0.18 0.17 0.53

1977 0.12 0.11 0.15 0.20 0.24 0.60 0.45 0.22 0.42 0.49 0.46 0.23 0.31

1978 0.01 0.16 0.17 0.07 0.36 0.75 0.34 0.03 0.01 2.36 0.40 0.04 0.39
184

8-0.000-1M HARI RUD RIVER AT TIR PUL

(U.S. Geological Survey identification number: 343600061160000)

LOCATION: Lat 34o36'N., long 61o16'E.

DRAINAGE AREA: 31,760 km2

.

ELEVATION: 760 meters above mean sea level.

PERIOD OF RECORD: March 11, 1969 to September 30, 1978.

GAGE: Water-stage recorder.

0

10

20

30

40

50

60

70

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
185

8-0.000-1M HARI RUD RIVER AT TIR PUL, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 0.54 1970 0.04 1974 0.16 0.15 0.94 0.05

November 9.76 1977 0.04 1974 2.74 3.95 1.44 0.79

December 12.8 1977 0.22 1974 4.66 5.06 1.09 1.34

January 20.2 1978 0.80 1971 12.8 6.42 0.50 3.67

February 35.5 1976 1.30 1971 22.4 10.1 0.45 6.44

March 94.0 1972 3.39 1971 47.2 24.2 0.51 13.6

April 374 1969 16.9 1971 125 112 0.89 35.8

May 302 1969 1.03 1970 108 114 1.05 31.2

June 95.3 1969 0.06 1970 23.9 32.7 1.37 6.87

July 5.64 1969 0.03 1974 0.88 1.79 2.04 0.25

August 0.44 1969 0.01 1973 0.09 0.13 1.36 0.03

September 0.23 1969 0.01 1970 0.08 0.07 0.85 0.02

Annual 57.4 1976 2.83 1971 24.1 17.3 0.72 100
186

8-0.000-1M HARI RUD RIVER AT TIR PUL, Continued 

Monthly and annual flow duration, in cubic meters per second 

[ng, not given] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 0.02 0.03 0.10 0.81 1.25 1.98 7.83 0.27 0.05 0.02 0 0 0.02

90 0.04 0.06 0.17 0.94 1.71 11.7 19.4 0.61 0.06 0.03 0.01 0 0.04

85 0.05 0.09 0.25 1.92 13.5 25.6 30.9 2.72 0.09 0.03 0.02 0.01 0.05

80 0.07 0.11 0.38 2.86 15.7 29.1 36.3 5.71 0.12 0.04 0.02 0.02 0.08

75 0.07 0.13 0.45 4.98 16.9 32.3 40.2 10.0 0.24 0.04 0.03 0.03 0.10

70 0.08 0.14 0.50 6.06 18.1 33.9 44.7 16.7 0.37 0.05 0.03 0.03 0.11

65 0.08 0.16 0.54 6.97 19.2 35.6 50.8 23.4 0.51 0.07 0.03 0.04 0.17

60 0.09 0.18 0.71 7.96 19.9 37.2 60.3 30.6 0.69 0.08 0.04 0.04 0.28

55 0.09 0.20 1.42 10.1 20.6 38.9 72.8 37.0 1.27 0.09 0.04 0.06 0.51

50 0.10 0.28 1.89 12.6 21.3 40.6 84.2 66.2 3.22 0.11 0.05 0.08 1.24

45 0.10 0.31 2.21 14.1 22.1 42.7 93.6 89.3 5.93 0.12 0.07 0.08 3.32

40 0.11 0.33 3.15 15.5 23.8 44.7 105 117 9.21 0.14 0.08 0.09 8.34

35 0.11 0.41 3.99 16.9 25.5 46.8 117 134 14.4 0.17 0.08 0.09 13.5

30 0.12 0.97 5.36 18.2 27.3 48.9 130 156 21.8 0.21 0.09 0.10 18.9

25 0.14 1.87 7.59 19.4 30.0 52.7 149 178 34.0 0.26 0.10 0.10 24.4

20 0.15 3.78 9.30 20.6 32.9 59.4 174 207 47.2 0.41 0.11 0.11 34.1

15 0.19 9.40 10.7 22.0 35.2 68.6 206 239 61.1 0.69 0.14 0.14 43.4

10 0.24 12.1 12.3 23.5 38.5 83.5 282 283 83.3 1.33 0.35 0.20 66.9

5 0.29 14.0 16.0 27.2 43.8 116 486 346 107 5.89 ng 0.22 125
187

8-0.000-1M HARI RUD RIVER AT TIR PUL, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 21.4 20.2 19.3 13.4 8.58

0.95 1.05 40.6 35.1 31.9 25.1 18.4

0.90 1.11 57.3 47.5 42.3 34.8 27.0

0.80 1.25 87.4 68.7 60.2 51.6 42.3

0.50 2 199 141 122 108 95.0

0.20 5 458 296 259 223 199

0.10 10 714 438 391 325 286

0.04 25 1,150 671 615 481 412

0.02 50 1,570 886 831 619 517

0.01 100 2,080 1,140 1,100 775 629

0.005 200 2,700 1,440 1,420 950 748

0.002 500 3,710 ng ng ng ng

8-0.000-1M HARI RUD RIVER AT TIR PUL, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 0 0 0 0 0 0.01 0.02 0.02 0.03

0.10 10 0 0 0 0 0 0.01 0.02 0.03 0.05

0.20 5 0 0 0 0 0.01 0.02 0.03 0.03 0.10

0.50 2 0.02 0.02 0.02 0.02 0.03 0.04 0.05 0.07 0.41
188

8-0.000-1M HARI RUD RIVER AT TIR PUL, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 0.04 0.04 0.05 0.19 0.05 0.09 0.18 0.93

0.10 10 0.06 0.08 0.10 0.34 0.16 0.26 0.52 2.33

0.20 5 0.12 0.16 0.20 0.67 0.57 0.90 1.74 6.16

0.50 2 0.45 0.71 0.85 2.32 4.59 6.95 11.7 26.5

June-July-August September-October-November

0.05 20 0 0 0 0 0 0 0 0.01

0.10 10 0 0 0 0 0 0 0 0.01

0.20 5 0 0.01 0.01 0.02 0 0 0 0.02

0.50 2 0.02 0.03 0.03 0.04 0.02 0.02 0.03 0.05

8-0.000-1M HARI RUD RIVER AT TIR PUL, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1969 April 15, 1969 776 1969 April 15, 1969 776

1970 April 1, 1970 118 1976 April 24, 1976 734

1971 April 16, 1971 60.0 1975 April 27, 1975 480

1972 April 27, 1972 353 1972 April 27, 1972 353

1973 May 6, 1973 177 1973 May 6, 1973 177

1974 April 4, 1974 140 1974 April 4, 1974 140

1975 April 27, 1975 480 1978 April 19, 1978 132

1976 April 24, 1976 734 1970 April 1, 1970 118

1977 April 10, 1977 47.6 1971 April 16, 1971 60.0

1978 April 19, 1978 132 1977 April 10, 1977 47.6
189

8-0.000-1M HARI RUD RIVER AT TIR PUL, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[--, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1969 -- -- -- -- -- -- 374 302 95.3 5.64 0.44 0.23 --

1970 0.54 8.96 2.18 19.2 34.2 47.7 40.7 1.03 0.06 0.04 0.02 0.01 12.7

1971 0.18 0.31 0.46 0.80 1.30 3.39 16.9 7.51 2.91 0.20 0.05 0.07 2.83

1972 0.09 1.34 1.26 7.74 21.5 94.0 149 120 20.2 0.12 0.09 0.09 34.6

1973 0.11 0.18 1.70 14.3 19.6 54.3 81.2 96.1 3.38 0.06 0.01 0.01 22.6

1974 0.04 0.04 0.22 11.2 27.4 45.0 78.4 12.8 0.08 0.03 0.03 0.07 14.4

1975 0.08 0.09 2.68 8.41 18.3 51.0 183 194 48.8 0.22 0.02 0.02 42.3

1976 0.08 0.19 8.55 14.2 35.5 60.2 229 281 58.3 2.17 0.09 0.08 57.4

1977 0.13 9.76 12.8 19.0 23.1 30.4 38.8 22.5 7.51 0.19 0.11 0.11 13.6

1978 0.21 3.84 12.1 20.2 20.8 38.9 55.2 47.6 2.47 0.13 0.06 0.09 16.8
190

8-0.000-2M HARI RUD RIVER AT PUL-I-HASHIMI

(U.S. Geological Survey identification number: 342000061560000)

LOCATION: Lat 34o20'N., long 61o56'E.

DRAINAGE AREA: 27,260 km2

.

ELEVATION: 850 meters above mean sea level.

PERIOD OF RECORD: December 14, 1972 to September 30, 1978.

GAGE: Water-stage recorder. Staff gage at same site and datum prior to 1977 water year.

0

10

20

30

40

50

60

70

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
191

8-0.000-2M HARI RUD RIVER AT PUL-I-HASHIMI, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 2.28 1978 1.05 1975 1.68 0.46 0.27 0.44

November 12.2 1977 1.38 1975 4.96 4.58 0.92 1.30

December 13.8 1978 3.71 1974 9.40 4.59 0.49 2.46

January 20.4 1978 6.20 1975 13.0 5.28 0.41 3.40

February 28.6 1976 9.16 1975 20.3 6.69 0.33 5.30

March 68.3 1973 27.1 1977 48.3 14.5 0.30 12.6

April 247 1976 57.0 1977 130 77.5 0.59 34.2

May 315 1976 21.5 1974 127 115 0.91 33.4

June 72.5 1976 0.74 1974 23.0 29.8 1.29 6.03

July 3.01 1976 0.67 1974 1.52 0.85 0.56 0.40

August 1.50 1977 0.71 1974 1.00 0.28 0.28 0.26

September 1.28 1978 0.86 1974 1.11 0.17 0.15 0.29

Annual 62.8 1976 15.4 1974 32.4 20.7 0.64 100
192

8-0.000-2M HARI RUD RIVER AT PUL-I-HASHIMI, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 0.86 1.27 2.37 4.17 7.99 21.8 31.9 5.35 0.71 0.68 0.67 0.79 0.75

90 1.14 1.33 3.00 4.98 9.10 24.8 46.6 16.2 0.75 0.69 0.75 0.81 0.88

85 1.18 1.39 3.44 5.25 12.0 28.3 51.2 21.9 0.89 0.71 0.76 0.85 1.05

80 1.32 1.49 3.88 5.64 13.0 30.4 57.4 24.9 1.00 0.86 0.78 0.87 1.20

75 1.41 1.57 4.38 6.22 13.7 31.6 62.5 30.3 1.12 0.90 0.79 0.95 1.41

70 1.42 1.66 6.34 6.49 15.5 33.6 68.0 37.9 1.53 0.92 0.80 1.00 1.63

65 1.44 2.10 7.57 7.54 16.6 35.6 77.9 44.7 1.91 0.95 0.81 1.08 1.89

60 1.46 2.18 8.61 11.1 17.2 37.5 83.5 52.0 2.13 1.00 0.87 1.11 2.28

55 1.56 2.25 9.39 11.7 17.7 39.3 89.1 61.5 2.43 1.12 0.93 1.12 3.60

50 1.62 2.48 9.77 12.3 18.2 41.3 100 87.9 3.56 1.15 0.95 1.13 6.97

45 1.65 2.62 10.1 14.1 19.0 43.4 107 112 6.25 1.18 0.99 1.15 10.6

40 1.71 2.75 10.4 15.3 20.0 46.5 118 135 9.47 1.46 1.01 1.19 13.6

35 1.77 2.87 11.0 15.8 20.9 50.8 128 152 13.3 1.73 1.08 1.20 17.1

30 1.86 3.22 11.6 16.3 21.7 56.3 136 175 18.4 1.79 1.09 1.21 20.9

25 1.99 9.09 12.0 17.1 22.7 59.0 144 203 24.8 1.85 1.10 1.23 27.9

20 2.05 11.5 12.6 18.9 25.8 63.2 161 235 33.2 1.90 1.12 1.26 37.5

15 2.16 12.0 13.4 20.4 29.1 66.7 182 271 55.4 1.94 1.19 1.32 54.5

10 2.23 12.8 14.0 21.1 31.0 78.3 233 319 87.2 1.99 1.56 1.47 85.1

5 2.80 15.5 22.6 21.8 41.2 94.3 396 358 119 3.87 1.60 1.50 159
193

8-0.000-2M HARI RUD RIVER AT PUL-I-HASHIMI, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge1 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 35.9 228.1 29.4 28.9 27.7

0.95 1.05 56.1 47.4 46.5 45.4 42.8

0.90 1.11 72.4 63.4 60.5 58.4 54.7

0.80 1.25 100 91.4 84.6 80.2 74.4

0.50 2 197 191 170 152 139

0.20 5 413 420 366 303 274

0.10 10 628 648 564 442 398

0.04 25 1,000 1,050 915 672 602

0.02 50 1,370 1,440 1,270 887 793

0.01 100 1,840 1,920 1,710 1,150 1,020

0.005 200 2,410 2,520 2,280 1,460 1,300

0.002 500 3,390 ng ng ng ng

1

Less than 10 years of data used.

2

Data does not fit log-Pearson Type III curve, use with caution.

8-0.000-2M HARI RUD RIVER AT PUL-I-HASHIMI, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 0.61 0.60 0.60 0.60 0.61 0.61 0.63 0.66 0.67

0.10 10 0.67 0.67 0.67 0.67 0.68 0.68 0.73 0.79 0.90

0.20 5 0.75 0.75 0.76 0.77 0.77 0.79 0.86 0.96 1.26

0.50 2 0.92 0.93 0.95 0.95 0.96 1.00 1.12 1.29 2.33
194

8-0.000-2M HARI RUD RIVER AT PUL-I-HASHIMI, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 1.23 1.35 1.67 2.85 0.98 1.30 4.54 18.0

0.10 10 1.77 1.98 2.36 3.79 2.40 3.16 7.87 21.5

0.20 5 2.66 3.04 3.49 5.22 5.81 7.57 13.8 26.6

0.50 2 5.40 6.30 6.78 8.86 18.0 23.2 29.3 39.2

June-July-August September-October-November

0.05 20 0.62 0.62 0.62 0.63 0.60 0.68 0.70 0.80

0.10 10 0.67 0.68 0.67 0.68 0.67 0.74 0.76 0.86

0.20 5 0.73 0.75 0.75 0.75 0.77 0.82 0.84 0.94

0.50 2 0.88 0.91 0.92 0.93 0.95 0.98 0.99 1.09

8-0.000-2M HARI RUD RIVER AT PUL-I-HASHIMI, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1973 May 1, 1973 190 1976 April 23, 1976 680

1974 April 4, 1974 111 1975 April 26, 1975 448

1975 April 26, 1975 448 1973 May 1, 1973 190

1976 April 23, 1976 680 1978 April 19, 1978 169

1977 April 15, 1977 71.3 1974 April 4, 1974 111

1978 April 19, 1978 169 1977 April 15, 1977 71.3
195

8-0.000-2M HARI RUD RIVER AT PUL-I-HASHIMI, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[--, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1973 -- -- -- 15.2 19.4 68.3 119 101 7.80 1.08 1.03 1.13 --

1974 1.46 1.86 3.71 8.19 21.4 46.5 78.4 21.5 0.74 0.67 0.71 0.86 15.4

1975 1.05 1.38 5.50 6.20 9.16 38.8 204 216 47.5 1.64 0.80 0.97 44.5

1976 1.84 2.56 10.6 11.9 28.6 58.0 247 315 72.5 3.01 1.09 1.27 62.8

1977 1.76 12.2 13.4 16.0 17.9 27.1 57.0 30.3 6.09 1.84 1.50 1.18 15.5

1978 2.28 6.80 13.8 20.4 25.1 50.9 77.5 80.7 3.53 0.92 0.88 1.28 23.7
196

8-0.000-3S HARI RUD RIVER AT PUL-I-PASHTOON

(U.S. Geological Survey identification number: 341700062130000)

LOCATION: Lat 34o17'N., long 62o13'E.

DRAINAGE AREA: 26,130 km2

.

ELEVATION: 940 meters above mean sea level.

PERIOD OF RECORD: April 1, 1963 to January 31, 1977.

GAGE: Water-stage recorder. Staff gage at same site and datum prior to 1969 water year.

0

10

20

30

40

50

60

70

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
197

8-0.000-3S HARI RUD RIVER AT PUL-I-PASHTOON, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 1.03 1967 0.35 1975 0.57 0.20 0.35 0.14

November 9.59 1977 0.35 1975 1.83 2.68 1.47 0.45

December 8.65 1977 0.05 1965 2.29 3.15 1.37 0.56

January 12.3 1964 0.89 1967 5.69 3.62 0.64 1.40

February 29.6 1964 1.37 1975 12.9 9.03 0.70 3.16

March 128 1972 10.5 1967 50.7 34.2 0.67 12.5

April 266 1975 30.0 1963 133 82.4 0.62 32.6

May 398 1975 13.9 1974 168 112 0.67 41.3

June 79.5 1975 0.21 1974 31.6 30.3 0.96 7.75

July 1.40 1976 0.02 1968 0.42 0.40 0.95 0.10

August 0.52 1967 0.04 1968 0.28 0.17 0.62 0.07

September 0.78 1964 0.08 1968 0.34 0.18 0.53 0.08

Annual 66.0 1975 6.35 1966 35.0 18.7 0.53 100
198

8-0.000-3S HARI RUD RIVER AT PUL-I-PASHTOON, Continued 

Monthly and annual flow duration, in cubic meters per second 

[ng, not given] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 0.24 0.24 0.04 0.41 1.13 3.48 4.84 1.53 0.23 0.03 0.03 0.07 0.06

90 0.32 0.33 0.06 0.67 1.40 5.42 13.3 12.1 0.27 0.03 0.04 0.10 0.18

85 0.33 0.36 0.08 0.80 1.90 6.33 30.4 32.8 0.38 0.04 0.06 0.14 0.28

80 0.38 0.39 0.30 0.89 3.61 9.34 44.4 49.2 0.52 0.08 0.10 0.22 0.35

75 0.40 0.43 0.36 0.99 4.62 12.0 58.8 67.0 0.73 0.14 0.12 0.23 0.41

70 0.42 0.48 0.42 1.16 6.55 15.6 68.7 86.2 0.89 0.16 0.17 0.28 0.47

65 0.43 0.53 0.47 1.39 8.04 21.9 76.0 112 1.00 0.18 0.19 0.30 0.52

60 0.45 0.60 0.52 1.91 8.87 25.5 83.5 131 1.20 0.20 0.22 0.30 0.63

55 0.47 0.67 0.56 2.52 9.62 28.7 94.4 147 2.15 0.24 0.25 0.31 0.83

50 0.49 0.73 0.71 3.08 10.3 32.8 105 159 5.59 0.28 0.28 0.32 1.02

45 0.50 0.79 0.91 3.82 11.0 37.9 119 171 9.77 0.32 0.31 0.33 1.46

40 0.52 0.89 0.98 5.12 12.1 45.7 133 182 14.6 0.36 0.33 0.34 3.47

35 0.53 1.00 1.06 6.49 14.1 51.7 145 196 21.0 0.42 0.40 0.39 6.92

30 0.56 1.12 2.09 7.56 18.5 61.5 158 216 31.3 0.49 0.42 0.41 10.7

25 0.62 1.30 2.69 8.74 20.4 68.6 170 235 46.6 0.57 0.44 0.42 21.0

20 0.69 1.89 3.86 9.91 21.5 75.9 191 270 62.7 0.65 0.46 0.44 40.5

15 0.76 3.45 7.30 11.1 22.5 85.8 218 310 84.4 0.74 0.49 0.47 77.5

10 0.98 6.21 8.23 12.2 27.4 111 269 344 103 0.85 0.53 0.52 131

5 1.31 8.68 9.33 17.8 33.6 184 397 378 139 1.06 0.58 ng 209
199

8-0.000-3S HARI RUD RIVER AT PUL-I-PASHTOON, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 84.3 66.5 49.9 31.2 23.7

0.95 1.05 132 110 88.6 64.5 51.3

0.90 1.11 165 141 117 90.6 73.6

0.80 1.25 215 187 160 131 109

0.50 2 341 308 272 234 202

0.20 5 518 476 423 360 319

0.10 10 632 584 514 427 384

0.04 25 772 714 619 495 449

0.02 50 873 805 690 534 488

0.01 100 970 892 754 567 520

0.005 200 1,060 975 813 593 546

0.002 500 1,190 ng ng ng ng

8-0.000-3S HARI RUD RIVER AT PUL-I-PASHTOON, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 0.01 0.01 0.01 0.01 0.02 0.04 0.10 0.15 0.30

0.10 10 0.01 0.01 0.01 0.02 0.03 0.07 0.13 0.19 0.31

0.20 5 0.02 0.02 0.02 0.03 0.05 0.11 0.17 0.23 0.35

0.50 2 0.06 0.06 0.07 0.09 0.13 0.22 0.26 0.32 0.47
200

8-0.000-3S HARI RUD RIVER AT PUL-I-PASHTOON, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 0.01 0.01 0.01 0.03 0.28 0.38 0.92 6.90

0.10 10 0.02 0.03 0.03 0.06 0.59 0.84 1.68 10.2

0.20 5 0.05 0.07 0.09 0.15 1.34 2.06 3.38 16.0

0.50 2 0.33 0.44 0.51 0.70 5.53 8.66 11.8 35.3

June-July-August September-October-November

0.05 20 0 0.01 0.02 0.02 0.01 0.08 0.10 0.14

0.10 10 0 0.02 0.03 0.04 0.03 0.10 0.14 0.17

0.20 5 0.03 0.04 0.05 0.07 0.06 0.14 0.18 0.22

0.50 2 0.13 0.14 0.15 0.20 0.19 0.24 0.29 0.33

8-0.000-3S HARI RUD RIVER AT PUL-I-PASHTOON, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1963 May 8, 1963 320 1975 May 17, 1975 652

1964 April 26, 1964 275 1976 April 23, 1976 650

1965 May 7, 1965 259 1967 April 27, 1967 560

1966 April 27, 1966 135 1972 May 8, 1972 410

1967 April 27, 1967 560 1968 May 1, 1968 340

1968 May 1, 1968 340 1973 April 25, 1973 333

1972 May 8, 1972 410 1963 May 8, 1963 320

1973 April 25, 1973 333 1964 April 26, 1964 275

1974 April 4, 1974 150 1965 May 7, 1965 259

1975 May 17, 1975 652 1974 April 4, 1974 150

1976 April 23, 1976 650 1966 April 27, 1966 135
201

8-0.000-3S HARI RUD RIVER AT PUL-I-PASHTOON, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[--, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1963 -- -- -- -- -- -- 30.0 130 33.1 0.19 0.30 0.23 --

1964 0.43 2.24 0.07 12.3 29.6 64.8 167 118 7.11 0.65 0.51 0.78 33.5

1965 0.44 0.46 0.05 6.59 14.6 48.1 81.1 182 37.9 0.28 0.30 0.29 31.2

1966 0.46 0.66 1.00 3.29 5.68 12.0 36.7 15.3 0.76 0.35 0.14 0.31 6.35

1967 1.03 0.96 0.45 0.89 1.85 10.5 143 180 21.2 0.75 0.52 0.42 30.2

1968 0.43 0.53 0.93 4.16 8.30 35.2 49.9 145 66.7 0.02 0.04 0.08 26.0

1972 0.56 2.62 2.05 5.63 22.4 128 200 181 14.9 0.04 0.04 0.19 46.5

1973 0.56 1.33 2.88 6.68 14.3 79.3 165 173 8.13 0.23 0.24 0.40 37.8

1974 0.69 0.44 0.52 3.54 12.1 43.1 81.0 13.9 0.21 0.20 0.17 0.26 12.9

1975 0.35 0.35 0.43 0.94 1.37 39.7 266 398 79.5 0.50 0.35 0.35 66.0

1976 0.80 0.95 8.19 8.58 18.5 46.6 239 311 77.5 1.40 0.47 0.45 59.5

1977 0.53 9.59 8.65 10.0 -- -- -- -- -- -- -- -- --
202

8-0.000-4M HARI RUD RIVER AT ROBAT-I-AKHOND

(U.S. Geological Survey identification number: 341600062560000)

LOCATION: Lat 34o16'N., long 62o56'E.

DRAINAGE AREA: 21,630 km2.

ELEVATION: 1,170 meters above mean sea level.

PERIOD OF RECORD: April 18, 1966 to September 30, 1978.

GAGE: Water-stage recorder. Staff gage at same site and datum prior to 1969 water year.

0

20

40

60

80

100

120

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
203

8-0.000-4M HARI RUD RIVER AT ROBAT-I-AKHOND, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 14.2 1970 3.23 1972 6.50 3.79 0.58 1.17

November 28.5 1970 3.97 1972 10.1 7.52 0.75 1.82

December 25.5 1969 3.84 1972 12.2 7.05 0.58 2.19

January 21.9 1969 5.54 1967 12.6 5.89 0.47 2.27

February 25.2 1969 8.63 1967 15.9 4.98 0.31 2.86

March 219 1969 20.0 1967 57.0 52.1 0.91 10.3

April 419 1969 94.4 1970 183 92.9 0.51 32.9

May 377 1969 48.4 1970 182 118 0.65 32.8

June 139 1969 8.22 1970 54.9 43.5 0.79 9.88

July 27.4 1969 1.41 1970 10.9 7.57 0.69 1.96

August 11.6 1969 1.63 1970 5.27 2.42 0.46 0.95

September 11.3 1969 3.04 1971 5.11 2.42 0.47 0.92

Annual 108 1969 19.7 1971 47.5 25.1 0.53 100
204

8-0.000-4M HARI RUD RIVER AT ROBAT-I-AKHOND, Continued 

Monthly and annual flow duration, in cubic meters per second 

[ng, not given] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 3.17 3.93 4.10 5.24 8.70 14.5 61.9 36.6 5.28 1.58 2.09 2.56 3.48

90 3.41 4.27 5.04 6.03 9.62 16.9 69.1 47.6 7.22 3.27 2.81 2.93 4.09

85 3.77 4.47 5.41 6.27 10.3 18.6 82.0 57.9 9.16 4.20 3.17 3.20 4.55

80 3.90 4.66 5.77 6.83 10.6 20.3 92.2 67.2 10.0 4.60 3.45 3.51 5.11

75 4.00 4.85 6.07 7.57 11.2 22.0 102 77.1 11.7 4.88 3.68 3.70 5.68

70 4.11 5.03 6.35 8.19 11.6 24.7 109 89.3 14.7 5.20 3.89 3.80 6.61

65 4.28 5.30 6.62 8.85 12.2 26.6 115 101 18.1 5.55 4.12 3.88 7.72

60 4.43 5.71 7.15 9.29 13.1 29.0 122 117 20.6 6.58 4.31 3.96 9.09

55 4.59 6.32 10.4 9.68 14.1 33.3 130 132 26.0 7.50 4.45 4.12 10.8

50 4.81 7.46 11.5 10.9 15.0 36.7 136 154 33.9 8.08 4.61 4.31 12.4

45 5.13 8.15 11.9 12.4 16.3 41.5 145 174 40.6 8.71 4.93 4.57 14.8

40 5.71 8.55 12.2 13.6 17.1 47.5 165 199 49.7 9.47 5.32 4.79 17.5

35 6.31 10.3 14.0 14.9 17.5 51.6 187 221 59.8 10.9 5.62 4.94 20.1

30 6.73 11.3 17.3 16.6 17.9 55.9 208 241 70.1 12.4 6.15 5.16 24.9

25 7.25 12.0 18.0 17.4 18.7 61.6 239 264 80.1 13.7 6.52 5.49 37.7

20 8.99 13.0 18.6 18.4 19.9 68.6 269 294 98.9 16.0 6.81 6.45 62.3

15 11.9 18.1 19.1 19.4 21.4 80.5 305 312 116 20.1 7.44 7.29 99.4

10 13.8 21.5 21.1 19.9 24.0 118 355 349 143 24.3 8.21 9.37 145

5 14.8 26.7 22.7 20.7 27.1 205 456 418 174 30.6 10.8 ng 245
205

8-0.000-4M HARI RUD RIVER AT ROBAT-I-AKHOND, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 74.1 67.6 67.1 65.7 57.2

0.95 1.05 107 102 98.6 93.8 83.9

0.90 1.11 131 127 121 114 103

0.80 1.25 167 165 156 143 131

0.50 2 275 274 254 225 206

0.20 5 461 454 415 354 323

0.10 10 611 591 538 450 406

0.04 25 830 783 711 582 518

0.02 50 1,020 938 852 687 605

0.01 100 1,220 1,100 1,000 799 695

0.005 200 1,450 1,280 1,170 918 789

0.002 500 1,790 ng ng ng ng

8-0.000-4M HARI RUD RIVER AT ROBAT-I-AKHOND, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 0.97 0.97 1.09 1.33 1.63 1.83 2.26 2.56 3.25

0.10 10 1.40 1.40 1.54 1.80 2.09 2.30 2.69 2.98 3.87

0.20 5 2.09 2.10 2.24 2.52 2.76 2.99 3.33 3.62 4.79

0.50 2 3.90 3.92 4.04 4.30 4.42 4.71 5.03 5.47 7.32
206

8-0.000-4M HARI RUD RIVER AT ROBAT-I-AKHOND, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 2.80 3.00 3.22 3.75 10.3 11.4 13.2 23.3

0.10 10 3.61 3.90 4.14 4.69 11.8 12.8 14.4 24.8

0.20 5 4.84 5.27 5.55 6.11 13.9 15.0 16.5 27.7

0.50 2 8.22 9.00 9.34 9.90 18.9 21.4 23.8 38.8

June-July-August September-October-November

0.05 20 1.09 1.25 1.49 1.82 1.95 2.28 2.56 2.70

0.10 10 1.57 1.76 2.05 2.38 2.21 2.55 2.79 2.93

0.20 5 2.30 2.54 2.86 3.19 2.60 2.95 3.16 3.29

0.50 2 4.10 4.37 4.71 5.08 3.72 4.08 4.22 4.40

8-0.000-4M HARI RUD RIVER AT ROBAT-I-AKHOND, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1966 April 26, 1966 167 1969 April 16, 1969 740

1967 April 26, 1967 355 1975 May 17, 1975 592

1968 May 1, 1968 425 1976 April 24, 1976 570

1969 April 16, 1969 740 1968 May 1, 1968 425

1970 April 12, 1970 122 1967 April 26, 1967 355

1971 April 13, 1971 174 1973 May 1, 1973 305

1972 May 7, 1972 261 1978 April 18, 1978 292

1973 May 1, 1973 305 1972 May 7, 1972 261

1974 April 8, 1974 143 1971 April 13, 1971 174

1975 May 17, 1975 592 1966 April 26, 1966 167

1976 April 24, 1976 570 1974 April 8, 1974 143

1977 April 30, 1977 141 1977 April 30, 1977 141

1978 April 18, 1978 292 1970 April 12, 1970 122
207

8-0.000-4M HARI RUD RIVER AT ROBAT-I-AKHOND, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[--, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1966 -- -- -- -- -- -- -- 75.8 13.3 3.86 3.35 3.44 --

1967 4.02 4.89 5.59 5.54 8.63 20.0 147 224 78.0 12.6 5.00 4.75 43.4

1968 6.32 8.30 12.0 13.8 16.5 44.7 159 189 77.7 8.40 4.76 5.12 45.4

1969 6.40 10.6 25.5 21.9 25.2 219 419 377 139 27.4 11.6 11.3 108

1970 14.2 28.5 21.2 20.3 18.1 32.3 94.4 48.4 8.22 1.41 1.63 3.08 24.3

1971 4.00 4.79 6.06 6.28 10.8 28.3 99.0 50.0 12.0 7.41 4.75 3.04 19.7

1972 3.23 3.97 3.84 7.21 12.4 55.6 178 194 79.8 14.5 6.66 4.06 46.9

1973 4.45 7.89 11.2 9.48 14.5 52.2 189 207 54.2 9.84 3.73 3.85 47.4

1974 4.28 4.28 6.01 8.55 11.5 50.5 127 78.5 13.6 8.21 6.22 4.80 27.0

1975 4.71 5.59 6.57 8.33 12.5 48.3 275 338 108 22.2 5.65 6.64 70.3

1976 8.35 12.4 17.7 18.1 20.7 37.8 248 366 90.2 16.3 7.27 8.58 71.1

1977 13.9 21.1 18.2 19.0 18.8 45.8 108 96.4 22.3 4.66 4.00 4.08 31.4

1978 4.19 8.79 12.3 12.6 21.0 49.3 152 128 17.3 4.80 3.92 3.67 34.8
208

8-0.000-5M HARI RUD RIVER AT TAGAW GHAZA

(U.S. Geological Survey identification number: 342100063390000)

LOCATION: Lat 34o21'N., long 63o39'E.

DRAINAGE AREA: 11,920 km2

.

ELEVATION: 1,460 meters above mean sea level.

PERIOD OF RECORD: October 1, 1961 to September 30, 1978.

GAGE: Water-stage recorder. Staff gage at same site and datum prior to 1963 water year.

0

10

20

30

40

50

60

70

80

90

100

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
209

8-0.000-5M HARI RUD RIVER AT TAGAW GHAZA, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 12.9 1970 5.34 1972 7.40 1.95 0.26 1.58

November 20.8 1970 5.49 1975 8.23 3.69 0.45 1.76

December 14.6 1970 5.12 1974 7.76 2.44 0.31 1.66

January 15.5 1969 5.18 1975 8.13 3.09 0.38 1.74

February 14.8 1973 6.20 1972 9.59 2.79 0.29 2.05

March 132 1969 10.8 1966 33.6 27.5 0.82 7.17

April 352 1969 43.8 1966 138 68.8 0.50 29.4

May 331 1969 56.0 1971 170 83.5 0.49 36.4

June 124 1969 10.9 1971 56.7 33.3 0.59 12.1

July 31.1 1969 4.26 1971 14.2 7.38 0.52 3.02

August 14.3 1969 3.17 1971 7.54 2.97 0.39 1.61

September 13.7 1969 4.47 1971 7.34 2.32 0.32 1.57

Annual 87.9 1969 17.5 1971 39.1 17.2 0.44 100
210

8-0.000-5M HARI RUD RIVER AT TAGAW GHAZA, Continued 

Monthly and annual flow duration, in cubic meters per second 

[ng, not given] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 5.55 5.20 4.74 4.64 5.37 8.73 27.2 55.2 10.5 4.91 3.66 4.95 5.10

90 5.62 5.39 5.20 5.01 5.94 10.2 43.4 69.2 13.7 5.80 4.39 5.32 5.59

85 5.68 5.58 5.44 5.25 6.34 11.8 53.3 76.3 17.0 6.58 4.78 5.50 5.93

80 5.86 5.77 5.73 5.48 6.86 13.3 68.4 83.7 20.2 7.30 5.25 5.83 6.27

75 6.13 5.93 5.94 5.78 7.11 14.6 76.5 91.8 24.3 7.80 5.45 6.01 6.66

70 6.30 6.10 6.16 6.02 7.40 15.7 81.9 103 27.5 8.51 5.59 6.14 7.04

65 6.64 6.36 6.36 6.25 7.74 16.8 88.0 115 31.0 9.33 5.85 6.22 7.47

60 6.73 6.60 6.53 6.47 8.10 17.8 94.8 129 34.3 10.1 6.20 6.30 8.12

55 6.82 6.82 6.80 6.73 8.51 19.3 104 140 37.5 11.0 6.50 6.42 8.81

50 6.91 7.17 7.27 6.99 8.87 21.2 112 157 42.6 12.0 6.80 6.55 9.74

45 6.99 7.45 7.66 7.28 9.19 22.8 120 169 47.8 12.9 7.13 6.71 10.9

40 7.08 7.65 8.06 7.79 9.42 26.5 128 183 52.9 13.8 7.48 6.87 12.5

35 7.15 7.98 8.36 8.21 9.69 30.4 138 200 58.7 14.8 8.10 7.04 15.2

30 7.23 8.58 8.64 8.61 10.6 33.9 156 216 66.9 16.2 8.55 7.59 19.9

25 7.64 9.26 8.92 9.06 11.4 37.4 179 234 76.5 17.8 9.13 8.59 30.6

20 9.30 9.57 9.32 10.1 12.1 44.8 204 247 88.6 20.1 10.1 8.90 51.1

15 9.54 9.79 10.0 10.9 13.1 54.9 241 263 103 22.6 10.9 10.1 82.9

10 9.71 10.4 10.9 12.9 14.8 65.8 271 286 128 26.7 12.0 10.5 123

5 12.7 16.6 14.1 14.6 16.9 93.4 325 337 150 31.8 13.5 ng 199
211

8-0.000-5M HARI RUD RIVER AT TAGAW GHAZA, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 64.8 64.1 62.2 58.0 56.0

0.95 1.05 99.2 95.7 91.9 85.3 81.4

0.90 1.11 124 118 112 104 98.6

0.80 1.25 162 151 143 131 123

0.50 2 269 239 222 200 185

0.20 5 441 372 339 297 269

0.10 10 569 464 419 362 323

0.04 25 744 586 522 442 390

0.02 50 883 679 599 502 439

0.01 100 1,030 773 677 560 486

0.005 200 1,180 869 756 618 533

0.002 500 1,400 ng ng ng ng

8-0.000-5M HARI RUD RIVER AT TAGAW GHAZA, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 2.95 3.00 3.14 3.34 3.63 4.00 4.35 4.66 4.98

0.10 10 3.38 3.43 3.57 3.78 4.04 4.38 4.70 4.97 5.31

0.20 5 3.96 4.02 4.17 4.38 4.62 4.94 5.21 5.44 5.80

0.50 2 5.28 5.40 5.57 5.83 6.04 6.33 6.55 6.74 7.13
212

8-0.000-5M HARI RUD RIVER AT TAGAW GHAZA, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 3.52 3.99 4.35 4.58 6.53 7.36 8.64 13.0

0.10 10 3.86 4.35 4.70 4.93 7.19 8.19 9.38 14.3

0.20 5 4.34 4.85 5.20 5.43 8.20 9.48 10.6 16.6

0.50 2 5.44 6.02 6.43 6.73 11.0 13.3 14.9 24.4

June-July-August September-October-November

0.05 20 3.21 3.33 3.43 3.65 4.04 4.25 4.43 4.74

0.10 10 3.71 3.87 3.96 4.22 4.36 4.55 4.71 4.99

0.20 5 4.42 4.61 4.71 5.03 4.82 4.99 5.13 5.38

0.50 2 6.19 6.43 6.53 7.00 6.07 6.20 6.29 6.47
213

8-0.000-5M HARI RUD RIVER AT TAGAW GHAZA, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1962 April 26, 1962 297 1969 May 10, 1969 723

1963 May 5, 1963 221 1975 May 17, 1975 670

1964 May 2, 1964 300 1976 May 13, 1976 500

1965 May 22, 1965 350 1967 April 27, 1967 414

1966 May 8, 1966 132 1968 April 30, 1968 351

1967 April 27, 1967 414 1965 May 22, 1965 350

1968 April 30, 1968 351 1973 May 3, 1973 340

1969 May 10, 1969 723 1964 May 2, 1964 300

1970 April 27, 1970 124 1962 April 26, 1962 297

1971 May 2, 1971 97.2 1978 April 17, 1978 282

1972 May 9, 1972 244 1972 May 9, 1972 244

1973 May 3, 1973 340 1963 May 5, 1963 221

1974 April 22, 1974 134 1977 April 19, 1977 146

1975 May 17, 1975 670 1974 April 22, 1974 134

1976 May 13, 1976 500 1966 May 8, 1966 132

1977 April 19, 1977 146 1970 April 27, 1970 124

1978 April 17, 1978 282 1971 May 2, 1971 97.2
214

8-0.000-5M HARI RUD RIVER AT TAGAW GHAZA, Continued 

Monthly and annual mean discharges, in cubic meters per second 

 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1962 5.60 6.04 5.83 6.00 10.9 37.3 157 141 39.3 10.5 6.05 5.68 36.0

1963 7.08 6.99 5.98 6.07 7.77 15.3 62.0 141 63.0 13.4 7.60 7.14 28.7

1964 7.01 10.9 8.41 6.28 9.69 41.7 160 186 47.8 14.6 8.14 6.85 42.3

1965 6.70 6.50 6.50 7.89 10.6 45.7 133 256 99.4 22.7 9.17 8.72 51.3

1966 9.51 9.65 8.41 8.15 9.78 10.8 43.8 84.7 23.3 7.12 5.48 5.71 18.9

1967 6.32 5.93 5.24 5.46 6.47 15.0 117 196 75.6 15.8 7.45 6.18 38.7

1968 5.88 5.66 8.30 7.70 8.36 25.1 127 174 75.4 12.4 6.31 6.59 38.6

1969 6.95 7.93 10.3 15.5 14.3 132 352 331 124 31.1 14.3 13.7 87.9

1970 12.9 20.8 14.6 13.2 13.8 22.7 90.4 69.5 19.1 6.39 4.34 5.82 24.4

1971 7.33 7.56 6.88 6.65 7.23 20.2 75.6 56.0 10.9 4.26 3.17 4.47 17.5

1972 5.34 5.67 5.86 5.66 6.20 23.6 123 195 75.1 18.3 9.09 8.53 40.2

1973 7.11 7.09 7.84 12.2 14.8 42.5 174 187 47.8 12.8 6.87 6.20 43.9

1974 5.79 5.51 5.12 5.18 6.57 36.4 108 87.0 24.5 8.29 5.54 5.76 25.4

1975 6.07 5.49 5.28 5.18 6.48 27.2 192 285 102 24.4 12.4 10.5 57.1

1976 9.35 9.60 10.1 10.7 11.5 18.6 178 294 79.6 21.8 11.4 10.2 55.5

1977 9.78 10.4 9.62 9.63 9.58 34.9 110 86.3 26.8 8.14 6.17 6.58 27.4

1978 7.08 8.16 7.71 6.80 9.05 21.8 140 126 31.0 8.56 4.70 6.11 31.4
215

8-0.000-7M HARI RUD RIVER AT CHEKHCHERAN

(U.S. Geological Survey identification number: 343100065150000)

LOCATION: Lat 34o31'N., long 65o15'E.

DRAINAGE AREA: 6,090 km2.

ELEVATION: 2,250 meters above mean sea level.

PERIOD OF RECORD: October 1, 1961 to September 30, 1978.

GAGE: Water-stage recorder.

0

10

20

30

40

50

60

70

80

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
216

8-0.000-7M HARI RUD RIVER AT CHEKHCHERAN, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 7.42 1970 3.47 1972 5.48 1.10 0.20 1.44

November 10.5 1970 3.33 1971 5.53 1.67 0.30 1.45

December 6.66 1970 2.42 1965 4.96 1.10 0.22 1.30

January 6.60 1976 3.03 1965 4.75 1.02 0.21 1.25

February 8.30 1969 4.36 1974 5.78 1.11 0.19 1.52

March 74.4 1969 5.75 1966 19.4 16.4 0.85 5.10

April 255 1969 38.6 1966 110 50.1 0.45 29.0

May 309 1969 55.3 1971 153 80.4 0.52 40.3

June 104 1975 11.2 1971 48.0 28.1 0.59 12.6

July 23.2 1969 3.06 1971 11.3 5.72 0.51 2.97

August 11.1 1969 3.00 1971 5.80 2.12 0.37 1.53

September 8.74 1969 3.00 1971 5.79 1.59 0.27 1.52

Annual 67.0 1969 14.9 1971 31.8 13.6 0.43 100
217

8-0.000-7M HARI RUD RIVER AT CHEKHCHERAN, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 3.83 3.24 2.50 2.97 3.95 5.12 15.0 53.1 9.65 3.21 3.12 3.08 3.45

90 3.90 3.85 3.50 3.33 4.03 5.35 28.5 67.4 11.5 4.90 3.61 3.86 3.99

85 4.36 4.02 3.67 3.48 4.38 5.77 36.9 72.1 14.0 5.56 3.75 3.99 4.35

80 4.61 4.31 4.05 3.73 4.44 6.66 47.0 75.8 16.6 5.88 3.85 4.31 4.69

75 4.67 4.42 4.14 3.93 4.67 7.32 53.8 81.7 19.6 6.46 3.97 4.87 4.96

70 4.81 4.54 4.37 4.21 5.01 7.96 58.8 87.7 22.3 7.22 4.40 4.93 5.22

65 4.98 4.70 4.48 4.29 5.07 8.63 66.9 94.4 25.2 7.87 4.68 4.99 5.48

60 5.08 4.93 4.66 4.40 5.13 9.31 75.8 103 28.6 8.46 4.85 5.23 5.81

55 5.24 5.08 4.73 4.59 5.39 10.4 82.0 114 32.1 8.88 5.01 5.38 6.15

50 5.39 5.20 4.84 4.82 5.50 11.6 89.4 129 36.3 9.26 5.22 5.62 6.48

45 5.66 5.43 5.11 4.90 5.87 12.8 98.0 147 40.2 9.75 5.46 5.71 7.13

40 5.76 5.65 5.28 4.97 5.97 14.7 106 160 43.7 10.5 5.83 6.03 7.91

35 6.00 5.82 5.49 5.23 6.03 15.7 114 173 47.6 11.5 6.52 6.41 9.47

30 6.33 5.96 5.64 5.48 6.10 17.2 125 192 53.5 12.6 6.78 6.60 12.9

25 6.38 6.10 5.75 5.65 6.33 19.9 147 210 63.5 14.1 7.11 6.96 21.1

20 6.44 6.47 6.07 5.97 6.67 23.2 172 229 74.1 15.7 7.43 7.32 38.3

15 6.50 6.85 6.28 6.05 7.33 31.8 203 251 89.0 18.6 7.91 7.89 68.6

10 7.13 7.26 6.55 6.14 7.96 40.4 230 273 109 21.9 8.73 8.23 100

5 7.30 8.33 7.04 6.46 9.38 66.3 270 320 133 26.3 10.4 8.54 169
218

8-0.000-7M HARI RUD RIVER AT CHEKHCHERAN, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 60.4 60.0 57.4 52.9 49.8

0.95 1.05 86.8 85.3 81.3 75.5 70.7

0.90 1.11 106 103 98.1 91.1 85.0

0.80 1.25 136 130 123 114 106

0.50 2 224 206 191 174 159

0.20 5 381 329 298 264 236

0.10 10 508 423 376 327 288

0.04 25 697 554 484 409 356

0.02 50 860 662 569 473 407

0.01 100 1,040 777 659 538 458

0.005 200 1,250 902 754 605 510

0.002 500 1,550 ng ng ng ng

8-0.000-7M HARI RUD RIVER AT CHEKHCHERAN, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 2.40 2.46 2.51 2.53 2.61 2.73 3.08 3.27 3.67

0.10 10 2.62 2.69 2.77 2.80 2.92 3.10 3.41 3.59 3.94

0.20 5 2.91 3.00 3.11 3.17 3.31 3.56 3.83 4.00 4.31

0.50 2 3.58 3.71 3.87 3.97 4.16 4.51 4.68 4.86 5.12
219

8-0.000-7M HARI RUD RIVER AT CHEKHCHERAN, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 2.48 2.65 2.70 2.79 3.77 4.24 4.51 5.97

0.10 10 2.74 2.93 3.01 3.14 4.24 4.74 5.15 6.92

0.20 5 3.06 3.30 3.40 3.58 4.92 5.47 6.11 8.50

0.50 2 3.76 4.07 4.19 4.44 6.76 7.38 8.78 13.7

June-July-August September-October-November

0.05 20 2.94 2.99 3.04 3.13 2.73 2.81 2.96 3.15

0.10 10 3.23 3.31 3.37 3.50 3.06 3.14 3.31 3.54

0.20 5 3.67 3.77 3.84 4.02 3.50 3.59 3.78 4.03

0.50 2 4.77 4.93 5.02 5.34 4.44 4.59 4.80 5.08
220

8-0.000-7M HARI RUD RIVER AT CHEKHCHERAN, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1962 April 21, 1962 158 1969 May 5, 1969 693

1963 May 5, 1963 158 1975 May 16, 1975 610

1964 May 2, 1964 277 1976 May 12, 1976 438

1965 May 4, 1965 285 1968 April 29, 1968 348

1966 May 6, 1966 109 1967 April 26, 1967 334

1967 April 26, 1967 334 1965 May 4, 1965 285

1968 April 29, 1968 348 1978 April 16, 1978 280

1969 May 5, 1969 693 1964 May 2, 1964 277

1970 April 25, 1970 118 1973 May 1, 1973 275

1971 April 30, 1971 97.6 1972 April 27, 1972 235

1972 April 27, 1972 235 1962 April 21, 1962 158

1973 May 1, 1973 275 1963 May 5, 1963 158

1974 April 16, 1974 106 1977 April 19, 1977 129

1975 May 16, 1975 610 1970 April 25, 1970 118

1976 May 12, 1976 438 1966 May 6, 1966 109

1977 April 19, 1977 129 1974 April 16, 1974 106

1978 April 16, 1978 280 1971 April 30, 1971 97.6
221

8-0.000-7M HARI RUD RIVER AT CHEKHCHERAN, Continued 

Monthly and annual mean discharges, in cubic meters per second 

 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1962 4.81 4.62 4.68 3.77 4.79 23.6 94.4 93.8 30.1 10.1 5.83 6.12 23.9

1963 6.42 5.37 4.22 3.80 6.13 12.9 48.8 96.6 40.4 11.2 6.98 7.56 20.9

1964 6.09 6.45 6.03 4.50 7.50 25.3 126 170 41.8 11.4 5.30 5.72 34.7

1965 5.17 4.21 2.42 3.03 5.83 20.4 89.0 216 73.0 22.0 8.61 7.89 38.3

1966 7.12 7.02 5.96 6.00 5.39 5.75 38.6 80.9 21.5 5.90 3.69 3.88 16.0

1967 4.13 3.96 3.99 4.23 4.83 8.46 94.3 174 71.9 12.3 4.75 5.47 32.8

1968 5.72 5.61 4.69 4.24 4.84 8.62 112 153 67.2 11.8 8.02 7.48 32.8

1969 6.46 6.37 6.39 5.64 8.30 74.4 255 309 87.0 23.2 11.1 8.74 67.0

1970 7.42 10.5 6.66 6.00 6.40 9.73 68.4 66.6 17.5 6.61 3.90 4.06 17.8

1971 4.17 3.33 4.00 5.00 6.00 16.0 64.8 55.3 11.2 3.06 3.00 3.00 14.9

1972 3.47 5.13 5.40 4.63 5.94 14.1 109 166 59.5 10.2 5.09 5.17 32.8

1973 4.93 4.50 4.60 4.48 4.43 12.7 141 181 41.8 9.92 5.02 4.90 35.1

1974 4.59 4.14 4.47 4.55 4.36 32.9 93.7 80.7 18.6 5.51 3.91 4.87 21.9

1975 4.77 4.62 3.95 3.24 4.38 10.4 154 279 104 19.2 7.26 6.90 50.3

1976 5.75 5.43 5.20 6.60 6.40 6.91 135 283 79.3 15.0 7.12 6.82 47.0

1977 6.41 6.97 5.70 5.84 6.63 31.5 101 79.2 23.9 6.74 5.12 5.58 23.8

1978 5.72 5.82 5.97 5.25 6.18 15.8 149 120 27.3 7.76 3.90 4.27 29.7
222

8-0.000-9M HARI RUD RIVER AT DAULATYAR

(U.S. Geological Survey identification number: 343300065460000)

LOCATION: Lat 34o33'N., long 65o46'E.

DRAINAGE AREA: 2,840 km2.

ELEVATION: 2,440 meters above mean sea level.

PERIOD OF RECORD: August 6, 1969 to September 30, 1978.

GAGE: Water-stage recorder.

0

5

10

15

20

25

30

35

40

45

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
223

8-0.000-9M HARI RUD RIVER AT DAULATYAR, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 5.73 1970 2.29 1972 3.75 0.97 0.26 1.41

November 7.29 1970 2.57 1972 3.66 1.42 0.39 1.37

December 5.46 1970 2.71 1973 3.38 0.86 0.25 1.27

January 4.96 1970 2.40 1975 3.46 0.86 0.25 1.30

February 5.39 1977 2.96 1975 3.86 0.82 0.21 1.45

March 27.3 1977 5.07 1976 11.7 7.86 0.67 4.38

April 126 1978 58.2 1970 81.5 25.1 0.31 30.6

May 257 1976 36.3 1971 108 72.4 0.67 40.5

June 65.6 1976 7.53 1971 30.9 22.1 0.71 11.6

July 15.4 1975 2.90 1971 7.50 3.79 0.51 2.82

August 6.48 1976 2.20 1971 4.29 1.33 0.31 1.61

September 6.59 1969 2.42 1971 4.36 1.26 0.29 1.64

Annual 40.3 1976 11.7 1971 22.2 8.91 0.40 100
224

8-0.000-9M HARI RUD RIVER AT DAULATYAR, Continued 

Monthly and annual flow duration, in cubic meters per second 

[ng, not given] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 2.27 2.05 2.44 2.35 2.91 3.37 19.0 27.9 6.73 2.84 2.30 2.40 2.52

90 2.47 2.54 2.50 2.52 3.00 3.56 27.0 36.9 7.68 3.50 2.50 2.86 2.95

85 3.06 2.89 2.63 2.93 3.04 3.85 32.3 45.5 8.53 3.95 3.23 3.27 3.08

80 3.10 2.98 2.69 2.95 3.07 4.35 39.1 50.4 9.35 4.28 3.34 3.36 3.21

75 3.14 3.06 2.76 2.97 3.12 4.62 45.3 53.4 11.0 4.50 3.39 3.46 3.34

70 3.22 3.13 2.90 2.99 3.17 4.86 52.3 57.8 12.8 4.74 3.45 3.52 3.48

65 3.28 3.21 3.02 3.01 3.33 5.23 55.6 62.1 14.1 5.07 3.50 3.59 3.73

60 3.32 3.27 3.10 3.18 3.41 5.82 60.2 66.2 16.3 5.57 3.70 3.75 3.98

55 3.37 3.31 3.15 3.22 3.50 6.16 65.1 73.3 17.9 5.92 3.89 4.12 4.28

50 3.66 3.35 3.19 3.26 3.88 6.55 68.9 78.8 20.8 6.18 4.08 4.25 4.65

45 3.78 3.39 3.27 3.37 3.97 7.43 73.1 87.9 24.2 6.79 4.37 4.45 5.07

40 3.90 3.43 3.34 3.39 4.00 8.28 78.0 102 28.3 7.08 4.49 4.57 5.59

35 4.00 3.48 3.41 3.41 4.03 8.95 84.5 114 31.3 7.69 4.61 4.85 6.50

30 4.05 3.53 3.46 3.43 4.06 12.3 93.3 130 34.3 8.07 4.95 4.99 8.06

25 4.10 3.59 3.51 3.48 4.26 14.6 103 146 39.0 8.37 5.09 5.15 14.2

20 4.29 3.88 3.78 4.25 4.54 16.2 109 160 44.2 9.83 5.59 5.56 26.1

15 4.47 4.11 4.22 4.59 4.66 18.5 129 178 55.2 10.9 5.87 5.86 47.5

10 5.38 5.92 5.17 4.87 4.99 26.9 146 229 68.5 14.0 6.04 5.98 68.1

5 5.70 7.14 ng 5.27 5.87 46.3 189 286 91.8 18.1 6.81 6.44 112
225

8-0.000-9M HARI RUD RIVER AT DAULATYAR, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge1 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 49.7 44.7 43.3 42.1 39.4

0.95 1.05 66.6 61.5 58.9 56.3 52.3

0.90 1.11 79.2 73.8 70.2 66.4 61.4

0.80 1.25 99.2 93.1 87.8 81.9 75.2

0.50 2 161 151 139 126 114

0.20 5 279 256 232 203 179

0.10 10 384 345 308 264 230

0.04 25 551 483 423 355 304

0.02 50 705 604 523 433 366

0.01 100 888 744 638 520 435

0.005 200 1,100 905 768 618 511

0.002 500 1,450 ng ng ng ng

1

Less than 10 years of data used.

8-0.000-9M HARI RUD RIVER AT DAULATYAR, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 1.42 1.50 1.60 1.78 2.04 2.19 2.29 2.35 2.62

0.10 10 1.59 1.68 1.78 1.94 2.20 2.33 2.43 2.50 2.74

0.20 5 1.81 1.90 2.01 2.15 2.41 2.52 2.61 2.68 2.91

0.50 2 2.28 2.39 2.51 2.60 2.81 2.91 2.99 3.08 3.30
226

8-0.000-9M HARI RUD RIVER AT DAULATYAR, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 1.77 1.97 2.16 2.41 2.79 2.95 3.33 4.36

0.10 10 1.89 2.10 2.26 2.50 3.08 3.19 3.49 4.89

0.20 5 2.07 2.29 2.41 2.64 3.49 3.57 3.79 5.76

0.50 2 2.53 2.76 2.82 3.03 4.57 4.68 4.86 8.64

June-July-August September-October-November

0.05 20 1.80 1.96 2.09 2.28 1.49 1.71 1.88 2.16

0.10 10 2.20 2.34 2.46 2.65 1.73 1.94 2.09 2.34

0.20 5 2.72 2.85 2.94 3.13 2.06 2.25 2.38 2.60

0.50 2 3.82 3.90 3.97 4.19 2.82 2.97 3.07 3.24

8-0.000-9M HARI RUD RIVER AT DAULATYAR, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1970 April 25, 1970 107 1975 May 14, 1975 446

1971 April 22, 1971 92.0 1976 April 24, 1976 350

1972 April 28, 1972 157 1978 April 15, 1978 299

1973 May 1, 1973 170 1973 May 1, 1973 170

1974 April 12, 1974 81.8 1972 April 28, 1972 157

1975 May 14, 1975 446 1977 April 18, 1977 111

1976 April 24, 1976 350 1970 April 25, 1970 107

1977 April 18, 1977 111 1971 April 22, 1971 92.0

1978 April 15, 1978 299 1974 April 12, 1974 81.8
227

8-0.000-9M HARI RUD RIVER AT DAULATYAR, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[--, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1969 -- -- -- -- -- -- -- -- -- -- -- 6.59 --

1970 5.73 7.29 5.46 4.96 4.71 7.28 58.2 46.6 11.6 4.85 3.35 3.35 13.6

1971 3.19 2.71 2.82 3.40 4.00 11.1 62.1 36.3 7.53 2.90 2.20 2.42 11.7

1972 2.29 2.57 3.12 3.02 4.00 7.23 67.5 110 46.9 8.58 4.62 4.81 22.1

1973 4.16 3.59 2.71 3.00 3.00 8.91 88.0 113 29.0 8.47 4.65 4.23 22.8

1974 4.01 3.39 3.35 3.20 3.10 22.7 62.0 53.3 13.8 5.09 3.44 3.46 15.1

1975 3.27 3.20 2.86 2.40 2.96 5.90 64.2 187 62.6 15.4 5.89 5.25 30.3

1976 3.68 3.08 2.98 3.02 3.48 5.07 115 257 65.6 10.7 6.48 5.75 40.3

1977 4.28 3.86 3.90 4.80 5.39 27.3 90.9 69.8 20.3 5.37 3.60 3.42 20.3

1978 3.17 3.26 3.19 3.35 4.05 9.53 126 98.8 20.9 6.15 4.39 4.31 24.0
228

8-1.R00-9T SENJAB RIVER AT KHUSH RABAT

(U.S. Geological Survey identification number: 344100062070000)

LOCATION: Lat 34o41'N., long 62o07'E.

DRAINAGE AREA: 65 km2

.

ELEVATION: 1,320 meters above mean sea level.

PERIOD OF RECORD: May 24, 1969 to September 30, 1978.

GAGE: Water-stage recorder. Staff gage at same site and datum prior to 1970 water year.

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
229

8-1.R00-9T SENJAB RIVER AT KHUSH RABAT, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 0.06 1975 0 1972 0.01 0.02 1.57 0.33

November 0.37 1972 0 1974 0.13 0.13 1.06 3.18

December 0.99 1978 0.01 1974 0.22 0.33 1.47 5.68

January 1.33 1972 0.06 1971 0.59 0.50 0.85 14.9

February 1.62 1972 0.06 1971 0.61 0.62 1.02 15.4

March 2.62 1972 0.20 1971 1.12 0.81 0.72 28.5

April 2.44 1975 0.24 1973 1.05 0.95 0.90 26.7

May 0.27 1976 0.04 1973 0.13 0.08 0.60 3.38

June 0.13 1969 0 1971 0.05 0.05 1.09 1.20

July 0.08 1972 0 1971 0.02 0.03 1.31 0.54

August 0.03 1972 0 1969 0.01 0.01 1.68 0.19

September 0.02 1976 0 1969 0 0.01 1.74 0.12

Annual 0.61 1972 0.06 1971 0.32 0.22 0.69 100
230

8-1.R00-9T SENJAB RIVER AT KHUSH RABAT, Continued 

Monthly and annual flow duration, in cubic meters per second 

[ng, not given] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 0 0 0 0.01 0.03 0.02 0.10 0.02 0 0 0 0 0

90 0 0 0 0.02 0.05 0.03 0.14 0.03 0 0 0 0 0

85 0 0 0.01 0.02 0.06 0.08 0.17 0.04 0 0 0 0 0

80 0 0.01 0.02 0.02 0.08 0.25 0.20 0.05 0.01 0 0 0 0

75 0 0.01 0.02 0.03 0.08 0.36 0.23 0.06 0.01 0 0 0 0

70 0 0.01 0.02 0.08 0.09 0.44 0.27 0.07 0.01 0 0 0 0.01

65 0 0.02 0.03 0.09 0.10 0.50 0.29 0.09 0.02 0 0 0 0.02

60 0 0.02 0.03 0.10 0.14 0.57 0.31 0.10 0.02 0.01 0 0 0.02

55 0 0.02 0.04 0.13 0.21 0.70 0.40 0.10 0.02 0.01 0 0 0.03

50 0 0.03 0.04 0.20 0.26 0.77 0.47 0.11 0.03 0.02 0 0 0.04

45 0.01 0.04 0.05 0.26 0.33 0.86 0.56 0.11 0.03 0.02 0 0 0.05

40 0.01 0.04 0.06 0.34 0.51 1.00 0.72 0.13 0.04 0.02 0 0 0.07

35 0.01 0.05 0.07 0.47 0.64 1.12 0.79 0.14 0.05 0.02 0 0 0.09

30 0.02 0.05 0.08 0.57 0.78 1.23 0.89 0.15 0.07 0.03 0.01 0 0.12

25 0.02 0.07 0.10 0.72 0.99 1.37 1.06 0.18 0.09 0.03 0.02 0.01 0.21

20 0.03 0.10 0.15 0.89 1.20 1.53 1.37 0.2 0.11 0.05 0.02 0.02 0.30

15 0.04 0.20 0.30 1.07 1.36 1.83 2.17 0.23 0.12 0.06 0.03 0.02 0.57

10 ng 0.28 0.37 1.45 1.60 2.47 2.97 0.27 0.13 0.08 0.03 0.02 0.92

5 ng 0.52 0.87 2.55 1.98 3.49 4.06 0.37 0.16 ng 0.04 0.03 1.5
231

8-1.R00-9T SENJAB RIVER AT KHUSH RABAT, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge1 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 4.40 0.72 0.49 0.29 0.21

0.95 1.05 6.50 1.19 0.78 0.49 0.37

0.90 1.11 8.10 1.54 0.99 0.66 0.50

0.80 1.25 10.7 2.12 1.35 0.93 0.71

0.50 2 18.6 3.85 2.43 1.79 1.34

0.20 5 33.7 6.90 4.47 3.42 2.48

0.10 10 46.7 9.31 6.18 4.78 3.37

0.04 25 67.0 12.8 8.79 6.84 4.64

0.02 50 85.1 15.6 11.1 8.60 5.68

0.01 100 106 18.7 13.6 10.6 6.78

0.005 200 130 22.0 16.5 12.7 7.96

0.002 500 168 ng ng ng ng

1

Less than 10 years of data used.

8-1.R00-9T SENJAB RIVER AT KHUSH RABAT, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second; ng, not given] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 ng ng ng ng ng 0 0 0 0

0.10 10 ng ng ng ng ng 0 0 0 0

0.20 5 ng ng ng ng ng 0 0 0 0

0.50 2 ng ng ng ng ng 0 0 0 0.01
232

8-1.R00-9T SENJAB RIVER AT KHUSH RABAT, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second; ng, not given] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 0 0 0 0.01 0 0 0.01 0.03

0.10 10 0 0 0 0.01 0 0.01 0.01 0.04

0.20 5 0 0 0.01 0.01 0.01 0.01 0.02 0.06

0.50 2 0 0.02 0.02 0.04 0.04 0.05 0.06 0.11

June-July-August September-October-November

0.05 20 0 0 0 0 ng ng ng ng

0.10 10 0 0 0 0 ng ng ng ng

0.20 5 0 0 0 0 ng ng ng ng

0.50 2 0 0 0 0 ng ng ng ng

8-1.R00-9T SENJAB RIVER AT KHUSH RABAT, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1970 April 13, 1970 7.38 1976 April 22, 1976 54.0

1971 March 30, 1971 17.0 1972 April 14, 1972 48.0

1972 April 14, 1972 48.0 1978 December 24, 1977 27.4

1973 February 23, 1973 18.1 1973 February 23, 1973 18.1

1974 April 1, 1974 14.6 1975 March 20, 1975 17.5

1975 March 20, 1975 17.5 1971 March 30, 1971 17.0

1976 April 22, 1976 54.0 1974 April 1, 1974 14.6

1977 April 22, 1977 8.40 1977 April 22, 1977 8.40

1978 December 24, 1977 27.4 1970 April 13, 1970 7.38
233

8-1.R00-9T SENJAB RIVER AT KHUSH RABAT, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[--, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1969 -- -- -- -- -- -- -- -- 0.13 0.03 0 0 --

1970 0.01 0.12 0.03 0.15 0.09 0.25 0.41 0.05 0.01 0 0 0 0.09

1971 0 0.02 0.02 0.06 0.06 0.20 0.28 0.09 0 0 0 0 0.06

1972 0 0.37 0.05 1.33 1.62 2.62 0.92 0.20 0.12 0.08 0.03 0.01 0.61

1973 0 0.01 0.05 0.36 0.38 1.01 0.24 0.04 0 0 0 0 0.17

1974 0 0 0.01 1.19 0.56 1.94 2.23 0.17 0.04 0.02 0.02 0.02 0.52

1975 0.06 0.04 0.38 0.91 1.54 1.44 2.44 0.17 0.01 0 0 0 0.58

1976 0.01 0.18 0.41 0.27 -- 0.62 2.17 0.27 0.11 0.06 0.02 0.02 --

1977 0.03 0.10 0.07 0.91 0.37 0.63 0.46 0.06 0.02 0.01 0 0 0.22

1978 0.01 0.30 0.99 0.09 0.25 1.37 0.28 0.16 0.03 0.01 0 0 0.29
234

8-2.R00-3A KARUKH RIVER NEAR HERAT

(U.S. Geological Survey identification number: 342600062280000)

LOCATION: Lat 34o26'N., long 62o28'E.

DRAINAGE AREA: 1,390 km2.

ELEVATION: 1,145 meters above mean sea level.

PERIOD OF RECORD: December 11, 1973 to September 30, 1977.

GAGE: Water-stage recorder.

0

1

2

3

4

5

6

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
235

8-2.R00-3A KARUKH RIVER NEAR HERAT, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 1.30 1974 0.99 1975 1.16 0.14 0.12 3.38

November 1.53 1977 1.19 1975 1.36 0.15 0.11 3.96

December 2.48 1977 1.31 1975 1.70 0.53 0.31 4.97

January 2.31 1973 0.78 1975 1.83 0.67 0.36 5.35

February 5.63 1976 2.13 1975 3.40 1.32 0.39 9.94

March 17.8 1976 4.37 1977 8.40 5.39 0.64 24.5

April 17.5 1976 3.31 1973 9.45 6.63 0.70 27.6

May 13.7 1976 0.96 1973 4.33 5.39 1.24 12.7

June 0.90 1976 0.40 1974 0.59 0.21 0.35 1.73

July 1.00 1976 0.46 1977 0.62 0.22 0.37 1.80

August 0.95 1976 0.41 1973 0.60 0.21 0.34 1.75

September 1.02 1973 0.61 1975 0.79 0.16 0.21 2.32

Annual 5.33 1976 1.92 1977 3.06 1.57 0.51 100
236

8-2.R00-3A KARUKH RIVER NEAR HERAT, Continued 

Monthly and annual flow duration, in cubic meters per second 

[ng, not given] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 0.96 1.10 0.85 0.55 1.29 3.34 2.02 0.52 0.37 0.44 0.40 0.51 0.45

90 0.96 1.10 0.99 0.73 1.78 3.40 2.99 0.55 0.39 0.47 0.40 0.52 0.49

85 0.97 1.11 1.31 0.75 2.29 3.46 3.13 0.76 0.40 0.48 0.41 0.59 0.54

80 1.00 1.23 1.33 1.36 2.38 3.57 3.97 0.83 0.41 0.49 0.45 0.61 0.63

75 1.01 1.24 1.35 1.41 2.42 4.00 4.17 0.93 0.41 0.49 0.51 0.67 0.74

70 1.10 1.25 1.37 1.52 2.45 4.67 4.61 0.97 0.42 0.50 0.52 0.70 0.82

65 1.10 1.30 1.39 1.56 2.49 4.92 4.86 1.01 0.44 0.50 0.52 0.70 0.96

60 1.11 1.31 1.41 1.60 2.54 6.03 5.03 1.06 0.59 0.50 0.52 0.71 1.06

55 1.15 1.32 1.43 1.69 2.61 6.24 5.20 1.16 0.60 0.50 0.53 0.71 1.19

50 1.20 1.40 1.46 1.83 2.70 6.49 6.13 1.99 0.60 0.51 0.55 0.76 1.29

45 1.21 1.41 1.51 1.96 2.82 6.91 8.07 2.11 0.61 0.51 0.56 0.79 1.37

40 1.23 1.41 1.72 2.02 2.89 7.25 9.11 2.22 0.61 0.56 0.60 0.80 1.45

35 1.29 1.42 1.80 2.08 2.95 7.93 10.1 2.45 0.62 0.61 0.60 0.81 1.89

30 1.29 1.42 1.85 2.15 3.02 8.32 11.6 3.07 0.64 0.62 0.61 0.91 2.23

25 1.30 1.42 1.89 2.46 3.69 8.79 13.6 4.01 0.71 0.62 0.61 0.92 2.91

20 1.30 1.43 1.93 2.51 4.06 9.31 14.9 7.50 0.73 0.63 0.78 0.93 3.57

15 1.31 1.52 1.97 2.55 6.45 10.3 17.5 9.78 0.81 ng ng 1.01 4.92

10 ng 1.62 2.01 2.65 6.84 14.8 19.1 14.7 0.83 ng ng 1.08 7.74

5 ng ng 3.13 2.94 7.58 ng 20 18.4 1.05 ng ng ng 14.3
237

8-2.R00-3A KARUKH RIVER NEAR HERAT, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge1 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 9.80 5.85 3.56 2.79 2.47

0.95 1.05 10.3 7.10 5.15 4.34 3.90

0.90 1.11 10.9 8.11 6.34 5.50 4.95

0.80 1.25 12.4 9.84 8.24 7.35 6.57

0.50 2 20.0 15.9 14.0 12.9 11.1

0.20 5 49.7 30.2 25.0 22.9 18.3

0.10 10 98.0 45.1 34.4 31.0 23.6

0.04 25 239 73.3 49.1 43.0 30.8

0.02 50 468 103 62.2 53.3 36.4

0.01 100 916 144 77.4 64.6 42.2

0.005 200 1,790 199 94.9 77.2 48.2

0.002 500 4,390 ng ng ng ng

1

Less than 10 years of data used.

8-2.R00-3A KARUKH RIVER NEAR HERAT, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second; ng, not given] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 ng ng ng ng ng ng ng ng ng

0.10 10 ng ng ng ng ng ng ng ng ng

0.20 5 ng ng ng ng ng ng ng ng ng

0.50 2 ng ng ng ng ng ng ng ng ng
238

8-2.R00-3A KARUKH RIVER NEAR HERAT, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second; ng, not given] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 0.33 0.33 0.39 0.51 0.32 0.45 0.49 0.62

0.10 10 0.48 0.49 0.54 0.67 0.37 0.47 0.53 0.74

0.20 5 0.70 0.73 0.77 0.90 0.44 0.53 0.62 0.98

0.50 2 1.22 1.28 1.31 1.44 0.69 0.81 1.07 2.03

June-July-August September-October-November

0.05 20 0.31 0.32 0.33 0.35 ng ng ng ng

0.10 10 0.33 0.34 0.34 0.36 ng ng ng ng

0.20 5 0.35 0.36 0.37 0.38 ng ng ng ng

0.50 2 0.42 0.43 0.44 0.45 ng ng ng ng

8-2.R00-3A KARUKH RIVER NEAR HERAT, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1973 January 16, 1973 21.4 1976 April 22, 1976 150

1974 April 1, 1974 13.0 1975 April 18, 1975 22.5

1975 April 18, 1975 22.5 1973

January 16, 

1973 21.4

1976 April 22, 1976 150 1977 March 28, 1977 15.0

1977 March 28, 1977 15.0 1974 April 1, 1974 13.0
239

8-2.R00-3A KARUKH RIVER NEAR HERAT, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[--, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1973 -- -- -- 2.31 3.18 7.54 3.31 0.96 0.60 0.50 0.41 1.02 --

1974 1.30 1.40 1.45 2.23 3.24 6.57 6.08 1.15 0.40 0.50 0.60 0.72 2.13

1975 0.99 1.19 1.31 0.78 2.13 5.71 15.7 4.14 0.66 0.62 0.51 0.61 2.85

1976 1.23 1.30 1.57 1.54 5.63 17.8 17.5 13.7 0.90 1.00 0.95 0.90 5.33

1977 1.10 1.53 2.48 2.29 2.83 4.37 4.64 1.72 0.41 0.46 0.53 0.73 1.92
240

8-3.L00-1A KOWGAN RIVER AT LANGAR

(U.S. Geological Survey identification number: 341300063000000)

LOCATION: Lat 34o13'N., long 63o00'E.

DRAINAGE AREA: 7,490 km2

.

ELEVATION: 1,230 meters above mean sea level.

PERIOD OF RECORD: April 25, 1962 to September 30, 1978.

GAGE: Water-stage recorder. Staff gage at same site and datum prior to 1965 water year.

0

2

4

6

8

10

12

14

16

18

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
241

8-3.L00-1A KOWGAN RIVER AT LANGAR, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 5.68 1977 1.41 1964 3.03 1.38 0.46 3.51

November 8.72 1970 2.09 1972 4.40 2.02 0.46 5.10

December 8.42 1969 2.25 1964 4.42 1.75 0.40 5.12

January 7.38 1969 1.81 1964 4.43 1.64 0.37 5.14

February 11.1 1969 2.99 1972 5.94 2.16 0.36 6.89

March 43.3 1969 4.27 1963 13.7 9.05 0.66 15.9

April 66.0 1969 5.51 1963 25.1 18.9 0.75 29.2

May 42.2 1975 1.86 1971 15.4 13.0 0.84 17.9

June 11.0 1975 0.77 1963 3.91 3.31 0.85 4.53

July 5.10 1975 0.19 1963 1.84 1.54 0.83 2.14

August 4.50 1974 0.29 1963 1.74 1.35 0.77 2.02

September 4.79 1969 0.86 1966 2.29 1.25 0.54 2.66

Annual 16.2 1969 3.12 1971 7.36 3.84 0.52 100
242

8-3.L00-1A KOWGAN RIVER AT LANGAR, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 1.39 1.94 2.31 1.67 2.84 4.22 5.07 2.12 0.29 0.19 0.22 0.62 0.60

90 1.52 2.49 2.62 2.20 3.19 4.70 7.12 2.66 0.57 0.23 0.29 0.92 1.11

85 1.66 2.64 2.81 2.59 3.61 5.34 8.16 3.27 0.77 0.33 0.40 1.15 1.43

80 1.78 2.72 2.98 2.93 3.86 5.79 8.72 3.82 0.93 0.45 0.65 1.25 1.76

75 1.96 2.81 3.10 3.35 4.17 6.47 9.51 4.40 1.18 0.65 0.82 1.34 2.13

70 2.17 2.94 3.23 3.60 4.48 7.26 11.0 5.27 1.37 0.78 0.90 1.47 2.51

65 2.27 3.06 3.36 3.73 4.67 7.75 12.7 6.30 1.55 0.91 0.97 1.61 2.91

60 2.39 3.28 3.50 3.88 4.93 8.61 14.2 7.38 1.73 1.04 1.08 1.73 3.30

55 2.49 3.46 3.63 4.09 5.22 9.14 15.6 8.39 1.95 1.17 1.18 1.85 3.69

50 2.58 3.59 3.80 4.29 5.39 9.82 17.0 9.75 2.19 1.30 1.31 1.95 4.04

45 2.70 3.73 4.05 4.48 5.56 10.8 18.8 10.8 2.60 1.44 1.43 2.07 4.40

40 2.95 4.11 4.40 4.68 5.85 11.7 21.8 13.2 3.06 1.64 1.55 2.20 4.78

35 3.24 4.32 4.81 4.88 6.31 12.7 26.3 15.6 3.62 2.00 1.69 2.37 5.40

30 3.43 4.59 5.09 5.08 6.74 14.6 29.3 18.5 4.58 2.30 1.85 2.55 6.02

25 3.89 4.95 5.50 5.40 7.20 16.4 32.5 21.9 5.55 2.64 2.24 2.98 7.11

20 4.36 5.57 5.86 5.88 7.66 18.2 37.0 26.6 6.81 3.55 3.43 3.56 8.61

15 5.05 6.13 6.42 6.25 8.20 21.7 42.5 33.3 8.22 4.01 3.70 4.16 11.3

10 5.25 6.97 6.71 6.56 9.42 26.7 52.8 37.9 10.0 4.40 4.00 4.62 16.6

5 5.65 8.19 7.21 7.09 10.8 41.7 70.8 47.1 12.2 4.90 4.41 4.94 29.6
243

8-3.L00-1A KOWGAN RIVER AT LANGAR, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 18.1 11.5 8.82 7.54 5.91

0.95 1.05 25.6 15.2 12.1 10.5 8.54

0.90 1.11 31.4 18.2 14.6 12.7 10.5

0.80 1.25 40.9 23.0 18.7 16.2 13.7

0.50 2 71.4 39.0 32.0 27.4 23.4

0.20 5 134 73.7 59.7 49.6 41.9

0.10 10 192 108 85.7 69.6 57.8

0.04 25 289 167 129 102 82.8

0.02 50 381 225 172 132 105

0.01 100 493 300 224 169 131

0.005 200 629 394 288 212 161

0.002 500 853 ng ng ng ng

8-3.L00-1A KOWGAN RIVER AT LANGAR, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 0 0 0.13 0.19 0.23 0.28 0.35 0.54 1.02

0.10 10 0.16 0.18 0.21 0.30 0.35 0.41 0.50 0.70 1.22

0.20 5 0.33 0.35 0.38 0.48 0.55 0.64 0.75 0.96 1.52

0.50 2 0.87 0.91 0.98 1.10 1.21 1.34 1.50 1.72 2.34
244

8-3.L00-1A KOWGAN RIVER AT LANGAR, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 1.18 1.28 1.36 1.71 1.04 1.38 1.65 2.37

0.10 10 1.51 1.65 1.75 2.08 1.32 1.74 2.07 3.08

0.20 5 1.99 2.19 2.31 2.60 1.79 2.33 2.76 4.23

0.50 2 3.16 3.47 3.64 3.82 3.37 4.23 4.97 7.74

June-July-August September-October-November

0.05 20 0 0.11 0.18 0.22 0.30 0.52 0.61 0.87

0.10 10 0.11 0.19 0.28 0.33 0.43 0.66 0.77 1.04

0.20 5 0.25 0.33 0.44 0.51 0.67 0.89 1.02 1.30

0.50 2 0.78 0.88 1.01 1.14 1.40 1.56 1.72 2.00
245

8-3.L00-1A KOWGAN RIVER AT LANGAR, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1962 April 25, 1962 22.3 1969 April 13, 1969 290

1963 May 7, 1963 32.4 1975 April 25, 1975 240

1964 April 23, 1964 198 1964 April 23, 1964 198

1965 April 22, 1965 47.1 1968 May 19, 1968 148

1966 April 26, 1966 67.0 1976 April 25, 1976 103

1967 April 27, 1967 78.4 1972 March 26, 1972 86.0

1968 May 19, 1968 148 1967 April 27, 1967 78.4

1969 April 13, 1969 290 1977 May 26, 1977 71.1

1970 November 6, 1969 43.4 1971 April 13, 1971 70.4

1971 April 13, 1971 70.4 1966 April 26, 1966 67.0

1972 March 26, 1972 86.0 1973 March 25, 1973 60.5

1973 March 25, 1973 60.5 1965 April 22, 1965 47.1

1974 April 3, 1974 39.5 1978 November 18, 1977 46.6

1975 April 25, 1975 240 1970 November 6, 1969 43.4

1976 April 25, 1976 103 1974 April 3, 1974 39.5

1977 May 26, 1977 71.1 1963 May 7, 1963 32.4

1978 November 18, 1977 46.6 1962 April 25, 1962 22.3
246

8-3.L00-1A KOWGAN RIVER AT LANGAR, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[--, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1962 -- -- -- 4.49 5.65 7.13 10.4 5.85 1.12 0.87 0.93 1.89 --

1963 2.69 3.59 3.80 3.72 3.83 4.27 5.51 12.2 0.77 0.19 0.29 0.96 3.49

1964 1.41 3.21 2.25 1.81 4.19 15.2 36.2 13.0 2.62 1.34 1.28 1.57 6.98

1965 2.01 2.99 3.07 4.78 9.24 17.9 26.3 25.3 6.51 1.91 1.63 2.93 8.70

1966 3.97 4.40 4.89 4.90 5.47 5.64 12.6 5.51 1.08 0.41 0.42 0.86 4.16

1967 1.97 2.85 3.10 2.11 3.82 7.69 26.9 26.6 6.65 2.00 1.46 1.86 7.26

1968 3.46 4.51 4.95 5.02 4.90 11.2 8.12 11.2 4.68 1.18 1.51 2.38 5.26

1969 3.42 5.40 8.42 7.38 11.1 43.3 66.0 30.0 7.37 4.01 3.78 4.79 16.2

1970 5.47 8.72 5.70 6.46 6.83 11.1 11.0 3.76 1.36 0.95 1.00 1.80 5.34

1971 2.66 3.63 3.89 3.61 4.11 5.80 9.07 1.86 0.85 0.60 0.60 0.98 3.12

1972 1.56 2.09 2.83 2.13 2.99 22.5 37.0 18.0 6.87 2.74 1.74 2.23 8.55

1973 2.54 3.18 3.38 3.86 6.78 13.9 16.8 6.90 2.26 1.11 1.22 1.76 5.29

1974 1.97 2.63 2.78 3.19 3.83 15.4 24.4 8.74 2.41 3.44 4.50 2.99 6.36

1975 2.02 3.00 3.36 4.35 6.34 16.1 57.8 42.2 11.0 5.10 3.72 4.33 13.3

1976 5.18 6.14 6.85 6.26 7.15 13.8 54.1 40.9 8.85 4.39 3.85 4.57 13.5

1977 5.68 8.68 6.79 6.75 7.58 9.84 12.4 4.66 1.18 0.62 1.19 1.88 5.58

1978 2.42 5.38 4.60 4.51 7.22 11.7 12.8 5.21 0.89 0.50 0.49 1.17 4.72
247

8-3.L00-6A KOWGAN RIVER AT TANGI AZU

(U.S. Geological Survey identification number: 340800064120000)

LOCATION: Lat 34o08'N., long 64o12'E.

DRAINAGE AREA: 2,030 km2

.

ELEVATION: 2,200 meters above mean sea level.

PERIOD OF RECORD: October 16, 1962 to September 30, 1978.

GAGE: Water-stage recorder.

0

0.5

1

1.5

2

2.5

3

3.5

4

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
248

8-3.L00-6A KOWGAN RIVER AT TANGI AZU, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 1.62 1966 0.44 1971 0.79 0.36 0.46 3.54

November 1.49 1966 0.38 1970 0.84 0.36 0.43 3.76

December 1.60 1970 0.32 1971 0.86 0.34 0.39 3.86

January 1.47 1965 0.24 1971 0.81 0.35 0.43 3.64

February 2.29 1965 0.29 1971 0.90 0.54 0.60 4.04

March 8.36 1969 0.61 1967 3.15 2.29 0.73 14.2

April 17.7 1975 1.03 1971 6.99 5.12 0.73 31.5

May 9.84 1975 0.38 1971 4.54 3.18 0.70 20.4

June 3.78 1975 0.36 1971 1.39 1.08 0.78 6.24

July 1.38 1975 0.34 1978 0.64 0.29 0.44 2.88

August 1.22 1975 0.30 1978 0.62 0.25 0.41 2.78

September 1.58 1975 0.38 1978 0.71 0.35 0.50 3.20

Annual 3.43 1965 0.52 1971 1.90 0.96 0.50 100
249

8-3.L00-6A KOWGAN RIVER AT TANGI AZU, Continued 

Monthly and annual flow duration, in cubic meters per second 

[ng, not given] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 0.45 0.37 0.34 0.25 0.27 0.46 0.66 0.39 0.38 0.34 0.33 0.39 0.36

90 0.50 0.47 0.47 0.34 0.33 0.61 1.34 0.88 0.41 0.37 0.38 0.41 0.41

85 0.51 0.50 0.53 0.42 0.36 0.84 1.53 1.16 0.48 0.38 0.38 0.45 0.46

80 0.52 0.53 0.61 0.49 0.39 1.00 1.80 1.45 0.52 0.39 0.42 0.46 0.52

75 0.53 0.61 0.62 0.53 0.45 1.13 1.94 1.70 0.55 0.45 0.45 0.51 0.56

70 0.57 0.64 0.63 0.57 0.49 1.30 2.30 2.01 0.57 0.46 0.46 0.53 0.61

65 0.60 0.67 0.64 0.60 0.54 1.45 3.24 2.36 0.61 0.47 0.47 0.54 0.65

60 0.61 0.68 0.68 0.62 0.64 1.59 4.12 2.76 0.65 0.47 0.49 0.55 0.69

55 0.62 0.70 0.70 0.68 0.74 1.74 4.75 3.12 0.75 0.52 0.52 0.56 0.73

50 0.63 0.72 0.73 0.73 0.82 1.84 5.49 3.64 0.86 0.54 0.53 0.62 0.81

45 0.64 0.73 0.78 0.78 0.88 1.94 6.92 4.10 0.95 0.56 0.60 0.63 0.92

40 0.69 0.75 0.85 0.84 0.94 2.09 7.65 4.77 1.03 0.68 0.62 0.64 1.04

35 0.71 0.89 0.97 0.90 1.03 2.45 8.73 5.43 1.08 0.73 0.70 0.71 1.18

30 0.84 0.97 1.07 1.01 1.16 3.07 9.62 6.37 1.35 0.76 0.71 0.76 1.35

25 0.93 1.19 1.16 1.12 1.26 4.15 10.4 7.02 1.69 0.78 0.76 0.77 1.53

20 1.23 1.29 1.22 1.19 1.33 5.05 11.4 7.66 2.09 0.87 0.80 0.78 1.82

15 1.31 1.37 1.25 1.25 1.42 6.66 12.7 8.48 2.44 0.96 0.85 1.06 2.76

10 1.41 1.45 1.41 1.34 1.57 8.43 14.5 9.30 3.19 1.00 0.99 1.48 5.09

5 ng 1.55 1.58 1.53 2.14 10.1 19.4 11.4 5.03 1.25 1.20 ng 8.74
250

8-3.L00-6A KOWGAN RIVER AT TANGI AZU, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 ng 1.30 1.03 0.80 0.72

0.95 1.05 ng 2.51 2.05 1.68 1.52

0.90 1.11 4.40 3.48 2.90 2.42 2.19

0.80 1.25 6.70 5.04 4.30 3.69 3.32

0.50 2 13.2 9.56 8.52 7.61 6.78

0.20 5 22.2 16.6 15.5 14.2 12.6

0.10 10 27.6 21.5 20.5 19.0 16.7

0.04 25 33.3 27.6 27.0 25.2 22.0

0.02 50 37.0 32.1 31.9 29.8 25.9

0.01 100 40.1 1

36.4 36.7 34.3 29.8

0.005 200 42.7 1

40.6 41.5 38.8 33.6

0.002 500 45.7 ng ng ng ng

1

Data does not fit log-Pearson Type III curve, use with caution.

8-3.L00-6A KOWGAN RIVER AT TANGI AZU, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 0.04 0.07 0.10 0.19 0.25 0.28 0.31 0.33 0.38

0.10 10 0.06 0.11 0.15 0.23 0.28 0.32 0.34 0.37 0.42

0.20 5 0.11 0.17 0.22 0.28 0.33 0.37 0.39 0.42 0.48

0.50 2 0.29 0.34 0.41 0.42 0.46 0.51 0.54 0.57 0.65
251

8-3.L00-6A KOWGAN RIVER AT TANGI AZU, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 0.06 0.11 0.20 0.25 0.32 0.34 0.37 0.47

0.10 10 0.10 0.17 0.25 0.31 0.39 0.43 0.48 0.66

0.20 5 0.18 0.28 0.34 0.39 0.50 0.57 0.67 0.99

0.50 2 0.44 0.55 0.57 0.61 0.81 0.97 1.24 2.06

June-July-August September-October-November

0.05 20 0.29 0.29 0.29 0.29 0.10 0.29 0.32 0.36

0.10 10 0.31 0.32 0.32 0.33 0.17 0.32 0.35 0.39

0.20 5 0.34 0.35 0.37 0.38 0.30 0.38 0.40 0.44

0.50 2 0.44 0.47 0.49 0.52 0.62 0.54 0.56 0.59
252

8-3.L00-6A KOWGAN RIVER AT TANGI AZU, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1963 May 11, 1963 5.36 1968 June 8, 1968 33.0

1964 April 23, 1964 19.3 1976 April 24, 1976 27.0

1965 April 22, 1965 15.7 1969 April 16, 1969 24.0

1966 April 25, 1966 8.86 1975 April 8, 1975 24.0

1967 April 27, 1967 14.8 1964 April 23, 1964 19.3

1968 June 8, 1968 33.0 1965 April 22, 1965 15.7

1969 April 16, 1969 24.0 1967 April 27, 1967 14.8

1970 April 26, 1970 1.90 1972 March 23, 1972 13.0

1971 April 8, 1971 10.9 1973 April 14, 1973 12.9

1972 March 23, 1972 13.0 1974 March 25, 1974 11.4

1973 April 14, 1973 12.9 1971 April 8, 1971 10.9

1974 March 25, 1974 11.4 1966 April 25, 1966 8.86

1975 April 8, 1975 24.0 1977 April 11, 1977 6.28

1976 April 24, 1976 27.0 1963 May 11, 1963 5.36

1977 April 11, 1977 6.28 1978 April 17, 1978 5.32

1978 April 17, 1978 5.32 1970 April 26, 1970 1.90
253

8-3.L00-6A KOWGAN RIVER AT TANGI AZU, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[--, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1963 -- 1.00 0.85 0.76 0.82 1.83 1.66 2.98 0.73 0.73 0.70 0.73 --

1964 0.53 0.61 0.65 0.61 0.87 5.61 11.6 6.34 1.61 0.94 0.75 0.76 2.57

1965 0.80 0.89 1.07 1.47 2.29 7.30 11.9 9.68 2.26 0.93 1.05 1.47 3.43

1966 1.62 1.49 1.14 1.12 1.15 1.53 2.76 2.13 0.58 0.54 0.51 0.53 1.26

1967 0.60 0.65 0.55 0.39 0.35 0.61 4.85 5.47 1.37 0.72 0.63 0.73 1.41

1968 1.01 1.30 1.17 0.88 0.73 1.66 2.17 2.40 1.74 0.38 0.41 0.48 1.20

1969 0.61 0.70 0.65 0.74 1.04 8.36 11.3 6.92 1.59 0.86 0.75 0.54 2.85

1970 0.59 0.38 1.60 1.20 1.29 1.28 1.09 0.88 0.47 0.36 0.37 0.43 0.83

1971 0.44 0.41 0.32 0.24 0.29 1.22 1.03 0.38 0.36 0.41 0.50 0.58 0.52

1972 0.66 0.67 0.64 0.69 0.48 3.80 7.67 5.29 1.33 0.45 0.56 0.65 1.91

1973 0.65 0.70 0.67 0.68 0.58 4.43 9.22 3.74 0.70 0.47 0.40 0.42 1.89

1974 0.54 0.72 0.90 0.66 0.35 3.75 6.79 2.83 0.56 0.46 0.48 0.60 1.56

1975 0.61 0.51 0.53 0.48 0.51 2.02 17.7 9.84 3.78 1.38 1.22 1.58 3.34

1976 1.36 1.38 1.27 1.34 1.40 2.00 13.9 9.75 3.74 0.80 0.79 0.98 3.22

1977 1.29 1.32 1.09 1.12 1.55 3.57 4.32 1.80 0.79 0.49 0.47 0.50 1.52

1978 0.52 0.65 0.63 0.55 0.65 1.42 3.80 2.23 0.56 0.34 0.30 0.38 1.00
254

8-11.L00-1A LAL RIVER AT SHINYA

(U.S. Geological Survey identification number: 343000065400000)

LOCATION: Lat 34o30'N., long 65o40'E.

DRAINAGE AREA: 1,685 km2

.

ELEVATION: 2,420 meters above mean sea level.

PERIOD OF RECORD: October 27, 1976 to September 30, 1978.

GAGE: Water-stage recorder.

0

1

2

3

4

5

6

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
255

8-11.L00-1A LAL RIVER AT SHINYA, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second; ng, not given] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 0.95 1978 0.95 1978 0.95 ng ng 1.73

November 1.06 1978 0.95 1977 1.01 0.07 0.07 1.84

December 1.32 1978 0.81 1977 1.07 0.36 0.34 1.95

January 1.66 1978 0.80 1977 1.23 0.61 0.50 2.24

February 1.26 1978 0.76 1977 1.01 0.36 0.35 1.84

March 3.53 1977 2.19 1978 2.86 0.95 0.33 5.22

April 22.7 1978 11.6 1977 17.2 7.85 0.46 31.3

May 25.6 1978 17.5 1977 21.6 5.73 0.27 39.3

June 5.87 1977 4.19 1978 5.03 1.19 0.24 9.17

July 1.38 1977 0.38 1978 0.88 0.71 0.81 1.60

August 2.29 1977 0.08 1978 1.18 1.57 1.32 2.16

September 1.82 1977 0.08 1978 0.95 1.23 1.30 1.73

Annual 5.13 1978 5.13 1978 5.13 ng ng 100
256

8-11.L00-1A LAL RIVER AT SHINYA, Continued 

Monthly and annual flow duration, in cubic meters per second 

[ng, not given] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 0.70 0.69 0.68 0.76 0.70 0.87 5.76 13.9 1.12 0.18 0.05 0.05 0.06

90 0.71 0.70 0.69 0.76 0.71 1.01 5.95 14.2 1.32 0.21 0.06 0.06 0.08

85 0.75 0.75 0.74 0.77 0.71 1.04 7.55 14.8 1.55 0.22 0.06 0.06 0.11

80 0.76 0.76 0.76 0.79 0.75 1.07 9.46 15.1 1.69 0.31 0.06 0.08 0.31

75 0.76 0.86 0.86 0.80 0.75 1.09 11.2 15.9 1.77 0.33 0.07 0.08 0.64

70 0.76 0.87 0.87 0.81 0.76 1.47 12.1 16.2 1.91 0.42 0.08 0.09 0.77

65 0.77 0.87 0.89 0.83 0.76 1.55 12.5 16.8 2.26 0.45 0.09 0.09 0.86

60 0.87 0.87 0.89 0.84 0.80 1.97 12.8 17.9 2.55 0.56 0.11 0.10 1.13

55 0.88 0.88 0.90 0.85 0.89 2.44 13.2 18.7 3.02 0.69 0.13 0.11 1.22

50 0.88 0.88 1.09 0.86 0.91 2.55 14.3 19.3 3.56 0.78 0.15 0.12 1.30

45 0.88 0.89 1.10 1.55 1.09 2.79 14.7 20.4 4.56 0.88 1.86 1.53 1.39

40 0.89 1.11 1.23 1.58 1.10 3.56 15.2 21.1 5.39 1.09 1.94 1.62 1.48

35 1.09 1.12 1.24 1.59 1.10 3.92 17.6 22.5 6.19 1.16 2.06 1.69 1.56

30 1.10 1.22 1.34 1.60 1.11 4.63 24.7 23.4 6.91 1.35 2.22 1.75 1.71

25 1.21 1.22 1.35 1.61 ng ng 26.1 26.1 7.50 1.46 2.42 1.80 2.52

20 1.22 1.32 1.36 1.67 ng ng 27.0 29.4 8.50 1.53 ng 1.86 4.58

15 1.22 1.33 ng ng ng ng 29.2 32.2 9.24 1.67 ng ng 11.4

10 1.23 1.34 ng ng ng ng 31.8 33.3 10.4 ng ng ng 23.4

5 ng 1.35 ng ng ng ng 33.7 35.9 12.3 ng ng ng 30.00
257

8-11.L00-1A LAL RIVER AT SHINYA, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 ng ng ng ng ng

0.95 1.05 ng ng ng ng ng

0.90 1.11 ng ng ng ng ng

0.80 1.25 ng ng ng ng ng

0.50 2 ng ng ng ng ng

0.20 5 ng ng ng ng ng

0.10 10 ng ng ng ng ng

0.04 25 ng ng ng ng ng

0.02 50 ng ng ng ng ng

0.01 100 ng ng ng ng ng

0.005 200 ng ng ng ng ng

0.002 500 ng ng ng ng ng

8-11.L00-1A LAL RIVER AT SHINYA, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second; ng, not given] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 ng ng ng ng ng ng ng ng ng

0.10 10 ng ng ng ng ng ng ng ng ng

0.20 5 ng ng ng ng ng ng ng ng ng

0.50 2 ng ng ng ng ng ng ng ng ng
258

8-11.L00-1A LAL RIVER AT SHINYA, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second; ng, not given] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 ng ng ng ng ng ng ng ng

0.10 10 ng ng ng ng ng ng ng ng

0.20 5 ng ng ng ng ng ng ng ng

0.50 2 ng ng ng ng ng ng ng ng

June-July-August September-October-November

0.05 20 ng ng ng ng ng ng ng ng

0.10 10 ng ng ng ng ng ng ng ng

0.20 5 ng ng ng ng ng ng ng ng

0.50 2 ng ng ng ng ng ng ng ng

8-11.L00-1A LAL RIVER AT SHINYA, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1977 May 22, 1977 23.3 1978 May 5, 1978 38.5

1978 May 5, 1978 38.5 1977 May 22, 1977 23.3
259

8-11.L00-1A LAL RIVER AT SHINYA, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[--, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1977 -- 0.95 0.81 0.80 0.76 3.53 11.6 17.5 5.87 1.38 2.29 1.82 --

1978 0.95 1.06 1.32 1.66 1.26 2.19 22.7 25.6 4.19 0.38 0.08 0.08 5.13
260

9-0.000-1M MURGHAB RIVER AT BALA MURGHAB

(U.S. Geological Survey identification number: 353500063190000)

LOCATION: Lat 35o35'N., long 63o19'E.

DRAINAGE AREA: 20,525 km2

.

ELEVATION: 468 meters above mean sea level.

PERIOD OF RECORD: April 1, 1969 to September 30, 1978.

GAGE: Water-stage recorder. Staff gage prior to 1970 water year.

0

10

20

30

40

50

60

70

80

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
261

9-0.000-1M MURGHAB RIVER AT BALA MURGHAB, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 50.0 1977 29.2 1972 38.3 8.21 0.21 5.74

November 52.5 1970 29.6 1972 38.1 8.41 0.22 5.71

December 44.5 1970 27.1 1972 36.0 6.78 0.19 5.40

January 41.7 1970 26.4 1972 33.3 5.56 0.17 4.99

February 44.8 1976 25.4 1972 33.9 5.91 0.17 5.09

March 58.9 1973 33.3 1971 48.4 8.04 0.17 7.26

April 281 1969 51.5 1971 113 67.9 0.60 17.0

May 228 1969 46.4 1971 116 63.5 0.55 17.4

June 167 1969 34.6 1971 80 42.5 0.53 12.0

July 93.5 1969 30.0 1971 50.7 21.3 0.42 7.61

August 64.3 1969 26.8 1971 40.3 12.9 0.32 6.05

September 54.1 1969 27.9 1971 38.5 9.4 0.24 5.77

Annual 74.2 1976 33.4 1971 51.4 13.3 0.26 100
262

9-0.000-1M MURGHAB RIVER AT BALA MURGHAB, Continued 

Monthly and annual flow duration, in cubic meters per second 

[ng, not given] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 29.4 29.3 27.0 26.5 25.2 30.2 46.6 46.6 34.6 28.4 27.1 27.9 28.0

90 29.7 29.7 28.7 26.7 26.6 31.3 53.9 49.4 36.5 29.9 27.7 29.4 29.3

85 30.8 30.0 29.3 27.6 28.2 35.1 57.4 51.0 40.1 31.3 28.3 30.5 30.6

80 31.1 30.2 29.7 28.2 28.6 38.0 61.8 60.5 44.1 33.8 29.1 30.9 31.6

75 31.9 31.3 30.5 28.4 29.0 38.6 67.0 65.2 46.7 35.0 31.9 32.0 32.5

70 32.9 31.6 31.0 28.6 29.4 39.2 72.7 70.1 49.7 36.6 33.1 32.5 33.5

65 33.9 32.6 31.4 29.4 29.9 39.8 76.8 73.0 52.7 37.5 33.9 32.9 34.5

60 34.2 34.0 31.9 30.4 30.5 40.4 79.7 85.2 56.1 38.7 34.8 34.2 36.1

55 34.5 34.5 32.5 31.4 31.9 41.6 83.2 93.7 59.7 40.8 35.3 34.7 37.7

50 34.9 35.1 33.7 32.4 33.3 42.9 87.7 97.9 65.9 42.9 35.8 35.3 39.8

45 35.8 36.3 34.5 33.0 33.8 46.1 93.0 104 71.6 44.6 36.2 35.8 41.8

40 36.1 37.9 37.3 34.8 34.2 47.2 98.5 111 80.2 46.7 37.1 36.2 44.3

35 37.3 40.8 39.4 35.2 36.2 48.3 104 124 87.4 51.0 38.2 36.6 46.9

30 46.4 43.6 41.8 36.7 37.1 51.8 115 147 94.3 58.6 49.1 47.8 49.9

25 47.1 45.0 43.3 38.2 37.5 53.8 125 176 105 64.7 51.8 48.9 54.1

20 48.5 45.6 43.8 39.3 37.8 56.2 138 184 118 69.8 54.9 50.4 61.2

15 49.2 47.6 44.3 40.9 40.0 60.3 172 193 133 76.6 57.4 51.2 73.7

10 ng 49.4 45.1 41.4 43.9 68.1 217 202 143 85.3 58.6 51.8 92.2

5 ng 53.2 46 ng 46.5 83.2 258 219 171 94.6 65.1 53.1 121
263

9-0.000-1M MURGHAB RIVER AT BALA MURGHAB, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 40.7 145.7 46.1 41.8 37.5

0.95 1.05 64.9 59.0 56.9 53.1 48.9

0.90 1.11 83.5 68.4 64.6 60.9 56.8

0.80 1.25 114 82.3 76.3 72.6 68.5

0.50 2 208 121 110 105 101

0.20 5 387 184 167 158 152

0.10 10 539 234 214 199 192

0.04 25 769 304 283 258 247

0.02 50 971 363 343 307 293

0.01 100 1200 428 411 361 342

0.005 200 1460 499 488 421 396

0.002 500 1850 ng ng ng ng

1

Data does not fit log-Pearson Type III curve, use with caution.

9-0.000-1M MURGHAB RIVER AT BALA MURGHAB, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 22.6 23.0 23.6 23.9 24.7 25.2 25.5 26.1 26.6

0.10 10 23.9 24.2 24.7 25.0 25.7 26.3 26.7 27.3 28.0

0.20 5 25.6 25.8 26.2 26.4 27.1 27.8 28.4 29.0 30.0

0.50 2 29.4 29.5 29.7 29.9 30.5 31.4 32.2 33.0 34.6
264

9-0.000-1M MURGHAB RIVER AT BALA MURGHAB, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 22.6 23.6 23.9 24.8 24.9 27.3 30.5 34.1

0.10 10 24.2 25.0 25.3 26.1 27.1 29.2 32.0 37.4

0.20 5 26.2 26.9 27.1 27.9 29.9 31.7 34.1 41.4

0.50 2 30.4 30.8 31.0 31.6 35.7 37.1 38.6 48.5

June-July-August September-October-November

0.05 20 24.3 24.4 24.6 25.0 25.1 25.2 25.5 26.1

0.10 10 26.0 26.2 26.4 26.9 26.6 26.7 27.0 27.6

0.20 5 28.5 28.7 29.1 29.8 28.7 28.9 29.1 29.8

0.50 2 35.2 35.4 36.0 37.3 33.7 34.0 34.3 35.1

9-0.000-1M MURGHAB RIVER AT BALA MURGHAB, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1969 April 15, 1969 765 1969 April 15, 1969 765

1970 March 25, 1970 101 1975 May 9, 1975 359

1971 April 18, 1971 69.8 1972 April 26, 1972 330

1972 April 26, 1972 330 1977 April 9, 1977 278

1973 March 26, 1973 250 1976 April 24, 1976 270

1974 April 13, 1974 103 1973 March 26, 1973 250

1975 May 9, 1975 359 1978 December 25, 1977 139

1976 April 24, 1976 270 1974 April 13, 1974 103

1977 April 9, 1977 278 1970 March 25, 1970 101

1978 December 25, 1977 139 1971 April 18, 1971 69.8
265

9-0.000-1M MURGHAB RIVER AT BALA MURGHAB, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[--, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1969 -- -- -- -- -- -- 281 228 167 93.5 64.3 54.1 --

1970 49.7 52.5 44.5 41.7 38.0 44.9 71.4 69.9 49.5 38.2 33.1 32.0 47.2

1971 32.3 30.4 29.9 29.0 28.9 33.3 51.5 46.4 34.6 30.0 26.8 27.9 33.4

1972 29.2 29.6 27.1 26.4 25.4 52.5 96.0 118 80.8 46.6 36.7 34.3 50.3

1973 34.6 33.3 31.9 29.6 33.0 58.9 106 107 73.5 46.7 37.6 36.2 52.4

1974 36.1 34.9 33.5 32.3 30.6 43.1 81.2 70.2 49.6 36.3 32.8 32.5 42.8

1975 31.2 30.6 30.4 27.7 30.4 51.2 160 191 120 72.1 53.9 49.1 70.8

1976 46.7 44.6 42.0 39.9 44.8 56.7 138 182 118 72.1 55.6 51.3 74.2

1977 50.0 47.8 44.2 37.3 36.4 42.9 57.6 50.9 41.3 30.4 27.9 31.0 41.5

1978 34.5 38.8 40.6 35.6 37.9 52.2 90.1 96.9 65.9 41.4 34.6 36.2 50.4
266

9-0.000-5M MURGHAB RIVER AT QALA-I-NIAZKHAN

(U.S. Geological Survey identification number: 350200064010000)

LOCATION: Lat 35o02'N., long 64o01'E.

DRAINAGE AREA: 13,805 km2

.

ELEVATION: 800 meters above mean sea level.

PERIOD OF RECORD: January 8, 1966 to September 30, 1978.

GAGE: Water-stage recorder.

0

10

20

30

40

50

60

70

80

90

100

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
267

9-0.000-5M MURGHAB RIVER AT QALA-I-NIAZKHAN, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 44.3 1976 19.9 1972 32.7 7.17 0.22 5.94

November 43.2 1970 22.3 1972 31.5 6.31 0.20 5.73

December 37.0 1976 22.2 1972 29.5 5.23 0.18 5.36

January 35.5 1976 22.4 1971 28.7 4.13 0.14 5.21

February 39.3 1976 20.3 1972 28.4 4.97 0.18 5.16

March 113 1969 26.6 1971 41.2 22.3 0.54 7.49

April 214 1969 42.0 1966 80.3 46.4 0.58 14.6

May 202 1969 36.8 1971 92.0 50.6 0.55 16.7

June 146 1969 28.5 1971 67.5 34.1 0.50 12.3

July 89.0 1969 24.9 1971 45.9 17.4 0.38 8.35

August 59.2 1969 22.9 1971 37.6 10.6 0.28 6.84

September 48.2 1975 21.1 1971 34.7 8.31 0.24 6.31

Annual 87.3 1969 26.9 1971 46.8 16.0 0.34 100
268

9-0.000-5M MURGHAB RIVER AT QALA-I-NIAZKHAN, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 20.3 22.5 22.1 22.1 20.4 23.5 33.4 37.5 28.3 25.5 23.2 21.5 22.5

90 25.0 23.5 22.8 22.5 22.2 25.9 37.3 42.5 35.9 29.9 28.2 26.8 24.5

85 25.6 24.3 23.5 24.0 22.9 27.5 41.4 46.9 38.0 31.9 28.9 27.6 26.2

80 26.2 25.0 24.1 24.4 23.3 28.3 44.2 51.3 39.9 33.2 29.4 28.3 27.7

75 27.3 26.0 24.9 25.4 25.6 28.9 46.2 55.5 42.1 34.0 29.9 29.8 29.0

70 29.2 28.1 26.3 26.4 26.3 29.6 48.3 60.2 44.9 35.1 30.4 30.1 30.0

65 29.6 29.3 27.0 27.0 26.8 30.8 51.0 63.3 47.6 36.5 31.0 30.4 31.0

60 30.6 30.0 27.5 27.6 27.2 31.9 55.0 68.3 49.6 38.0 32.3 30.8 32.1

55 31.1 30.6 28.2 28.4 27.9 33.0 57.6 73.9 52.1 39.1 34.4 31.6 33.7

50 31.8 31.3 28.6 28.9 28.7 34.1 62.0 77.8 56.1 41.3 36.1 34.2 35.2

45 32.9 31.7 29.2 29.3 29.0 35.1 68.0 81.7 60.3 42.9 36.6 34.7 36.7

40 33.7 32.0 32.0 30.0 29.4 36.2 73.4 87.0 63.3 44.5 37.3 35.5 38.6

35 34.9 32.3 32.4 30.3 29.8 37.1 79.3 90.7 68.8 46.6 38.0 36.2 40.9

30 35.5 33.8 32.8 30.6 30.4 38.0 89.1 95.9 77.9 48.7 39.5 36.7 44.5

25 37.5 35.2 33.7 31.1 30.8 39.4 96.0 109 86.8 54.6 40.7 37.5 48.7

20 40.8 36.5 35.0 31.8 31.4 41.2 101 140 93.9 58.4 49.2 45.6 56.4

15 41.6 38.2 36.2 32.8 32.7 45.6 117 155 109 63.8 51.6 46.4 66.7

10 43.1 40.7 36.9 33.8 34.6 60.0 157 173 121 72.2 54.6 47.6 84.6

5 44.7 42.3 37.3 35.3 38.0 108 180 193 142 81.6 56.8 49.0 117
269

9-0.000-5M MURGHAB RIVER AT QALA-I-NIAZKHAN, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, statistic not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 31.7 42.3 39.8 37.9 33.5

0.95 1.05 48.8 52.1 50.0 47.2 43.2

0.90 1.11 61.4 59.4 57.3 53.9 50.0

0.80 1.25 80.9 70.7 68.5 64.2 60.3

0.50 2 137 105 101 94.2 88.8

0.20 5 231 169 158 148 136

0.10 10 304 224 205 192 173

0.04 25 406 311 277 259 227

0.02 50 489 390 340 319 272

0.01 100 578 483 411 388 321

0.005 200 673 593 493 467 376

0.002 500 810 ng ng ng ng

9-0.000-5M MURGHAB RIVER AT QALA-I-NIAZKHAN, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 19.3 19.5 19.6 19.9 20.3 20.8 21.2 21.4 21.9

0.10 10 20.7 20.8 21.0 21.3 21.7 22.3 22.6 23.0 23.6

0.20 5 22.4 22.5 22.8 23.1 23.5 24.1 24.5 24.9 25.8

0.50 2 25.7 25.9 26.3 26.7 27.1 27.8 28.3 28.8 30.2
270

9-0.000-5M MURGHAB RIVER AT QALA-I-NIAZKHAN, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 19.8 20.1 20.3 20.6 20.9 21.7 24.7 28.2

0.10 10 21.0 21.3 21.6 22.0 22.4 22.7 25.0 28.5

0.20 5 22.6 22.9 23.3 23.7 24.3 24.2 25.7 29.1

0.50 2 25.7 26.3 26.7 27.2 28.0 28.5 29.0 33.2

June-July-August September-October-November

0.05 20 23.3 23.3 23.4 23.9 20.1 20.2 20.4 20.9

0.10 10 25.2 25.2 25.4 25.9 22.0 22.3 22.5 23.0

0.20 5 27.7 27.9 28.1 28.7 24.3 24.8 25.0 25.6

0.50 2 33.9 34.3 34.7 35.6 29.0 29.7 30.1 30.8

9-0.000-5M MURGHAB RIVER AT QALA-I-NIAZKHAN, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1966 April 27, 1966 57.1 1969 April 11, 1969 381

1967 April 24, 1967 295 1967 April 24, 1967 295

1968 April 25, 1968 170 1975 May 8, 1975 229

1969 April 11, 1969 381 1973 March 25, 1973 215

1970 April 27, 1970 74.0 1976 April 25, 1976 184

1971 April 16, 1971 56.6 1968 April 25, 1968 170

1972 March 19, 1972 150 1972 March 19, 1972 150

1973 March 25, 1973 215 1977 April 9, 1977 131

1974 May 3, 1974 74.0 1978 May 6, 1978 96.7

1975 May 8, 1975 229 1970 April 27, 1970 74.0

1976 April 25, 1976 184 1974 May 3, 1974 74.0

1977 April 9, 1977 131 1966 April 27, 1966 57.1

1978 May 6, 1978 96.7 1971 April 16, 1971 56.6
271

9-0.000-5M MURGHAB RIVER AT QALA-I-NIAZKHAN, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[--, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1966 -- -- -- -- 29.8 29.4 42.0 51.0 40.4 33.7 31.1 30.8 --

1967 31.0 29.0 27.4 28.7 26.6 28.4 62.2 72.7 55.2 45.2 39.3 36.1 40.2

1968 34.0 31.7 26.9 26.8 25.8 34.7 55.4 85.6 75.7 44.4 36.7 36.3 42.8

1969 35.5 34.0 36.3 34.8 33.4 113 214 202 146 89.0 59.2 47.3 87.3

1970 40.5 43.2 34.9 31.1 28.1 34.4 63.2 62.3 43.7 35.1 29.2 27.3 39.4

1971 25.6 24.8 23.7 22.4 22.5 26.6 42.6 36.8 28.5 24.9 22.9 21.1 26.9

1972 19.9 22.3 22.2 23.0 20.3 41.1 79.1 98.5 78.8 42.7 32.6 30.3 42.6

1973 31.3 31.7 32.1 30.0 31.0 48.1 91.6 86.9 57.6 45.4 38.7 34.6 46.6

1974 32.4 29.9 27.3 27.6 29.8 37.4 55.5 58.4 45.4 35.9 29.6 27.9 36.4

1975 26.2 24.3 23.0 24.6 23.2 31.7 123 172 113 64.0 50.9 48.2 60.4

1976 44.3 37.9 37.0 35.5 39.3 39.1 94.8 143 98.5 64.7 52.5 46.5 61.1

1977 42.1 39.3 33.6 30.3 30.5 35.5 49.6 44.6 38.3 30.3 29.2 29.9 36.1

1978 29.4 30.0 29.5 29.2 28.3 36.3 71.0 82.0 56.4 41.7 37.0 34.7 42.2
272

9-1.000-1A GULRAN RIVER AT CHAR TAKHTA

(U.S. Geological Survey identification number: 352300062020000)

LOCATION: Lat 35o23'N., long 62o02'E.

DRAINAGE AREA: 2,895 km2

.

ELEVATION: 568 meters above mean sea level.

PERIOD OF RECORD: June 20, 1977 to September 30, 1978.

GAGE: Water-stage recorder.

0

0.05

0.1

0.15

0.2

0.25

0.3

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
273

9-1.000-1A GULRAN RIVER AT CHAR TAKHTA, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second; ng, not given] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 0.13 1978 0.13 1978 0.12 ng ng 3.95

November 0.57 1978 0.57 1978 0.57 ng ng 18.0

December 0.53 1978 0.53 1978 0.53 ng ng 16.8

January 0.03 1978 0.03 1978 0.03 ng ng 0.98

February 0.37 1978 0.37 1978 0.37 ng ng 11.7

March 0.78 1978 0.78 1978 0.78 ng ng 24.8

April 0.48 1978 0.48 1978 0.48 ng ng 15.3

May 0.06 1978 0.06 1978 0.06 ng ng 1.99

June 0.05 1978 0.05 1978 0.05 ng ng 1.61

July 0.04 1978 0.04 1977 0.04 0 0.05 1.25

August 0.06 1977 0.04 1978 0.05 0.02 0.33 1.64

September 0.09 1977 0.04 1978 0.07 0.04 0.55 2.12

Annual 0.26 1978 0.26 1978 0.26 ng ng 100
274

9-1.000-1A GULRAN RIVER AT CHAR TAKHTA, Continued 

Monthly and annual flow duration, in cubic meters per second 

[ng, not given] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 0.11 0.20 0.09 0.03 0.03 0.50 0.11 0.04 ng 0.03 0.04 0.04 0.03

90 0.12 0.21 0.10 0.03 0.03 0.50 0.11 0.04 ng 0.04 0.04 0.04 0.04

85 0.12 0.25 0.10 0.03 0.03 0.51 0.11 0.04 ng ng 0.04 0.04 0.04

80 0.12 0.25 0.10 0.03 0.03 0.51 0.12 0.05 ng ng 0.04 0.04 0.04

75 0.12 0.25 0.10 0.03 0.03 0.51 0.12 0.05 ng ng 0.05 0.05 0.04

70 0.12 0.25 0.11 0.03 0.04 0.51 0.15 0.05 ng ng 0.05 0.05 0.05

65 0.12 0.26 0.11 0.03 0.04 0.52 0.19 0.05 ng ng 0.05 0.05 0.05

60 0.12 0.26 0.11 0.03 0.04 0.52 0.22 0.06 ng ng 0.05 0.05 0.05

55 0.13 0.26 0.11 0.03 0.04 0.6 0.31 0.06 ng ng 0.05 0.05 0.06

50 0.13 0.26 0.14 0.04 0.04 0.61 0.33 0.07 ng ng 0.05 0.07 0.07

45 0.13 0.31 0.14 0.04 0.05 0.71 0.42 0.07 ng ng ng 0.08 0.09

40 0.13 0.33 0.15 0.04 0.05 0.72 0.51 0.07 ng ng ng 0.09 0.11

35 0.13 0.41 0.15 0.04 0.06 0.81 0.58 ng ng ng ng 0.09 0.12

30 0.13 0.49 0.15 0.04 0.11 0.82 0.60 ng ng ng ng 0.10 0.15

25 ng 0.51 0.16 0.04 0.23 0.98 0.68 ng ng ng ng 0.10 0.20

20 ng 0.53 0.16 0.04 0.95 0.99 0.73 ng ng ng ng ng 0.31

15 ng 1.10 0.30 0.04 1.04 1.00 0.78 ng ng ng ng ng 0.54

10 ng 1.51 1.08 0.04 ng 1.01 1.13 ng ng ng ng ng 0.73

5 ng ng ng ng ng ng ng ng ng ng ng ng 1.11
275

9-1.000-1A GULRAN RIVER AT CHAR TAKHTA, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 ng ng ng ng ng

0.95 1.05 ng ng ng ng ng

0.90 1.11 ng ng ng ng ng

0.80 1.25 ng ng ng ng ng

0.50 2 ng ng ng ng ng

0.20 5 ng ng ng ng ng

0.10 10 ng ng ng ng ng

0.04 25 ng ng ng ng ng

0.02 50 ng ng ng ng ng

0.01 100 ng ng ng ng ng

0.005 200 ng ng ng ng ng

0.002 500 ng ng ng ng ng

9-1.000-1A GULRAN RIVER AT CHAR TAKHTA, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 ng ng ng ng ng ng ng ng ng

0.10 10 ng ng ng ng ng ng ng ng ng

0.20 5 ng ng ng ng ng ng ng ng ng

0.50 2 ng ng ng ng ng ng ng ng ng
276

9-1.000-1A GULRAN RIVER AT CHAR TAKHTA, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second; ng, not given] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 ng ng ng ng ng ng ng ng

0.10 10 ng ng ng ng ng ng ng ng

0.20 5 ng ng ng ng ng ng ng ng

0.50 2 ng ng ng ng ng ng ng ng

June-July-August September-October-November

0.05 20 ng ng ng ng ng ng ng ng

0.10 10 ng ng ng ng ng ng ng ng

0.20 5 ng ng ng ng ng ng ng ng

0.50 2 ng ng ng ng ng ng ng ng

9-1.000-1A GULRAN RIVER AT CHAR TAKHTA, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1978 November 18, 1977 23.4 1978 November 18, 1977 23.4
277

9-1.000-1A GULRAN RIVER AT CHAR TAKHTA, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[ --, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1977 -- -- -- -- -- -- -- -- -- 0.04 0.06 0.09 --

1978 0.13 0.57 0.53 0.03 0.37 0.78 0.48 0.06 0.05 0.04 0.04 0.04 0.26
278

9-2.000-1A KUSHK RIVER AT CHIL DUKHTARAN

(U.S. Geological Survey identification number: 351300062170000)

LOCATION: Lat 35o13'N., long 62o17'E.

DRAINAGE AREA: 2,240 km2

.

ELEVATION: 768 meters above mean sea level.

PERIOD OF RECORD: July 6, 1970 to March 29, 1975 and June 14, 1977 to September 30, 1978.

GAGE: Water-stage recorder.

0

0.5

1

1.5

2

2.5

3

3.5

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
279

9-2.000-1A KUSHK RIVER AT CHIL DUKHTARAN, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 0.35 1973 0.09 1974 0.18 0.10 0.55 0.77

November 1.07 1972 0.17 1974 0.58 0.40 0.69 2.48

December 1.85 1978 0.57 1972 1.02 0.52 0.52 4.37

January 2.03 1974 0.65 1971 1.41 0.48 0.34 6.08

February 3.68 1975 1.57 1978 2.70 0.96 0.35 11.6

March 10.1 1972 1.11 1971 7.06 3.60 0.51 30.3

April 13.6 1974 2.31 1971 7.45 4.22 0.57 32.0

May 7.18 1972 0.16 1971 2.06 2.98 1.45 8.84

June 1.65 1972 0.04 1974 0.42 0.69 1.64 1.81

July 0.48 1972 0.04 1974 0.15 0.17 1.13 0.65

August 0.38 1972 0.02 1977 0.12 0.15 1.18 0.53

September 0.26 1978 0.05 1973 0.12 0.07 0.59 0.54

Annual 2.90 1972 0.59 1971 1.92 0.91 0.47 100
280

9-2.000-1A KUSHK RIVER AT CHIL DUKHTARAN, Continued 

Monthly and annual flow duration, in cubic meters per second 

[ng, not given] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 0.08 0.10 0.30 0.54 0.75 0.14 0.50 0.04 0.04 0.02 0.01 0.03 0.04

90 0.09 0.13 0.37 0.60 0.99 0.81 1.14 0.07 0.05 0.03 0.02 0.04 0.05

85 0.09 0.16 0.40 0.64 1.03 1.38 1.67 0.09 0.05 0.04 0.02 0.05 0.06

80 0.10 0.17 0.43 0.73 1.07 3.15 2.35 0.10 0.05 0.04 0.02 0.05 0.09

75 0.10 0.24 0.47 0.77 1.34 3.44 2.97 0.12 0.06 0.05 0.03 0.06 0.12

70 0.10 0.27 0.51 0.92 1.54 3.72 4.19 0.14 0.06 0.05 0.03 0.07 0.16

65 0.12 0.30 0.56 0.98 1.69 4.22 4.87 0.2 0.07 0.05 0.04 0.07 0.23

60 0.13 0.34 0.63 1.03 1.83 5.08 5.39 0.22 0.07 0.06 0.04 0.08 0.28

55 0.15 0.36 0.68 1.06 2.01 6.07 5.92 0.23 0.08 0.06 0.05 0.08 0.37

50 0.16 0.38 0.72 1.10 2.09 6.71 6.46 0.32 0.11 0.07 0.05 0.09 0.44

45 0.17 0.41 0.76 1.15 2.17 7.35 7.22 0.45 0.13 0.11 0.06 0.11 0.55

40 0.19 0.51 0.80 1.20 2.51 8.18 7.86 0.57 0.14 0.13 0.07 0.12 0.75

35 0.20 0.54 0.88 1.26 2.77 9.01 8.45 0.84 0.15 0.14 0.09 0.14 0.92

30 0.21 0.56 0.98 1.35 2.98 9.64 9.48 1.31 0.29 0.14 0.12 0.15 1.16

25 0.21 0.60 1.13 1.55 3.21 10.3 10.8 3.58 0.33 0.22 0.27 0.19 1.65

20 0.22 0.66 1.29 1.88 3.92 10.9 12.1 5.16 0.37 0.25 0.29 0.24 2.56

15 0.24 0.76 1.43 2.02 4.42 11.9 13.2 6.62 0.75 0.32 0.30 0.26 4.22

10 0.39 0.92 1.63 2.63 4.95 13.2 15.4 7.22 0.98 0.36 0.35 0.27 6.73

5 0.47 1.38 2.12 3.16 6.07 15.5 17.6 8.44 2.82 0.47 ng 0.28 10.1
281

9-2.000-1A KUSHK RIVER AT CHIL DUKHTARAN, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge1 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 7.90 5.75 3.17 1.55 0.96

0.95 1.05 14.0 8.20 5.69 3.54 2.45

0.90 1.11 18.8 9.71 7.36 5.07 3.69

0.80 1.25 26.5 11.7 9.56 7.31 5.60

0.50 2 49.1 15.9 13.7 12.1 9.96

0.20 5 86.7 20.3 16.9 16.0 13.8

0.10 10 114 22.5 17.9 17.3 15.1

0.04 25 152 24.8 18.6 18.1 16.0

0.02 50 181 26.1 18.9 18.4 16.4

0.01 100 211 27.3 19.1 18.6 16.6

0.005 200 241 28.2 19.2 18.7 16.7

0.002 500 283 ng ng ng ng

1

Less than 10 years of data used.

9-2.000-1A KUSHK RIVER AT CHIL DUKHTARAN, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 0.01 0.01 0.01 0.01 0.02 0.03 0.03 0.03 0.04

0.10 10 0.01 0.01 0.01 0.01 0.02 0.03 0.03 0.04 0.05

0.20 5 0.01 0.01 0.02 0.02 0.03 0.03 0.04 0.05 0.06

0.50 2 0.02 0.02 0.02 0.03 0.04 0.06 0.08 0.09 0.11
282

9-2.000-1A KUSHK RIVER AT CHIL DUKHTARAN, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 0.01 0.29 0.34 0.45 0.01 0.02 0.04 0.09

0.10 10 0.03 0.30 0.36 0.51 0.02 0.02 0.05 0.13

0.20 5 0.08 0.31 0.40 0.59 0.02 0.03 0.06 0.21

0.50 2 0.31 0.38 0.52 0.80 0.07 0.10 0.15 0.65

June-July-August September-October-November

0.05 20 0.01 0.01 0.01 0.02 0.02 0.03 0.04 0.04

0.10 10 0.01 0.01 0.01 0.02 0.02 0.03 0.04 0.05

0.20 5 0.01 0.02 0.02 0.03 0.02 0.03 0.04 0.06

0.50 2 0.04 0.04 0.05 0.06 0.03 0.04 0.05 0.09

9-2.000-1A KUSHK RIVER AT CHIL DUKHTARAN, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1971 April 9, 1971 17.8 1978 December 24, 1977 116

1972 March 18, 1972 58.0 1973 March 24, 1973 61.0

1973 March 24, 1973 61.0 1972 March 18, 1972 58.0

1974 April 12, 1974 32.8 1974 April 12, 1974 32.8

1978 December 24, 1977 116 1971 April 9, 1971 17.8
283

9-2.000-1A KUSHK RIVER AT CHIL DUKHTARAN, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[--, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1970 -- -- -- -- -- -- -- -- -- -- 0.06 0.08 --

1971 0.18 0.33 0.59 0.65 1.57 1.11 2.31 0.16 0.10 0.06 0.06 0.11 0.59

1972 0.15 1.07 0.57 1.62 2.55 10.1 8.90 7.18 1.65 0.48 0.38 0.18 2.90

1973 0.35 0.56 1.21 1.69 3.28 6.33 5.22 0.33 0.06 0.05 0.04 0.05 1.58

1974 0.09 0.17 0.60 2.03 3.53 9.16 13.6 2.17 0.04 0.04 0.04 0.06 2.61

1975 0.09 0.27 1.29 1.36 3.68 -- -- -- -- -- -- -- --

1977 -- -- -- -- -- -- -- -- -- 0.10 0.02 0.13 --

1978 0.21 1.07 1.85 1.14 1.57 8.60 7.21 0.44 0.26 0.18 0.28 0.26 1.92
284

9-3.000-1A KASHAN RIVER AT BABULAI

(U.S. Geological Survey identification number: 352000062550000)

LOCATION: Lat 35o20'N., long 62o55'E.

DRAINAGE AREA: 5,265 km2

.

ELEVATION: 557 meters above mean sea level.

PERIOD OF RECORD: December 22, 1973 to September 30, 1978.

GAGE: Water-stage recorder.

0

1

2

3

4

5

6

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
285

9-3.000-1A KASHAN RIVER AT BABULAI, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 0.77 1977 0.14 1978 0.45 0.30 0.66 1.61

November 1.06 1978 0.87 1975 0.99 0.09 0.09 3.50

December 4.38 1978 1.14 1976 2.52 1.59 0.63 8.93

January 2.29 1975 0.77 1974 1.38 0.56 0.40 4.88

February 4.82 1975 0.84 1974 2.75 1.90 0.69 9.72

March 14.8 1975 1.37 1977 5.87 5.58 0.95 20.8

April 26.9 1975 1.88 1978 10.6 10.6 1.00 37.5

May 6.99 1975 0.09 1978 3.39 3.22 0.95 12.0

June 0.37 1975 0.01 1978 0.17 0.18 1.03 0.62

July 0.20 1976 0 1978 0.06 0.09 1.46 0.21

August 0.04 1976 0 1975 0.01 0.02 1.82 0.04

September 0.35 1976 0 1974 0.07 0.16 2.22 0.25

Annual 5.04 1975 1.22 1978 2.68 1.83 0.68 100
286

9-3.000-1A KASHAN RIVER AT BABULAI, Continued 

Monthly and annual flow duration, in cubic meters per second 

[ng, not given] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 0 0.58 0.80 0.54 0.69 0.91 0.41 0.02 0 0 0 0 0

90 0 0.70 0.85 0.57 0.74 1.04 0.70 0.05 0 0 0 0 0

85 0.01 0.73 0.89 0.61 0.85 1.21 0.88 0.09 0.01 0 0 0 0

80 0.04 0.75 1.02 0.70 0.94 1.33 1.19 0.12 0.01 0 0 0 0.01

75 0.10 0.82 1.09 0.74 1.02 1.44 1.44 0.15 0.02 0 0 0 0.02

70 0.12 0.85 1.15 0.83 1.07 1.52 1.98 0.20 0.02 0 0 0 0.19

65 0.29 0.87 1.19 0.96 1.11 1.61 2.31 0.22 0.03 0 0 0 0.27

60 0.31 0.90 1.22 1.04 1.32 1.78 2.57 0.24 0.03 0 0 0 0.42

55 0.48 0.94 1.26 1.23 1.44 2.28 3.43 0.26 0.04 0.01 0 0 0.66

50 0.52 0.99 1.30 1.27 1.49 2.58 4.52 0.31 0.05 0.01 0 0 0.80

45 0.55 1.04 1.33 1.29 1.54 2.78 5.77 0.62 0.06 0.01 0 0 0.95

40 0.59 1.06 1.36 1.32 1.64 2.97 7.56 1.15 0.23 0.02 0 0 1.12

35 0.64 1.07 1.40 1.35 1.79 4.21 9.01 1.96 0.25 0.02 0.01 0 1.26

30 0.67 1.09 1.43 1.41 2.01 5.38 11.5 2.56 0.26 0.02 0.01 0 1.39

25 0.71 1.10 1.49 1.46 3.00 5.93 13.6 3.20 0.27 0.08 0.01 0 1.52

20 0.74 1.13 1.56 1.52 3.81 6.81 15.8 4.79 0.29 ng 0.02 0.02 1.99

15 0.78 1.18 1.63 1.57 4.63 8.14 18.1 6.02 0.31 ng 0.02 0.25 3.28

10 0.85 1.24 1.92 1.77 6.12 12.9 30.2 7.47 0.46 ng 0.02 0.27 5.88

5 0.97 1.33 8.32 2.81 11.0 18.3 40.8 14.6 0.61 ng ng ng 12.3
287

9-3.000-1A KASHAN RIVER AT BABULAI, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge1 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 ng 25.6 9.21 3.17 1.35

0.95 1.05 ng 27.1 10.6 4.36 2.22

0.90 1.11 ng 28.5 11.8 5.35 2.96

0.80 1.25 ng 31.2 14.0 7.13 4.30

0.50 2 82.9 40.9 22.7 14.0 9.45

0.20 5 111 62.8 46.2 32.7 23.0

0.10 10 119 84.5 74.2 54.9 38.2

0.04 25 125 2

123 134 101 67.8

0.02 50 127 2

162 205 156 100

0.01 100 128 2

212 310 234 144

0.005 200 129 2

277 467 348 202

0.002 500 129 ng ng ng ng

1

Less than 10 years of data used.

2

Data does not fit log-Pearson Type III curve, use with caution.

9-3.000-1A KASHAN RIVER AT BABULAI, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second; ng, not given] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 ng ng ng ng ng ng ng ng ng

0.10 10 ng ng ng ng ng ng ng ng ng

0.20 5 ng ng ng ng ng ng ng ng ng

0.50 2 ng ng ng ng ng ng ng ng ng
288

9-3.000-1A KASHAN RIVER AT BABULAI, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second; ng, not given] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 0.38 0.46 0.50 0.73 0.01 0.01 0 0.03

0.10 10 0.44 0.54 0.59 0.80 0.01 0.01 0.01 0.06

0.20 5 0.52 0.64 0.72 0.91 0.04 0.04 0.04 0.13

0.50 2 0.73 0.90 1.00 1.18 0.19 0.23 0.31 0.63

June-July-August September-October-November

0.05 20 ng ng ng ng ng ng ng ng

0.10 10 ng ng ng ng ng ng ng ng

0.20 5 ng ng ng ng ng ng ng ng

0.50 2 ng ng ng ng ng ng ng ng

9-3.000-1A KASHAN RIVER AT BABULAI, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1974 April 7, 1974 26.0 1975 April 3, 1975 106

1975 April 3, 1975 106 1977 April 9, 1977 102

1976 April 28, 1976 75.1 1978 December 24, 1977 80.4

1977 April 9, 1977 102 1976 April 28, 1976 75.1

1978 December 24, 1977 80.4 1974 April 7, 1974 26.0
289

9-3.000-1A KASHAN RIVER AT BABULAI, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[--, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1974 -- -- -- 0.77 0.84 1.60 4.46 0.24 0.04 0.01 0.01 0 --

1975 0.27 0.87 3.31 2.29 4.82 14.8 26.9 6.99 0.37 0.08 0 0 5.04

1976 0.64 0.96 1.14 1.20 4.76 7.58 15.6 6.14 0.36 0.20 0.04 0.35 3.23

1977 0.77 1.06 1.26 1.35 1.48 1.37 4.05 3.48 0.09 0 0 0 1.24

1978 0.14 1.06 4.38 1.28 1.83 4.01 1.88 0.09 0.01 0 0 0 1.22
290

9-4.R00-8A CHICHAKTU RIVER AT CHICHAKTU

(U.S. Geological Survey identification number: 354400064050000)

LOCATION: Lat 35o44'N., long 64o05'E.

DRAINAGE AREA: 415 km2

.

ELEVATION: 1,023 meters above mean sea level.

PERIOD OF RECORD: May 1, 1970 to September 30, 1978

GAGE: Water-stage recorder.

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
291

9-4.R00-8A CHICHAKTU RIVER AT CHICHAKTU, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 0.57 1975 0.29 1978 0.44 0.10 0.24 4.94

November 0.61 1975 0.26 1978 0.45 0.14 0.31 5.09

December 0.90 1978 0.35 1972 0.54 0.19 0.35 6.14

January 0.76 1973 0.26 1978 0.52 0.17 0.33 5.82

February 1.24 1975 0.53 1974 0.71 0.23 0.33 8.01

March 5.19 1972 0.51 1977 1.64 1.62 0.99 18.5

April 5.10 1972 0.45 1977 1.96 1.62 0.82 22.1

May 3.58 1976 0.18 1971 1.05 1.10 1.05 11.8

June 1.42 1972 0.15 1977 0.58 0.43 0.73 6.56

July 0.60 1976 0.12 1977 0.35 0.18 0.52 3.94

August 0.57 1975 0.14 1970 0.32 0.15 0.46 3.61

September 0.49 1973 0.21 1971 0.31 0.11 0.35 3.54

Annual 1.43 1972 0.35 1971 0.76 0.35 0.46 100
292

9-4.R00-8A CHICHAKTU RIVER AT CHICHAKTU, Continued 

Monthly and annual flow duration, in cubic meters per second 

[ng, not given] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 0.19 0.26 0.31 0.25 0.25 0.38 0.21 0.08 0.05 0.03 0.03 0.14 0.15

90 0.26 0.28 0.35 0.31 0.33 0.52 0.31 0.15 0.13 0.08 0.09 0.17 0.21

85 0.29 0.29 0.36 0.39 0.46 0.55 0.44 0.20 0.17 0.11 0.14 0.20 0.26

80 0.32 0.29 0.37 0.40 0.48 0.58 0.51 0.23 0.20 0.16 0.16 0.21 0.28

75 0.33 0.31 0.38 0.40 0.53 0.60 0.59 0.27 0.23 0.19 0.19 0.24 0.31

70 0.34 0.35 0.39 0.41 0.56 0.65 0.69 0.3 0.27 0.22 0.21 0.26 0.34

65 0.35 0.36 0.41 0.43 0.57 0.70 0.86 0.32 0.31 0.26 0.24 0.28 0.38

60 0.37 0.37 0.43 0.47 0.58 0.72 0.93 0.35 0.36 0.29 0.26 0.29 0.42

55 0.39 0.42 0.46 0.48 0.59 0.75 1.00 0.41 0.40 0.30 0.28 0.29 0.45

50 0.41 0.44 0.48 0.49 0.60 0.77 1.12 0.61 0.55 0.31 0.30 0.30 0.49

45 0.45 0.49 0.49 0.50 0.61 0.81 1.23 0.76 0.62 0.37 0.31 0.31 0.52

40 0.49 0.50 0.50 0.51 0.64 0.86 1.31 0.89 0.68 0.40 0.36 0.31 0.56

35 0.51 0.53 0.52 0.58 0.66 0.94 1.38 0.99 0.75 0.45 0.38 0.33 0.60

30 0.52 0.57 0.53 0.59 0.69 1.08 1.71 1.10 0.80 0.50 0.40 0.38 0.65

25 0.53 0.58 0.59 0.61 0.71 1.24 2.24 1.22 0.84 0.52 0.43 0.40 0.71

20 0.57 0.59 0.63 0.70 0.74 1.47 2.83 1.64 0.89 0.55 0.50 0.43 0.77

15 0.61 0.60 0.66 0.73 0.8 1.98 3.75 1.81 1.00 0.59 0.53 0.48 0.96

10 0.63 0.69 0.69 0.77 1.10 3.01 4.53 1.98 1.29 0.64 0.58 0.51 1.26

5 0.67 0.71 0.82 0.82 1.42 6.89 6.79 2.9 1.51 ng ng 0.54 1.96
293

9-4.R00-8A CHICHAKTU RIVER AT CHICHAKTU, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge1 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 0.50 0.47 0.35 20.26 0.27

0.95 1.05 1.40 0.91 0.66 0.51 0.50

0.90 1.11 2.50 1.29 0.93 0.73 0.69

0.80 1.25 4.60 1.98 1.42 1.13 1.02

0.50 2 13.2 4.54 3.27 2.53 2.09

0.20 5 32.3 10.6 7.75 5.61 4.22

0.10 10 48.7 16.6 12.3 8.47 6.04

0.04 25 72.2 26.8 20.3 13.1 8.82

0.02 50 91.1 36.7 28.2 17.3 11.2

0.01 100 111 48.7 38.0 22.1 13.9

0.005 200 131 63.2 50.1 27.8 16.9

0.002 500 157 ng ng ng ng

1

Less than 10 years of data used.

2

Data does not fit log-Pearson Type III curve, use with caution.

9-4.R00-8A CHICHAKTU RIVER AT CHICHAKTU, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 0 0 0.04 0.08 0.10 0.11 0.13 0.14 0.18

0.10 10 0 0 0.06 0.09 0.12 0.13 0.16 0.17 0.22

0.20 5 0 0.02 0.07 0.11 0.14 0.17 0.20 0.22 0.27

0.50 2 0.06 0.09 0.14 0.16 0.20 0.25 0.30 0.33 0.38
294

9-4.R00-8A CHICHAKTU RIVER AT CHICHAKTU, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 0.15 0.19 0.20 0.22 0.01 0.10 0.11 0.15

0.10 10 0.19 0.23 0.24 0.26 0.02 0.13 0.15 0.20

0.20 5 0.24 0.29 0.30 0.32 0.04 0.19 0.21 0.29

0.50 2 0.36 0.39 0.41 0.42 0.16 0.35 0.40 0.55

June-July-August September-October-November

0.05 20 0 0.05 0.08 0.09 0.01 0.10 0.13 0.18

0.10 10 0 0.06 0.09 0.12 0.02 0.12 0.14 0.19

0.20 5 0 0.09 0.12 0.15 0.05 0.14 0.16 0.21

0.50 2 0.07 0.18 0.20 0.24 0.14 0.21 0.23 0.28

9-4.R00-8A CHICHAKTU RIVER AT CHICHAKTU, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1971 April 8, 1971 2.82 1977 April 9, 1977 56.5

1972 March 27, 1972 20.0 1978 December 24, 1977 26.4

1973 June 6, 1973 1.74 1976 May 12, 1976 25.0

1974 March 31, 1974 8.86 1972 March 27, 1972 20.0

1975 April 7, 1975 11.3 1975 April 7, 1975 11.3

1976 May 12, 1976 25.0 1974 March 31, 1974 8.86

1977 April 9, 1977 56.5 1971 April 8, 1971 2.82

1978 December 24, 1977 26.4 1973 June 6, 1973 1.74
295

9-4.R00-8A CHICHAKTU RIVER AT CHICHAKTU, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[--, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1970 -- -- -- -- -- -- -- 0.22 0.28 0.16 0.14 0.24 --

1971 0.33 0.34 0.37 0.46 0.61 0.61 0.55 0.18 0.15 0.25 0.18 0.21 0.35

1972 0.42 0.38 0.35 0.53 0.58 5.19 5.10 1.90 1.42 0.40 0.41 0.42 1.43

1973 0.52 0.59 0.52 0.76 0.70 0.80 1.35 1.13 1.02 0.54 0.45 0.49 0.74

1974 0.50 0.54 0.48 0.53 0.53 0.89 1.55 0.99 0.48 0.23 0.32 0.47 0.63

1975 0.57 0.61 0.72 0.75 1.24 1.45 3.08 0.82 0.68 0.56 0.57 0.25 0.94

1976 0.36 0.33 0.42 0.42 0.57 0.80 2.89 3.58 0.73 0.60 0.35 0.22 0.94

1977 0.53 0.56 0.60 0.43 0.62 0.51 0.45 0.26 0.15 0.12 0.16 0.27 0.39

1978 0.29 0.26 0.90 0.26 0.85 2.86 0.74 0.34 0.35 0.31 0.31 0.28 0.65
296

9-5.L00-1A BUM RIVER AT LUKA-I-SURKH

(U.S. Geological Survey identification number: 351400063280000)

LOCATION: Lat 35o14'N., long 63o28'E.

DRAINAGE AREA: 1,225 km2

.

ELEVATION: 594 meters above mean sea level.

PERIOD OF RECORD: April 3, 1969 to September 30, 1978.

GAGE: Water-stage recorder.

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
297

9-5.L00-1A BUM RIVER AT LUKA-I-SURKH, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 0.38 1970 0.07 1973 0.16 0.09 0.59 3.89

November 0.54 1970 0.08 1975 0.20 0.14 0.70 4.95

December 0.53 1978 0.12 1974 0.22 0.13 0.59 5.49

January 0.38 1973 0.11 1976 0.21 0.11 0.51 5.07

February 0.38 1975 0.11 1971 0.28 0.10 0.37 6.87

March 1.44 1972 0.18 1974 0.65 0.42 0.64 16.0

April 3.48 1975 0.13 1970 1.16 1.09 0.94 28.3

May 2.66 1969 0.02 1971 0.88 1.02 1.15 21.6

June 0.47 1975 0.01 1971 0.15 0.16 1.07 3.74

July 0.13 1976 0.01 1971 0.04 0.04 1.02 0.98

August 0.09 1969 0.01 1972 0.03 0.03 0.95 0.72

September 0.27 1969 0.01 1974 0.10 0.08 0.79 2.49

Annual 0.69 1975 0.11 1971 0.32 0.19 0.60 100
298

9-5.L00-1A BUM RIVER AT LUKA-I-SURKH, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 0.05 0.07 0.09 0.07 0.08 0.09 0.06 0.01 0.01 0 0.01 0.01 0.01

90 0.06 0.09 0.10 0.09 0.10 0.15 0.10 0.02 0.01 0.01 0.01 0.01 0.02

85 0.07 0.09 0.11 0.10 0.12 0.18 0.18 0.02 0.01 0.01 0.01 0.02 0.02

80 0.08 0.10 0.13 0.12 0.15 0.23 0.24 0.02 0.02 0.01 0.01 0.02 0.02

75 0.10 0.11 0.14 0.13 0.18 0.24 0.32 0.03 0.02 0.01 0.01 0.02 0.04

70 0.10 0.13 0.15 0.14 0.19 0.27 0.38 0.05 0.02 0.01 0.01 0.03 0.07

65 0.12 0.14 0.16 0.15 0.23 0.31 0.44 0.06 0.02 0.02 0.02 0.04 0.09

60 0.13 0.15 0.16 0.15 0.24 0.34 0.57 0.09 0.02 0.02 0.02 0.06 0.11

55 0.14 0.16 0.17 0.16 0.26 0.36 0.70 0.15 0.03 0.02 0.02 0.07 0.14

50 0.15 0.17 0.19 0.17 0.27 0.39 0.81 0.25 0.05 0.02 0.02 0.10 0.15

45 0.16 0.19 0.20 0.18 0.32 0.42 0.90 0.38 0.07 0.02 0.02 0.11 0.17

40 0.16 0.20 0.22 0.21 0.33 0.48 1.00 0.58 0.13 0.02 0.02 0.13 0.19

35 0.19 0.20 0.23 0.24 0.34 0.57 1.10 0.73 0.18 0.02 0.03 0.14 0.22

30 0.20 0.21 0.24 0.25 0.35 0.63 1.31 1.13 0.21 0.04 0.03 0.15 0.26

25 0.20 0.24 0.25 0.27 0.36 0.72 1.62 1.38 0.24 0.06 0.04 0.16 0.31

20 0.21 0.26 0.26 0.30 0.38 0.94 2.12 1.61 0.28 0.08 0.05 0.17 0.36

15 0.25 0.32 0.32 0.35 0.40 1.18 2.38 1.98 0.35 0.10 0.07 0.20 0.44

10 0.32 0.40 0.36 0.38 0.43 1.49 2.76 2.70 0.42 0.14 0.08 0.24 0.70

5 0.38 0.42 0.39 0.43 0.52 2.17 3.88 3.09 0.66 0.20 0.12 0.27 1.42
299

9-5.L00-1A BUM RIVER AT LUKA-I-SURKH, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 0.80 0.31 0.27 0.26 0.18

0.95 1.05 1.80 0.63 0.49 0.40 0.29

0.90 1.11 2.80 0.90 0.67 0.52 0.37

0.80 1.25 4.50 1.35 0.95 0.70 0.52

0.50 2 11.2 2.72 1.81 1.30 1.00

0.20 5 27.4 4.98 3.29 2.49 2.04

0.10 10 43.2 6.61 4.41 3.54 3.01

0.04 25 69.6 8.72 5.96 5.20 4.66

0.02 50 94.4 10.3 7.18 6.71 6.22

0.01 100 124 11.8 1

8.44 8.47 8.13

0.005 200 158 13.4 1

9.76 10.5 10.4

0.002 500 213 ng ng ng ng

1

Data does not fit log-Pearson Type III curve, use with caution.

9-5.L00-1A BUM RIVER AT LUKA-I-SURKH, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 0 0 0 0 0 0.01 0.01 0.01 0.02

0.10 10 0 0 0 0 0 0.01 0.01 0.01 0.03

0.20 5 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.04

0.50 2 0.01 0.01 0.01 0.01 0.01 0.02 0.02 0.03 0.07
300

9-5.L00-1A BUM RIVER AT LUKA-I-SURKH, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 0.01 0.05 0.06 0.08 0 0.01 0 0.01

0.10 10 0.01 0.05 0.07 0.09 0.01 0.01 0.01 0.01

0.20 5 0.02 0.06 0.08 0.10 0.01 0.02 0.02 0.03

0.50 2 0.04 0.09 0.11 0.13 0.03 0.05 0.07 0.15

June-July-August September-October-November

0.05 20 0 0 0 0 0.01 0.01 0.01 0.01

0.10 10 0 0 0 0 0.01 0.01 0.01 0.02

0.20 5 0.01 0.01 0.01 0.01 0.01 0.01 0.02 0.03

0.50 2 0.01 0.01 0.01 0.01 0.02 0.04 0.05 0.07

9-5.L00-1A BUM RIVER AT LUKA-I-SURKH, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1969 April 14, 1969 39.4 1972 May 7, 1972 40.0

1970 March 25, 1970 9.00 1969 April 14, 1969 39.4

1971 April 4, 1971 2.24 1975 May 8, 1975 39.0

1972 May 7, 1972 40.0 1977 April 9, 1977 18.8

1973 March 26, 1973 4.91 1978 December 27, 1977 9.45

1974 April 8, 1974 2.77 1970 March 25, 1970 9.00

1975 May 8, 1975 39.0 1976 April 27, 1976 8.98

1976 April 27, 1976 8.98 1973 March 26, 1973 4.91

1977 April 9, 1977 18.8 1974 April 8, 1974 2.77

1978 December 27, 1977 9.45 1971 April 4, 1971 2.24
301

9-5.L00-1A BUM RIVER AT LUKA-I-SURKH, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[--, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1969 -- -- -- -- -- -- -- 2.66 0.32 0.07 0.09 0.27 --

1970 0.38 0.54 0.35 0.38 0.32 0.48 0.13 0.04 0.03 0.01 0.03 0.14 0.24

1971 0.17 0.16 0.14 0.13 0.11 0.19 0.34 0.02 0.01 0.01 0.02 0.04 0.11

1972 0.08 0.13 0.13 0.20 0.37 1.44 1.33 1.38 0.02 0.01 0.01 0.02 0.43

1973 0.07 0.10 0.20 0.38 0.30 0.88 1.24 0.23 0.15 0.07 0.06 0.16 0.32

1974 0.17 0.13 0.12 0.12 0.17 0.18 0.46 0.06 0.01 0.01 0.01 0.01 0.12

1975 0.07 0.08 0.15 0.14 0.38 0.82 3.48 2.46 0.47 0.07 0.01 0.09 0.69

1976 0.20 0.18 0.20 0.11 0.36 0.98 2.20 1.38 0.32 0.13 0.01 0.15 0.52

1977 0.17 0.21 0.20 0.22 0.35 0.34 0.31 0.32 0.15 0.01 0.01 0.05 0.19

1978 0.14 0.31 0.53 0.18 0.17 0.59 0.92 0.29 0.05 0.02 0.04 0.08 0.28
302

10-0.000-3M SHIRIN TAGAB RIVER AT PATA BABA

(U.S. Geological Survey identification number: 363500064520000)

LOCATION: Lat 36o35'N., long 64o52'E.

DRAINAGE AREA: 11,775 km2

.

ELEVATION: 371 meters above mean sea level.

PERIOD OF RECORD: May 23, 1964 to September 30, 1978.

GAGE: Water-stage recorder. Staff gage at same site and datum prior to 1970 water year.

0

2

4

6

8

10

12

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
303

10-0.000-3M SHIRIN TAGAB RIVER AT PATA BABA, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 3.42 1970 0.82 1976 1.87 0.70 0.38 3.90

November 5.91 1970 1.26 1975 2.76 1.21 0.44 5.76

December 10.2 1969 1.16 1972 3.72 2.41 0.65 7.78

January 8.09 1973 1.10 1972 3.45 1.88 0.54 7.22

February 9.16 1973 2.59 1972 4.12 1.86 0.45 8.60

March 22.4 1972 2.57 1977 7.74 6.51 0.84 16.2

April 42.4 1969 1.98 1966 11.9 11.1 0.94 24.8

May 21.4 1969 0.53 1971 7.59 7.50 0.99 15.9

June 8.03 1972 0.59 1974 1.77 1.95 1.10 3.70

July 2.48 1972 0.47 1977 1.04 0.63 0.61 2.16

August 2.03 1969 0.37 1977 0.97 0.50 0.51 2.03

September 2.10 1969 0.42 1975 0.96 0.48 0.50 2.02

Annual 9.80 1969 1.83 1966 3.98 2.22 0.56 100
304

10-0.000-3M SHIRIN TAGAB RIVER AT PATA BABA, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 0.71 1.10 1.20 1.11 2.04 2.14 1.05 0.46 0.40 0.31 0.30 0.35 0.42

90 0.77 1.26 1.37 1.41 2.25 2.57 1.50 0.59 0.47 0.36 0.33 0.39 0.57

85 0.87 1.38 1.68 1.60 2.48 2.76 1.71 0.62 0.57 0.41 0.37 0.45 0.71

80 0.97 1.56 1.84 1.80 2.71 2.95 2.06 0.66 0.66 0.47 0.48 0.52 0.84

75 1.09 1.83 2.04 1.98 2.92 3.11 2.40 0.69 0.71 0.50 0.53 0.56 1.02

70 1.23 2.05 2.34 2.22 3.11 3.28 2.69 0.90 0.78 0.54 0.62 0.60 1.19

65 1.34 2.33 2.58 2.41 3.24 3.45 3.06 1.18 0.85 0.61 0.67 0.69 1.41

60 1.49 2.53 2.70 2.55 3.34 3.63 3.51 1.39 0.92 0.67 0.71 0.74 1.65

55 1.68 2.60 2.83 2.70 3.42 3.80 4.32 1.69 1.00 0.72 0.74 0.77 1.90

50 1.80 2.67 2.95 2.88 3.50 4.10 5.22 2.68 1.07 0.78 0.80 0.81 2.15

45 1.95 2.75 3.08 3.13 3.58 4.41 6.19 3.59 1.16 0.87 0.90 0.87 2.41

40 2.09 2.83 3.24 3.38 3.68 4.82 7.70 4.84 1.27 1.04 1.05 0.97 2.68

35 2.18 2.96 3.45 3.56 3.78 5.63 9.66 6.54 1.39 1.13 1.12 1.05 2.98

30 2.28 3.11 3.75 3.77 3.88 6.74 11.4 9.19 1.54 1.31 1.19 1.13 3.30

25 2.39 3.28 4.04 4.06 4.23 8.27 12.6 11.2 1.74 1.53 1.34 1.24 3.68

20 2.55 3.43 4.29 4.52 4.76 9.37 14.5 13.5 2.02 1.69 1.45 1.42 4.18

15 2.71 3.63 4.73 5.22 5.45 11.2 19.5 16.2 2.41 1.84 1.65 1.62 5.31

10 3.04 3.96 5.39 6.31 7.02 15.2 30.6 20.8 3.16 2.12 1.93 1.89 7.70

5 3.80 5.68 6.56 8.16 8.64 24.6 53.3 27.7 4.98 2.39 2.13 2.09 13.4
305

10-0.000-3M SHIRIN TAGAB RIVER AT PATA BABA, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 ng 2.13 2.06 11.88 2.02

0.95 1.05 ng 6.63 5.12 3.99 3.49

0.90 1.11 21.9 11.1 7.86 5.79 4.65

0.80 1.25 40.8 18.9 12.5 8.83 6.56

0.50 2 94.5 41.4 26.4 18.3 12.5

0.20 5 149 68.6 46.4 34.1 23.4

0.10 10 168 81.4 58.3 45.5 32.3

0.04 25 180 92.4 71.2 60.2 45.2

0.02 50 185 97.8 79.3 71.1 56.1

0.01 100 187 102 86.2 81.7 68.0

0.005 200 188 104 1

92.1 92.2 80.9

0.002 500 189 ng ng ng ng

1

Data does not fit log-Pearson Type III curve, use with caution.

10-0.000-3M SHIRIN TAGAB RIVER AT PATA BABA, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 0.16 0.18 0.20 0.26 0.32 0.37 0.40 0.44 0.59

0.10 10 0.18 0.19 0.22 0.27 0.35 0.41 0.45 0.49 0.67

0.20 5 0.20 0.22 0.25 0.31 0.40 0.47 0.52 0.58 0.80

0.50 2 0.30 0.32 0.36 0.44 0.57 0.68 0.75 0.83 1.17
306

10-0.000-3M SHIRIN TAGAB RIVER AT PATA BABA, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 0.86 0.94 1.02 1.13 0.27 0.35 0.36 0.42

0.10 10 1.04 1.16 1.25 1.37 0.32 0.42 0.48 0.6

0.20 5 1.28 1.46 1.57 1.71 0.41 0.57 0.68 0.92

0.50 2 1.88 2.16 2.31 2.6 0.79 1.17 1.49 2.26

June-July-August September-October-November

0.05 20 0.15 0.2 0.26 0.36 0.19 0.27 0.34 0.41

0.10 10 0.18 0.22 0.29 0.41 0.23 0.31 0.38 0.46

0.20 5 0.22 0.27 0.34 0.49 0.29 0.37 0.45 0.55

0.50 2 0.36 0.43 0.52 0.73 0.49 0.57 0.66 0.79
307

10-0.000-3M SHIRIN TAGAB RIVER AT PATA BABA, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1965 April 23, 1965 134 1977 April 10, 1977 195

1965 December 5, 1965 5.45 1976 April 9, 1976 160

1967 May 10, 1967 50.0 1969 April 14, 1969 140

1968 April 26, 1968 87.0 1972 March 19, 1972 135

1969 April 14, 1969 140 1965 April 23, 1965 134

1970 March 27, 1970 80.0 1974 April 7, 1974 100

1971 April 16, 1971 27.0 1968 April 26, 1968 87.0

1972 March 19, 1972 135 1970 March 27, 1970 80.0

1973 March 26, 1973 72.0 1973 March 26, 1973 72.0

1974 April 7, 1974 100 1978 December 25, 1977 61.1

1975 May 4, 1975 60.0 1975 May 4, 1975 60.0

1976 April 9, 1976 160 1967 May 10, 1967 50.0

1977 April 10, 1977 195 1971 April 16, 1971 27.0

1978

December 25, 

1977 61.1 1965 December 5, 1965 5.45
308

10-0.000-3M SHIRIN TAGAB RIVER AT PATA BABA, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[--, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1964 -- -- -- -- -- -- -- -- 1.21 1.26 1.13 1.09 --

1965 2.17 3.24 3.79 4.30 6.16 8.19 15.2 5.95 1.60 0.86 0.91 0.77 4.41

1966 2.37 3.07 3.25 1.65 2.73 3.37 1.98 0.81 0.91 0.51 0.57 0.74 1.83

1967 1.69 2.12 1.42 2.24 3.13 3.58 5.01 10.6 0.75 0.61 1.01 0.95 2.76

1968 2.22 3.28 3.23 3.20 3.44 3.39 8.83 8.64 1.08 0.81 0.61 0.51 3.27

1969 1.69 3.03 10.2 6.22 5.98 16.4 42.4 21.4 4.10 2.11 2.03 2.10 9.80

1970 3.42 5.91 4.78 3.69 3.66 7.71 2.66 0.61 0.72 0.53 0.56 1.01 2.94

1971 2.36 2.94 2.96 2.69 3.60 3.47 2.07 0.53 0.60 0.51 0.71 0.62 1.91

1972 0.94 1.38 1.16 1.10 2.59 22.4 21.9 19.1 8.03 2.48 1.41 0.91 6.96

1973 2.14 2.97 4.56 8.09 9.16 18.2 11.3 1.55 1.05 1.36 1.28 1.58 5.26

1974 1.59 1.46 2.94 3.42 3.01 2.69 8.07 2.25 0.59 0.50 0.60 0.46 2.29

1975 0.88 1.26 2.05 2.20 2.96 3.95 12.0 12.0 1.19 0.81 0.52 0.42 3.35

1976 0.82 1.58 1.86 1.89 2.64 4.31 23.3 18.1 2.43 1.67 1.86 1.52 5.16

1977 2.22 2.67 2.82 3.28 3.57 2.57 5.97 2.98 1.05 0.47 0.37 0.54 2.36

1978 1.64 3.68 7.09 4.37 4.99 8.08 5.13 1.80 1.25 1.03 1.03 1.24 3.44
309

10-0.000-4M SHIRIN TAGAB RIVER AT DAULATABAD

(U.S. Geological Survey identification number: 362700064530000)

LOCATION: Lat 36o27'N., long 64o53'E.

DRAINAGE AREA: 4,645 km2

.

ELEVATION: 391 meters above mean sea level.

PERIOD OF RECORD: January 16, 1969 to May 31, 1970 and June 1, 1973 to September 30, 

1978.

GAGE: Staff gage from January 16, 1969 to May 31, 1970. Water-stage recorder at same site and 

datum June 1, 1973 to September 30, 1978.

0

0.5

1

1.5

2

2.5

3

3.5

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
310

10-0.000-4M SHIRIN TAGAB RIVER AT DAULATABAD, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 4.97 1970 0.83 1978 1.77 1.59 0.89 5.51

November 7.50 1970 1.31 1975 2.87 2.30 0.80 8.91

December 4.87 1970 1.86 1975 3.19 1.28 0.40 9.93

January 3.58 1974 1.83 1975 2.70 0.75 0.28 8.40

February 4.55 1978 2.77 1969 3.54 0.63 0.18 11.0

March 6.74 1978 2.15 1977 4.74 1.72 0.36 14.8

April 13.5 1969 1.41 1970 5.92 4.73 0.80 18.4

May 7.35 1975 0.54 1970 3.25 2.85 0.88 10.1

June 1.69 1969 0.87 1974 1.18 0.29 0.25 3.65

July 1.62 1969 0.63 1977 1.04 0.37 0.35 3.25

August 1.89 1969 0.67 1978 1.05 0.46 0.44 3.26

September 2.33 1969 0.54 1975 0.91 0.65 0.71 2.84

Annual 3.00 1976 1.72 1977 2.34 0.47 0.20 100
311

10-0.000-4M SHIRIN TAGAB RIVER AT DAULATABAD, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 0.51 1.00 1.56 1.42 2.27 1.12 0.57 0.31 0.33 0.25 0.22 0.25 0.32

90 0.61 1.25 1.75 1.54 2.47 1.92 0.78 0.35 0.36 0.35 0.25 0.28 0.42

85 0.73 1.43 2.03 1.64 2.55 2.54 0.99 0.39 0.46 0.38 0.31 0.33 0.54

80 0.81 1.64 2.17 1.75 2.64 2.68 1.18 0.45 0.62 0.41 0.41 0.41 0.67

75 0.87 1.73 2.28 1.93 2.72 3.03 1.30 0.51 0.70 0.45 0.44 0.47 0.84

70 0.92 1.83 2.32 2.03 2.87 3.37 1.43 0.57 0.89 0.51 0.49 0.50 1.00

65 0.97 1.93 2.35 2.20 2.99 3.55 1.58 0.65 1.03 0.60 0.58 0.52 1.12

60 1.02 2.01 2.39 2.29 3.27 3.73 1.92 0.79 1.09 0.67 0.74 0.56 1.25

55 1.07 2.08 2.52 2.43 3.40 3.91 2.40 1.01 1.15 0.81 0.81 0.61 1.40

50 1.19 2.14 2.65 2.54 3.51 4.09 2.82 1.24 1.22 0.95 0.88 0.65 1.59

45 1.31 2.20 2.78 2.65 3.63 4.30 3.61 1.70 1.30 1.08 0.98 0.72 1.83

40 1.38 2.27 3.11 2.78 3.70 4.53 4.03 2.15 1.34 1.15 1.05 0.79 2.07

35 1.44 2.34 3.25 2.91 3.80 4.83 4.61 2.85 1.38 1.20 1.13 0.84 2.29

30 1.50 2.44 3.40 3.07 3.91 5.20 5.54 3.62 1.45 1.25 1.33 0.93 2.52

25 1.79 2.58 3.56 3.26 4.01 5.52 6.88 4.84 1.55 1.53 1.54 1.03 2.76

20 1.95 2.80 4.00 3.46 4.14 5.93 7.96 5.72 1.65 1.75 1.68 1.19 3.31

15 3.13 6.35 4.37 3.75 4.31 6.76 8.78 6.49 1.71 1.94 1.88 1.50 3.84

10 4.47 7.36 5.07 4.01 4.49 7.80 12.4 7.7 1.81 2.03 2.03 2.44 4.56

5 5.97 8.22 5.60 4.66 5.61 9.67 18.5 9.34 1.99 2.19 2.78 2.77 6.41
312

10-0.000-4M SHIRIN TAGAB RIVER AT DAULATABAD, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge1 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 20.9 10.5 6.23 3.78 1.73

0.95 1.05 28.5 12.5 7.46 4.87 2.69

0.90 1.11 33.8 13.8 8.31 5.60 3.36

0.80 1.25 41.9 15.9 9.60 6.66 4.37

0.50 2 64.9 21.4 13.2 9.42 6.99

0.20 5 104 30.3 19.2 13.6 10.8

0.10 10 135 37.2 23.9 16.6 13.3

0.04 25 179 46.9 30.7 20.6 16.4

0.02 50 217 55.0 36.6 23.8 18.8

0.01 100 258 63.9 43.1 27.1 21.1

0.005 200 304 73.6 50.3 30.6 23.3

0.002 500 372 ng ng ng ng

1

Less than 10 years of data used.

10-0.000-4M SHIRIN TAGAB RIVER AT DAULATABAD, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 0.14 0.16 0.20 0.28 0.30 0.48 0.53 0.55 0.68

0.10 10 0.17 0.19 0.22 0.30 0.33 0.51 0.57 0.59 0.72

0.20 5 0.21 0.22 0.25 0.34 0.37 0.57 0.63 0.66 0.79

0.50 2 0.29 0.30 0.31 0.46 0.53 0.75 0.83 0.88 1.09
313

10-0.000-4M SHIRIN TAGAB RIVER AT DAULATABAD, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 0.91 1.10 1.19 1.36 0.20 0.20 0.21 0.24

0.10 10 1.03 1.24 1.35 1.56 0.24 0.25 0.28 0.36

0.20 5 1.19 1.44 1.55 1.83 0.29 0.34 0.41 0.60

0.50 2 1.57 1.88 2.04 2.43 0.51 0.68 0.95 1.54

June-July-August September-October-November

0.05 20 0.14 0.21 0.31 0.52 0.18 0.25 0.32 0.42

0.10 10 0.16 0.23 0.34 0.58 0.21 0.29 0.34 0.44

0.20 5 0.20 0.26 0.39 0.67 0.26 0.34 0.39 0.50

0.50 2 0.27 0.32 0.52 0.87 0.37 0.50 0.57 0.70

10-0.000-4M SHIRIN TAGAB RIVER AT DAULATABAD, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1969 April 14, 1969 80.0 1977 April 10, 1977 141

1970 March 26, 1970 41.0 1976 April 9, 1976 120

1974 April 7, 1974 63.0 1969 April 14, 1969 80.0

1975 May 4, 1975 49.0 1974 April 7, 1974 63.0

1976 April 9, 1976 120 1975 May 4, 1975 49.0

1977 April 10, 1977 141 1970 March 26, 1970 41.0

1978 December 25, 1977 33.4 1978

December 25, 

1977 33.4
314

10-0.000-4M SHIRIN TAGAB RIVER AT DAULATABAD, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[--, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1969 -- -- -- -- 2.77 6.50 13.5 6.68 1.69 1.62 1.89 2.33 --

1970 4.97 7.50 4.87 3.18 3.60 5.57 1.41 0.54 -- -- -- -- --

1973 -- -- -- -- -- -- -- -- 1.11 1.32 1.27 1.05 --

1974 1.36 1.94 3.16 3.58 4.04 2.98 4.24 1.57 0.87 0.90 0.80 0.55 2.15

1975 0.87 1.31 1.86 1.83 3.63 4.38 5.78 7.35 1.25 0.88 0.69 0.54 2.52

1976 1.14 1.90 2.37 2.20 3.23 4.87 11.4 4.28 1.38 1.27 1.31 0.76 3.00

1977 1.48 2.12 2.26 2.08 2.93 2.15 3.25 1.51 1.04 0.63 0.70 0.61 1.72

1978 0.83 2.43 4.64 3.34 4.55 6.74 1.87 0.83 0.88 0.68 0.67 0.56 2.33
315

10-0.000-6M SHIRIN TAGAB RIVER AT KHISHT PUL

(U.S. Geological Survey identification number: 355700064540000)

LOCATION: Lat 35o57'N., long 64o54'E.

DRAINAGE AREA: 3,280 km2

.

ELEVATION: 769 meters above mean sea level.

PERIOD OF RECORD: January 1, 1966 to September 30, 1978.

GAGE: Water-stage recorder. Staff gage at same site and datum prior to 1969 water year.

0

1

2

3

4

5

6

7

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
316

10-0.000-6M SHIRIN TAGAB RIVER AT KHISHT PUL, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 6.18 1970 2.72 1972 3.96 0.99 0.25 7.55

November 6.46 1970 3.06 1972 4.52 0.97 0.21 8.63

December 6.16 1969 2.23 1972 4.89 1.14 0.23 9.34

January 6.13 1973 3.43 1966 4.78 0.88 0.18 9.13

February 7.11 1973 3.89 1968 5.23 0.94 0.18 9.99

March 12.5 1972 4.98 1976 6.85 2.59 0.38 13.1

April 16.8 1969 4.55 1971 8.49 3.57 0.42 16.2

May 11.1 1972 1.48 1970 5.30 3.11 0.59 10.1

June 5.94 1972 0.92 1966 2.24 1.30 0.58 4.27

July 3.00 1969 0.60 1971 1.88 0.68 0.36 3.60

August 3.50 1969 0.29 1971 1.72 0.83 0.48 3.29

September 4.22 1969 1.08 1971 2.53 0.83 0.33 4.83

Annual 6.04 1969 2.95 1971 4.45 0.79 0.18 100
317

10-0.000-6M SHIRIN TAGAB RIVER AT KHISHT PUL, Continued 

Monthly and annual flow duration, in cubic meters per second 

[ng, not given] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 2.59 3.14 2.28 3.50 3.93 4.23 3.71 0.77 0.69 0.59 0.30 1.16 1.12

90 2.72 3.28 3.63 3.68 4.00 4.43 4.07 1.18 1.03 0.86 0.76 1.33 1.53

85 2.83 3.54 3.85 3.74 4.11 4.57 4.42 1.72 1.12 1.09 0.87 1.52 1.87

80 2.94 3.73 4.16 3.95 4.26 4.71 4.75 1.95 1.20 1.23 1.01 1.69 2.14

75 3.28 3.87 4.29 4.03 4.37 4.84 4.97 2.25 1.29 1.40 1.08 1.82 2.41

70 3.42 4.10 4.42 4.11 4.50 4.96 5.20 2.59 1.39 1.55 1.17 1.93 2.71

65 3.47 4.16 4.55 4.27 4.56 5.09 5.39 2.82 1.50 1.64 1.29 2.09 3.03

60 3.51 4.23 4.68 4.37 4.61 5.21 5.58 3.07 1.66 1.74 1.45 2.21 3.47

55 3.68 4.33 4.79 4.47 4.91 5.53 5.78 3.33 1.90 1.96 1.58 2.39 3.81

50 3.74 4.46 4.88 4.57 5.02 5.73 6.01 3.60 2.04 2.04 1.70 2.57 4.08

45 3.79 4.55 4.96 4.84 5.11 5.83 6.26 4.02 2.17 2.11 1.81 2.71 4.36

40 4.09 4.67 5.05 4.94 5.32 5.92 6.52 4.55 2.28 2.17 1.94 2.83 4.60

35 4.26 4.81 5.22 5.09 5.58 6.02 6.88 4.91 2.39 2.22 2.08 2.99 4.82

30 4.36 4.87 5.41 5.25 5.76 6.12 7.27 5.39 2.53 2.28 2.15 3.13 5.05

25 4.44 4.93 5.55 5.38 5.95 6.29 8.52 6.01 2.67 2.35 2.22 3.23 5.28

20 4.56 5.19 5.68 5.55 6.13 6.56 9.54 6.87 2.82 2.44 2.28 3.33 5.66

15 4.85 5.78 5.81 5.77 6.25 6.97 11.0 7.72 2.97 2.53 2.52 3.51 6.10

10 5.53 6.06 6.26 6.10 6.56 8.23 13.5 8.50 3.16 2.82 3.10 3.71 6.65

5 6.08 ng 6.63 6.41 6.95 19.0 23.8 15.0 4.24 3.09 3.37 4.09 7.92
318

10-0.000-6M SHIRIN TAGAB RIVER AT KHISHT PUL, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 15.2 5.16 4.18 3.64 3.59

0.95 1.05 26.2 8.78 6.27 5.26 4.91

0.90 1.11 34.2 11.4 7.75 6.38 5.78

0.80 1.25 46.0 15.1 9.98 8.03 7.02

0.50 2 75.4 24.5 15.9 12.3 10.1

0.20 5 113 36.3 25.0 18.7 14.3

0.10 10 135 43.1 31.4 23.1 17.0

0.04 25 160 50.7 39.9 28.9 20.5

0.02 50 176 55.6 46.4 33.3 23.1

0.01 100 190 60.0 53.1 37.7 25.6

0.005 200 203 63.9 59.9 42.3 28.1

0.002 500 218 ng ng ng ng

10-0.000-6M SHIRIN TAGAB RIVER AT KHISHT PUL, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 0 0 0.23 0.27 0.35 0.48 0.70 0.79 1.41

0.10 10 0.21 0.26 0.35 0.40 0.51 0.68 0.87 0.98 1.63

0.20 5 0.50 0.56 0.56 0.62 0.77 0.98 1.13 1.24 1.92

0.50 2 1.04 1.09 1.12 1.20 1.41 1.67 1.72 1.86 2.55
319

10-0.000-6M SHIRIN TAGAB RIVER AT KHISHT PUL, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 2.23 2.44 2.47 2.64 0.46 0.6 0.71 1.34

0.10 10 2.69 2.94 3.00 3.14 0.66 0.84 0.99 1.73

0.20 5 3.23 3.53 3.63 3.73 0.98 1.23 1.43 2.32

0.50 2 4.08 4.46 4.63 4.74 1.94 2.34 2.68 3.87

June-July-August September-October-November

0.05 20 0 0.24 0.30 0.39 0.43 0.59 0.78 1.23

0.10 10 0.25 0.38 0.45 0.58 0.63 0.84 1.04 1.49

0.20 5 0.54 0.60 0.69 0.87 0.95 1.21 1.40 1.84

0.50 2 1.09 1.17 1.27 1.53 1.79 2.08 2.21 2.58

10-0.000-6M SHIRIN TAGAB RIVER AT KHISHT PUL, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1967 May 9, 1967 57.9 1977 April 10, 1977 150

1968 April 25, 1968 100 1976 April 8, 1976 140

1969 April 14, 1969 103 1969 April 14, 1969 103

1970 March 25, 1970 50.0 1968 April 25, 1968 100

1971 April 14, 1971 21.3 1972 May 15, 1972 95.0

1972 May 15, 1972 95.0 1974 April 7, 1974 78.7

1973 March 26, 1973 60.6 1973 March 26, 1973 60.6

1974 April 7, 1974 78.7 1975 May 3, 1975 60.0

1975 May 3, 1975 60.0 1967 May 9, 1967 57.9

1976 April 8, 1976 140 1970 March 25, 1970 50.0

1977 April 10, 1977 150 1978 April 26, 1978 43.4

1978 April 26, 1978 43.4 1971 April 14, 1971 21.3
320

10-0.000-6M SHIRIN TAGAB RIVER AT KHISHT PUL, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[Data may not be rounded in accordance with U.S. Geological Survey publication standards; --, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1966 -- -- -- 3.43 4.19 5.31 5.55 2.64 0.92 1.00 1.10 2.58 --

1967 5.24 5.99 5.93 5.79 6.46 6.18 9.42 8.36 1.87 1.57 1.07 1.55 4.94

1968 3.26 4.48 4.47 3.94 3.89 5.31 6.41 5.51 1.60 1.54 1.13 2.06 3.63

1969 3.63 3.78 6.16 5.86 5.94 8.05 16.8 8.82 2.87 3.00 3.50 4.22 6.04

1970 6.18 6.46 5.82 5.19 5.10 6.23 4.79 1.48 1.16 1.25 1.14 2.45 3.93

1971 4.21 4.55 3.85 3.86 4.69 5.13 4.55 1.49 1.22 0.60 0.29 1.08 2.95

1972 2.72 3.06 2.23 3.94 4.21 12.5 8.75 11.1 5.94 2.09 1.59 2.01 5.02

1973 2.73 3.49 5.82 6.13 7.11 12.3 9.96 2.25 2.30 2.22 1.99 3.06 4.93

1974 3.57 4.20 4.76 5.55 5.73 6.20 8.64 4.16 2.03 2.37 1.81 2.63 4.29

1975 3.53 4.00 4.30 4.30 5.03 5.28 10.8 8.41 1.27 2.03 2.39 3.25 4.54

1976 4.19 4.57 4.63 4.66 4.60 4.98 12.9 6.37 2.31 2.22 2.25 2.91 4.71

1977 4.19 4.78 4.83 5.03 5.67 6.17 6.17 4.48 3.02 2.72 2.60 3.20 4.40

1978 4.04 4.92 5.93 4.51 5.43 5.40 5.66 3.87 2.56 1.89 1.56 1.90 3.96
321

10-1.1L0-7A QAISAR RIVER AT QAISAR

(U.S. Geological Survey identification number: 354200064180000)

LOCATION: Lat 35o42'N., long 64o18'E.

DRAINAGE AREA: 425 km2.

ELEVATION: 1,312 meters above mean sea level.

PERIOD OF RECORD: March 30, 1969 to September 30, 1978.

GAGE: Water-stage recorder.

0

0.2

0.4

0.6

0.8

1

1.2

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
322

10-1.1L0-7A QAISAR RIVER AT QAISAR, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 0.01 1975 0 1970 0 0 1.66 0.02

November 0.13 1978 0 1972 0.02 0.04 1.89 0.31

December 0.59 1978 0 1970 0.08 0.19 2.40 1.10

January 0.03 1974 0 1970 0.01 0.01 1.29 0.10

February 0.87 1975 0 1970 0.13 0.29 2.20 1.77

March 4.44 1972 0.02 1971 1.30 1.51 1.16 17.8

April 7.30 1969 0.33 1977 3.79 2.06 0.55 51.7

May 5.57 1969 0.02 1977 1.90 2.03 1.07 25.9

June 0.51 1972 0 1970 0.08 0.16 1.89 1.13

July 0.02 1975 0 1969 0 0.01 1.89 0.05

August 0.01 1976 0 1969 0 0 1.69 0.02

September 0.02 1978 0 1970 0 0.01 1.66 0.06

Annual 1.10 1972 0.03 1977 0.54 0.35 0.65 100
323

10-1.1L0-7A QAISAR RIVER AT QAISAR, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 0 0 0 0 0 0 0.05 0 0 0 0 0 0

90 0 0 0 0 0 0 0.27 0 0 0 0 0 0

85 0 0 0 0 0 0 0.50 0.01 0 0 0 0 0

80 0 0 0 0 0 0 1.38 0.02 0 0 0 0 0

75 0 0 0 0 0 0.01 1.68 0.04 0 0 0 0 0

70 0 0 0 0 0 0.02 1.87 0.05 0 0 0 0 0

65 0 0 0 0 0 0.02 2.07 0.11 0 0 0 0 0

60 0 0 0 0 0 0.06 2.33 0.18 0 0 0 0 0

55 0 0 0 0 0 0.19 2.60 0.23 0 0 0 0 0

50 0 0 0 0 0 0.35 3.02 0.41 0 0 0 0 0

45 0 0 0 0 0 0.38 3.83 0.76 0 0 0 0 0

40 0 0 0 0 0 0.41 4.36 1.23 0 0 0 0 0

35 0 0 0 0 0 0.50 4.80 2.05 0.01 0 0 0 0.01

30 0 0 0.01 0 0.01 0.93 5.24 2.39 0.02 0 0 0 0.02

25 0 0 0.01 0 0.02 1.22 5.67 3.27 0.02 0 0 0 0.04

20 0 0 0.02 0.01 0.04 1.65 6.09 3.97 0.04 0 0 0 0.14

15 0 0.01 0.03 0.02 0.06 2.19 6.89 5.02 0.10 0 0 0.01 0.51

10 0 0.04 0.05 0.04 0.45 3.99 7.83 6.02 0.29 0.02 0 0.02 1.96

5 0.02 0.06 0.07 0.05 1 6.22 9.52 7.07 0.43 0.03 0.01 0.05 4.20
324

10-1.1L0-7A QAISAR RIVER AT QAISAR, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 3.20 1.10 0.49 0.25 0.13

0.95 1.05 4.40 1.99 1.22 0.80 0.51

0.90 1.11 5.20 2.68 1.85 1.34 0.93

0.80 1.25 6.50 3.78 2.92 2.30 1.73

0.50 2 10.0 6.93 5.98 4.96 4.10

0.20 5 15.7 12.0 10.2 7.98 6.71

0.10 10 20.0 15.5 12.5 9.31 7.74

0.04 25 26.0 20.2 15.0 10.4 8.48

0.02 50 31.0 23.6 16.5 10.9 8.77

0.01 100 36.4 27.1 17.7 11.2 8.95

0.005 200 42.2 30.6 18.7 11.4 9.05

0.002 500 50.6 ng ng ng ng

10-1.1L0-7A QAISAR RIVER AT QAISAR, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second; ng, not given] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 ng ng ng ng ng ng 0 0 0

0.10 10 ng ng ng ng ng ng 0 0 0

0.20 5 ng ng ng ng ng ng 0 0 0

0.50 2 ng ng ng ng ng ng 0 0 0
325

10-1.1L0-7A QAISAR RIVER AT QAISAR, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second; ng, not given] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 

December-JanuaryFebruary March-April-May

0.05 20 0 0 0 0 0 0 0 0.01

0.10 10 0 0 0 0 0 0 0 0.02

0.20 5 0 0 0 0 0 0 0 0.05

0.50 2 0 0 0 0 0 0.01 0.02 0.28

June-July-August September-October-November

0.05 20 ng ng ng ng ng ng ng ng

0.10 10 ng ng ng ng ng ng ng ng

0.20 5 ng ng ng ng ng ng ng ng

0.50 2 ng ng ng ng ng ng ng ng

10-1.1L0-7A QAISAR RIVER AT QAISAR, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1969 April 14, 1969 11.2 1976 May 11, 1976 25.0

1970 March 25, 1970 10.5 1972 March 27, 1972 20.0

1971 April 14, 1971 9.08 1978 April 12, 1978 12.0

1972 March 27, 1972 20.0 1969 April 14, 1969 11.2

1973 April 7, 1973 7.00 1970 March 25, 1970 10.5

1974 May 2, 1974 7.40 1971 April 14, 1971 9.08

1975 April 19, 1975 8.58 1975 April 19, 1975 8.58

1976 May 11, 1976 25.0 1974 May 2, 1974 7.40

1977 April 9, 1977 4.00 1973 April 7, 1973 7.00

1978 April 12, 1978 12.0 1977 April 9, 1977 4.00
326

10-1.1L0-7A QAISAR RIVER AT QAISAR, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[--, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1969 -- -- -- -- -- -- 7.30 5.57 0.07 0 0 0 --

1970 0 0.05 0 0 0 0.79 2.71 0.03 0 0.01 0 0 0.30

1971 0 0.02 0.01 0.01 0.01 0.02 1.74 0.51 0 0 0 0.01 0.19

1972 0 0 0.01 0 0 4.44 5.75 2.53 0.51 0 0 0 1.10

1973 0 0 0 0 0.04 1.16 4.37 1.61 0 0 0 0 0.60

1974 0 0 0.01 0.03 0.01 0.67 2.22 0.81 0.10 0 0 0.01 0.32

1975 0.01 0 0.10 0.01 0.87 1.11 4.31 1.97 0.01 0.02 0 0 0.70

1976 0 0 0 0.01 0.02 0.31 4.03 5.29 0.14 0.01 0.01 0.01 0.82

1977 0.01 0 0.01 0 0.01 0.05 0.33 0.02 0 0 0 0 0.03

1978 0 0.13 0.59 0.01 0.21 3.15 5.12 0.66 0 0 0.01 0.02 0.83
327

10-1.L00-1T MAIMANA RIVER NEAR PATA BABA

(U.S. Geological Survey identification number: 363200064530000)

LOCATION: Lat 36o32'N., long 64o53'E.

DRAINAGE AREA: 6,685 km2.

ELEVATION: 381 meters above mean sea level.

PERIOD OF RECORD: November 11, 1967 to September 30, 1972

GAGE: Water-stage recorder. Staff gage prior to 1970 water year.

0

1

2

3

4

5

6

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
328

10-1.L00-1T MAIMANA RIVER NEAR PATA BABA, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 0.71 1970 0.06 1972 0.32 0.28 0.87 1.26

November 1.30 1970 0.23 1972 0.51 0.52 1.02 2.01

December 2.33 1969 0.16 1968 0.80 0.91 1.15 3.12

January 1.50 1969 0.13 1968 0.68 0.52 0.77 2.66

February 5.38 1972 0.30 1968 2.08 2.34 1.12 8.13

March 9.74 1972 0.53 1971 4.29 4.31 1.00 16.8

April 28.0 1969 0.62 1971 9.05 11.5 1.27 35.4

May 16.9 1969 0.01 1971 6.27 7.24 1.15 24.6

June 3.45 1972 0 1971 1.07 1.51 1.41 4.19

July 0.47 1972 0 1970 0.13 0.20 1.56 0.50

August 0.45 1972 0 1970 0.13 0.20 1.50 0.52

September 0.48 1969 0 1971 0.21 0.23 1.11 0.81

Annual 5.29 1969 0.25 1971 2.44 2.39 0.98 100
329

10-1.L00-1T MAIMANA RIVER NEAR PATA BABA, Continued 

Monthly and annual flow duration, in cubic meters per second 

[ng, not given] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 0.01 0.19 0.01 0 0.18 0.10 0.07 0 0 0 0 0 0

90 0.03 0.21 0.05 0 0.21 0.14 0.13 0.01 0 0 0 0 0

85 0.08 0.22 0.10 0.02 0.29 0.17 0.20 0.01 0 0 0 0 0

80 0.11 0.23 0.13 0.10 0.39 0.24 0.22 0.02 0 0 0 0 0.02

75 0.13 0.23 0.16 0.22 0.43 0.36 0.31 0.02 0 0 0 0 0.10

70 0.17 0.24 0.19 0.25 0.46 0.42 0.39 0.05 0.03 0 0 0 0.18

65 0.21 0.25 0.22 0.30 0.49 0.50 0.51 0.09 0.04 0 0 0.01 0.22

60 0.22 0.25 0.25 0.35 0.53 0.64 0.75 0.45 0.06 0 0 0.02 0.27

55 0.23 0.26 0.28 0.37 0.56 0.73 1.04 1.29 0.11 0 0 0.10 0.32

50 0.24 0.26 0.34 0.39 0.60 0.85 1.71 1.90 0.15 0.02 0 0.13 0.37

45 0.25 0.27 0.39 0.44 0.67 1.37 2.76 3.70 0.19 0.02 0 0.17 0.43

40 0.29 0.31 0.44 0.52 0.76 2.27 5.88 4.97 0.23 0.03 0.01 0.24 0.48

35 0.31 0.33 0.50 0.58 0.95 4.00 7.20 6.06 0.45 0.04 0.14 0.34 0.57

30 0.33 0.35 0.63 0.65 2.59 5.07 9.05 7.53 0.66 0.12 0.26 0.41 0.71

25 0.37 0.37 0.70 0.71 3.71 6.12 10.6 9.64 1.01 0.29 0.30 0.43 1.00

20 0.54 1.04 0.84 0.85 4.36 7.53 13.2 12.5 1.20 0.41 ng 0.45 1.60

15 0.63 1.14 1.12 1.04 5.47 8.97 18.9 14.1 1.94 0.46 ng 0.48 4.13

10 0.67 1.39 1.63 1.21 6.00 12.0 30.1 15.7 3.29 0.49 ng 0.51 6.64

5 1.03 1.56 3.80 1.48 6.53 16.2 48.7 28.0 5.50 ng ng 0.65 12.9
330

10-1.L00-1T MAIMANA RIVER NEAR PATA BABA, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge1 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 ng 0.77 0.38 0.13 0.08

0.95 1.05 ng 2.62 1.20 0.50 0.34

0.90 1.11 ng 4.64 2.12 1.01 0.71

0.80 1.25 ng 8.65 4.09 2.23 1.60

0.50 2 40.1 23.1 13.1 9.01 6.70

0.20 5 60.8 48.2 37.3 31.1 23.4

0.10 10 70.7 64.8 61.5 55.9 42.0

0.04 25 79.4 2

83.6 101 100 74.6

0.02 50 84.0 2

95.6 2137 142 105

0.01 100 87.3 2

106 2179 193 141

0.005 200 89.8 2

115 2225 251 182

0.002 500 92.1 ng ng ng ng

1

Less than 10 years of data used.

2

Data does not fit log-Pearson Type III curve, use with caution.

10-1.L00-1T MAIMANA RIVER NEAR PATA BABA, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second; ng, not given] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 ng ng ng ng ng ng ng ng ng

0.10 10 ng ng ng ng ng ng ng ng ng

0.20 5 ng ng ng ng ng ng ng ng ng

0.50 2 ng ng ng ng ng ng ng ng ng
331

10-1.L00-1T MAIMANA RIVER NEAR PATA BABA, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second; ng,not given] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 0 0 0 0 0 0 0 0

0.10 10 0 0 0 0.01 0 0 0 0.01

0.20 5 0 0 0.01 0.03 0 0 0.02 0.03

0.50 2 0.07 0 0.13 0.27 0.02 0.14 0.20 0.50

June-July-August September-October-November

0.05 20 ng ng ng ng ng ng ng ng

0.10 10 ng ng ng ng ng ng ng ng

0.20 5 ng ng ng ng ng ng ng ng

0.50 2 ng ng ng ng ng ng ng ng

10-1.L00-1T MAIMANA RIVER NEAR PATA BABA, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1968 April 27, 1968 31.0 1969 April 14, 1969 60.0

1969 April 14, 1969 60.0 1972 March 19, 1972 60.0

1970 April 15, 1970 38.8 1970 April 15, 1970 38.8

1971 April 16, 1971 12.0 1968 April 27, 1968 31.0

1972 March 19, 1972 60.0 1971 April 16, 1971 12.0
332

10-1.L00-1T MAIMANA RIVER NEAR PATA BABA, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[--, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1968 -- -- 0.16 0.13 0.30 0.73 3.51 4.30 0.16 0.04 0 0.08 --

1969 0.25 0.24 2.33 1.50 3.73 8.08 28.0 16.9 1.71 0.13 0.22 0.48 5.29

1970 0.71 1.30 0.95 0.82 0.48 2.40 1.50 0.04 0.03 0 0 0.04 0.69

1971 0.27 0.28 0.37 0.39 0.50 0.53 0.62 0.01 0 0 0 0 0.25

1972 0.06 0.23 0.18 0.58 5.38 9.74 11.6 10.1 3.45 0.47 0.45 0.43 3.54
333

11-0.000-4M SARE PUL RIVER AT ASIABAD

(U.S. Geological Survey identification number: 361200065570000)

LOCATION: Lat 36o12'N., long 65o57'E.

DRAINAGE AREA: 6,950 km2

.

ELEVATION: 642 meters above mean sea level.

PERIOD OF RECORD: October 1, 1964 to September 30, 1978.

GAGE: Water-stage recorder. Staff gage at same site and datum prior to 1970 water year.

0

2

4

6

8

10

12

14

16

18

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
334

11-0.000-4M SARE PUL RIVER AT ASIABAD, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 13.1 1970 4.74 1972 7.21 2.23 0.31 7.60

November 11.7 1970 5.38 1973 7.70 1.75 0.23 8.12

December 10.3 1976 5.11 1973 7.36 1.75 0.24 7.76

January 9.41 1976 5.73 1973 7.01 1.29 0.18 7.39

February 9.81 1976 5.80 1968 7.59 1.26 0.17 8.00

March 15.7 1969 6.29 1967 9.31 2.53 0.27 9.81

April 31.1 1969 6.36 1966 12.2 7.06 0.58 12.9

May 29.9 1969 3.77 1971 12.5 8.19 0.66 13.2

June 23.6 1969 3.14 1977 7.91 5.62 0.71 8.34

July 15.6 1969 2.27 1977 5.52 3.53 0.64 5.82

August 12.1 1969 2.19 1977 4.90 2.71 0.55 5.16

September 12.4 1969 3.27 1966 5.65 2.56 0.45 5.95

Annual 15.3 1969 5.57 1974 7.90 2.74 0.35 100
335

11-0.000-4M SARE PUL RIVER AT ASIABAD, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 4.25 5.23 4.73 5.23 5.68 6.06 5.28 3.42 2.51 2.11 1.93 2.56 2.80

90 4.82 5.69 5.26 5.54 5.88 6.36 5.64 4.22 2.88 2.43 2.28 3.01 3.63

85 5.30 5.94 5.51 5.70 6.08 6.63 5.91 4.93 3.38 2.59 2.47 3.32 4.21

80 5.49 6.13 5.69 5.80 6.23 6.87 6.15 5.22 3.63 2.92 2.72 3.51 4.79

75 5.68 6.40 5.96 5.92 6.36 7.09 6.40 5.53 3.89 3.23 2.97 3.81 5.24

70 5.87 6.59 6.24 6.05 6.57 7.30 6.73 6.22 4.23 3.55 3.18 3.97 5.60

65 6.01 6.78 6.47 6.12 6.77 7.51 7.09 6.76 4.63 3.79 3.40 4.19 5.95

60 6.17 7.04 6.68 6.20 6.93 7.73 7.67 7.54 5.02 4.00 3.66 4.41 6.26

55 6.39 7.37 6.88 6.29 7.10 7.95 8.24 8.17 5.62 4.21 3.80 4.69 6.56

50 6.77 7.52 7.13 6.46 7.25 8.17 8.79 8.84 6.05 4.42 3.91 4.94 6.86

45 7.11 7.70 7.35 6.82 7.37 8.39 9.33 9.79 6.80 4.79 4.20 5.13 7.21

40 7.40 7.86 7.55 7.13 7.57 8.69 9.98 10.7 7.48 5.08 4.73 5.82 7.56

35 7.66 7.98 7.71 7.45 8.02 9.05 10.8 11.9 8.13 5.35 5.05 6.10 7.94

30 7.97 8.09 7.87 7.68 8.54 9.70 12.1 13.0 9.19 5.64 5.33 6.45 8.39

25 8.32 8.45 8.21 7.85 8.84 10.1 13.5 14.6 9.95 6.33 5.92 7.03 8.83

20 8.63 8.78 8.76 8.45 9.06 10.4 14.6 17.8 10.9 7.34 6.65 7.45 9.60

15 9.11 10.1 9.67 9.01 9.27 10.9 16.3 21.9 12.7 8.25 8.33 8.42 10.5

10 10.1 10.5 10.4 9.24 9.64 12.8 22.0 25.3 15.9 10.6 9.06 8.97 12.1

5 12.7 11.1 10.8 9.44 10.2 16.1 30.4 30.9 20.7 14.6 11.7 12.0 15.8
336

11-0.000-4M SARE PUL RIVER AT ASIABAD, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 5.00 15.20 15.08 15.36 5.73

0.95 1.05 11.3 8.28 7.33 7.04 6.98

0.90 1.11 17.0 10.6 8.99 8.25 7.89

0.80 1.25 27.6 14.5 11.6 10.1 9.29

0.50 2 64.9 26.2 19.3 15.7 13.4

0.20 5 141 47.8 33.3 25.9 20.7

0.10 10 205 65.8 44.7 34.5 26.8

0.04 25 300 92.8 62.0 47.7 36.2

0.02 50 378 116 77.0 59.4 44.5

0.01 100 462 142 93.9 73.0 54.0

0.005 200 552 171 113 88.6 65.1

0.002 500 679 ng ng ng ng

1

Data does not fit log-Pearson Type III curve, use with caution.

11-0.000-4M SARE PUL RIVER AT ASIABAD, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 1.34 1.52 1.60 2.05 2.15 2.23 2.38 2.57 3.26

0.10 10 1.54 1.70 1.79 2.31 2.43 2.55 2.72 2.93 3.62

0.20 5 1.86 2.00 2.10 2.70 2.85 3.01 3.22 3.46 4.14

0.50 2 2.81 2.91 3.03 3.81 4.01 4.27 4.55 4.84 5.50
337

11-0.000-4M SARE PUL RIVER AT ASIABAD, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 3.77 4.03 4.50 4.97 2.34 2.79 3.44 3.98

0.10 10 4.16 4.40 4.81 5.22 2.80 3.22 3.90 4.51

0.20 5 4.68 4.90 5.23 5.57 3.45 3.85 4.56 5.26

0.50 2 5.86 6.04 6.24 6.46 4.99 5.50 6.22 7.15

June-July-August September-October-November

0.05 20 1.40 1.71 2.14 2.24 1.68 2.12 2.59 3.02

0.10 10 1.55 1.85 2.34 2.46 1.94 2.37 2.90 3.33

0.20 5 1.82 2.09 2.66 2.82 2.33 2.75 3.36 3.80

0.50 2 2.69 2.92 3.69 3.91 3.49 3.89 4.64 5.10

11-0.000-4M SARE PUL RIVER AT ASIABAD, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1965 May 6, 1965 24.5 1976 April 28, 1976 220

1966 March 22, 1966 15.0 1977 May 29, 1977 195

1967 May 1, 1967 97.2 1972 March 27, 1972 170

1968 November 27, 1967 58.0 1975 April 22, 1975 150

1969 March 29, 1969 95.0 1967 May 1, 1967 97.2

1970 March 8, 1970 30.0 1978 April 26, 1978 97.0

1971 April 15, 1971 23.9 1969 March 29, 1969 95.0

1972 March 27, 1972 170 1973 March 25, 1973 60.4

1973 March 25, 1973 60.4 1968

November 27, 

1967 58.0

1974 May 3, 1974 11.8 1970 March 8, 1970 30.0

1975 April 22, 1975 150 1965 May 6, 1965 24.5

1976 April 28, 1976 220 1971 April 15, 1971 23.9

1977 May 29, 1977 195 1966 March 22, 1966 15.0

1978 April 26, 1978 97.0 1974 May 3, 1974 11.8
338

11-0.000-4M SARE PUL RIVER AT ASIABAD, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[Data may not be rounded in accordance with U.S. Geological Survey publication standards] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1965 6.96 7.62 7.56 7.43 8.08 9.37 8.87 9.96 6.67 4.71 4.35 5.88 7.28

1966 7.82 7.39 6.64 5.93 7.73 9.31 6.36 4.70 3.33 2.95 2.81 3.27 5.68

1967 5.20 6.05 5.57 5.90 6.00 6.29 7.52 15.4 7.49 4.97 4.20 4.48 6.59

1968 5.76 7.09 5.57 5.83 5.80 7.25 9.76 12.5 9.79 6.38 5.84 6.58 7.34

1969 7.98 8.39 9.75 7.81 8.55 15.7 31.1 29.9 23.6 15.6 12.1 12.4 15.3

1970 13.1 11.7 10.2 9.31 9.55 11.3 11.0 7.27 4.72 4.63 4.43 5.41 8.55

1971 7.53 7.90 7.97 7.33 7.30 6.83 7.16 3.77 3.16 2.90 3.05 3.59 5.70

1972 4.74 5.51 5.58 6.19 7.13 11.1 7.91 14.3 7.60 3.89 3.38 3.91 6.77

1973 5.41 5.38 5.11 5.73 6.75 11.1 14.5 10.6 7.31 4.45 4.14 5.63 7.17

1974 6.23 6.53 6.36 6.05 6.65 7.06 6.67 6.58 4.21 3.45 3.21 3.94 5.57

1975 6.02 7.05 6.72 5.97 7.55 8.93 20.6 28.6 15.1 9.96 8.15 8.37 11.1

1976 9.67 10.3 10.3 9.41 9.81 10.7 19.3 17.5 10.1 7.38 7.60 8.17 10.8

1977 8.80 8.76 7.73 8.26 8.88 7.80 12.4 6.39 3.14 2.27 2.19 3.61 6.67

1978 5.74 8.17 8.01 6.96 6.44 7.56 8.14 7.45 4.51 3.81 3.15 3.83 6.15
339

11-1.R00-1A SHORAB RIVER NEAR SARE PUL

(U.S. Geological Survey identification number: 361100066020000)

LOCATION: Lat 36o11'N., long 66o02'E.

DRAINAGE AREA: 3,700 km2

.

ELEVATION: 703 meters above mean sea level.

PERIOD OF RECORD: November 24, 1969 to September 30, 1978.

GAGE: Water-stage recorder.

0

0.5

1

1.5

2

2.5

3

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
340

11-1.R00-1A SHORAB RIVER NEAR SARE PUL, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 3.11 1976 1.77 1975 2.28 0.53 0.23 9.87

November 4.05 1978 2.24 1973 2.81 0.74 0.26 12.1

December 3.31 1976 2.08 1972 2.60 0.49 0.19 11.3

January 3.04 1977 1.67 1973 2.31 0.38 0.17 9.99

February 3.74 1971 2.01 1973 2.70 0.54 0.20 11.7

March 4.28 1970 2.37 1974 3.30 0.71 0.22 14.3

April 6.54 1976 1.40 1974 3.39 1.51 0.45 14.6

May 6.11 1975 0.56 1971 2.30 2.21 0.96 9.94

June 0.95 1972 0.08 1974 0.26 0.27 1.05 1.11

July 0.39 1973 0.01 1972 0.10 0.13 1.21 0.45

August 0.58 1973 0.03 1977 0.25 0.18 0.72 1.09

September 1.46 1975 0.31 1974 0.82 0.43 0.53 3.56

Annual 2.82 1976 1.35 1974 1.93 0.44 0.23 100
341

11-1.R00-1A SHORAB RIVER NEAR SARE PUL, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 1.31 2.11 1.85 1.70 1.85 1.96 0.72 0.03 0.01 0.01 0.01 0.02 0.02

90 1.51 2.22 2.03 1.89 2.01 2.06 1.25 0.05 0.02 0.01 0.02 0.05 0.03

85 1.75 2.25 2.12 1.94 2.08 2.14 1.54 0.14 0.02 0.02 0.02 0.14 0.04

80 1.87 2.28 2.18 1.99 2.13 2.26 1.77 0.24 0.02 0.02 0.02 0.18 0.16

75 1.92 2.30 2.22 2.03 2.19 2.46 1.98 0.36 0.03 0.02 0.03 0.27 0.39

70 1.96 2.33 2.26 2.08 2.25 2.62 2.12 0.45 0.03 0.02 0.03 0.37 0.65

65 1.99 2.35 2.29 2.13 2.30 2.72 2.31 0.60 0.03 0.02 0.04 0.49 1.14

60 2.02 2.37 2.32 2.17 2.35 2.86 2.57 0.82 0.04 0.03 0.04 0.60 1.61

55 2.05 2.39 2.35 2.21 2.42 3.01 2.81 1.08 0.04 0.03 0.07 0.74 1.93

50 2.11 2.41 2.41 2.26 2.49 3.19 2.97 1.32 0.08 0.03 0.13 0.82 2.05

45 2.19 2.54 2.52 2.31 2.62 3.28 3.16 1.56 0.11 0.03 0.16 0.92 2.17

40 2.30 2.63 2.60 2.38 2.80 3.35 3.42 1.8 0.13 0.04 0.19 1.03 2.29

35 2.42 2.73 2.69 2.44 2.90 3.46 3.56 2.33 0.15 0.04 0.27 1.20 2.42

30 2.52 2.83 2.79 2.50 3.00 3.62 3.70 2.72 0.17 0.05 0.32 1.27 2.61

25 2.60 3.23 2.90 2.57 3.18 3.77 3.91 3.46 0.24 0.13 0.43 1.34 2.80

20 2.71 3.41 3.11 2.65 3.33 3.89 4.31 4.15 0.30 0.20 0.52 1.42 2.98

15 2.91 3.81 3.25 2.75 3.44 4.25 4.99 4.89 0.42 0.29 0.61 1.50 3.30

10 3.16 3.93 3.39 2.96 3.70 4.68 5.64 5.72 0.64 0.37 0.70 1.59 3.68

5 3.73 4.16 3.61 3.35 3.90 5.83 6.40 7.05 1.50 0.47 0.92 1.76 4.53
342

11-1.R00-1A SHORAB RIVER NEAR SARE PUL, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge1 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 3.60 2.10 2.02 2.01 22.02

0.95 1.05 5.50 2.67 2.57 2.52 2.47

0.90 1.11 7.00 3.12 2.98 2.87 2.77

0.80 1.25 9.50 3.89 3.64 3.39 3.21

0.50 2 17.9 6.54 5.64 4.77 4.34

0.20 5 35.3 12.7 9.51 6.94 6.06

0.10 10 51.5 19.1 12.9 8.57 7.31

0.04 25 78.4 31.1 18.5 10.9 9.02

0.02 50 104 43.7 23.6 12.7 10.4

0.01 100 134 60.5 29.8 14.7 11.8

0.005 200 171 82.7 37.2 16.9 13.4

0.002 500 231 ng ng ng ng

1

Less than 10 years of data used.

2

Data does not fit log-Pearson Type III curve, use with caution.

11-1.R00-1A SHORAB RIVER NEAR SARE PUL, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 0.01 0.01 0.01 0.01 0.01 0.01 0.03 0.13 0.44

0.10 10 0.01 0.01 0.01 0.01 0.01 0.02 0.04 0.15 0.49

0.20 5 0.01 0.01 0.01 0.01 0.02 0.02 0.06 0.18 0.58

0.50 2 0.01 0.01 0.01 0.03 0.03 0.05 0.14 0.26 0.79
343

11-1.R00-1A SHORAB RIVER NEAR SARE PUL, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 0.72 0.88 0.98 1.59 0.01 0.02 0.04 0.30

0.10 10 0.98 1.15 1.25 1.74 0.01 0.03 0.07 0.42

0.20 5 1.33 1.49 1.59 1.92 0.02 0.06 0.15 0.62

0.50 2 1.90 2.03 2.10 2.19 0.12 0.25 0.58 1.26

June-July-August September-October-November

0.05 20 0.01 0.01 0.01 0.01 0 0.02 0.05 0.29

0.10 10 0.01 0.01 0.01 0.01 0.01 0.03 0.08 0.37

0.20 5 0.01 0.01 0.01 0.02 0.01 0.05 0.14 0.49

0.50 2 0.01 0.01 0.02 0.03 0.06 0.19 0.40 0.80

11-1.R00-1A SHORAB RIVER NEAR SARE PUL, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1970 April 13, 1970 16.2 1976 April 28, 1976 66.0

1971 April 15, 1971 10.5 1975 May 4, 1975 53.0

1972 May 16, 1972 23.0 1972 May 16, 1972 23.0

1973 April 14, 1973 16.2 1977 May 29, 1977 16.4

1974 April 1, 1974 5.1 1970 April 13, 1970 16.2

1975 May 4, 1975 53.0 1973 April 14, 1973 16.2

1976 April 28, 1976 66.0 1978 April 26, 1978 14.0

1977 May 29, 1977 16.4 1971 April 15, 1971 10.5

1978 April 26, 1978 14.0 1974 April 1, 1974 5.1
344

11-1.R00-1A SHORAB RIVER NEAR SARE PUL, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[Data may not be rounded in accordance with U.S. Geological Survey publication standards; --, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1970 -- -- 3.15 2.38 2.51 4.28 2.99 0.80 0.15 0.16 0.13 0.94 --

1971 2.25 2.34 2.29 2.42 3.74 2.85 2.58 0.56 0.12 0.04 0.38 0.72 1.68

1972 1.84 2.30 2.08 2.37 2.71 3.81 3.50 2.66 0.95 0.01 0.08 0.45 1.89

1973 1.97 2.24 2.14 1.67 2.01 3.18 3.97 1.15 0.30 0.39 0.58 1.44 1.75

1974 2.03 2.33 2.25 1.97 2.18 2.37 1.40 0.96 0.08 0.20 0.16 0.31 1.35

1975 1.77 2.45 2.43 2.06 2.53 2.71 4.52 6.11 0.20 0.02 0.41 1.46 2.22

1976 3.11 3.89 3.31 2.44 2.86 4.14 6.54 5.95 0.12 0.03 0.33 1.08 2.82

1977 2.20 2.86 2.55 3.04 3.32 2.58 2.14 0.76 0.29 0.02 0.03 0.57 1.69

1978 3.08 4.05 3.24 2.43 2.43 3.76 2.83 1.74 0.09 0.05 0.17 0.42 2.02
345

12-0.000-1M BALKH RIVER AT RABAT-I-BALA

(U.S. Geological Survey identification number: 363500066580000)

LOCATION: Lat 36o35'N., long 66o58'E.

DRAINAGE AREA: 18,035 km2

.

ELEVATION: 432 meters above mean sea level.

PERIOD OF RECORD: April 1, 1964 to September 30, 1978.

GAGE: Water-stage recorder. Staff gage at same site and datum prior to 1968 water year.

0

10

20

30

40

50

60

70

80

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
346

12-0.000-1M BALKH RIVER AT RABAT-I-BALA, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 51.1 1970 22.7 1978 36.6 7.91 0.22 6.17

November 53.5 1970 26.0 1978 36.9 7.66 0.21 6.23

December 47.3 1966 27.1 1978 35.8 6.47 0.18 6.04

January 47.3 1966 25.5 1973 34.5 5.91 0.17 5.83

February 48.2 1966 27.9 1975 34.8 5.47 0.16 5.86

March 55.9 1966 28.9 1971 39.6 7.53 0.19 6.67

April 104 1969 42.1 1971 59.4 15.3 0.26 10.02

May 150 1976 52.4 1971 101 31.1 0.31 17.07

June 169 1969 29.9 1971 95.3 39.5 0.41 16.07

July 104 1969 19.8 1971 47.7 20.1 0.42 8.05

August 65.0 1969 19.8 1971 35.8 10.7 0.30 6.04

September 55.4 1969 20.8 1971 35.3 8.15 0.23 5.95

Annual 74.7 1969 31.8 1971 49.2 10.7 0.22 100
347

12-0.000-1M BALKH RIVER AT RABAT-I-BALA, Continued 

Monthly and annual flow duration, in cubic meters per second 

[ng, not given] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 23.1 24.2 26.7 26.3 27.5 28.7 35.6 46.7 31.4 21.4 20.2 22.0 24.4

90 24.0 27.0 27.4 27.3 28.1 30.9 37.9 54.9 37.0 25.3 23.0 24.8 28.0

85 29.0 29.2 28.3 27.9 28.7 32.2 40.3 59.9 44.2 28.8 24.6 28.2 29.5

80 30.9 30.2 28.9 29.4 29.8 33.3 42.9 64.4 51.8 31.4 28.2 29.9 31.1

75 32.0 31.5 29.6 30.1 30.3 33.8 44.7 69.9 58.8 33.5 28.9 30.7 32.8

70 33.0 32.4 32.0 31.9 30.7 34.5 45.7 75.1 63.9 35.5 31.2 31.5 34.0

65 33.7 33.2 33.0 32.5 31.8 35.3 46.7 78.4 70.0 37.7 32.4 32.3 35.2

60 34.3 34.3 34.5 33.0 32.4 36.2 48.0 81.2 76.7 39.9 33.2 33.0 36.3

55 35.0 36.0 35.4 33.6 33.3 37.0 49.8 85.2 82.3 42.1 33.8 33.8 37.4

50 37.2 36.8 35.9 34.4 34.1 37.7 51.7 94.3 87.7 44.0 34.6 35.5 38.5

45 39.6 38.8 36.6 35.0 35.6 38.1 53.7 102 94.6 45.8 35.6 36.4 39.6

40 39.9 39.6 37.3 35.5 36.3 38.5 55.5 106 104 47.7 37.3 37.1 41.6

35 40.2 40.1 37.8 36.5 36.8 39.5 57.4 116 114 49.7 38.1 37.7 43.7

30 40.6 40.7 39.0 36.9 37.3 41.1 60.1 124 119 52.1 38.8 38.4 46.3

25 41.1 41.3 40.1 37.5 38.0 42.3 63.7 131 129 55.1 40.0 39.1 50.3

20 41.6 41.9 41.5 38.4 38.8 45.8 69.6 138 141 58.0 42.3 39.8 56.1

15 44.2 44.8 43.4 39.5 39.7 49.7 78.2 144 148 65.4 43.5 41.6 67.5

10 45.7 46.7 46.5 43.5 40.8 53.1 90.9 153 156 76.2 45.1 43.4 87.3

5 50.8 51.3 47.1 ng 47.3 57.8 113 169 178 90.8 60.5 55.2 125
348

12-0.000-1M BALKH RIVER AT RABAT-I-BALA, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 39.1 46.4 44.3 43.1 38.9

0.95 1.05 68.8 66.9 65.7 62.1 55.7

0.90 1.11 91.6 80.5 79.3 74.1 66.4

0.80 1.25 128 99.7 97.6 90.3 81.0

0.50 2 231 147 137 126 114

0.20 5 397 208 180 165 152

0.10 10 516 247 201 186 173

0.04 25 673 293 223 209 197

0.02 50 791 326 237 223 212

0.01 100 911 357 248 235 226

0.005 200 1,030 387 258 246 238

0.002 500 1,190 ng ng ng ng

12-0.000-1M BALKH RIVER AT RABAT-I-BALA, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 18.5 18.6 19.2 19.6 20.6 21.1 21.6 22.3 23.6

0.10 10 20.9 21.1 21.5 21.9 22.9 23.6 24.2 24.9 26.0

0.20 5 23.9 24.1 24.4 24.7 25.7 26.7 27.4 28.1 29.1

0.50 2 29.8 29.9 30.1 30.4 31.2 32.5 33.5 34.1 35.0
349

12-0.000-1M BALKH RIVER AT RABAT-I-BALA, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 23.1 23.5 24.1 25.2 27.7 28.5 28.9 30.6

0.10 10 24.5 24.9 25.3 26.4 28.5 29.3 29.9 31.7

0.20 5 26.4 26.7 27.0 28.1 29.7 30.7 31.4 33.3

0.50 2 30.7 30.8 31.1 32.0 32.9 34.3 35.4 37.7

June-July-August September-October-November

0.05 20 19.3 20.0 20.4 21.4 20.2 20.6 21.0 22.0

0.10 10 21.9 22.5 22.8 23.7 22.9 23.3 23.7 24.7

0.20 5 25.3 25.8 26.1 26.9 26.4 26.7 27.1 28.1

0.50 2 32.7 33.1 33.5 34.2 33.3 33.6 33.9 34.8
350

12-0.000-1M BALKH RIVER AT RABAT-I-BALA, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1964 May 20, 1964 152 1977 May 29, 1977 531

1965 June 4, 1965 152 1972 June 2, 1972 507

1966 April 16, 1966 117 1976 April 28, 1976 490

1967 May 9, 1967 157 1973 April 25, 1973 441

1968 May 20, 1968 168 1975 May 4, 1975 345

1969 April 20, 1969 309 1969 April 20, 1969 309

1970 May 23, 1970 79.9 1978 April 27, 1978 309

1971 May 21, 1971 64.5 1974 May 26, 1974 235

1972 June 2, 1972 507 1968 May 20, 1968 168

1973 April 25, 1973 441 1967 May 9, 1967 157

1974 May 26, 1974 235 1964 May 20, 1964 152

1975 May 4, 1975 345 1965 June 4, 1965 152

1976 April 28, 1976 490 1966 April 16, 1966 117

1977 May 29, 1977 531 1970 May 23, 1970 79.9

1978 April 27, 1978 309 1971 May 21, 1971 64.5
351

12-0.000-1M BALKH RIVER AT RABAT-I-BALA, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[Data may not be rounded in accordance with U.S. Geological Survey publication standards; --, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1964 -- -- -- -- -- -- 66.1 128 97.2 52.3 36.8 37.5 --

1965 40.2 39.5 37.0 36.6 37.8 42.8 52.8 110 131 66.2 42.6 42.5 56.7

1966 45.0 45.9 47.3 47.3 48.2 55.9 61.8 73.7 67.6 44.0 37.6 37.3 51.0

1967 42.1 41.7 40.9 37.8 37.6 40.0 61.7 104 112 54.2 40.4 39.3 54.3

1968 42.2 41.6 39.0 35.7 33.5 37.0 54.9 88.7 120 56.1 45.2 40.1 52.8

1969 39.8 40.5 40.3 36.0 39.1 55.3 104 147 169 104 65.0 55.4 74.7

1970 51.1 53.5 45.3 43.1 35.5 40.7 50.2 64.6 46.5 29.8 26.7 31.1 43.2

1971 34.9 35.8 34.7 31.9 30.3 28.9 42.1 52.4 29.9 19.8 19.8 20.8 31.8

1972 23.7 26.3 27.4 29.0 29.6 35.5 45.6 92.5 121 41.4 31.0 30.0 44.4

1973 30.0 29.6 28.3 25.5 28.3 37.7 68.9 142 108 44.9 34.7 35.3 51.2

1974 33.4 32.9 34.5 33.4 32.0 35.8 44.7 79.0 55.2 34.1 32.7 32.7 40.1

1975 34.6 33.7 32.6 29.9 27.9 34.9 55.5 113 124 54.8 38.4 39.4 51.6

1976 40.0 38.5 37.5 36.8 36.7 38.4 72.3 150 125 50.6 34.1 31.9 57.7

1977 32.7 31.7 29.1 33.1 38.5 36.2 49.2 66.5 48.0 25.4 23.1 24.4 36.5

1978 22.7 26.0 27.1 27.5 31.7 34.9 61.0 107 74.4 38.1 29.1 31.3 42.6
352

12-0.000-9M BALKH RIVER NEAR NAYAK

(U.S. Geological Survey identification number: 344500067000000)

LOCATION: Lat 34o45'N., long 67o00'E.

DRAINAGE AREA: 1,460 km2

.

ELEVATION: 2,580 meters above mean sea level.

PERIOD OF RECORD: January 15, 1969 to September 30, 1978.

GAGE: Water-stage recorder.

0

1

2

3

4

5

6

7

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
353

12-0.000-9M BALKH RIVER NEAR NAYAK, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 5.77 1970 2.39 1972 3.81 0.89 0.23 5.84

November 5.50 1970 2.43 1972 3.68 0.86 0.23 5.63

December 4.54 1970 2.44 1972 3.55 0.66 0.19 5.44

January 4.26 1970 2.27 1972 3.55 0.71 0.20 5.44

February 4.82 1978 1.87 1972 3.47 0.99 0.29 5.31

March 5.22 1978 2.17 1972 3.87 0.95 0.24 5.93

April 9.40 1978 2.93 1972 6.41 1.69 0.26 9.83

May 19.5 1976 6.83 1971 13.6 4.61 0.34 20.9

June 20.6 1969 3.44 1971 10.7 5.50 0.52 16.4

July 9.99 1969 2.96 1971 4.95 2.11 0.43 7.59

August 6.56 1969 2.73 1971 3.78 1.10 0.29 5.79

September 6.12 1969 2.47 1971 3.91 0.92 0.23 6.00

Annual 6.62 1976 3.75 1971 5.26 0.94 0.18 100
354

12-0.000-9M BALKH RIVER NEAR NAYAK, Continued 

Monthly and annual flow duration, in cubic meters per second 

[ng, not given] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 2.36 2.40 2.43 2.17 1.92 2.13 2.62 6.61 3.28 2.96 2.72 2.61 2.46

90 2.53 2.60 2.68 2.29 1.96 2.37 3.67 7.26 3.84 3.03 2.74 2.67 2.79

85 3.35 3.00 2.81 2.57 2.03 2.70 4.24 7.63 4.09 3.09 2.78 3.33 2.99

80 3.39 3.18 3.01 2.99 2.22 3.19 4.52 8.07 4.60 3.28 2.82 3.38 3.27

75 3.52 3.24 3.12 3.13 2.79 3.32 4.82 8.86 5.26 3.43 2.95 3.56 3.39

70 3.55 3.38 3.17 3.16 3.00 3.57 5.03 9.35 6.02 3.51 3.00 3.62 3.50

65 3.58 3.41 3.36 3.38 3.21 3.66 5.21 9.89 6.80 3.58 3.14 3.67 3.60

60 3.60 3.45 3.39 3.53 3.40 3.77 5.40 10.6 7.58 3.70 3.30 3.75 3.71

55 3.63 3.48 3.41 3.58 3.68 3.88 5.71 11.1 8.51 3.91 3.54 3.81 3.83

50 3.66 3.52 3.43 3.72 3.84 3.97 6.15 12.1 9.30 4.46 3.73 3.84 3.94

45 3.69 3.55 3.60 3.78 3.89 4.01 6.30 13.0 10.0 4.63 3.78 3.86 4.06

40 3.72 3.72 3.78 3.92 3.93 4.05 6.47 14.5 11.7 4.83 3.83 3.89 4.18

35 3.86 3.80 3.94 3.96 3.98 4.09 6.77 15.7 12.8 5.17 3.90 3.92 4.30

30 3.91 3.89 4.00 4.11 4.02 4.32 7.20 17.5 14.2 5.45 4.09 4.10 4.59

25 4.08 4.11 4.06 4.15 4.14 4.44 7.44 18.6 15.2 5.65 4.16 4.16 5.10

20 4.20 4.20 4.21 ng 4.27 4.63 7.90 19.6 16.0 6.33 4.23 4.22 5.86

15 4.27 4.31 4.26 ng 4.41 4.86 8.45 20.4 17.6 6.94 4.28 4.30 7.26

10 5.60 4.74 4.42 ng 4.55 5.30 10.3 21.5 19.8 8.32 4.58 4.52 9.64

5 5.74 5.70 4.52 ng 4.75 5.49 11.7 24.6 22.9 9.29 6.45 5.98 14.4
355

12-0.000-9M BALKH RIVER NEAR NAYAK, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 5.00 5.23 5.07 4.81 4.52

0.95 1.05 8.10 7.64 7.24 6.89 6.47

0.90 1.11 10.3 9.21 8.67 8.26 7.75

0.80 1.25 13.4 11.4 10.7 10.2 9.55

0.50 2 21.1 16.6 15.6 14.9 13.9

0.20 5 30.9 23.1 21.9 20.9 19.5

0.10 10 36.6 26.9 25.8 24.7 22.9

0.04 25 43.1 31.3 30.6 29.2 27.0

0.02 50 47.4 34.3 33.9 32.3 29.8

0.01 100 51.3 37.1 37.0 35.3 32.5

0.005 200 54.8 1

39.6 40.1 38.2 35.1

0.002 500 59.0 ng ng ng ng

1

Data does not fit log-Pearson Type III curve, use with caution.

12-0.000-9M BALKH RIVER NEAR NAYAK, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 1.40 1.40 1.60 1.77 1.97 2.12 2.18 2.29 2.37

0.10 10 1.66 1.68 1.86 2.01 2.23 2.39 2.47 2.57 2.65

0.20 5 2.01 2.05 2.19 2.32 2.55 2.72 2.82 2.90 2.99

0.50 2 2.69 2.79 2.86 2.95 3.17 3.32 3.44 3.50 3.62
356

12-0.000-9M BALKH RIVER NEAR NAYAK, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 1.42 1.64 1.81 2.00 1.80 1.93 1.98 2.24

0.10 10 1.76 1.98 2.14 2.33 2.08 2.25 2.32 2.59

0.20 5 2.20 2.42 2.56 2.73 2.46 2.67 2.75 3.03

0.50 2 3.04 3.23 3.33 3.45 3.25 3.50 3.61 3.89

June-July-August September-October-November

0.05 20 2.42 2.51 2.54 2.62 2.13 2.25 2.36 2.45

0.10 10 2.53 2.60 2.63 2.72 2.37 2.48 2.57 2.64

0.20 5 2.70 2.75 2.79 2.89 2.68 2.78 2.85 2.90

0.50 2 3.19 3.23 3.27 3.41 3.29 3.39 3.43 3.49

12-0.000-9M BALKH RIVER NEAR NAYAK, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1969 May 31, 1969 29.0 1975 May 15, 1975 41.0

1970 April 13, 1970 10.3 1976 June 3, 1976 29.7

1971 May 9, 1971 8.12 1969 May 31, 1969 29.0

1972 May 31, 1972 26.4 1972 May 31, 1972 26.4

1973 May 16, 1973 21.8 1978 May 24, 1978 22.8

1974 May 25, 1974 19.0 1973 May 16, 1973 21.8

1975 May 15, 1975 41.0 1974 May 25, 1974 19.0

1976 June 3, 1976 29.7 1977 May 26, 1977 14.2

1977 May 26, 1977 14.2 1970 April 13, 1970 10.3

1978 May 24, 1978 22.8 1971 May 9, 1971 8.12
357

12-0.000-9M BALKH RIVER NEAR NAYAK, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[Data may not be rounded in accordance with U.S. Geological Survey publication standards; --, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1969 -- -- -- -- 1.99 2.70 6.58 16.4 20.6 9.99 6.56 6.12 --

1970 5.77 5.50 4.54 4.26 4.00 4.01 7.22 7.96 4.93 3.42 3.00 3.38 4.83

1971 3.40 3.26 3.26 3.52 3.67 4.12 5.31 6.83 3.44 2.96 2.73 2.47 3.75

1972 2.39 2.43 2.44 2.27 1.87 2.17 2.93 12.0 12.0 5.12 3.98 4.01 4.47

1973 3.74 3.50 3.35 3.15 3.15 3.69 7.71 17.0 11.5 5.36 4.24 3.93 5.87

1974 3.70 3.37 3.30 3.65 3.86 4.46 6.35 10.2 5.10 3.67 3.37 3.80 4.58

1975 3.49 3.10 2.97 2.73 2.80 3.65 5.45 16.1 15.3 5.87 3.82 3.64 5.75

1976 3.74 3.98 3.94 4.11 4.21 3.66 6.28 19.5 15.6 6.12 3.98 4.27 6.62

1977 4.27 4.28 4.22 4.08 4.32 5.06 6.92 10.9 7.65 3.22 3.18 4.00 5.17

1978 3.83 3.68 3.92 4.18 4.82 5.22 9.40 19.2 10.6 3.81 2.96 3.53 6.27
358

12-0.000-10M BALKH RIVER BELOW BAND-I-AMIR

(U.S. Geological Survey identification number: 344900067100000)

LOCATION: Lat 34o49'N., long 67o10'E.

DRAINAGE AREA: 445 km2

.

ELEVATION: 2,882 meters above mean sea level.

PERIOD OF RECORD: October 1, 1969 to March 20, 1976.

GAGE: Staff gage.

0.00

0.20

0.40

0.60

0.80

1.00

1.20

1.40

1.60

1.80

2.00

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
359

12-0.000-10M BALKH RIVER BELOW BAND-I-AMIR, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 1.95 1970 1.08 1976 1.24 0.31 0.25 7.15

November 1.83 1970 0.83 1975 1.27 0.33 0.26 7.29

December 1.61 1970 0.64 1975 1.16 0.30 0.26 6.70

January 1.75 1970 0.51 1975 1.18 0.41 0.35 6.78

February 1.85 1970 0.65 1975 1.30 0.41 0.32 7.50

March 2.18 1970 0.76 1975 1.47 0.48 0.33 8.48

April 3.02 1971 1.17 1974 2.17 0.74 0.34 12.5

May 6.83 1975 1.26 1974 2.71 2.05 0.76 15.6

June 1.91 1975 1.07 1971 1.52 0.31 0.20 8.76

July 1.29 1974 0.93 1971 1.17 0.13 0.11 6.73

August 1.25 1975 0.93 1971 1.06 0.12 0.11 6.13

September 1.24 1975 0.87 1973 1.11 0.13 0.11 6.38

Annual 1.72 1970 1.22 1974 1.46 0.19 0.13 100
360

12-0.000-10M BALKH RIVER BELOW BAND-I-AMIR, Continued 

Monthly and annual flow duration, in cubic meters per second 

[ng, not given] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 0.97 0.78 0.60 0.51 0.64 0.71 1.16 1.28 0.87 0.93 0.92 0.88 0.74

90 1.01 0.90 0.70 0.55 0.65 0.73 1.18 1.31 1.17 0.94 0.93 0.91 0.89

85 1.05 0.97 1.01 0.87 0.95 0.88 1.20 1.35 1.26 0.94 0.93 0.91 0.95

80 1.07 1.07 1.07 0.93 1.04 1.18 1.38 1.47 1.28 1.09 0.93 0.94 1.04

75 1.08 1.09 1.09 0.95 1.08 1.20 1.47 1.57 1.30 1.10 0.94 1.02 1.08

70 1.09 1.11 1.09 0.97 1.10 1.28 1.59 1.75 1.32 1.13 1.00 1.02 1.12

65 1.09 1.15 1.10 1.05 1.12 1.31 1.69 1.93 1.34 1.14 1.01 1.06 1.16

60 1.10 1.17 1.11 1.08 1.14 1.33 1.74 1.99 1.42 1.18 1.01 1.09 1.19

55 1.13 1.18 1.11 1.10 1.19 1.35 1.78 2.02 1.44 1.18 1.01 1.10 1.23

50 1.15 1.19 1.12 1.11 1.24 1.44 1.81 2.06 1.47 1.19 1.02 1.10 1.27

45 1.17 1.20 1.14 1.14 1.27 1.59 1.94 2.10 1.49 1.20 1.09 1.11 1.32

40 1.18 1.21 1.16 1.42 1.50 1.62 2.08 2.17 1.51 1.21 1.09 1.14 1.36

35 1.19 1.27 1.19 1.45 1.60 1.65 2.54 2.24 1.60 1.25 1.10 1.18 1.46

30 1.21 1.34 1.35 1.47 1.62 1.68 2.69 2.38 1.64 1.26 1.11 1.19 1.56

25 1.26 1.49 1.40 1.49 1.65 1.70 2.80 2.46 1.68 1.26 1.18 1.20 1.64

20 1.28 1.57 1.42 1.51 1.67 1.78 2.99 2.55 1.75 1.26 1.19 1.25 1.74

15 1.34 1.60 1.44 1.53 1.69 2.10 3.13 4.23 1.84 1.27 1.23 1.32 1.85

10 ng 1.70 1.53 ng ng 2.14 3.35 5.82 2.01 1.34 1.27 1.34 2.04

5 ng ng ng ng ng 2.27 3.75 8.39 2.18 1.35 ng 1.41 2.59
361

12-0.000-10M BALKH RIVER BELOW BAND-I-AMIR, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 ng 11.31 11.32 1.34 1.31

0.95 1.05 ng 1.49 1.49 1.49 1.46

0.90 1.11 ng 1.65 1.63 1.62 1.58

0.80 1.25 ng 1.92 1.88 1.85 1.79

0.50 2 ng 2.87 2.78 2.66 2.51

0.20 5 ng 5.08 4.91 4.58 4.07

0.10 10 ng 7.37 7.15 6.56 5.59

0.04 25 ng 11.6 11.4 10.3 8.25

0.02 50 ng 16.1 15.9 14.2 10.9

0.01 100 ng 22.2 22.0 19.5 14.4

0.005 200 ng 30.2 30.2 26.6 18.8

0.002 500 ng ng ng ng ng

1

Data does not fit log-Pearson Type III curve, use with caution.

12-0.000-10M BALKH RIVER BELOW BAND-I-AMIR, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 0.41 0.41 0.42 0.44 0.45 0.51 0.55 0.59 0.72

0.10 10 0.49 0.49 0.51 0.53 0.56 0.61 0.65 0.70 0.81

0.20 5 0.59 0.60 0.62 0.65 0.68 0.73 0.78 0.83 0.92

0.50 2 0.80 0.82 0.84 0.87 0.91 0.95 0.99 1.04 1.08
362

12-0.000-10M BALKH RIVER BELOW BAND-I-AMIR, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 0.46 0.47 0.49 0.50 0.68 0.68 0.67 0.71

0.10 10 0.59 0.59 0.61 0.62 0.81 0.82 0.82 0.86

0.20 5 0.75 0.76 0.77 0.79 0.97 1.00 1.00 1.04

0.50 2 1.08 1.09 1.10 1.13 1.28 1.32 1.35 1.41

June-July-August September-October-November

0.05 20 0.74 0.79 0.83 0.87 0.70 0.72 0.73 0.79

0.10 10 0.79 0.84 0.86 0.91 0.74 0.76 0.79 0.84

0.20 5 0.85 0.89 0.91 0.96 0.79 0.82 0.85 0.90

0.50 2 0.96 0.99 1.00 1.04 0.90 0.92 0.97 1.01

12-0.000-10M BALKH RIVER BELOW BAND-I-AMIR, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1970 April 12, 1970 4.00 1975 May 21, 1975 9.89

1971 April 18, 1971 3.43 1970 April 12, 1970 4.00

1972 May 20, 1972 2.63 1971 April 18, 1971 3.43

1973 May 16, 1973 2.10 1972 May 20, 1972 2.63

1974 June 7, 1974 1.67 1973 May 16, 1973 2.10

1975 May 21, 1975 9.89 1974 June 7, 1974 1.67
363

12-0.000-10M BALKH RIVER BELOW BAND-I-AMIR, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[Data may not be rounded in accordance with U.S. Geological Survey publication standards; --, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1970 1.95 1.83 1.61 1.75 1.85 2.18 2.93 1.81 1.29 1.22 1.12 1.12 1.72

1971 1.11 1.27 1.41 1.49 1.67 1.71 3.02 2.01 1.07 0.93 0.93 1.19 1.48

1972 1.10 1.11 1.15 1.44 1.56 1.64 1.82 2.36 1.78 1.24 0.96 1.09 1.44

1973 1.19 1.20 1.10 1.10 1.13 1.25 1.65 2.00 1.55 1.16 1.03 0.87 1.27

1974 1.16 1.54 1.13 0.92 1.13 1.31 1.17 1.26 1.54 1.29 1.10 1.14 1.22

1975 1.11 0.83 0.64 0.51 0.65 0.76 2.43 6.83 1.91 1.18 1.25 1.24 1.62

1976 1.08 1.09 1.11 1.04 1.14 -- -- -- -- -- -- -- --
364

12-1.R00-1A SUF RIVER NEAR KISHANDEH

(U.S. Geological Survey identification number: 360800066570000)

LOCATION: Lat 36o08'N., long 66o57'E.

DRAINAGE AREA: 3,070 km2

.

ELEVATION: 753 meters above mean sea level.

PERIOD OF RECORD: January 9, 1969 to September 30, 1978.

GAGE: Water-stage recorder.

0

0.5

1

1.5

2

2.5

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
365

12-1.R00-1A SUF RIVER NEAR KISHANDEH, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second; ng, not given] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 2.12 1970 0.40 1972 1.38 0.52 0.38 7.74

November 2.67 1977 0.67 1972 1.71 0.53 0.31 9.60

December 3.38 1977 0.96 1972 1.97 0.72 0.36 11.0

January 3.15 1977 1.13 1972 2.06 0.58 0.28 11.5

February 2.89 1969 1.27 1972 2.02 0.52 0.26 11.3

March 2.98 1969 1.67 1973 2.05 0.44 0.22 11.5

April 4.53 1976 1.18 1974 2.22 1.03 0.46 12.5

May 7.70 1976 0.09 1971 2.39 2.34 0.98 13.4

June 2.64 1972 0 1975 0.52 0.82 1.57 2.93

July 1.11 1969 0 ng 0.16 0.34 2.19 0.88

August 1.57 1969 0.02 1971 0.37 0.46 1.25 2.05

September 2.04 1969 0.12 1971 1.00 0.53 0.53 5.60

Annual 2.06 1976 1.04 1971 1.41 0.31 0.22 100
366

12-1.R00-1A SUF RIVER NEAR KISHANDEH, Continued 

Monthly and annual flow duration, in cubic meters per second 

[ng, not given] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 0.37 0.66 0.98 1.14 1.15 1.30 0.78 0 0 0 0 0.04 0

90 0.47 0.75 1.05 1.16 1.27 1.40 0.97 0 0 0 0 0.30 0

85 1.00 1.27 1.48 1.61 1.40 1.56 1.13 0 0 0 0 0.47 0

80 1.05 1.39 1.62 1.73 1.53 1.69 1.24 0 0 0 0 0.58 0.09

75 1.08 1.44 1.71 1.75 1.60 1.73 1.31 0.01 0 0 0 0.62 0.39

70 1.14 1.55 1.75 1.77 1.71 1.76 1.37 0.45 0 0 0 0.67 0.64

65 1.23 1.66 1.77 1.85 1.76 1.80 1.50 0.73 0 0 0 0.72 0.92

60 1.37 1.70 1.78 1.92 1.93 1.86 1.65 0.89 0 0 0.01 0.78 1.08

55 1.41 1.72 1.80 1.93 2.07 1.90 1.76 1.06 0.01 0 0.02 0.86 1.25

50 1.43 1.74 1.81 1.95 2.10 1.93 1.87 1.23 0.02 0 0.18 0.93 1.41

45 1.45 1.77 1.83 2.05 2.18 1.96 1.97 1.42 0.04 0 0.25 0.98 1.54

40 1.47 1.79 1.85 2.09 2.22 2.00 2.03 1.61 0.11 0 0.28 1.05 1.64

35 1.49 1.82 1.88 2.15 2.26 2.05 2.09 1.79 0.18 0.01 0.39 1.12 1.74

30 1.57 1.86 1.91 2.23 2.31 2.12 2.16 2.21 0.39 0.04 0.47 1.22 1.84

25 1.68 1.92 1.95 2.31 2.38 2.25 2.25 2.92 0.72 0.09 0.59 1.33 1.96

20 1.96 2.02 2.45 2.55 2.41 2.39 2.39 3.74 0.90 0.22 0.66 1.48 2.10

15 2.07 2.22 3.06 2.73 2.52 2.80 2.64 5.18 1.01 0.30 0.71 1.80 2.25

10 2.12 2.36 3.18 3.03 2.77 2.97 3.23 6.66 1.23 0.71 1.16 1.93 2.42

5 2.16 ng ng ng ng 3.12 4.75 9.09 1.61 ng 1.58 2.04 3.15
367

12-1.R00-1A SUF RIVER NEAR KISHANDEH, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 1.40 11.24 11.45 1.78 1.57

0.95 1.05 3.30 11.95 11.92 1.99 1.79

0.90 1.11 5.00 2.49 2.26 2.16 1.97

0.80 1.25 8.00 3.37 2.80 2.45 2.24

0.50 2 18.0 6.18 4.43 3.40 3.07

0.20 5 36.4 11.6 7.48 5.37 4.63

0.10 10 50.5 16.4 10.1 7.23 5.99

0.04 25 69.5 23.8 14.2 10.4 8.14

0.02 50 84.1 30.4 18.0 13.5 10.1

0.01 100 98.8 38.0 22.3 17.4 12.4

0.005 200 114 46.9 27.4 22.2 15.2

0.002 500 133 ng ng ng ng

1

Data does not fit log-Pearson Type III curve, use with caution.

12-1.R00-1A SUF RIVER NEAR KISHANDEH, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second; ng, not given] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 ng ng ng 0 0 0 0.03 0.03 0.14

0.10 10 ng ng ng 0 0 0 0.04 0.06 0.22

0.20 5 ng ng ng 0 0 0.01 0.06 0.12 0.36

0.50 2 ng ng ng 0 0 0.02 0.13 0.34 0.72
368

12-1.R00-1A SUF RIVER NEAR KISHANDEH, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second; ng, not given] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 0.87 0.90 0.94 1.01 0 0 0 0.10

0.10 10 1.00 1.05 1.08 1.15 0 0 0 0.21

0.20 5 1.16 1.23 1.27 1.33 0 0 0 0.44

0.50 2 1.51 1.61 1.64 1.72 0 0 0.36 1.21

June-July-August September-October-November

0.05 20 ng ng 0 0 0 0 0.05 0.16

0.10 10 ng ng 0 0 0 0 0.12 0.27

0.20 5 ng ng 0 0 0.10 0.36 0.26 0.46

0.50 2 ng ng 0 0 0.46 0.53 0.75 0.97

12-1.R00-1A SUF RIVER NEAR KISHANDEH, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1969 April 20, 1969 10.0 1976 April 19, 1976 66.8

1970 April 16, 1970 5.92 1977 April 15, 1977 40.4

1971 April 10, 1971 3.02 1972 May 13, 1972 25.6

1972 May 13, 1972 25.6 1973 April 24, 1973 24.3

1973 April 24, 1973 24.3 1975 May 3, 1975 24.3

1974 March 28, 1974 14.5 1978 May 26, 1978 16.0

1975 May 3, 1975 24.3 1974 March 28, 1974 14.5

1976 April 19, 1976 66.8 1969 April 20, 1969 10.0

1977 April 15, 1977 40.4 1970 April 16, 1970 5.92

1978 May 26, 1978 16.0 1971 April 10, 1971 3.02
369

12-1.R00-1A SUF RIVER NEAR KISHANDEH, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[Data may not be rounded in accordance with U.S. Geological Survey publication standards; --, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1969 -- -- -- -- 2.89 2.98 3.35 3.80 0.87 1.11 1.57 2.04 --

1970 2.12 2.13 1.89 1.94 1.72 2.70 2.25 0.55 0.10 0.15 0.18 0.69 1.37

1971 1.43 1.72 1.82 2.07 2.29 1.77 1.23 0.09 0.03 0.03 0.02 0.12 1.04

1972 0.40 0.67 0.96 1.13 1.27 1.76 2.02 3.69 2.64 0 0.10 0.73 1.28

1973 1.39 1.73 1.74 1.95 1.36 1.67 1.73 1.41 0.02 0.04 0.64 0.84 1.21

1974 1.08 1.59 2.85 2.67 2.32 2.14 1.18 0.73 0.11 0 0.18 1.01 1.32

1975 1.38 1.69 1.74 1.70 1.60 1.76 2.01 1.58 0 0.19 0.35 0.70 1.22

1976 1.08 1.45 1.83 2.19 2.06 2.02 4.53 7.70 0.16 0.04 0.26 1.40 2.06

1977 2.06 2.67 3.38 3.15 2.49 1.81 2.41 0.71 0.93 0 0.08 1.03 1.72

1978 1.50 1.78 1.54 1.75 2.17 1.92 1.53 3.64 0.36 0 0.28 1.45 1.49
370

13-0.000-1M KHULM RIVER AT TANGI TASHQURGHAN

(U.S. Geological Survey identification number: 364000067420000)

LOCATION: Lat 36o40'N., long 67o42'E.

DRAINAGE AREA: 8,220 km2

.

ELEVATION: 515 meters above mean sea level.

PERIOD OF RECORD: February 17, 1969 to September 30, 1978.

GAGE: Water-stage recorder. Staff gage at same site and datum prior to 1970 water year.

0

0.5

1

1.5

2

2.5

3

3.5

4

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
371

13-0.000-1M KHULM RIVER AT TANGI TASHQURGHAN, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 2.26 1978 1.21 1974 1.71 0.35 0.21 5.50

November 4.75 1978 1.61 1974 2.59 1.01 0.39 8.35

December 4.56 1970 1.70 1974 2.97 0.99 0.33 9.57

January 4.05 1970 1.44 1974 2.81 0.75 0.27 9.04

February 3.55 1970 1.44 1974 2.64 0.66 0.25 8.51

March 6.12 1969 2.31 1973 3.57 1.30 0.36 11.5

April 11.7 1976 1.09 1978 3.96 3.13 0.79 12.8

May 11.3 1969 1.13 1971 4.66 3.45 0.74 15.0

June 4.90 1969 0.94 1974 2.10 1.18 0.56 6.77

July 2.61 1969 0.82 1977 1.36 0.52 0.38 4.37

August 2.33 1969 0.70 1978 1.22 0.43 0.35 3.94

September 2.52 1969 0.76 1978 1.45 0.46 0.32 4.68

Annual 3.39 1976 1.38 1974 2.42 0.59 0.24 100
372

13-0.000-1M KHULM RIVER AT TANGI TASHQURGHAN, Continued 

Monthly and annual flow duration, in cubic meters per second 

[ng, not given] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 0.96 1.21 1.39 1.33 1.31 1.47 0.89 0.62 0.82 0.76 0.58 0.76 0.81

90 1.07 1.42 1.55 1.68 1.78 1.76 1.07 0.93 0.94 0.82 0.69 0.87 0.95

85 1.16 1.53 1.77 2.09 1.89 1.96 1.22 1.10 1.01 0.86 0.74 0.95 1.06

80 1.30 1.59 2.17 2.21 2.00 2.23 1.34 1.22 1.06 0.89 0.78 0.99 1.15

75 1.33 1.66 2.35 2.32 2.16 2.46 1.48 1.31 1.18 0.94 0.83 1.12 1.25

70 1.39 1.90 2.44 2.39 2.30 2.61 1.65 1.39 1.25 0.97 0.92 1.22 1.35

65 1.45 2.07 2.51 2.48 2.37 2.73 1.86 1.48 1.31 1.04 1.00 1.26 1.45

60 1.50 2.20 2.59 2.59 2.45 2.88 2.09 1.58 1.35 1.09 1.04 1.29 1.57

55 1.54 2.33 2.67 2.68 2.51 3.03 2.33 1.71 1.40 1.14 1.08 1.32 1.70

50 1.57 2.42 2.99 2.76 2.56 3.19 2.57 2.02 1.47 1.20 1.12 1.35 1.84

45 1.61 2.52 3.10 2.81 2.66 3.46 2.91 2.51 1.55 1.24 1.16 1.40 2.06

40 1.74 2.62 3.20 2.85 2.76 3.66 3.21 2.98 1.62 1.31 1.21 1.44 2.26

35 1.84 2.73 3.41 2.92 2.90 3.98 3.46 3.60 1.69 1.39 1.27 1.48 2.45

30 1.92 2.83 3.52 3.14 3.10 4.13 3.70 4.34 1.86 1.46 1.35 1.55 2.64

25 2.02 2.99 3.64 3.24 3.24 4.27 4.00 5.05 2.00 1.51 1.45 1.67 2.90

20 2.15 3.30 3.96 3.53 3.37 4.43 4.32 6.42 2.39 1.64 1.56 1.75 3.19

15 2.33 3.81 4.34 3.93 3.49 4.63 4.90 7.85 3.63 1.84 1.68 1.91 3.63

10 2.47 4.19 4.52 4.02 3.56 5.28 6.26 10.8 4.06 2.14 1.86 2.12 4.17

5 2.78 4.46 4.70 4.28 3.62 6.35 10.4 18.4 5.60 ng 2.44 2.59 4.77
373

13-0.000-1M KHULM RIVER AT TANGI TASHQURGHAN, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 0.90 11.63 12.00 2.09 2.00

0.95 1.05 3.20 12.81 2.83 2.70 2.52

0.90 1.11 5.90 3.77 3.47 3.16 2.89

0.80 1.25 11.4 5.40 4.55 3.92 3.45

0.50 2 33.6 10.8 8.18 6.31 5.06

0.20 5 78.1 21.7 16.1 11.2 7.88

0.10 10 111 31.4 23.9 15.7 10.2

0.04 25 153 46.7 37.5 23.3 13.6

0.02 50 182 60.5 51.1 30.5 16.6

0.01 100 209 76.3 68.2 39.5 20.0

0.005 200 234 94.6 89.7 50.5 23.8

0.002 500 264 ng ng ng ng

1

Data does not fit log-Pearson Type III curve, use with caution.

13-0.000-1M KHULM RIVER AT TANGI TASHQURGHAN, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 0.06 0.09 0.11 0.60 0.77 0.95 1.05 1.09 1.12

0.10 10 0.11 0.15 0.22 0.65 0.79 0.96 1.05 1.10 1.18

0.20 5 0.19 0.27 0.40 0.73 0.84 0.99 1.07 1.13 1.27

0.50 2 0.48 0.61 0.81 0.91 0.99 1.11 1.17 1.24 1.54
374

13-0.000-1M KHULM RIVER AT TANGI TASHQURGHAN, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 0.92 1.00 1.13 1.43 0.12 0.51 0.57 0.87

0.10 10 1.03 1.15 1.30 1.60 0.22 0.60 0.74 1.07

0.20 5 1.19 1.36 1.53 1.82 0.40 0.74 1.00 1.36

0.50 2 1.60 1.86 2.05 2.29 0.93 1.13 1.69 2.19

June-July-August September-October-November

0.05 20 0.12 0.12 0.63 0.71 0.43 0.76 0.98 1.05

0.10 10 0.21 0.23 0.66 0.74 0.53 0.81 1.02 1.1

0.20 5 0.36 0.42 0.71 0.79 0.67 0.86 1.07 1.17

0.50 2 0.72 0.86 0.86 0.97 0.92 0.98 1.19 1.35

13-0.000-1M KHULM RIVER AT TANGI TASHQURGHAN, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1969 May 11, 1969 50.4 1976 May 25, 1976 85.2

1970 May 10, 1970 7.54 1973 May 16, 1973 80.0

1971 April 14, 1971 4.60 1978 November 8, 1977 72.8

1972 May 16, 1972 30.0 1977 May 29, 1977 57.0

1973 May 16, 1973 80.0 1969 May 11, 1969 50.4

1974 May 10, 1974 4.80 1975 May 16, 1975 49.2

1975 May 16, 1975 49.2 1972 May 16, 1972 30.0

1976 May 25, 1976 85.2 1970 May 10, 1970 7.54

1977 May 29, 1977 57.0 1974 May 10, 1974 4.80

1978 November 8, 1977 72.8 1971 April 14, 1971 4.60
375

13-0.000-1M KHULM RIVER AT TANGI TASHQURGHAN, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[Data may not be rounded in accordance with U.S. Geological Survey publication standards; --, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1969 -- -- -- -- -- 6.12 6.67 11.3 4.90 2.61 2.33 2.52 --

1970 2.25 3.78 4.56 4.05 3.55 4.16 3.30 3.44 2.72 1.79 1.05 1.39 3.00

1971 1.49 2.52 3.44 2.77 2.98 3.11 2.64 1.13 1.24 1.34 1.15 1.68 2.12

1972 1.84 1.99 2.12 2.39 2.26 4.20 3.82 9.22 2.25 1.38 1.04 1.48 2.84

1973 1.57 2.26 2.50 2.86 2.64 2.31 3.62 3.35 1.38 1.26 1.32 1.51 2.21

1974 1.21 1.61 1.70 1.44 1.44 2.40 1.31 1.30 0.94 1.00 1.07 1.13 1.38

1975 1.53 2.26 3.18 2.77 2.26 2.66 2.75 4.95 1.78 1.28 1.03 1.24 2.31

1976 1.51 2.23 3.04 2.42 2.83 5.17 11.7 6.57 1.54 1.17 1.29 1.24 3.39

1977 1.70 1.92 2.00 3.64 3.45 3.03 2.69 4.07 2.95 0.82 1.24 1.59 2.42

1978 2.26 4.75 4.20 2.91 2.37 2.52 1.09 1.28 1.31 0.93 0.70 0.76 2.09
376

13-0.000-2M KHULM RIVER AT SAYAD

(U.S. Geological Survey identification number: 363500067470000)

LOCATION: Lat 36o35'N., long 67o47'E.

DRAINAGE AREA: 8,170 km2

.

ELEVATION: 669 meters above mean sea level.

PERIOD OF RECORD: May 13, 1964 to September 30, 1978.

GAGE: Water-stage recorder. Staff gage at same site and datum prior to 1970 water year.

0

0.5

1

1.5

2

2.5

3

3.5

4

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
377

13-0.000-2M KHULM RIVER AT SAYAD, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 2.41 1968 0.80 1965 1.44 0.44 0.30 5.98

November 3.38 1970 0.91 1965 1.92 0.77 0.40 7.98

December 3.25 1970 0.75 1965 2.12 0.67 0.32 8.80

January 3.06 1969 1.21 1965 2.06 0.48 0.23 8.53

February 3.33 1969 1.63 1973 2.13 0.43 0.20 8.83

March 5.52 1969 1.73 1977 2.66 0.98 0.37 11.0

April 10.1 1976 1.07 1978 2.91 2.31 0.79 12.1

May 9.73 1969 0.99 1978 3.90 2.69 0.69 16.2

June 3.25 1968 0.64 1976 1.45 0.78 0.53 6.02

July 1.82 1969 0.71 1975 1.15 0.35 0.30 4.79

August 1.84 1967 0.84 1976 1.10 0.30 0.28 4.58

September 1.99 1967 0.84 1978 1.25 0.36 0.29 5.18

Annual 3.47 1969 1.39 1974 2.02 0.56 0.28 100
378

13-0.000-2M KHULM RIVER AT SAYAD, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 0.72 0.85 0.78 1.27 1.36 1.29 0.92 0.87 0.56 0.69 0.79 0.72 0.78

90 0.85 0.93 1.28 1.38 1.46 1.55 1.06 0.95 0.71 0.74 0.82 0.81 0.87

85 0.89 1.01 1.52 1.57 1.57 1.70 1.16 0.99 0.79 0.79 0.84 0.89 0.94

80 0.95 1.14 1.60 1.64 1.65 1.89 1.24 1.03 0.86 0.83 0.86 0.92 1.00

75 0.99 1.28 1.67 1.71 1.78 1.98 1.33 1.10 0.89 0.87 0.87 0.95 1.07

70 1.03 1.52 1.74 1.77 1.87 2.06 1.44 1.18 0.93 0.89 0.89 0.98 1.15

65 1.09 1.59 1.82 1.83 1.95 2.22 1.55 1.32 0.97 0.91 0.92 1.00 1.26

60 1.14 1.65 1.89 1.94 2.05 2.31 1.67 1.45 1.00 0.94 0.94 1.02 1.39

55 1.21 1.70 1.99 2.02 2.10 2.38 1.81 1.60 1.04 0.96 0.96 1.05 1.51

50 1.30 1.76 2.09 2.08 2.15 2.46 1.97 1.80 1.08 1.00 0.98 1.08 1.64

45 1.39 1.83 2.17 2.11 2.19 2.55 2.12 2.06 1.12 1.07 1.00 1.15 1.75

40 1.48 1.91 2.26 2.15 2.24 2.65 2.29 2.36 1.16 1.14 1.02 1.20 1.87

35 1.59 2.00 2.34 2.20 2.29 2.76 2.45 2.84 1.25 1.19 1.04 1.31 2.00

30 1.69 2.10 2.45 2.25 2.33 2.86 2.65 3.43 1.36 1.27 1.08 1.41 2.14

25 1.78 2.31 2.64 2.32 2.37 3.04 2.87 3.83 1.49 1.36 1.13 1.48 2.30

20 1.89 2.60 2.81 2.43 2.44 3.22 3.11 4.69 1.66 1.54 1.20 1.62 2.45

15 1.99 2.84 2.94 2.57 2.55 3.41 3.46 6.14 1.82 1.64 1.43 1.81 2.71

10 2.15 3.12 3.09 2.77 2.71 3.73 4.29 9.14 2.30 1.79 1.73 2.03 3.08

5 2.60 3.42 3.27 3.12 2.98 4.20 6.46 16.5 4.38 2.03 1.95 2.16 3.81
379

13-0.000-2M KHULM RIVER AT SAYAD, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 1.00 11.30 11.51 11.63 1.70

0.95 1.05 2.90 2.50 2.40 2.27 2.15

0.90 1.11 4.80 3.49 3.10 2.74 2.47

0.80 1.25 8.50 5.19 4.25 3.48 2.97

0.50 2 22.6 10.7 7.93 5.72 4.38

0.20 5 52.0 21.1 15.3 9.88 6.86

0.10 10 76.1 29.6 21.7 13.4 8.88

0.04 25 110 41.8 31.9 18.9 11.9

0.02 50 137 51.9 41.2 23.9 14.6

0.01 100 164 62.8 51.9 29.5 17.6

0.005 200 192 74.5 64.4 36.1 21.0

0.002 500 228 ng ng ng ng

1

Data does not fit log-Pearson Type III curve, use with caution.

13-0.000-2M KHULM RIVER AT SAYAD, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 0.38 0.41 0.42 0.47 0.56 0.64 0.70 0.77 0.92

0.10 10 0.45 0.47 0.49 0.54 0.62 0.70 0.76 0.83 0.97

0.20 5 0.53 0.56 0.58 0.64 0.70 0.79 0.85 0.91 1.05

0.50 2 0.71 0.74 0.77 0.85 0.91 1.01 1.06 1.11 1.27
380

13-0.000-2M KHULM RIVER AT SAYAD, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 0.77 0.83 0.87 0.95 0.72 0.8 0.84 0.93

0.10 10 0.91 0.99 1.03 1.14 0.74 0.83 0.91 1.04

0.20 5 1.08 1.19 1.25 1.38 0.78 0.88 1.02 1.21

0.50 2 1.44 1.59 1.68 1.85 0.91 1.06 1.33 1.69

June-July-August September-October-November

0.05 20 0.41 0.46 0.50 0.59 0.57 0.61 0.68 0.79

0.10 10 0.48 0.53 0.58 0.65 0.61 0.65 0.74 0.84

0.20 5 0.57 0.63 0.68 0.74 0.66 0.72 0.82 0.92

0.50 2 0.76 0.83 0.89 0.95 0.81 0.89 1.03 1.12

13-0.000-2M KHULM RIVER AT SAYAD, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1965 May 7, 1965 24.4 1976 May 25, 1976 80.0

1966 April 14, 1966 4.08 1973 May 16, 1973 75.0

1967 May 24, 1967 17.0 1978 November 8, 1977 70.0

1968 May 20, 1968 23.6 1969 May 11, 1969 45.0

1969 May 11, 1969 45.0 1977 April 14, 1977 36.5

1970 April 7, 1970 10.2 1972 May 16, 1972 25.0

1971 March 13, 1971 3.87 1975 May 17, 1975 25.0

1972 May 16, 1972 25.0 1965 May 7, 1965 24.4

1973 May 16, 1973 75.0 1968 May 20, 1968 23.6

1974 March 15, 1974 3.20 1967 May 24, 1967 17.0

1975 May 17, 1975 25.0 1970 April 7, 1970 10.2

1976 May 25, 1976 80.0 1966 April 14, 1966 4.08

1977 April 14, 1977 36.5 1971 March 13, 1971 3.87

1978 November 8, 1977 70.0 1974 March 15, 1974 3.20
381

13-0.000-2M KHULM RIVER AT SAYAD, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[Data may not be rounded in accordance with U.S. Geological Survey publication standards; --, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1964 -- -- -- -- -- -- -- -- 0.94 0.90 0.97 0.96 --

1965 0.80 0.91 0.75 1.21 2.05 2.25 2.27 5.31 1.39 1.29 0.91 1.35 1.71

1966 1.31 1.95 2.22 2.11 2.25 2.45 1.99 1.51 1.15 1.05 0.90 1.10 1.66

1967 1.75 1.98 2.20 2.31 2.23 1.86 1.72 5.40 1.52 1.64 1.84 1.99 2.21

1968 2.41 3.00 2.85 2.13 1.85 2.31 2.64 5.15 3.25 1.51 1.39 1.75 2.52

1969 1.60 1.63 2.86 3.06 3.33 5.52 5.37 9.73 3.05 1.82 1.68 1.87 3.47

1970 2.07 3.38 3.25 2.81 2.40 3.50 2.56 1.71 1.31 1.53 1.21 1.44 2.26

1971 1.42 2.02 2.72 2.18 2.24 2.31 1.87 1.05 1.24 1.23 1.03 1.01 1.69

1972 0.93 1.22 1.52 1.82 2.12 3.14 3.10 7.50 1.58 1.05 1.07 1.20 2.19

1973 1.14 1.41 1.53 1.61 1.63 2.29 2.76 2.27 1.20 1.20 0.96 0.97 1.58

1974 1.43 1.43 1.70 1.71 1.85 2.42 1.22 1.19 0.93 0.95 0.90 0.97 1.39

1975 1.15 1.48 1.95 1.95 1.78 2.15 2.18 3.52 0.72 0.71 0.84 0.97 1.62

1976 1.09 1.60 1.93 1.62 1.94 3.30 10.10 5.90 0.64 0.72 0.84 1.10 2.56

1977 1.40 1.62 1.70 2.20 2.46 1.73 1.94 3.40 2.01 0.80 1.03 1.22 1.79

1978 1.67 3.31 2.50 2.06 1.66 2.01 1.07 0.99 0.85 0.90 0.99 0.84 1.57
382

14-0.000-1M KUNDUZ RIVER AT KULUKH TEPA

(U.S. Geological Survey identification number: 365900068180000)

LOCATION: Lat 36o59'N., long 68o18'E.

DRAINAGE AREA: 37,100 km2.

ELEVATION: 320 meters above mean sea level.

PERIOD OF RECORD: October 1, 1965 to September 30, 1978.

GAGE: Water-stage recorder. Staff gage at same site and datum prior to 1969 water year.

0

20

40

60

80

100

120

140

160

180

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
383

14-0.000-1M KUNDUZ RIVER AT KULUKH TEPA, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 101 1970 40.9 1975 71.0 16.6 0.23 5.57

November 103 1970 61.4 1973 84.1 11.4 0.14 6.60

December 95.1 1969 66.3 1973 81.8 9.05 0.11 6.42

January 80.7 1969 58.3 1975 69.9 8.36 0.12 5.49

February 74.1 1970 53.8 1975 65.8 5.88 0.09 5.17

March 96.3 1969 55.2 1975 74.0 10.8 0.15 5.81

April 179 1969 30.8 1977 76.9 39.5 0.51 6.04

May 236 1973 28.1 1974 141 58.5 0.41 11.1

June 618 1968 148 1971 320 132 0.41 25.1

July 408 1968 12.0 1971 204 112 0.55 16.0

August 154 1969 5.47 1974 54.7 46.4 0.85 4.29

September 60.4 1969 4.44 1974 30.8 14.6 0.47 2.41

Annual 168 1969 66.7 1974 106 29.9 0.28 100
384

14-0.000-1M KUNDUZ RIVER AT KULUKH TEPA, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 34.6 60.0 62.1 52.3 51.7 51.2 19.5 15.0 86.6 11.3 3.88 5.04 17.6

90 41.3 64.3 66.1 56.1 56.1 55.6 25.7 25.9 125 39.8 7.50 11.7 28.1

85 47.6 71.4 69.0 58.4 58.2 58.5 32.9 33.0 163 64.9 11.5 16.1 38.4

80 51.6 75.3 71.8 60.8 59.8 61.0 38.5 49.4 189 82.2 15.2 17.6 49.0

75 55.3 76.9 74.5 63.1 61.6 63.2 43.6 63.5 207 97.8 19.9 19.5 56.0

70 58.9 79.4 76.5 64.6 63.1 65.2 48.6 77.6 220 113 22.9 21.6 61.3

65 61.9 81.6 78.2 65.8 64.1 67.0 54.0 89.2 236 126 28.0 23.8 64.8

60 64.0 83.0 81.4 67.6 64.9 68.7 59.4 103 255 144 31.8 25.4 68.3

55 66.1 84.2 83.4 69.3 65.7 70.3 64.9 117 275 162 35.2 27.0 71.9

50 69.9 85.0 84.3 70.5 66.4 71.8 69.5 132 292 180 38.9 28.5 75.6

45 72.9 85.9 85.2 71.6 67.2 73.8 74.2 148 309 197 42.1 30.5 79.4

40 75.0 86.8 86.1 73.1 67.9 75.9 79.2 166 327 217 45.8 32.4 83.2

35 77.2 88.0 87.1 74.7 68.8 78.8 84.2 184 354 241 50.7 34.1 88.2

30 80.8 89.3 88.5 76.2 70.0 82.4 90.9 197 388 269 62.8 35.9 94.2

25 85.1 91.0 90.0 78.1 71.0 85.6 97.9 211 414 297 71.3 37.7 100

20 90.2 92.9 91.2 79.5 72.1 88.2 106 229 446 328 83.9 41.1 122

15 96.3 95.3 92.4 81.2 73.2 91.3 115 247 485 368 101 47.9 176

10 104 98.3 94.4 83.4 75.0 95.2 129 266 551 410 134 56.0 238

5 115 109 98.4 85.8 77.3 102 168 301 664 471 182 66.9 339
385

14-0.000-1M KUNDUZ RIVER AT KULUKH TEPA, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 252 221 216 188 166

0.95 1.05 306 273 262 227 199

0.90 1.11 340 307 292 252 221

0.80 1.25 388 353 333 288 252

0.50 2 505 464 432 378 329

0.20 5 665 614 568 508 440

0.10 10 773 713 659 599 517

0.04 25 911 837 775 718 619

0.02 50 1,020 929 863 812 698

0.01 100 1,120 1,020 951 908 779

0.005 200 1,230 1,110 1,040 1,010 865

0.002 500 1,380 ng ng ng ng

14-0.000-1M KUNDUZ RIVER AT KULUKH TEPA, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 3.11 3.12 3.12 3.38 3.73 6.27 14.7 24.4 39.6

0.10 10 4.92 4.97 5.02 5.40 6.09 9.79 19.9 30.4 44.5

0.20 5 8.14 8.28 8.44 9.00 10.3 15.8 27.6 38.4 50.5

0.50 2 18.3 18.8 19.3 20.3 23.4 32.7 45.8 55.3 62.5
386

14-0.000-1M KUNDUZ RIVER AT KULUKH TEPA, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 40.4 46.6 50.0 52.6 5.84 7.21 8.77 16.9

0.10 10 43.8 49.3 52.5 55.2 8.81 11.3 14.1 23.6

0.20 5 48.0 52.8 55.7 58.3 13.9 18.3 22.9 33.5

0.50 2 56.2 59.4 61.9 64.2 29.3 37.7 45.6 56.4

June-July-August September-October-November

0.05 20 3.38 3.39 3.68 5.12 4.16 4.23 4.67 7.04

0.10 10 5.60 5.66 6.13 8.51 6.53 6.75 7.62 10.9

0.20 5 9.72 9.98 10.8 15.1 10.5 11.0 12.6 17.1

0.50 2 23.4 25.3 28.1 39.2 21.6 22.8 25.6 31.8

14-0.000-1M KUNDUZ RIVER AT KULUKH TEPA, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1966 June 21, 1966 739 1968 June 13, 1968 830

1967 June 13, 1967 588 1977 May 29, 1977 800

1968 June 13, 1968 830 1966 June 21, 1966 739

1969 June 22, 1969 640 1969 June 22, 1969 640

1970 June 2, 1970 348 1967 June 13, 1967 588

1971 May 30, 1971 340 1973 June 11, 1973 531

1972 June 25, 1972 503 1972 June 25, 1972 503

1973 June 11, 1973 531 1975 June 19, 1975 450

1974 June 18, 1974 337 1976 June 6, 1976 450

1975 June 19, 1975 450 1978 June 9, 1978 390

1976 June 6, 1976 450 1970 June 2, 1970 348

1977 May 29, 1977 800 1971 May 30, 1971 340

1978 June 9, 1978 390 1974 June 18, 1974 337
387

14-0.000-1M KUNDUZ RIVER AT KULUKH TEPA, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[Data may not be rounded in accordance with U.S. Geological Survey publication standards] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1966 69.8 87.0 86.2 71.9 61.8 83.8 95.5 157 428 157 64.8 37.0 117

1967 86.5 93.8 80.0 71.1 68.7 66.5 60.6 112 334 258 78.4 32.5 112

1968 70.1 83.2 87.1 79.6 67.7 62.2 85.7 174 618 408 142 46.2 160

1969 78.7 88.7 95.1 80.7 70.9 96.3 179 234 484 390 154 60.4 168

1970 101 103 91.1 80.3 74.1 76.3 63.2 150 198 107 37.4 47.8 94.2

1971 75.1 80.6 88.7 75.6 67.8 69.0 62.9 138 148 12.0 10.8 23.8 71.0

1972 52.8 77.5 67.3 60.5 55.9 66.0 68.1 90.0 285 166 44.2 19.8 87.7

1973 51.0 61.4 66.3 59.0 65.2 84.7 130 236 364 230 39.7 31.6 118

1974 87.1 76.7 81.8 61.4 63.4 73.7 38.9 28.1 181 99.9 5.47 4.44 66.7

1975 40.9 69.8 73.1 58.3 53.8 55.2 66.6 150 304 236 52.2 24.6 98.9

1976 79.5 98.7 75.2 64.1 66.4 73.2 55.4 137 211 261 42.7 25.9 99.3

1977 60.6 83.6 82.5 70.9 68.6 73.4 30.8 68.6 314 182 13.0 18.2 88.9

1978 69.2 88.8 89.0 75.6 71.4 81.0 63.1 161 286 140 26.2 27.5 98.2
388

14-0.000-2M KUNDUZ RIVER AT CHAR DARA

(U.S. Geological Survey identification number: 364200068500000)

LOCATION: Lat 36o42'N., long 68o50'E.

DRAINAGE AREA: 24,820 km2.

ELEVATION: 401 meters above mean sea level.

PERIOD OF RECORD: August 5, 1964 to September 30, 1978.

GAGE: Water-stage recorder.

0

10

20

30

40

50

60

70

80

90

100

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
389

14-0.000-2M KUNDUZ RIVER AT CHAR DARA, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 41.7 1969 10.0 1972 27.2 8.89 0.33 4.25

November 49.2 1970 19.7 1972 32.6 7.94 0.24 5.10

December 44.9 1969 21.0 1972 35.0 6.00 0.17 5.46

January 40.8 1969 21.0 1972 32.4 4.81 0.15 5.06

February 40.4 1969 21.0 1972 31.4 4.48 0.14 4.90

March 42.7 1966 24.6 1972 33.8 4.63 0.14 5.28

April 77.8 1973 16.8 1974 37.9 16.9 0.45 5.92

May 159 1973 45.1 1974 91.6 33.5 0.37 14.3

June 406 1968 72.2 1971 186 88.4 0.48 29.0

July 203 1968 13.1 1971 93.1 57.0 0.61 14.6

August 66.3 1968 2.16 1974 23.6 20.1 0.85 3.69

September 32.7 1968 2.59 1974 16.1 8.76 0.54 2.51

Annual 91.9 1968 31.2 1974 53.4 16.6 0.31 100
390

14-0.000-2M KUNDUZ RIVER AT CHAR DARA, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 10.3 19.2 21.4 21.4 21.3 23.9 9.80 11.0 57.7 9.26 1.89 3.05 7.80

90 15.3 21.5 29.0 27.3 26.4 25.2 15.3 18.3 78.3 15.9 2.83 4.09 13.5

85 17.5 23.6 30.6 27.9 27.4 27.3 19.2 30.9 89.0 24.5 3.49 6.82 19.1

80 18.8 26.5 31.7 28.6 28.0 28.7 22.0 35.1 96.9 32.4 4.83 8.05 22.6

75 20.6 28.4 32.2 29.6 29.2 29.9 23.9 38.8 106 38.7 5.93 10.1 25.4

70 21.8 29.7 32.6 30.1 29.9 30.7 25.3 44.2 121 46.6 7.66 11.6 27.5

65 23.5 30.6 33.1 30.8 30.3 31.5 27.5 53.4 140 55.7 10.1 12.4 29.5

60 25.1 31.1 33.6 31.7 30.6 32.2 29.4 66.8 150 64.6 11.8 13.2 31.1

55 26.8 31.7 34.1 32.3 31.0 32.6 31.0 78.6 158 73.2 14.1 13.9 32.4

50 27.6 32.4 34.6 32.8 31.5 33.0 32.7 86.2 172 79.4 18.2 14.8 33.6

45 29.1 33.2 35.0 33.2 32.0 33.7 34.6 94.4 185 86.8 20.5 16.2 34.8

40 29.8 34.2 36.2 33.6 32.3 34.6 36.9 103 201 96.5 23.0 17.6 36.1

35 30.4 35.2 36.8 34.0 32.5 35.5 39.5 111 223 106 26.2 18.4 38.5

30 31.4 36.1 37.9 34.6 33.1 36.6 44.7 121 234 119 29.5 19.2 41.8

25 32.8 37.5 38.4 35.3 34.1 38.0 48.4 133 245 135 34.2 20.6 47.0

20 35.7 39.0 39.4 36.0 35.1 38.8 52.6 146 259 151 39.2 22.9 61.7

15 38.3 40.1 41.3 36.9 36.0 40.0 58.0 159 275 172 45.7 27.7 90.2

10 39.5 42.7 43.8 38.9 37.5 42.8 65.1 175 296 197 54.8 30.8 133

5 42.1 48.1 45.6 40.8 39.0 45.6 81.2 199 346 223 70.8 33.2 191
391

14-0.000-2M KUNDUZ RIVER AT CHAR DARA, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 113 105 95.7 80.6 74.7

0.95 1.05 149 136 124 107 97.3

0.90 1.11 172 156 142 124 112

0.80 1.25 202 184 168 148 133

0.50 2 271 249 230 209 185

0.20 5 354 333 316 295 258

0.10 10 403 387 372 354 307

0.04 25 459 451 444 428 370

0.02 50 498 498 497 485 418

0.01 100 535 1

543 550 542 466

0.005 200 569 1

587 603 600 515

0.002 500 612 ng ng ng ng

1

Data does not fit log-Pearson Type III curve, use with caution.

14-0.000-2M KUNDUZ RIVER AT CHAR DARA, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 1.68 1.7 1.75 1.84 2.17 2.92 6.02 8.37 13.9

0.10 10 2.78 2.81 2.88 3.01 3.48 4.61 8.25 11.1 16.7

0.20 5 4.78 4.84 4.93 5.14 5.81 7.56 11.7 14.9 20.4

0.50 2 11.1 11.4 11.6 12.0 13.1 16.3 20.3 23.8 27.7
392

14-0.000-2M KUNDUZ RIVER AT CHAR DARA, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 22.5 22.7 22.9 23.2 5.68 6.77 7.49 10.5

0.10 10 23.8 24.1 24.4 25.0 7.50 9.06 10.2 13.8

0.20 5 25.4 25.8 26.3 27.1 10.2 12.4 14.3 18.5

0.50 2 28.4 29.1 29.8 31.0 17.3 20.6 23.5 28.2

June-July-August September-October-November

0.05 20 1.34 1.42 1.49 1.98 1.98 2.06 2.16 3.76

0.10 10 2.28 2.40 2.50 3.29 3.30 3.49 3.68 5.53

0.20 5 4.13 4.30 4.50 5.87 5.66 6.08 6.39 8.36

0.50 2 11.0 11.4 12.1 16.0 12.7 13.6 14.2 15.8

14-0.000-2M KUNDUZ RIVER AT CHAR DARA, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1965 June 17, 1965 290 1968 June 12, 1968 500

1966 June 20, 1966 340 1966 June 20, 1966 340

1967 June 12, 1967 297 1973 June 11, 1973 340

1968 June 12, 1968 500 1969 June 21, 1969 331

1969 June 21, 1969 331 1976 May 25, 1976 308

1970 May 20, 1970 190 1967 June 12, 1967 297

1971 May 22, 1971 200 1965 June 17, 1965 290

1972 June 18, 1972 275 1972 June 18, 1972 275

1973 June 11, 1973 340 1977 May 29, 1977 272

1974 June 19, 1974 146 1975 June 19, 1975 269

1975 June 19, 1975 269 1971 May 22, 1971 200

1976 May 25, 1976 308 1970 May 20, 1970 190

1977 May 29, 1977 272 1978 May 25, 1978 156

1978 May 25, 1978 156 1974 June 19, 1974 146
393

14-0.000-2M KUNDUZ RIVER AT CHAR DARA, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[--, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1964 -- -- -- -- -- -- -- -- -- -- -- 15.4 --

1965 18.6 22.5 29.8 28.6 28.7 29.1 37.7 57.9 211 172 48.1 23.2 59.0

1966 29.5 31.9 37.0 34.5 34.4 42.7 58.3 116 240 83.3 31.5 18.9 63.1

1967 32.5 33.7 33.9 32.9 36.0 34.3 30.3 80.5 213 135 37.4 15.7 59.7

1968 34.7 41.2 40.2 34.5 29.8 27.8 47.6 140 406 203 66.3 32.7 91.9

1969 41.7 40.6 44.9 40.8 40.4 39.9 48.3 107 237 161 49.0 31.8 73.6

1970 40.0 49.2 43.3 38.8 33.0 37.1 34.9 86.3 96.2 51.2 24.7 21.1 46.4

1971 30.8 34.1 35.5 33.5 31.7 33.1 41.2 108 72.2 13.1 3.86 5.41 36.8

1972 10.0 19.7 21.0 21.0 21.0 24.6 20.5 51.4 215 92.9 14.6 12.7 43.6

1973 24.4 29.3 31.0 28.5 28.0 35.4 77.8 159 242 88.4 17.4 20.4 65.1

1974 29.6 31.6 32.7 31.3 29.2 33.8 16.8 45.1 90.9 29.1 2.16 2.59 31.2

1975 15.5 22.6 32.0 28.7 29.4 34.9 32.5 93.8 188 101 14.6 8.77 50.2

1976 25.4 33.9 36.7 33.4 34.3 34.0 43.5 99.0 125 88.6 12.8 12.3 48.3

1977 25.8 30.2 33.4 32.6 31.9 31.9 17.0 54.6 165 48.7 5.87 10.8 40.5

1978 22.1 36.4 38.2 34.4 31.8 34.8 24.4 83.6 96.2 36.5 2.53 9.46 37.5
394

14-0.000-3M KUNDUZ RIVER AT GERDAB

(U.S. Geological Survey identification number: 362200068520000)

LOCATION: Lat 36o22'N., long 68o52'E.

DRAINAGE AREA: 22,930 km2.

ELEVATION: 464 meters above mean sea level.

PERIOD OF RECORD: April 21, 1964 to September 30, 1978.

GAGE: Staff gage. Water-stage recorder at same site and datum during the 1978 water year.

0

20

40

60

80

100

120

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
395

14-0.000-3M KUNDUZ RIVER AT GERDAB, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 51.5 1969 23.3 1972 38.8 8.17 0.21 4.95

November 56.8 1970 29.4 1972 41.7 7.49 0.18 5.33

December 51.4 1969 28.4 1972 42.3 5.53 0.13 5.4

January 44.8 1969 28.3 1972 39.1 4.58 0.12 4.99

February 44.7 1974 29 1972 37.4 3.97 0.11 4.77

March 47.3 1970 31.1 1972 39 4.95 0.13 4.97

April 93.6 1973 27.1 1972 51.2 18.2 0.36 6.53

May 184 1973 63.5 1974 112 34.3 0.31 14.3

June 400 1968 77.5 1971 204 82.5 0.4 26

July 239 1968 18.9 1971 112 60 0.54 14.3

August 92.4 1968 10.6 1971 37.5 22.8 0.61 4.79

September 48.6 1968 13.5 1971 28.9 10.6 0.37 3.69

Annual 105 1968 43.1 1971 65.5 17.2 0.26 100
396

14-0.000-3M KUNDUZ RIVER AT GERDAB, Continued 

Monthly and annual flow duration, in cubic meters per second 

[Data may not be rounded in accordance with U.S. Geological Survey publication standards] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 23.4 30.2 28.7 28.8 29.4 29.6 22.8 26.6 67.7 19.9 11 12.3 19.7

90 29.2 31.1 36.4 33.7 32.1 31.4 28 37 88.7 29.4 14.4 15 26.5

85 30.4 33.5 38.1 34.5 33 32.1 30.6 47.1 102 37.8 15.3 17.3 29.8

80 32.8 34.8 38.5 35.1 33.6 33.1 32.5 53.7 113 45.2 16.6 19.5 32.2

75 33.4 36.2 38.9 35.9 34.3 34 34.2 58 123 55.2 18.1 20.8 34.3

70 34 38.4 39.5 36.4 35 34.8 36.7 66.5 148 66 20.1 22.1 36

65 34.6 39.6 40.5 36.8 35.6 35.7 38.1 76 163 74.8 23.6 23.9 37.4

60 35.4 40.1 41.7 37.4 35.9 36.7 39.5 86 174 80.4 26.9 25.3 38.9

55 36.4 40.5 42.3 39.3 36.3 37.7 41 95.2 185 88.1 28.8 26.1 40.4

50 37.3 40.9 42.8 40.1 37.1 38.9 42.6 105 198 95.4 30.7 27.1 41.8

45 38.9 41.5 43.3 40.9 37.8 39.6 45.1 113 212 104 33.2 28.3 43.3

40 40.3 42.2 43.9 41.5 38.7 40.2 50.2 123 228 114 36.1 29.8 44.7

35 41.8 43.3 44.7 42 39.1 40.7 54.8 131 244 130 41.2 31.5 47.5

30 44.3 46 45.6 42.5 39.7 41.2 58.1 141 257 143 45.1 33.2 50.3

25 46.8 47.2 46.4 43 40.4 41.9 62.7 156 266 157 48.4 36.5 57.1

20 48.1 48.3 46.9 43.4 41.4 43 67.4 171 275 174 53.6 42.2 78.9

15 48.9 49.5 47.5 43.8 42.5 45.3 73.4 188 293 195 62.5 43.6 110

10 50.2 51.8 48.5 44.3 43.6 48.2 85.3 202 320 216 72 45.3 154

5 51.6 55.2 51.2 45.5 44.2 53.7 106 230 372 250 88.3 47.7 217
397

14-0.000-3M KUNDUZ RIVER AT GERDAB, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 181 159 134 113 101

0.95 1.05 209 186 162 139 125

0.90 1.11 226 203 180 157 140

0.80 1.25 249 226 204 180 161

0.50 2 301 280 261 237 211

0.20 5 369 349 336 313 279

0.10 10 413 394 383 363 323

0.04 25 466 449 442 426 379

0.02 50 504 489 485 473 420

0.01 100 542 529 528 519 462

0.005 200 580 1

569 571 566 503

0.002 500 631 ng ng ng ng

1

Data does not fit log-Pearson Type III curve, use with caution.

14-0.000-3M KUNDUZ RIVER AT GERDAB, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 7.95 8.3 8.59 9.47 10.8 12.6 16.1 18.9 23.4

0.10 10 10.2 10.6 10.9 11.7 13.2 15.6 19.3 22.3 26.6

0.20 5 13.4 13.9 14.2 15 16.7 19.7 23.6 26.7 30.5

0.50 2 21.3 21.8 22.3 23 24.9 28.6 32.2 35 37.5
398

14-0.000-3M KUNDUZ RIVER AT GERDAB, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 26.6 28.4 29.1 29.8 13 16.1 17.8 23.8

0.10 10 28.1 29.5 30.3 31.4 16.2 19.4 21.2 26.5

0.20 5 30 31 31.9 33.3 20.4 23.5 25.3 29.8

0.50 2 33.7 34.2 35 36.8 28.4 30.9 32.7 36

June-July-August September-October-November

0.05 20 8.24 10.1 10.4 11.6 8.49 9.18 10.2 14.3

0.10 10 10.5 12.3 12.7 14.4 10.7 11.4 12.5 16.7

0.20 5 13.9 15.6 16.3 18.7 13.9 14.6 15.8 19.9

0.50 2 23.1 24.8 26.1 31.1 22.1 22.9 24.2 27.7
399

14-0.000-3M KUNDUZ RIVER AT GERDAB, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1964 June 29, 1964 275 1968 June 12, 1968 498

1965 June 23, 1965 317 1969 June 21, 1969 376

1966 June 19, 1966 358 1973 June 15, 1973 376

1967 June 8, 1967 274 1966 June 19, 1966 358

1968 June 12, 1968 498 1977 May 28, 1977 350

1969 June 21, 1969 376 1976 June 5, 1976 328

1970 May 19, 1970 224 1965 June 23, 1965 317

1971 May 21, 1971 252 1972 June 15, 1972 314

1972 June 15, 1972 314 1975 June 19, 1975 303

1973 June 15, 1973 376 1964 June 29, 1964 275

1974 June 19, 1974 220 1967 June 8, 1967 274

1975 June 19, 1975 303 1971 May 21, 1971 252

1976 June 5, 1976 328 1970 May 19, 1970 224

1977 May 28, 1977 350 1974 June 19, 1974 220

1978 June 6, 1978 210 1978 June 6, 1978 210
400

14-0.000-3M KUNDUZ RIVER AT GERDAB, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[--, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1964 -- -- -- -- -- -- -- 74.5 196 138 40.3 22.1 --

1965 32.0 32.7 38.5 35.8 37.1 36.9 50.6 85.5 239 199 60.5 32.4 73.4

1966 39.2 41.1 43.2 39.0 36.1 46.8 72.6 134 263 105 49.2 43.4 76.1

1967 49.4 48.9 46.3 43.9 43.8 41.2 43.4 105 232 146 53.4 28.8 73.6

1968 44.6 42.1 47.3 41.9 35.8 34.2 66.5 164 400 239 92.4 48.6 105

1969 51.5 50.3 51.4 44.8 41.0 41.9 60.4 133 267 168 66.3 44.5 85.2

1970 49.6 56.8 46.5 42.2 38.6 47.3 49.1 108 110 58.0 30.5 29.8 55.6

1971 35.5 37.7 38.5 36.7 34.6 37.2 48.1 128 77.5 18.9 10.6 13.5 43.1

1972 23.3 29.4 28.4 28.3 29.0 31.1 27.1 68.9 238 110 22.4 18.9 54.5

1973 30.4 33.7 39.2 34.4 36.1 40.1 93.6 184 263 108 32.7 38.0 77.8

1974 43.0 40.4 44.5 43.4 44.7 44.5 27.6 63.5 116 52.3 17.5 16.5 46.1

1975 34.3 38.1 39.0 40.6 34.0 33.9 51.1 119 204 115 29.4 24.8 63.6

1976 39.7 44.2 42.0 36.2 38.0 38.0 55.0 116 152 107 24.5 23.7 59.7

1977 37.2 40.8 43.0 37.7 36.8 34.2 32.7 81.9 183 61.5 16.4 24.9 52.4

1978 33.0 48.1 45.0 42.7 37.5 38.4 38.3 117 120 49.6 16.9 23.7 50.9
401

14-0.000-4M KUNDUZ RIVER AT BAGHLAN

(U.S. Geological Survey identification number: 360600068400000)

LOCATION: Lat 36o06'N., long 68o40'E.

DRAINAGE AREA: 19,740 km2.

ELEVATION: 562 meters above mean sea level.

PERIOD OF RECORD: April 7, 1968 to September 30, 1978.

GAGE: Water-stage recorder.

0

10

20

30

40

50

60

70

80

90

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
402

14-0.000-4M KUNDUZ RIVER AT BAGHLAN, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 43.8 1969 21.0 1972 32.5 7.15 0.22 4.60

November 48.5 1970 27.0 1972 35.2 6.73 0.19 4.99

December 45.1 1969 25.9 1972 34.8 5.31 0.15 4.94

January 38.4 1970 26.0 1972 32.0 3.49 0.11 4.54

February 35.4 1970 24.8 1978 29.8 3.40 0.11 4.23

March 37.7 1970 26.4 1972 32.3 3.77 0.12 4.58

April 82.2 1973 22.0 1972 43.4 17.4 0.40 6.15

May 169 1973 58.9 1972 111 35.0 0.32 15.7

June 375 1968 79.8 1971 184 85.6 0.46 26.1

July 248 1968 25.1 1971 102 64.7 0.64 14.4

August 97.1 1968 15.0 1971 39.7 25.4 0.64 5.63

September 48.9 1968 15.8 1971 29.1 10.6 0.37 4.13

Annual 82.3 1969 41.0 1971 55.0 12.9 0.23 100
403

14-0.000-4M KUNDUZ RIVER AT BAGHLAN, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 20.8 27.5 25.9 25.8 24.4 24.2 18.9 27.7 56.7 24.8 14.9 15.1 20.8

90 24.2 27.9 28.6 27.7 25.0 25.7 21.6 34.5 85.9 28.3 18.6 19.3 23.9

85 27.4 28.7 31.0 29.0 25.9 26.6 25.0 43.6 96.5 34.0 19.7 20.4 26.0

80 27.9 29.8 32.0 29.5 26.5 28.0 27.3 52.1 106 44.9 20.9 20.9 27.5

75 28.4 30.2 32.3 30.5 26.9 28.7 29.0 56.1 114 48.6 22.0 21.3 29.1

70 28.8 30.7 32.5 30.9 27.9 29.2 31.1 67.6 122 55.7 23.1 22.3 30.0

65 29.2 31.2 32.8 31.2 28.3 29.7 32.4 80.9 133 62.0 24.7 23.3 30.8

60 29.5 31.8 33.1 31.4 28.9 30.2 33.7 90.2 146 68.3 26.7 24.1 31.7

55 29.8 33.0 33.3 31.6 29.2 30.8 35.4 101 157 74.9 29.0 24.7 32.7

50 30.2 33.7 33.6 31.8 29.9 31.4 37.0 112 169 81.0 31.2 25.5 34.1

45 31.2 34.4 34.0 31.9 30.2 32.1 38.7 120 179 88.6 33.1 26.4 35.4

40 32.0 35.5 34.4 32.2 30.6 33.5 40.6 127 189 96.9 35.3 28.8 37.4

35 32.8 36.7 34.9 32.5 31.0 34.3 44.0 136 198 107 38.4 30.5 39.8

30 35.2 38.2 35.7 32.9 32.0 34.9 48.7 143 224 122 41.4 33.1 43.7

25 37.7 39.3 37.1 33.4 32.7 35.7 50.7 150 242 136 44.2 34.7 49.1

20 39.4 41.1 39.8 34.8 33.5 36.5 57.3 161 260 151 53.4 35.8 65.7

15 41.9 44.2 41.7 36.0 34.0 37.3 63.5 172 277 168 65.9 44.1 95.2

10 44.1 45.4 42.9 37.9 35.0 39.0 77.5 191 307 198 83.9 45.9 128

5 45.2 48.9 45.2 39.1 35.3 40.7 90.3 224 411 243 94.8 49.1 177
404

14-0.000-4M KUNDUZ RIVER AT BAGHLAN, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 166 143 122 106 97.0

0.95 1.05 192 167 145 127 115

0.90 1.11 208 181 158 140 127

0.80 1.25 231 200 177 158 142

0.50 2 286 242 219 199 178

0.20 5 362 292 274 251 225

0.10 10 412 322 308 285 255

0.04 25 477 358 349 327 291

0.02 50 525 383 379 357 318

0.01 100 574 1

406 409 387 345

0.005 200 625 1

429 438 417 371

0.002 500 694 ng ng ng ng

1

Data does not fit log-Pearson Type III curve, use with caution.

14-0.000-4M KUNDUZ RIVER AT BAGHLAN, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 13.3 13.4 13.7 14.0 14.7 16.2 18.2 19.7 22.5

0.10 10 14.6 14.8 15.1 15.6 16.6 18.5 20.3 22.0 24.2

0.20 5 16.5 16.7 17.1 17.7 19.1 21.3 23.0 24.7 26.3

0.50 2 21.1 21.3 21.8 22.6 24.4 26.6 28.1 29.6 30.6
405

14-0.000-4M KUNDUZ RIVER AT BAGHLAN, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 21.8 22.6 23.1 24.1 16.1 17.1 18.3 22.2

0.10 10 22.9 23.6 24.3 25.2 18.1 19.1 20.2 23.9

0.20 5 24.3 24.9 25.7 26.7 20.6 21.6 22.7 26.1

0.50 2 27.3 27.8 28.6 29.5 25.2 26.2 27.2 30.2

June-July-August September-October-November

0.05 20 14.2 14.4 14.6 15.2 13.9 14.1 14.9 16.4

0.10 10 15.6 15.9 16.3 17.4 15.7 15.9 16.8 18.3

0.20 5 17.9 18.3 19.0 21.0 18.2 18.5 19.5 21.0

0.50 2 24.9 25.6 27.3 31.8 24.3 24.7 25.9 27.3

14-0.000-4M KUNDUZ RIVER AT BAGHLAN, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1968 June 25, 1968 492 1968 June 25, 1968 492

1969 June 17, 1969 337 1972 June 22, 1972 338

1970 May 22, 1970 222 1969 June 17, 1969 337

1971 May 27, 1971 235 1973 June 9, 1973 331

1972 June 22, 1972 338 1977 May 29, 1977 327

1973 June 9, 1973 331 1976 May 24, 1976 320

1974 June 18, 1974 200 1975 June 16, 1975 286

1975 June 16, 1975 286 1971 May 27, 1971 235

1976 May 24, 1976 320 1970 May 22, 1970 222

1977 May 29, 1977 327 1978 June 5, 1978 214

1978 June 5, 1978 214 1974 June 18, 1974 200
406

14-0.000-4M KUNDUZ RIVER AT BAGHLAN, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[--, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1968 -- -- -- -- -- -- -- 156 375 248 97.1 48.9 --

1969 43.8 43.6 45.1 36.8 33.7 35.0 59.9 122 261 180 78.4 47.3 82.3

1970 43.8 48.5 41.8 38.4 35.4 37.7 46.0 106 112 61.0 37.3 31.9 53.4

1971 30.6 32.0 33.3 30.5 28.3 32.5 45.5 123 79.8 25.1 15.0 15.8 41.0

1972 21.0 27.0 25.9 26.0 25.4 26.4 22.0 58.9 217 128 37.9 23.8 53.2

1973 29.2 30.7 34.3 32.1 30.6 34.6 82.2 169 242 98.0 40.3 34.9 71.5

1974 37.3 37.6 34.7 32.7 32.3 36.7 26.7 63.8 111 53.6 25.3 22.4 42.8

1975 28.3 29.8 32.8 32.0 29.2 29.3 42.0 114 184 104 35.3 25.8 57.3

1976 30.3 30.2 31.5 30.5 30.3 32.0 42.2 116 148 104 28.8 23.9 54.0

1977 31.3 36.6 35.5 31.5 28.0 30.9 31.8 71.3 170 61.0 20.7 23.9 47.7

1978 29.1 35.9 33.4 29.9 24.8 27.7 35.6 116 125 56.2 21.0 21.8 46.5
407

14-0.000-5S KUNDUZ RIVER AT PUL-I-KHUMRI

(U.S. Geological Survey identification number: 355600068430000)

LOCATION: Lat 35o56'N., long 68o43'E.

DRAINAGE AREA: 17,405 km2

.

ELEVATION: 639 meters above mean sea level.

PERIOD OF RECORD: Monthly mean values April 1, 1950 to September 30 1959. Daily mean 

values October 1, 1959 to March 26, 1968.

GAGE: Water-stage recorder. Head works gage prior to January 1966 at hydropower station 2 km 

downstream.

0

10

20

30

40

50

60

70

80

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
408

14-0.000-5S KUNDUZ RIVER AT PUL-I-KHUMRI, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 46.5 1968 26.6 1962 34.6 6.70 0.19 4.50

November 43.6 1968 25.3 1965 31.9 6.23 0.20 4.15

December 39.9 1968 22.6 1964 29.4 6.17 0.21 3.83

January 36.6 1966 20.0 1964 27.5 6.05 0.22 3.58

February 35.5 1966 20.6 1964 26.7 4.70 0.18 3.48

March 34.7 1966 20.3 1964 26.0 4.27 0.16 3.38

April 53.9 1966 26.5 1961 36.9 9.55 0.26 4.80

May 139 1966 67.5 1964 95.1 21.9 0.23 12.4

June 261 1963 153 1964 224 36.9 0.16 29.2

July 229 1960 97.2 1966 143 53.7 0.38 18.6

August 81.8 1960 40.2 1963 56.7 15.3 0.27 7.38

September 44.2 1966 28.8 1963 36.5 6.37 0.17 4.74

Annual 74.3 1960 49.4 1964 63.6 9.31 0.15 100
409

14-0.000-5S KUNDUZ RIVER AT PUL-I-KHUMRI, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 22.3 23.4 21.2 20.2 20.2 20.0 22.4 41.7 111 65.8 31.1 26.8 21.4

90 25.4 24.4 22.9 20.4 20.4 20.2 24.0 53.6 141 74.7 32.7 27.5 23.1

85 27.8 25.2 23.5 21.1 22.2 21.5 24.9 60.0 153 80.4 36.3 28.2 24.1

80 29.1 25.9 24.2 22.4 22.8 21.8 25.6 66.0 163 84.9 38.4 28.6 25.1

75 30.2 27.0 24.6 23.1 23.1 22.7 26.3 69.8 171 90.4 42.4 29.5 26.3

70 31.0 27.5 24.9 23.5 23.4 23.1 26.9 72.6 182 96.1 45.4 30.6 27.7

65 31.6 28.4 25.3 23.7 23.6 23.7 27.5 75.1 198 103 48.2 31.6 29.3

60 32.1 29.2 25.9 24.2 24.1 24.0 28.7 78.1 211 113 50.6 33.0 31.0

55 32.6 30.1 26.5 24.7 24.6 24.5 30.5 81.7 220 122 52.2 34.5 32.7

50 33.2 31.2 27.4 25.2 25.2 25.0 32.1 86.4 232 130 54.0 36.8 34.5

45 34.5 31.8 28.4 26.0 26.8 25.6 33.5 90.3 242 136 56.0 37.6 36.3

40 35.0 33.0 29.8 27.5 27.6 26.1 35.1 95.1 252 141 58.5 40.0 39.5

35 36.4 34.4 31.9 29.6 29.0 27.0 36.7 101 261 148 61.2 40.9 43.7

30 37.8 34.7 34.5 33.6 29.7 27.7 40.2 107 269 156 63.3 42.0 53.6

25 40.2 35.1 35.0 34.4 30.4 28.5 44.2 115 277 178 65.2 42.9 68.3

20 42.5 38.2 35.7 34.9 31.0 29.3 48.3 126 285 198 69.9 43.5 84.8

15 43.8 39.6 36.9 35.5 31.8 31.8 53.0 138 295 223 76.1 44.4 116

10 44.9 42.4 38.6 36.2 32.7 34.2 59.6 152 306 246 80.9 45.7 159

5 46.2 43.8 40.5 37.1 35.5 34.9 67.5 183 322 283 95.8 47.1 236
410

14-0.000-5S KUNDUZ RIVER AT PUL-I-KHUMRI, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge1 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 235 233 229 191 158

0.95 1.05 265 257 247 213 180

0.90 1.11 280 269 256 225 192

0.80 1.25 299 284 268 241 207

0.50 2 334 311 292 271 238

0.20 5 365 335 317 303 270

0.10 10 380 346 330 320 287

0.04 25 394 358 345 338 306

0.02 50 403 364 355 350 318

0.01 100 410 370 363 361 329

0.005 200 416 375 372 371 340

0.002 500 423 ng ng ng ng

1

Less than 10 years of data used.

14-0.000-5S KUNDUZ RIVER AT PUL-I-KHUMRI, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 18.8 18.9 19.4 19.5 19.6 19.8 19.7 20.1 22.0

0.10 10 19.2 19.6 20.1 20.3 20.3 20.6 20.6 21.1 23.0

0.20 5 19.7 20.4 21.0 21.4 21.4 21.7 21.9 22.5 24.4

0.50 2 21.1 22.2 22.8 23.6 24.1 24.6 25.2 25.9 27.7
411

14-0.000-5S KUNDUZ RIVER AT PUL-I-KHUMRI, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 18.4 19.1 19.4 19.6 19.1 19.8 19.9 20.6

0.10 10 19.1 20.0 20.4 20.6 19.4 20.3 20.5 21.2

0.20 5 20.2 21.3 21.8 22.1 19.9 21.0 21.5 22.3

0.50 2 22.7 24.1 24.8 25.5 21.7 23.1 23.9 24.9

June-July-August September-October-November

0.05 20 25.2 27.4 28.8 35.7 17.3 19.2 20.4 21.7

0.10 10 27.4 30.1 31.8 38.9 18.9 20.8 22.0 23.3

0.20 5 30.6 33.6 35.7 43.2 21.1 23.0 24.2 25.4

0.50 2 37.8 41.6 44.6 53.5 26.5 28.2 29.3 30.3
412

14-0.000-5S KUNDUZ RIVER AT PUL-I-KHUMRI, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest2 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1950 June 15, 1950 403 11960 July 3, 1960 382

1951 May 29, 1951 280 11965 June 22, 1965 368

1952 June 22, 1952 305 1

1966 June 18, 1966 358

1953 June 14, 1953 373 1 1962 June 13, 1962 338

1954 June 4, 1954 406 1

1963 June 8, 1963 320

1955 June 12, 1955 727 1

1961 June 3, 1961 319

1956 July 27, 1956 208 1

1967 June 14, 1967 300

1957 June 12, 1957 416 1

1964 June 28, 1964 264

1958 June 18, 1958 408 1

1959 June 4, 1959 358 1

1960 July 3, 1960 382

1961 June 3, 1961 319

1962 June 13, 1962 338

1963 June 8, 1963 320

1964 June 28, 1964 264

1965 June 22, 1965 368

1966 June 18, 1966 358

1967 June 14, 1967 300

1

Published as a maximum daily discharge.

2 Only instantaneous annual peaks shown.
413

14-0.000-5S KUNDUZ RIVER AT PUL-I-KHUMRI, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[--, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1960 33.1 31.1 27.2 25.1 26.0 24.4 35.5 95.4 241 229 81.8 41.1 74.3

1961 36.6 31.3 29.2 26.4 24.8 25.5 26.5 82.6 191 99.3 41.1 30.0 53.7

1962 26.6 26.8 24.0 23.3 24.0 27.5 48.0 110 216 115 49.3 34.5 60.5

1963 32.3 28.8 26.2 25.2 24.7 24.7 29.3 83.1 261 97.8 40.2 28.8 58.5

1964 30.7 26.1 22.6 20.0 20.6 20.3 29.3 67.5 153 127 45.7 29.8 49.4

1965 27.2 25.3 24.3 22.2 23.2 23.0 36.8 83.9 261 217 71.7 40.8 71.5

1966 34.9 35.0 34.5 36.6 35.5 34.7 53.9 139 232 97.2 57.9 44.2 69.7

1967 43.1 39.0 36.6 34.0 30.5 27.9 35.8 99.5 240 159 65.7 42.4 71.2

1968 46.5 43.6 39.9 34.8 31.2 -- -- -- -- -- -- -- --
414

14-0.000-6M KUNDUZ RIVER AT PUL-I-KONDA SANG

(U.S. Geological Survey identification number: 353600068360000)

LOCATION: Lat 35o36'N., long 68o36'E.

DRAINAGE AREA: 12,610 km2.

ELEVATION: 899 meters above mean sea level.

PERIOD OF RECORD: October 1, 1967 to September 30, 1978.

GAGE: Water-stage recorder.

0.0

5.0

10.0

15.0

20.0

25.0

30.0

35.0

40.0

45.0

50.0

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
415

14-0.000-6M KUNDUZ RIVER AT PUL-I-KONDA SANG, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 29.6 1970 14.2 1978 22.2 4.64 0.21 5.78

November 28.6 1970 14.5 1978 21.3 4.20 0.20 5.56

December 25.9 1970 11.5 1978 19.4 4.00 0.21 5.06

January 23.2 1970 13.8 1978 18.1 2.94 0.16 4.73

February 23.0 1970 14.0 1976 17.6 2.87 0.16 4.58

March 22.8 1974 14.8 1978 18.1 2.71 0.15 4.71

April 29.3 1968 16.7 1971 21.3 4.52 0.21 5.55

May 64.3 1971 35.0 1972 51.4 11.7 0.23 13.4

June 166 1968 41.8 1971 92.6 33.4 0.36 24.2

July 98.9 1968 17.8 1971 52.8 23.6 0.45 13.8

August 42.9 1968 16.2 1977 26.6 8.56 0.32 6.92

September 33.3 1968 15.1 1977 22.2 6.06 0.27 5.78

Annual 46.6 1968 26.0 1978 32.0 6.84 0.21 100
416

14-0.000-6M KUNDUZ RIVER AT PUL-I-KONDA SANG, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 14.3 13.0 11.5 13.8 13.8 14.4 14.1 16.0 40.8 17.6 16.0 15.0 14.5

90 16.7 16.7 13.8 14.4 14.0 14.8 14.8 20.0 52.7 20.5 16.6 15.2 15.2

85 17.7 17.2 15.9 15.2 14.5 15.2 15.2 22.4 59.2 25.0 17.3 16.0 16.0

80 18.2 18.1 16.6 15.7 14.9 15.4 16.0 26.8 65.6 28.9 18.7 17.0 16.6

75 19.1 19.1 17.0 15.8 15.3 15.9 16.5 30.9 70.2 31.5 21.1 17.3 17.3

70 19.3 19.5 17.3 16.1 15.8 16.1 17.0 34.6 73.7 34.4 21.9 18.1 18.1

65 19.6 19.7 18.0 16.7 16.0 16.6 17.4 38.9 76.7 37.6 22.5 18.5 19.0

60 19.8 19.9 18.3 16.9 16.6 16.8 18.2 40.7 80.2 40.9 23.0 19.3 19.9

55 20.4 20.1 19.1 17.2 16.8 17.0 19.4 43.2 84.0 43.9 23.9 19.9 20.7

50 22.8 20.4 19.3 17.6 17.0 17.3 20.0 47.0 87.9 46.5 24.9 20.4 21.7

45 23.2 20.8 19.7 18.2 17.2 18.1 20.5 49.1 91.6 50.3 25.7 23.0 22.8

40 23.6 22.3 20.1 18.7 17.4 18.8 21.1 54.0 95.1 55.3 26.3 23.6 24.0

35 24.5 22.8 20.5 19.0 18.2 19.2 22.0 58.4 101 59.8 27.3 24.1 25.2

30 24.7 23.4 21.5 19.6 19.1 19.6 23.8 62.7 106 63.8 28.1 24.5 27.3

25 25.2 24.2 22.1 20.2 19.8 20.4 24.7 69.0 110 67.4 30.4 25.0 30.8

20 25.8 25.5 22.9 21.0 20.7 20.8 25.7 76.0 119 73.1 33.0 25.5 38.2

15 26.8 27.2 24.6 22.0 21.9 21.1 28.5 80.9 127 83.0 35.2 31.2 52.0

10 28.5 28.1 25.3 22.7 22.2 22.0 30.2 88.5 144 91.9 39.7 32.0 70.6

5 29.4 29.1 25.9 22.9 22.6 22.4 33.0 101 172 109 47.4 33.6 93.0
417

14-0.000-6M KUNDUZ RIVER AT PUL-I-KONDA SANG, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 97.0 81.3 76.4 73.5 66.8

0.95 1.05 104 86.9 81.6 77.6 70.5

0.90 1.11 109 91.1 85.5 80.9 73.4

0.80 1.25 117 97.5 91.6 86.2 78.1

0.50 2 138 116 109 102 92.1

0.20 5 170 145 138 130 117

0.10 10 194 168 160 152 136

0.04 25 227 200 192 184 164

0.02 50 254 226 218 211 188

0.01 100 282 255 247 241 214

0.005 200 313 286 279 274 243

0.002 500 357 ng ng ng ng

14-0.000-6M KUNDUZ RIVER AT PUL-I-KONDA SANG, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 9.39 10.4 10.7 11.4 11.8 12.5 13.1 13.6 14.2

0.10 10 10.1 10.9 11.2 12.0 12.7 13.4 13.9 14.4 15.1

0.20 5 11.0 11.6 12.0 12.8 13.8 14.5 15.0 15.5 16.3

0.50 2 13.0 13.3 13.9 14.8 16.1 16.9 17.3 17.7 19.0
418

14-0.000-6M KUNDUZ RIVER AT PUL-I-KONDA SANG, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 10.9 11.3 11.6 12.0 9.80 11.6 13.0 13.9

0.10 10 11.7 12.1 12.4 13.0 10.9 12.4 13.6 14.5

0.20 5 12.8 13.1 13.5 14.2 12.2 13.5 14.5 15.3

0.50 2 15.1 15.5 15.9 16.7 14.7 15.7 16.3 17.1

June-July-August September-October-November

0.05 20 12.9 13.8 14.5 15.7 12.2 12.4 12.6 14.4

0.10 10 14.5 15.3 15.9 17.2 13.4 13.8 14.0 15.4

0.20 5 16.7 17.3 18.0 19.3 15.0 15.5 15.7 16.8

0.50 2 21.6 21.9 22.7 24.7 18.3 18.9 19.4 20.0

14-0.000-6M KUNDUZ RIVER AT PUL-I-KONDA SANG, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1968 June 10, 1968 236 1968 June 10, 1968 236

1969 June 17, 1969 150 1973 June 4, 1973 180

1970 May 22, 1970 133 1972 June 22, 1972 154

1971 May 20, 1971 126 1976 June 3, 1976 154

1972 June 22, 1972 154 1969 June 17, 1969 150

1973 June 4, 1973 180 1975 June 17, 1975 142

1974 June 4, 1974 114 1970 May 22, 1970 133

1975 June 17, 1975 142 1971 May 20, 1971 126

1976 June 3, 1976 154 1974 June 4, 1974 114

1977 June 23, 1977 113 1977 June 23, 1977 113

1978 June 7, 1978 106 1978 June 7, 1978 106
419

14-0.000-6M KUNDUZ RIVER AT PUL-I-KONDA SANG, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[Data may not be rounded in accordance with U.S. Geological Survey publication standards] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1968 25.8 24.0 22.0 19.9 16.8 17.0 29.3 63.1 166 98.9 42.9 33.3 46.6

1969 27.5 27.5 25.0 22.2 21.5 20.5 29.2 54.3 114 82.1 40.4 31.7 41.4

1970 29.6 28.6 25.9 23.2 23.0 21.6 23.4 63.1 60.9 34.8 26.6 24.5 32.2

1971 24.1 20.8 19.3 16.8 19.0 16.8 16.7 64.3 41.8 17.8 16.8 16.8 24.3

1972 17.5 16.9 16.3 15.1 15.9 17.5 17.2 35.0 95.9 62.7 26.5 19.2 29.6

1973 19.9 18.8 17.5 16.5 16.7 20.0 21.9 63.3 125 59.1 29.8 24.3 36.1

1974 23.2 20.5 18.2 18.8 16.9 22.8 21.5 41.1 74.8 39.0 20.3 17.8 27.9

1975 18.8 19.7 18.6 16.7 15.7 15.1 18.2 35.6 91.9 54.7 23.4 20.7 29.1

1976 19.2 20.5 18.5 16.4 14.0 16.0 18.5 53.3 87.9 61.3 25.8 23.9 31.3

1977 24.0 22.6 20.5 19.9 19.3 16.6 17.1 39.6 82.7 32.6 16.2 15.1 27.2

1978 14.2 14.5 11.5 13.8 14.2 14.8 20.9 52.1 77.9 37.8 23.3 16.6 26.0
420

14-0.000-8M KUNDUZ RIVER AT DASHT-I-SAFED

(U.S. Geological Survey identification number: 351800067550000)

LOCATION: Lat 35o18'N., long 67o55'E.

DRAINAGE AREA: 3,795 km2

.

ELEVATION: 1,588 meters above mean sea level.

PERIOD OF RECORD: October 12, 1967 to May 5, 1975 and August 13, 1977 to September 30, 

1978.

GAGE: Water-stage recorder. Site damaged by floods on May 5, 1975 and re-established 10 km 

downstream (Kunduz River at Doab) on August 13, 1977.

0

2

4

6

8

10

12

14

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
421

14-0.000-8M KUNDUZ RIVER AT DASHT-I-SAFED, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 13.0 1970 8.78 1971 10.6 1.67 0.16 8.33

November 12.8 1970 7.91 1971 9.96 1.38 0.14 7.85

December 13.5 1970 7.64 1971 10.5 1.81 0.17 8.31

January 13.7 1969 9.37 1972 11.0 1.48 0.13 8.65

February 12.9 1969 8.22 1978 10.2 1.46 0.14 8.02

March 12.5 1969 7.07 1978 9.51 1.54 0.16 7.49

April 12.4 1969 7.64 1978 9.62 1.43 0.15 7.58

May 14.2 1972 8.13 1974 10.4 1.93 0.19 8.21

June 21.7 1972 7.32 1971 13.4 5.52 0.41 10.5

July 13.8 1968 8.31 1970 11.2 1.90 0.17 8.80

August 12.7 1968 8.82 1970 10.5 1.22 0.12 8.28

September 12.8 1969 8.49 1972 10.1 1.66 0.16 7.96

Annual 12.6 1969 9.07 1978 10.5 1.21 0.12 100
422

14-0.000-8M KUNDUZ RIVER AT DASHT-I-SAFED, Continued 

Monthly and annual flow duration, in cubic meters per second 

[ng, not given] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 8.35 7.61 7.26 9.22 7.94 7.01 7.16 7.92 7.19 8.08 8.41 7.67 7.56

90 8.73 7.69 7.74 9.26 8.29 7.14 7.62 8.13 7.37 8.52 8.89 8.07 7.95

85 8.80 8.41 8.86 9.30 8.40 7.55 8.11 8.34 8.05 8.88 9.05 8.35 8.32

80 8.87 8.77 8.98 9.34 8.49 8.46 8.32 8.55 8.57 9.29 9.13 8.47 8.68

75 9.25 8.92 9.61 10.2 8.57 8.84 8.52 8.91 9.00 9.44 9.21 8.90 9.03

70 9.30 9.10 9.73 10.3 9.67 9.06 8.92 9.23 9.65 9.58 9.29 9.14 9.28

65 9.35 9.64 9.90 10.4 10.1 9.20 9.17 9.39 9.88 10.2 9.75 9.19 9.45

60 10.1 9.70 10.2 10.6 10.2 9.32 9.39 9.50 10.1 10.9 10.1 9.24 9.61

55 10.1 9.75 10.3 10.6 10.2 9.48 9.54 9.61 10.5 11.0 10.4 9.29 9.78

50 10.2 9.99 10.7 10.7 10.4 9.59 9.64 9.72 10.9 11.3 10.7 9.70 10.1

45 10.6 10.1 10.9 10.7 10.5 9.74 9.74 9.84 11.2 11.6 10.9 9.82 10.4

40 11.0 10.2 11.0 10.7 10.6 9.92 9.89 9.97 12.2 11.7 11.0 10.2 10.7

35 11.2 10.4 11.1 11.0 10.7 9.97 10.1 10.1 12.6 12.0 11.1 11.0 10.9

30 11.9 10.6 11.4 11.5 10.8 10.0 10.4 10.5 14.8 12.1 11.2 11.5 11.1

25 12.3 10.7 11.6 12.0 11.1 10.1 10.5 10.8 15.5 12.9 11.6 11.6 11.6

20 12.5 11.0 12.1 12.3 11.2 10.2 10.7 11.1 17.1 13.4 11.9 11.9 12.1

15 12.6 11.1 12.5 13.0 11.5 10.6 10.8 11.7 19.4 13.7 12.1 12.1 12.4

10 12.9 12.1 13.0 13.4 12.6 12.2 11.3 12.6 21.6 ng 12.4 12.6 12.9

5 13.1 13.0 13.5 ng 12.8 ng 11.9 13.4 26.7 ng ng ng 13.5
423

14-0.000-8M KUNDUZ RIVER AT DASHT-I-SAFED, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge1 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 10.6 10.6 10.5 10.3 9.90

0.95 1.05 12.0 10.8 10.7 10.5 10.1

0.90 1.11 13.0 10.9 10.9 10.7 10.4

0.80 1.25 14.6 11.4 11.4 11.2 10.9

0.50 2 19.6 13.8 13.6 13.4 12.8

0.20 5 29.0 20.8 19.5 18.8 17.1

0.10 10 37.1 28.7 25.6 24.3 21.0

0.04 25 49.8 44.2 36.8 34.2 27.5

0.02 50 61.5 61.4 48.5 44.3 33.7

0.01 100 75.2 85.5 63.8 57.3 41.2

0.005 200 91.5 119 84.1 74.1 50.3

0.002 500 118 ng ng ng ng

1

Less than 10 years of data used.

14-0.000-8M KUNDUZ RIVER AT DASHT-I-SAFED, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 6.43 6.44 6.42 6.55 6.76 7.23 7.58 7.94 8.02

0.10 10 6.68 6.71 6.71 6.84 7.07 7.52 7.94 8.33 8.45

0.20 5 7.02 7.06 7.10 7.23 7.48 7.91 8.41 8.83 9.02

0.50 2 7.81 7.87 7.97 8.11 8.40 8.80 9.44 9.90 10.2
424

14-0.000-8M KUNDUZ RIVER AT DASHT-I-SAFED, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 6.69 6.73 7.04 7.47 5.81 6.14 6.36 6.69

0.10 10 7.15 7.20 7.47 7.90 6.19 6.50 6.71 7.06

0.20 5 7.73 7.80 8.03 8.46 6.70 6.98 7.18 7.56

0.50 2 8.91 9.01 9.20 9.62 7.84 8.07 8.26 8.69

June-July-August September-October-November

0.05 20 6.57 6.89 6.97 7.12 6.68 6.81 7.04 7.76

0.10 10 6.98 7.29 7.41 7.65 7.03 7.14 7.34 8.01

0.20 5 7.54 7.84 8.00 8.32 7.51 7.60 7.77 8.38

0.50 2 8.86 9.10 9.31 9.75 8.65 8.70 8.84 9.33

14-0.000-8M KUNDUZ RIVER AT DASHT-I-SAFED, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1968 June 11, 1968 28.0 1972 June 2, 1972 47.0

1969 June 7, 1969 18.0 1968 June 11, 1968 28.0

1970 April 27, 1970 16.5 1978 April 26, 1978 27.5

1971 April 4, 1971 18.2 1971 April 4, 1971 18.2

1972 June 2, 1972 47.0 1969 June 7, 1969 18.0

1973 January 5, 1973 12.9 1970 April 27, 1970 16.5

1974 July 23, 1974 14.9 1974 July 23, 1974 14.9

1978 April 26, 1978 27.5 1973 January 5, 1973 12.9
425

14-0.000-8M KUNDUZ RIVER AT DASHT-I-SAFED, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[--, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1968 -- 8.95 9.86 10.4 10.5 10.00 10.4 10.6 20.9 13.8 12.7 11.8 --

1969 12.2 10.1 12.2 13.7 12.9 12.5 12.4 11.8 15.9 13.4 11.3 12.8 12.6

1970 13.0 12.8 13.5 12.6 11.1 10.1 10.2 10.7 9.72 8.31 8.82 8.66 10.8

1971 8.78 7.91 7.64 9.85 10.5 10.0 10.1 8.54 7.32 9.95 9.57 9.06 9.10

1972 9.04 9.58 10.2 9.37 8.52 8.97 8.29 14.2 21.7 11.3 10.7 8.49 10.9

1973 10.2 10.8 11.4 11.9 8.99 7.79 9.52 9.58 11.00 11.5 11.2 12.0 10.5

1974 12.1 10.5 11.4 10.8 10.9 9.50 8.34 8.13 8.74 11.7 10.0 9.99 10.2

1975 10.4 9.86 10.2 10.7 10.0 9.67 9.72 -- -- -- -- -- --

1977 -- -- -- -- -- -- -- -- -- -- -- 8.62 --

1978 8.85 9.13 8.47 9.46 8.22 7.07 7.64 9.84 11.5 9.35 9.80 9.47 9.07
426

14-1.1L0-1A BANGI RIVER AT PUL-I-BANGI

(U.S. Geological Survey identification number: 364200069150000)

LOCATION: Lat 36o42'N., long 69o15'E.

DRAINAGE AREA: 4,200 km2.

ELEVATION: 610 meters above mean sea level.

PERIOD OF RECORD: August 19, 1964 to September 30, 1978.

GAGE: Water-stage recorder.

0

5

10

15

20

25

30

35

40

45

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
427

14-1.1L0-1A BANGI RIVER AT PUL-I-BANGI, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 20.9 1970 9.01 1972 13.2 3.12 0.24 4.51

November 17.3 1970 9.20 1975 12.9 2.42 0.19 4.41

December 17.6 1969 9.52 1972 12.8 2.26 0.18 4.36

January 17.1 1969 8.98 1972 12.2 2.08 0.17 4.15

February 17.0 1969 7.76 1975 11.7 2.51 0.21 3.99

March 21.5 1969 7.55 1975 12.7 3.70 0.29 4.33

April 43.4 1969 8.93 1977 21.2 8.61 0.41 7.24

May 57.0 1969 27.6 1972 39.9 10.1 0.25 13.6

June 113 1966 34.9 1971 72.1 25.1 0.35 24.6

July 107 1969 12.7 1971 50.0 25.5 0.51 17.1

August 51.3 1969 9.02 1971 21.5 11.0 0.51 7.32

September 23.6 1969 7.51 1971 13.0 3.79 0.29 4.43

Annual 40.9 1969 15.7 1971 24.5 6.35 0.26 100
428

14-1.1L0-1A BANGI RIVER AT PUL-I-BANGI, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 9.05 9.11 9.59 9.20 8.05 7.61 8.53 13.0 30.2 13.1 9.76 7.94 8.75

90 9.41 9.63 10.4 9.50 8.55 8.04 10.0 16.5 35.0 18.3 10.9 8.42 9.61

85 10.0 10.7 10.7 9.98 8.80 8.89 11.1 19.8 38.2 23.1 12.3 8.84 10.4

80 10.4 11.1 10.9 10.3 9.06 9.50 12.7 24.4 41.2 26.0 13.1 9.65 11.1

75 10.7 11.5 11.3 10.5 9.40 9.92 13.4 27.2 45.5 28.8 13.7 11.0 11.7

70 11.5 11.7 11.6 10.9 10.3 10.2 13.9 29.1 49.6 31.3 14.6 11.7 12.2

65 12.1 11.9 11.8 11.4 10.8 10.5 14.4 30.7 51.6 33.6 15.5 12.0 12.6

60 12.5 12.1 11.9 11.7 11.2 10.9 15.3 32.6 54.1 36.7 16.3 12.2 13.1

55 12.7 12.3 12.1 11.9 11.5 11.5 16.4 34.9 58.8 39.2 17.0 12.6 13.5

50 12.9 12.6 12.3 12.1 11.7 11.9 17.5 37.1 63.5 42.7 17.8 12.9 14.2

45 13.2 12.7 12.5 12.4 11.8 12.5 18.5 39.5 67.1 47.9 18.7 13.2 15.0

40 13.8 12.8 12.8 12.7 12.3 12.8 20.5 41.6 71.1 52.0 19.6 13.4 16.4

35 14.1 13.6 13.0 12.9 12.7 13.3 22.0 44.2 76.0 56.0 20.7 13.7 18.2

30 14.5 14.0 13.3 13.0 13.0 13.8 23.3 47.8 81.4 59.5 22.0 14.0 20.9

25 15.1 14.2 13.8 13.2 13.3 14.2 24.5 51.2 86.7 63.2 24.5 14.5 26.6

20 15.4 15.1 14.1 13.8 13.7 15.1 27.8 54.6 93.7 70.6 27.9 15.0 33.2

15 15.6 15.9 15.4 14.0 14.2 16.8 30.1 59.5 108 75.5 31.7 15.5 42.5

10 16.3 17.1 16.9 14.5 15.0 19.5 34.8 64.0 123 93.8 37.1 16.1 55.7

5 20.1 17.4 17.6 16.7 17.1 21.2 45.9 74.2 154 117 49.6 22.4 73.7
429

14-1.1L0-1A BANGI RIVER AT PUL-I-BANGI, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 40.6 51.9 48.1 42.1 37.6

0.95 1.05 67.9 62.8 57.8 51.0 45.4

0.90 1.11 88.1 70.2 64.5 56.9 50.4

0.80 1.25 120 81.3 74.3 65.2 57.3

0.50 2 207 111 100 86.1 74.0

0.20 5 343 160 142 116 96.8

0.10 10 439 197 173 138 112

0.04 25 564 250 217 165 131

0.02 50 658 294 253 187 146

0.01 100 754 343 293 210 161

0.005 200 850 396 335 233 176

0.002 500 978 ng ng ng ng

14-1.1L0-1A BANGI RIVER AT PUL-I-BANGI, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 5.68 5.88 5.94 6.17 6.94 7.58 8.18 8.71 9.09

0.10 10 6.37 6.57 6.65 6.84 7.54 8.17 8.74 9.21 9.71

0.20 5 7.26 7.44 7.56 7.73 8.35 8.95 9.48 9.88 10.5

0.50 2 9.05 9.19 9.46 9.67 10.1 10.6 11.1 11.4 12.2
430

14-1.1L0-1A BANGI RIVER AT PUL-I-BANGI, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 7.56 7.60 7.73 8.14 6.17 6.71 7.04 7.72

0.10 10 8.00 8.12 8.28 8.66 6.86 7.37 7.72 8.46

0.20 5 8.62 8.82 9.02 9.36 7.79 8.29 8.65 9.49

0.50 2 10.1 10.4 10.7 11.0 9.93 10.5 10.9 12.0

June-July-August September-October-November

0.05 20 7.34 7.91 8.31 9.92 6.61 6.87 7.1 7.84

0.10 10 8.56 9.09 9.44 11.2 7.47 7.74 7.97 8.66

0.20 5 10.2 10.7 11.1 13.1 8.59 8.86 9.08 9.71

0.50 2 14.0 14.8 15.5 18.4 10.9 11.2 11.4 11.9
431

14-1.1L0-1A BANGI RIVER AT PUL-I-BANGI, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1965 June 15, 1965 91.0 1969 May 22, 1969 398

1966 June 15, 1966 390 1966 June 15, 1966 390

1967 May 23, 1967 377 1972 May 12, 1972 382

1968 June 10, 1968 215 1967 May 23, 1967 377

1969 May 22, 1969 398 1976 April 27, 1976 370

1970 June 2, 1970 94.0 1977 May 29, 1977 300

1971 May 27, 1971 152 1978 April 27, 1978 230

1972 May 12, 1972 382 1968 June 10, 1968 215

1973 June 25, 1973 82.0 1971 May 27, 1971 152

1974 June 19, 1974 88.0 1975 May 16, 1975 148

1975 May 16, 1975 148 1970 June 2, 1970 94.0

1976 April 27, 1976 370 1965 June 15, 1965 91.0

1977 May 29, 1977 300 1974 June 19, 1974 88.0

1978 April 27, 1978 230 1973 June 25, 1973 82.0
432

14-1.1L0-1A BANGI RIVER AT PUL-I-BANGI, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[Data may not be rounded in accordance with U.S. Geological Survey publication standards; --, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1964 -- -- -- -- -- -- -- -- -- -- -- 11.4 --

1965 13.0 12.0 11.9 10.5 9.31 10.5 17.1 30.8 72.8 48.1 21.0 15.7 22.8

1966 13.2 13.8 13.3 12.0 13.3 17.0 27.7 46.9 113 31.1 18.5 13.7 27.8

1967 15.7 15.2 13.3 13.0 11.4 10.0 12.9 31.4 63.4 59.8 21.3 13.5 23.5

1968 14.5 14.1 13.5 13.0 11.3 11.6 17.3 40.3 113 86.6 36.1 16.0 32.3

1969 15.3 17.0 17.6 17.1 17.0 21.5 43.4 57.0 101 107 51.3 23.6 40.9

1970 20.9 17.3 16.1 14.1 14.4 14.7 20.6 41.4 51.8 31.1 16.0 12.5 22.6

1971 12.7 12.4 11.3 11.3 12.4 12.7 14.4 37.5 34.9 12.7 9.02 7.51 15.7

1972 9.01 9.71 9.52 8.98 8.65 11.5 14.6 27.6 55.2 38.8 25.6 12.5 19.3

1973 10.2 10.9 11.7 12.6 13.4 14.1 20.0 37.2 66.7 61.0 23.9 12.7 24.6

1974 12.3 11.6 12.0 11.8 11.4 15.8 23.3 28.1 44.1 30.2 12.9 8.82 18.5

1975 10.3 9.20 10.8 10.2 7.76 7.55 21.9 46.3 69.7 69.9 22.3 13.6 25.1

1976 13.0 12.1 11.1 12.1 11.6 10.3 26.5 50.5 49.8 54.5 14.3 12.9 23.3

1977 15.5 13.6 11.4 9.82 8.90 8.33 8.93 28.0 79.4 26.0 12.7 8.63 19.3

1978 9.56 12.2 15.4 14.0 13.0 12.3 28.4 55.0 94.5 43.0 15.6 11.8 27.1
433

14-1.R00-2A TALOQAN RIVER AT PUL-I-CHUGHA

(U.S. Geological Survey identification number: 364400069120000)

LOCATION: Lat 36o44'N., long 69o12'E.

DRAINAGE AREA: 9,760 km2

.

ELEVATION: 558 meters above mean sea level.

PERIOD OF RECORD: April 19, 1960 to September 30, 1960 and August 2, 1964 to September 

30, 1978.

GAGE: Water-stage recorder.

0

20

40

60

80

100

120

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
434

14-1.R00-2A TALOQAN RIVER AT PUL-I-CHUGHA, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 47.0 1970 29.3 1966 36.2 5.05 0.14 4.71

November 42.9 1970 31.0 1973 36.3 3.26 0.09 4.72

December 42.1 1969 29.4 1972 34.6 3.88 0.11 4.51

January 35.8 1977 23.0 1966 29.5 3.54 0.12 3.84

February 35.2 1976 22.4 1965 27.8 3.81 0.14 3.62

March 50.2 1969 20.3 1967 31.5 7.44 0.24 4.11

April 144 1969 24.9 1977 52.5 28.9 0.55 6.84

May 178 1969 51.9 1974 88.7 30.6 0.35 11.6

June 285 1969 90.0 1960 179 57.0 0.32 23.4

July 267 1969 53.0 1971 146 56.2 0.38 19.0

August 133 1969 46.3 1974 69.4 22.1 0.32 9.04

September 55.2 1969 26.1 1977 35.8 7.34 0.20 4.66

Annual 109 1969 48.9 1971 65.1 15.1 0.23 100
435

14-1.R00-2A TALOQAN RIVER AT PUL-I-CHUGHA, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 28.3 30.7 29.4 22.0 21.7 20.3 23.4 37.1 78.2 55.1 39.9 25.5 24.0

90 30.2 31.0 29.8 24.5 22.6 21.6 26.2 44.4 85.7 73.2 41.7 27.7 26.4

85 31.1 31.4 30.3 25.0 23.8 22.7 29.9 48.1 97.8 83.4 45.1 28.9 28.5

80 31.4 32.3 30.9 25.6 24.1 24.1 31.3 51.0 112 93.0 48.0 29.9 29.6

75 31.7 32.5 31.1 26.3 24.4 25.2 32.9 53.3 123 99.4 50.3 30.7 30.7

70 32.7 33.2 31.4 26.8 24.9 26.4 34.7 56.0 133 105 52.6 31.3 31.8

65 33.0 34.5 32.4 27.6 25.8 27.4 36.2 59.7 140 110 56.4 31.9 33.1

60 33.7 35.6 32.7 28.7 26.4 28.6 37.5 66.4 151 117 59.3 32.5 34.4

55 34.6 36.3 32.9 29.4 26.9 29.5 39.4 71.1 158 123 61.3 32.9 36.1

50 36.1 36.7 33.9 30.1 27.8 30.3 42.3 75.2 167 131 63.2 33.4 37.9

45 37.1 37.3 34.3 30.5 28.2 31.0 44.4 81.8 176 140 65.1 34.2 40.1

40 37.9 38.1 35.5 30.7 28.6 31.7 46.5 89.2 187 146 67.7 36.0 42.7

35 38.4 38.4 36.4 30.8 29.3 32.5 48.7 96.0 201 155 71.3 36.9 48.2

30 39.3 38.6 36.9 31.0 29.8 34.4 51.3 102 212 165 75.1 37.5 56.6

25 40.1 38.9 38.0 31.6 31.2 36.0 54.7 113 227 178 78.8 38.1 70.6

20 40.6 39.8 39.2 32.8 31.5 37.4 61.3 125 244 192 84.5 40.6 91.3

15 42.0 40.2 40.2 34.1 32.6 39.1 71.1 138 269 211 91.1 45.0 118

10 45.1 40.5 40.9 34.8 33.9 41.1 84.6 155 288 250 102 49.4 154

5 46.1 42.7 41.8 36.9 34.8 44.7 126 181 324 304 131 53.6 203
436

14-1.R00-2A TALOQAN RIVER AT PUL-I-CHUGHA, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 150 156 140 117 112

0.95 1.05 176 178 163 141 133

0.90 1.11 193 193 177 156 145

0.80 1.25 220 213 197 176 162

0.50 2 292 262 245 223 201

0.20 5 409 333 310 281 250

0.10 10 498 382 353 318 281

0.04 25 625 446 407 362 319

0.02 50 731 495 447 394 346

0.01 100 847 546 488 425 372

0.005 200 975 598 529 456 399

0.002 500 1,160 ng ng ng ng

14-1.R00-2A TALOQAN RIVER AT PUL-I-CHUGHA, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 16.7 16.8 17.8 19.1 20.3 22.5 23.9 25.7 28.7

0.10 10 17.8 18.0 18.8 20.0 21.5 23.7 25.2 26.8 29.4

0.20 5 19.1 19.4 20.0 21.2 22.9 25.2 26.7 28.2 30.3

0.50 2 21.7 22.1 22.5 23.9 25.6 27.8 29.3 30.7 32.3
437

14-1.R00-2A TALOQAN RIVER AT PUL-I-CHUGHA, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 19.3 19.8 20.1 21.3 16.6 17.8 19.4 21.2

0.10 10 20.2 20.8 21.3 22.4 18 19.4 20.8 22.8

0.20 5 21.3 22.1 22.7 23.8 19.9 21.4 22.7 25.0

0.50 2 23.9 24.7 25.4 26.6 23.8 25.9 27.1 30.0

June-July-August September-October-November

0.05 20 30.5 34.0 38.4 46.9 21.8 23.0 23.5 25.7

0.10 10 32.7 36.1 40.2 48.9 23.2 24.3 24.8 26.9

0.20 5 35.7 39.2 43.1 52.3 25.1 26.1 26.6 28.4

0.50 2 42.8 46.9 51.3 62.7 29.3 30.0 30.5 32.0
438

14-1.R00-2A TALOQAN RIVER AT PUL-I-CHUGHA, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1960 May 17, 1960 180 1969 April 20, 1969 640

1965 June 15, 1965 240 1977 May 29, 1977 540

1966 June 20, 1966 447 1966 June 20, 1966 447

1967 June 12, 1967 244 1976 April 27, 1976 382

1968 July 10, 1968 377 1968 July 10, 1968 377

1969 April 20, 1969 640 1975 June 18, 1975 330

1970 June 30, 1970 300 1978 June 7, 1978 305

1971 June 1, 1971 216 1970 June 30, 1970 300

1972 June 13, 1972 199 1974 June 19, 1974 249

1973 June 13, 1973 220 1967 June 12, 1967 244

1974 June 19, 1974 249 1965 June 15, 1965 240

1975 June 18, 1975 330 1973 June 13, 1973 220

1976 April 27, 1976 382 1971 June 1, 1971 216

1977 May 29, 1977 540 1972 June 13, 1972 199

1978 June 7, 1978 305 1960 May 17, 1960 180
439

14-1.R00-2A TALOQAN RIVER AT PUL-I-CHUGHA, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[--, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1960 -- -- -- -- -- -- -- 60.2 90.0 117 59.5 31.9 --

1964 -- -- -- -- -- -- -- -- -- -- 64.0 32.7 --

1965 31.4 32.0 30.8 25.3 22.4 26.4 41.3 68.8 193 144 62.9 38.3 59.8

1966 29.3 34.1 32.1 23.0 24.4 32.9 45.0 97.5 237 109 67.0 38.2 64.2

1967 39.1 39.0 32.4 25.6 24.8 20.3 33.2 64.1 166 154 62.6 29.9 57.7

1968 31.2 37.8 32.0 30.2 25.3 30.4 47.6 83.6 257 239 106 40.3 80.1

1969 43.0 38.5 42.1 33.9 29.2 50.2 144 178 285 267 133 55.2 109

1970 47.0 42.9 38.2 31.3 30.2 29.6 41.9 93.1 161 99.8 66.3 47.9 60.9

1971 41.0 38.6 37.2 30.8 29.6 31.6 36.8 84.8 119 53.0 51.6 32.5 48.9

1972 36.7 33.1 29.4 26.7 23.8 26.7 40.3 69.2 148 98.6 65.0 32.4 52.5

1973 31.0 31.0 31.0 31.0 32.6 40.7 50.4 88.8 162 144 70.4 32.1 62.3

1974 35.6 33.5 36.7 29.6 24.8 37.5 47.5 51.9 111 113 46.3 28.4 49.8

1975 37.1 35.4 33.9 32.6 28.2 27.4 45.9 88 172 164 84.9 33.9 65.5

1976 36.9 38.1 32.5 27.7 35.2 33.7 74.7 101 137 210 65.6 37.7 69.3

1977 33.0 37.5 40.6 35.8 32.0 25.1 24.9 77.8 213 146 48.0 26.1 61.7

1978 34.5 36.2 36.0 29.0 26.9 29.0 62.1 123 240 133 57.7 35.3 70.3
440

14-1.R00-5A FARKHAR RIVER NEAR TALOQAN

(U.S. Geological Survey identification number: 363800069430000)

LOCATION: Lat 36o38'N., long 69o43'E.

DRAINAGE AREA: 4,110 km2

.

ELEVATION: 991 meters above mean sea level.

PERIOD OF RECORD: November 22, 1966 to September 30, 1978.

GAGE: Water-stage recorder.

0

10

20

30

40

50

60

70

80

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
441

14-1.R00-5A FARKHAR RIVER NEAR TALOQAN, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 24.5 1970 15.9 1972 20.1 2.74 0.14 3.95

November 18.2 1970 12.6 1975 15.7 1.74 0.11 3.08

December 18.4 1969 11.6 1972 13.4 1.88 0.14 2.63

January 14.7 1969 10.2 1971 11.7 1.56 0.13 2.30

February 14.1 1973 8.83 1971 11.1 1.67 0.15 2.18

March 20.4 1969 9.49 1967 12.8 3.32 0.26 2.51

April 82.0 1969 14.0 1977 29.0 17.9 0.62 5.70

May 123 1969 35.4 1974 59.8 22.1 0.37 11.8

June 184 1969 85.0 1974 124 30.5 0.25 24.4

July 182 1969 56.1 1971 113 38.8 0.34 22.3

August 110 1969 47.2 1974 65.1 17.9 0.28 12.8

September 48.7 1970 24.0 1973 32.5 7.36 0.23 6.39

Annual 69.5 1969 33.4 1974 43.1 10.0 0.23 100
442

14-1.R00-5A FARKHAR RIVER NEAR TALOQAN, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 14.9 11.9 11.4 9.70 8.99 9.01 11.0 19.5 64.4 55.0 37.7 21.3 9.83

90 15.6 12.7 11.6 10.0 9.11 9.34 12.0 23.7 71.5 64.6 41.9 23.0 10.8

85 17.0 13.2 11.8 10.1 9.53 9.59 12.7 28.5 77.2 69.0 44.7 23.9 11.6

80 17.4 13.8 12.0 10.5 9.66 9.82 13.6 31.1 84.7 73.3 47.2 25.0 12.4

75 17.8 14.2 12.0 10.6 9.93 9.99 14.4 33.7 90.1 79.7 48.6 26.2 13.1

70 18.1 14.6 12.1 10.7 9.99 10.2 15.4 36.2 95.4 84.2 50.5 26.9 13.9

65 18.3 15.1 12.4 11.0 10.0 10.4 17.6 38.9 101 88.0 53.1 27.8 15.2

60 18.6 15.4 12.5 11.1 10.1 10.7 19.6 42.3 106 91.3 55.7 28.9 16.7

55 19.0 15.7 12.7 11.2 10.4 11.1 20.6 46.7 111 94.1 58.3 30.0 18.4

50 19.6 16.1 12.9 11.3 10.6 11.8 22.1 50.9 117 99.6 60.9 30.7 20.6

45 20.1 16.2 13.0 11.5 10.7 12.0 23.8 55.3 122 104 64.8 31.7 24.5

40 20.5 16.6 13.1 11.6 11.0 12.2 25.3 60.7 127 109 68.3 32.9 29.4

35 21.0 16.7 13.4 11.9 11.9 12.4 27.1 66.4 134 116 70.8 34.1 36.4

30 22.0 16.8 13.7 12.6 12.1 13.0 29.5 71.3 140 126 73.6 35.2 45.7

25 23.0 17.1 14.2 13.0 12.3 13.7 34.0 75.9 149 141 75.5 36.2 59.2

20 23.7 17.4 15.0 13.1 12.9 14.8 37.7 81.8 159 156 77.5 38.0 72.1

15 24.4 17.8 15.5 13.7 13.3 16.3 41.3 92.3 174 170 82.1 39.9 86.8

10 25.2 18.0 16.1 14.3 13.7 18.2 47.2 109 190 194 94.5 45.2 109

5 26.9 19.0 18.1 14.9 14.1 20.3 71.9 137 221 212 114 53.7 146
443

14-1.R00-5A FARKHAR RIVER NEAR TALOQAN, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 104 102 92.0 84.1 80.2

0.95 1.05 128 118 109 98.7 93.3

0.90 1.11 143 129 119 108 102

0.80 1.25 166 144 134 121 113

0.50 2 223 181 170 153 140

0.20 5 305 233 220 197 177

0.10 10 363 268 253 227 201

0.04 25 440 314 297 265 231

0.02 50 499 349 330 295 254

0.01 100 561 384 363 325 277

0.005 200 625 421 398 355 300

0.002 500 715 ng ng ng ng

14-1.R00-5A FARKHAR RIVER NEAR TALOQAN, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 8.17 8.24 8.48 8.62 8.83 9.02 9.51 10.2 12.1

0.10 10 8.45 8.54 8.76 8.91 9.12 9.37 9.83 10.5 12.5

0.20 5 8.85 8.95 9.15 9.31 9.53 9.84 10.3 10.9 13.1

0.50 2 9.81 9.92 10.1 10.3 10.5 10.9 11.4 11.9 14.2
444

14-1.R00-5A FARKHAR RIVER NEAR TALOQAN, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 8.23 8.53 8.72 8.97 7.88 8.25 8.4 8.96

0.10 10 8.52 8.77 8.95 9.21 8.31 8.69 8.86 9.46

0.20 5 8.92 9.12 9.29 9.57 8.87 9.29 9.49 10.2

0.50 2 9.88 10.0 10.2 10.5 10.1 10.6 11.0 12.0

June-July-August September-October-November

0.05 20 28.7 31.6 37.4 46.1 10.5 11.4 11.8 12.3

0.10 10 30.7 33.8 39.1 47.9 11.3 12.1 12.5 13.1

0.20 5 33.6 37.0 41.8 50.9 12.4 12.9 13.3 14.1

0.50 2 41.0 44.8 49.6 59.8 14.2 14.5 14.9 15.8

14-1.R00-5A FARKHAR RIVER NEAR TALOQAN, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1967 June 11, 1967 150 1969 April 19, 1969 400

1968 July 9, 1968 276 1976 May 24, 1976 343

1969 April 19, 1969 400 1978 April 22, 1978 330

1970 June 2, 1970 167 1977 June 23, 1977 320

1971 May 28, 1971 191 1968 July 9, 1968 276

1972 April 15, 1972 189 1974 June 18, 1974 202

1973 June 12, 1973 135 1971 May 28, 1971 191

1974 June 18, 1974 202 1972 April 15, 1972 189

1975 June 16, 1975 181 1975 June 16, 1975 181

1976 May 24, 1976 343 1970 June 2, 1970 167

1977 June 23, 1977 320 1967 June 11, 1967 150

1978 April 22, 1978 330 1973 June 12, 1973 135
445

14-1.R00-5A FARKHAR RIVER NEAR TALOQAN, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[--, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1967 -- -- 11.8 10.3 9.63 9.49 15.4 44.5 110 102 56.6 32.9 --

1968 21.8 16.6 12.9 11.1 9.99 12.2 24.9 43.7 154 162 86.5 32.8 49.2

1969 21.7 17.2 18.4 14.7 11.5 20.4 82.0 123 184 182 110 43.7 69.5

1970 24.5 18.2 13.3 10.4 10.4 10.8 21.6 59.4 112 83.1 73.2 48.7 40.6

1971 22.3 15.8 12.8 10.2 8.83 10.1 21.5 70.6 109 56.1 49.7 26.6 34.6

1972 15.9 13.6 11.6 10.7 10.2 13.0 24.3 52.5 107 78.6 56.4 28.0 35.2

1973 18.2 16.8 15.5 14.4 14.1 16.2 28.1 64.0 105 92.8 61.7 24.0 39.4

1974 17.6 13.9 12.2 12.0 13.1 16.4 24.5 35.4 85.0 95.3 47.2 26.3 33.4

1975 16.7 12.6 12.8 10.8 9.98 10.2 22.0 54.4 113 104 68.6 34.2 39.3

1976 22.5 17.0 14.0 13.0 12.1 12.0 34.0 54.1 96.6 164 63.7 35.6 45.0

1977 20.5 14.9 13.0 12.0 10.1 9.82 14.0 54.8 152 136 54.5 27.9 43.5

1978 19.3 16.0 12.5 11.0 13.2 12.5 36.0 61.6 161 106 52.9 29.7 44.4
446

14-5.R00-1A ANDARAB RIVER AT DOSHI

(U.S. Geological Survey identification number: 353600068410000)

LOCATION: Lat 35o36'N., long 68o41'E.

DRAINAGE AREA: 3,705 km2

.

ELEVATION: 860 meters above mean sea level.

PERIOD OF RECORD: October 1, 1964 to September 30, 1978.

GAGE: Water-stage recorder.

0

10

20

30

40

50

60

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
447

14-5.R00-1A ANDARAB RIVER AT DOSHI, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 22.5 1969 11.7 1972 16.5 3.31 0.20 4.05

November 18.6 1978 10.3 1975 14.0 2.51 0.18 3.44

December 15.0 1973 9.40 1972 12.2 1.98 0.16 3.00

January 14.0 1973 8.49 1975 11.2 1.75 0.16 2.75

February 13.6 1973 8.13 1975 10.9 1.70 0.16 2.66

March 19.3 1966 8.12 1975 12.2 3.23 0.26 3.00

April 61.2 1973 10.1 1972 24.1 12.9 0.54 5.91

May 111 1973 37.9 1972 67.2 21.0 0.31 16.5

June 224 1968 57.7 1971 117 48.1 0.41 28.7

July 169 1968 28.3 1971 73.6 39.1 0.53 18.1

August 58.0 1968 17.8 1971 31.1 12.6 0.41 7.62

September 27.5 1969 10.9 1974 17.4 4.58 0.26 4.28

Annual 56.6 1968 22.6 1974 34.0 9.62 0.28 100
448

14-5.R00-1A ANDARAB RIVER AT DOSHI, Continued 

Monthly and annual flow duration, in cubic meters per second 

[ng, not given] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 11.4 10.2 9.10 8.48 8.10 8.03 9.44 16.2 44.5 25.6 15.7 11.3 9.03

90 12.3 11.0 9.53 8.73 8.59 8.26 10.1 26.6 51.5 31.1 17.6 12.3 10.0

85 13.1 11.4 10.0 9.01 9.05 8.64 10.8 30.5 58.8 35.3 18.9 13.0 10.6

80 14.0 11.6 10.2 9.41 9.35 8.99 11.7 34.4 70.1 41.4 19.7 13.3 11.2

75 14.4 11.8 10.6 10.0 9.66 9.45 12.8 37.8 75.2 44.3 20.5 14.0 12.0

70 14.9 12.3 10.9 10.1 9.77 9.82 13.9 44.2 80.8 46.9 21.3 14.3 12.7

65 15.1 13.1 11.1 10.3 10.0 10.2 14.7 49.4 85.0 50.1 22.3 15.1 13.3

60 15.4 13.3 11.6 10.7 10.2 10.5 15.5 53.9 88.9 52.7 23.4 15.5 13.9

55 15.8 13.5 11.8 11.0 10.3 10.9 16.3 59.1 97.1 55.1 25.2 16.2 14.8

50 16.0 13.9 12.0 11.1 10.6 11.3 17.8 63.9 103 57.8 26.5 16.9 16.0

45 16.4 14.1 12.5 11.3 11.0 12.1 19.6 69.4 118 60.9 28.4 17.9 17.6

40 16.8 14.3 12.7 11.7 11.2 12.7 23.1 72.3 129 66.0 30.6 18.2 19.6

35 17.0 14.6 13.1 12.0 11.3 13.2 24.5 75.2 143 72.8 32.3 18.5 22.6

30 17.5 15.0 13.6 12.5 11.7 13.7 26.0 80.8 151 83.5 34.1 18.9 28.3

25 18.1 15.6 14.1 12.7 12.1 14.4 29.6 87.6 157 91.2 36.5 19.4 36.8

20 19.1 16.2 14.3 13.0 12.6 15.0 32.8 97.2 164 112 40.0 20.3 48.8

15 20.5 17.1 14.6 13.2 13.1 15.9 39.9 108 174 124 43.0 22.3 66.1

10 22.0 18.2 15.0 13.8 14.0 17.5 47.1 118 187 138 48.3 24.8 84.3

5 23.7 19.6 15.8 14.2 14.2 19.9 59.1 140 206 159 66.1 27.4 129
449

14-5.R00-1A ANDARAB RIVER AT DOSHI, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 128 79.1 66.5 58.0 52.6

0.95 1.05 134 96.0 82.9 74.0 67.0

0.90 1.11 139 107 93.6 84.4 76.2

0.80 1.25 147 122 109 98.8 89.1

0.50 2 173 159 146 134 120

0.20 5 222 210 199 181 163

0.10 10 262 245 236 212 191

0.04 25 323 289 283 251 227

0.02 50 375 323 320 280 253

0.01 100 435 357 357 309 280

0.005 200 502 1

393 395 338 307

0.002 500 606 ng ng ng ng

1

Data does not fit log-Pearson Type III curve, use with caution.

14-5.R00-1A ANDARAB RIVER AT DOSHI, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 7.09 7.29 7.49 7.69 8.01 8.18 8.42 8.72 9.64

0.10 10 7.46 7.62 7.79 8.00 8.35 8.59 8.86 9.23 10.3

0.20 5 7.93 8.04 8.17 8.40 8.77 9.13 9.44 9.89 11.1

0.50 2 8.86 8.91 9.02 9.26 9.64 10.3 10.7 11.2 12.7
450

14-5.R00-1A ANDARAB RIVER AT DOSHI, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 7.87 7.83 8.00 8.27 6.75 7.16 7.53 7.96

0.10 10 8.13 8.16 8.34 8.65 7.30 7.68 8.03 8.56

0.20 5 8.50 8.61 8.80 9.15 8.05 8.41 8.74 9.41

0.50 2 9.39 9.64 9.85 10.2 9.83 10.2 10.5 11.5

June-July-August September-October-November

0.05 20 11.0 12.5 14.3 16.8 9.16 9.50 9.82 10.2

0.10 10 12.5 14.0 15.7 18.5 9.79 10.1 10.4 10.9

0.20 5 14.6 16.0 17.6 20.9 10.6 10.9 11.2 11.8

0.50 2 19.4 20.7 22.6 27.6 12.2 12.5 12.9 13.7

14-5.R00-1A ANDARAB RIVER AT DOSHI, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1965 June 17, 1965 190 1968 June 17, 1968 381

1966 June 18, 1966 220 1966 June 18, 1966 220

1967 May 24, 1967 190 1969 June 19, 1969 220

1968 June 17, 1968 381 1965 June 17, 1965 190

1969 June 19, 1969 220 1967 May 24, 1967 190

1970 April 12, 1970 160 1973 June 8, 1973 190

1971 May 20, 1971 150 1972 June 21, 1972 180

1972 June 21, 1972 180 1976 June 4, 1976 180

1973 June 8, 1973 190 1975 May 15, 1975 170

1974 May 9, 1974 161 1974 May 9, 1974 161

1975 May 15, 1975 170 1970 April 12, 1970 160

1976 June 4, 1976 180 1977 May 28, 1977 160

1977 May 28, 1977 160 1971 May 20, 1971 150

1978 May 22, 1978 115 1978 May 22, 1978 115
451

14-5.R00-1A ANDARAB RIVER AT DOSHI, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[Data may not be rounded in accordance with U.S. Geological Survey publication standards] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1965 15.0 11.8 12.6 12.4 12.9 13.2 19.1 53.0 144 126 31.0 14.0 38.9

1966 16.9 16.0 14.7 12.9 12.1 19.3 34.6 61.5 162 54.4 33.1 18.7 38.0

1967 17.3 14.9 11.5 11.5 11.4 11.9 17.0 59.1 144 94.5 26.6 15.2 36.3

1968 17.1 14.3 13.1 11.2 9.64 9.67 27.6 99.5 224 169 58.0 24.7 56.6

1969 22.5 17.9 10.5 13.0 13.4 15.8 33.7 78.6 157 112 57.3 27.5 46.8

1970 21.9 16.5 14.4 13.4 11.2 11.6 22.6 58.1 60.3 48.7 34.4 14.0 27.4

1971 14.7 12.0 11.5 10.5 10.9 14.8 25.7 76.5 57.7 28.3 17.8 13.1 24.5

1972 11.7 11.3 9.40 9.14 9.23 9.89 10.1 37.9 138 73.0 23.8 14.3 29.8

1973 15.0 13.7 15.0 14.0 13.6 15.9 61.2 111 130 58.2 31.8 20.8 41.8

1974 14.4 13.8 12.9 10.7 10.5 10.7 15.0 43.5 62.8 47.5 18.0 10.9 22.6

1975 11.9 10.3 9.60 8.49 8.13 8.12 18.3 73.8 101 68.0 31.2 18.3 30.7

1976 16.0 13.3 10.8 9.14 9.74 9.67 21.9 71.8 81.2 66.9 30.9 18.5 30.1

1977 15.8 12.0 10.2 10.6 10.2 8.60 12.5 42.4 97.7 43.2 20.5 18.5 25.2

1978 20.9 18.6 14.7 9.65 8.89 12.1 17.9 74.5 80.3 40.2 20.5 15.7 27.9
452

14-9.5R0-1T FOLADI RIVER AT BAMYAN

(U.S. Geological Survey identification number: 344900067490000)

LOCATION: Lat 34o49'N., long 67o49'E.

DRAINAGE AREA: 320 km2

.

ELEVATION: 2,507 meters above mean sea level.

PERIOD OF RECORD: December 4, 1969 to May 21, 1977.

GAGE: Staff gage.

0

0.5

1

1.5

2

2.5

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
453

14-9.5R0-1T FOLADI RIVER AT BAMYAN, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 1.22 1973 0.56 1972 0.94 0.24 0.26 6.45

November 1.20 1973 0.29 1976 0.69 0.33 0.47 4.78

December 1.25 1977 0.39 1972 0.84 0.37 0.44 5.78

January 1.20 1970 0.55 1974 0.82 0.24 0.29 5.65

February 1.04 1970 0.40 1975 0.72 0.21 0.29 4.94

March 0.91 1973 0.28 1971 0.57 0.22 0.38 3.95

April 1.62 1973 0.07 1971 0.47 0.52 1.10 3.25

May 4.26 1973 0.99 1970 1.87 1.21 0.65 12.9

June 10.6 1972 0.60 1971 4.17 3.30 0.79 28.8

July 2.64 1975 0.09 1971 1.64 0.95 0.58 11.3

August 2.15 1973 0.08 1971 0.84 0.67 0.80 5.75

September 1.58 1973 0.65 1974 0.94 0.35 0.37 6.50

Annual 2.04 1973 0.58 1971 1.22 0.56 0.46 100
454

14-9.5R0-1T FOLADI RIVER AT BAMYAN, Continued 

Monthly and annual flow duration, in cubic meters per second 

[ng, not given] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 0.49 0.20 0.16 0.51 0.39 0.24 0.03 0.04 0.44 0.09 0.08 0.52 0.09

90 0.50 0.28 0.23 0.52 0.42 0.26 0.06 0.06 0.61 0.10 0.09 0.57 0.22

85 0.60 0.32 0.27 0.53 0.47 0.31 0.08 0.16 0.89 0.22 0.41 0.62 0.32

80 0.71 0.37 0.44 0.57 0.49 0.34 0.09 0.26 1.27 0.46 0.46 0.66 0.45

75 0.72 0.40 0.48 0.59 0.54 0.40 0.11 0.49 1.68 0.82 0.50 0.70 0.50

70 0.73 0.47 0.68 0.64 0.57 0.43 0.15 0.56 2.01 0.90 0.52 0.73 0.55

65 0.75 0.50 0.73 0.67 0.60 0.48 0.20 0.92 2.28 0.95 0.54 0.75 0.60

60 0.76 0.58 0.77 0.70 0.64 0.51 0.22 1.33 2.52 1.00 0.59 0.78 0.64

55 0.90 0.68 0.83 0.75 0.67 0.54 0.24 1.57 2.74 1.17 0.61 0.80 0.70

50 0.97 0.72 0.92 0.79 0.73 0.57 0.27 1.72 2.94 1.36 0.63 0.83 0.76

45 0.99 0.73 0.96 0.81 0.74 0.60 0.31 1.83 3.57 1.46 0.65 0.87 0.82

40 1.03 0.75 0.99 0.86 0.76 0.62 0.40 1.94 4.13 1.78 0.73 0.91 0.89

35 1.19 0.77 1.04 0.91 0.79 0.65 0.45 2.10 4.57 1.98 0.82 0.96 0.97

30 1.20 0.81 1.13 0.98 0.84 0.69 0.55 2.32 5.37 2.37 0.93 1.01 1.09

25 1.22 0.90 1.18 1.01 0.88 0.75 0.71 2.66 6.13 2.45 1.17 1.18 1.23

20 1.23 1.14 1.21 1.02 0.92 0.81 0.81 3.22 6.77 2.54 1.25 1.38 1.43

15 1.25 1.21 1.23 1.04 0.96 0.84 0.93 3.68 7.71 2.64 1.32 1.46 1.99

10 1.28 1.24 1.26 1.22 0.99 0.88 1.32 4.34 9.73 2.99 2.11 1.56 2.52

5 1.33 1.28 1.51 1.33 1.18 0.96 1.7 5.39 11.1 4.14 ng 1.71 4.14
455

14-9.5R0-1T FOLADI RIVER AT BAMYAN, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge1 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 2.30 2.14 2.02 1.48 1.13

0.95 1.05 3.30 2.74 2.54 2.02 1.58

0.90 1.11 3.90 3.17 2.91 2.40 1.90

0.80 1.25 4.90 3.82 3.50 3.00 2.42

0.50 2 7.10 5.69 5.21 4.74 3.98

0.20 5 10.1 8.92 8.31 7.78 6.90

0.10 10 11.9 11.5 10.9 10.3 9.40

0.04 25 14.1 15.4 15.0 13.9 13.3

0.02 50 15.7 18.8 18.5 17.1 16.8

0.01 100 17.1 2

22.6 22.7 220.7 20.8

0.005 200 18.5 2

26.9 27.5 224.7 25.5

0.002 500 20.3 ng ng ng ng

1

Less than 10 years of data used.

2

Data does not fit log-Pearson Type III curve, use with caution.

14-9.5R0-1T FOLADI RIVER AT BAMYAN, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 0 0 0 0.01 0.03 0.09 0.18 0.31 0.32

0.10 10 0 0 0 0.02 0.05 0.15 0.24 0.37 0.39

0.20 5 0 0 0 0.03 0.08 0.24 0.34 0.45 0.50

0.50 2 0.04 0.05 0.07 0.12 0.19 0.49 0.57 0.63 0.72
456

14-9.5R0-1T FOLADI RIVER AT BAMYAN, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 0.08 0.11 0.14 0.33 0 0 0.01 0.03

0.10 10 0.11 0.15 0.18 0.36 0 0 0.02 0.05

0.20 5 0.16 0.21 0.24 0.40 0 0 0.03 0.08

0.50 2 0.33 0.39 0.42 0.52 0.04 0.07 0.13 0.20

June-July-August September-October-November

0.05 20 0.08 0.08 0.08 0.08 0.06 0.12 0.18 0.25

0.10 10 0.11 0.13 0.13 0.14 0.10 0.17 0.23 0.32

0.20 5 0.18 0.22 0.24 0.27 0.17 0.25 0.31 0.41

0.50 2 0.43 0.54 0.59 0.69 0.38 0.45 0.49 0.61

14-9.5R0-1T FOLADI RIVER AT BAMYAN, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1970 June 28, 1970 9.29 1972 June 22, 1972 13.1

1971 May 19, 1971 3.42 1970 June 28, 1970 9.29

1972 June 22, 1972 13.1 1973 May 7, 1973 8.00

1973 May 7, 1973 8.00 1975 June 20, 1975 7.50

1974 June 6, 1974 5.00 1976 May 24, 1976 6.39

1975 June 20, 1975 7.50 1974 June 6, 1974 5.00

1976 May 24, 1976 6.39 1971 May 19, 1971 3.42
457

14-9.5R0-1T FOLADI RIVER AT BAMYAN, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[--, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1970 -- -- -- 1.20 1.04 0.33 0.21 0.99 2.26 2.05 1.20 1.00 --

1971 1.00 0.69 0.63 0.80 0.53 0.28 0.07 1.52 0.60 0.09 0.08 0.69 0.58

1972 0.56 0.32 0.39 0.71 0.77 0.76 0.80 2.69 10.6 1.83 0.66 0.79 1.73

1973 1.22 1.20 1.21 0.99 0.93 0.91 1.62 4.26 5.74 2.59 2.15 1.58 2.04

1974 1.16 0.66 0.87 0.55 0.69 0.58 0.23 1.03 2.81 0.69 0.48 0.65 0.87

1975 0.74 0.73 1.11 0.60 0.40 0.49 0.10 1.01 4.71 2.64 0.76 0.68 1.17

1976 0.78 0.29 0.42 0.66 0.61 0.51 0.30 1.58 2.50 1.60 0.53 1.22 0.92

1977 1.10 0.96 1.25 1.06 0.78 0.74 0.44 -- -- -- -- -- --
458

14-9.R00-1A BAMYAN RIVER AT DOAB

(U.S. Geological Survey identification number: 351600067590000)

LOCATION: Lat 35o16'N., long 67o59'E.

DRAINAGE AREA: 5,005 km2

.

ELEVATION: 1,468 meters above mean sea level.

PERIOD OF RECORD: October 1, 1967 to September 30, 1978.

GAGE: Water-stage recorder.

0

2

4

6

8

10

12

14

16

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
459

14-9.R00-1A BAMYAN RIVER AT DOAB, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 8.55 1970 3.10 1972 5.99 1.69 0.28 5.53

November 8.82 1970 3.26 1972 5.70 1.64 0.29 5.27

December 7.92 1970 2.98 1972 4.85 1.33 0.27 4.48

January 6.69 1970 2.70 1978 4.43 1.16 0.26 4.10

February 5.85 1969 2.46 1978 4.15 1.15 0.28 3.83

March 5.32 1968 2.82 1975 4.18 0.85 0.20 3.86

April 8.25 1968 3.06 1972 4.90 1.67 0.34 4.52

May 26.6 1973 10.4 1975 14.9 4.83 0.32 13.8

June 56.1 1969 9.35 1971 30.7 14.6 0.47 28.4

July 31.5 1969 2.66 1971 15.5 8.79 0.57 14.3

August 13.3 1969 2.65 1971 6.85 3.18 0.46 6.33

September 10.5 1969 1.97 1971 6.06 2.61 0.43 5.60

Annual 14.4 1969 4.90 1971 9.03 2.92 0.32 100
460

14-9.R00-1A BAMYAN RIVER AT DOAB, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 3.15 3.23 3.07 2.75 2.45 2.74 2.68 3.88 10.2 2.80 2.75 1.62 2.77

90 3.98 3.61 3.22 3.06 2.55 2.96 2.85 4.56 13.6 3.81 3.78 3.52 3.17

85 4.51 3.89 3.45 3.23 2.69 3.01 2.98 5.66 16.0 5.27 4.08 4.01 3.52

80 4.64 4.37 3.64 3.51 2.98 3.20 3.06 6.22 17.9 6.42 4.22 4.20 3.91

75 4.86 4.52 3.83 3.58 3.16 3.38 3.24 6.87 20.1 7.05 4.36 4.38 4.15

70 4.98 4.78 4.06 3.65 3.34 3.48 3.58 7.73 21.8 8.53 4.77 4.57 4.38

65 5.10 4.90 4.30 3.81 3.66 3.77 3.82 8.79 23.2 9.61 4.96 4.91 4.60

60 5.23 5.02 4.44 3.97 3.89 3.97 4.01 10.0 24.3 10.9 5.13 5.05 4.81

55 5.43 5.11 4.50 4.11 4.26 4.03 4.15 11.6 25.8 11.8 5.46 5.19 5.02

50 5.59 5.21 4.57 4.24 4.32 4.22 4.35 13.5 27.6 13.0 5.88 5.41 5.33

45 5.79 5.44 4.90 4.41 4.39 4.34 4.56 15.1 29.2 15.1 6.40 5.70 5.66

40 6.26 5.97 5.02 4.58 4.48 4.53 4.80 16.4 31.8 16.4 7.15 6.05 6.17

35 6.51 6.30 5.11 4.80 4.61 4.64 5.02 17.5 34.7 18.2 7.58 6.62 6.81

30 6.99 6.67 5.19 5.01 4.88 4.76 5.44 18.7 37.3 19.3 8.02 7.05 7.59

25 7.41 6.88 5.53 5.27 5.03 4.95 6.07 20.2 40.9 20.9 8.54 7.39 8.49

20 8.02 7.19 5.74 5.49 5.29 5.04 6.57 22.2 46.2 24.2 9.23 7.85 10.4

15 8.26 7.64 6.09 5.86 5.43 5.11 7.44 25.0 51.7 27.1 9.69 8.83 15.1

10 8.46 8.13 6.52 6.26 5.67 5.31 8.09 28.5 54.6 31.3 11.1 9.94 21.2

5 8.76 9.09 7.92 6.70 5.91 6.00 8.71 34.2 58.1 36.5 14.2 11.7 30.7
461

14-9.R00-1A BAMYAN RIVER AT DOAB, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 25.3 15.3 13.7 12.3 11.2

0.95 1.05 28.6 20.3 18.2 16.4 14.9

0.90 1.11 30.9 23.5 21.2 19.2 17.4

0.80 1.25 34.5 27.9 25.4 23.1 20.9

0.50 2 44.8 38.1 35.4 32.8 29.8

0.20 5 62.3 51.0 48.9 46.5 42.5

0.10 10 76.3 59.0 57.6 55.7 51.1

0.04 25 96.9 68.6 68.3 67.5 62.2

0.02 50 115 1

75.4 176.1 76.3 70.6

0.01 100 134 1

81.9 183.8 85.2 79.2

0.005 200 157 1

88.2 191.5 94.3 87.9

0.002 500 191 ng ng ng ng

1

Data does not fit log-Pearson Type III curve, use with caution.

14-9.R00-1A BAMYAN RIVER AT DOAB, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 0.98 1.08 1.27 1.52 1.96 2.17 2.36 2.57 2.84

0.10 10 1.20 1.33 1.52 1.79 2.17 2.47 2.66 2.87 3.19

0.20 5 1.52 1.67 1.87 2.15 2.47 2.87 3.07 3.28 3.65

0.50 2 2.26 2.45 2.64 2.94 3.16 3.73 3.96 4.17 4.67
462

14-9.R00-1A BAMYAN RIVER AT DOAB, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 1.38 1.60 2.06 2.29 1.22 1.66 2.23 2.54

0.10 10 1.66 1.95 2.36 2.58 1.57 1.95 2.44 2.77

0.20 5 2.05 2.42 2.76 2.97 2.05 2.35 2.73 3.07

0.50 2 2.93 3.42 3.61 3.83 3.08 3.20 3.38 3.75

June-July-August September-October-November

0.05 20 1.77 2.09 2.33 2.84 1.58 1.71 1.77 2.29

0.10 10 2.36 2.67 2.90 3.36 2.13 2.34 2.41 2.89

0.20 5 3.22 3.50 3.71 4.12 2.90 3.22 3.30 3.71

0.50 2 5.28 5.47 5.64 6.11 4.56 5.03 5.17 5.40

14-9.R00-1A BAMYAN RIVER AT DOAB, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1968 June 15, 1968 61.5 1969 May 26, 1969 101

1969 May 26, 1969 101 1973 June 9, 1973 61.8

1970 June 3, 1970 30.3 1968 June 15, 1968 61.5

1971 May 20, 1971 32.0 1972 June 2, 1972 61.4

1972 June 2, 1972 61.4 1978 June 7, 1978 45.0

1973 June 9, 1973 61.8 1975 May 16, 1975 44.6

1974 June 6, 1974 33.8 1977 May 28, 1977 40.5

1975 May 16, 1975 44.6 1976 June 2, 1976 40.0

1976 June 2, 1976 40.0 1974 June 6, 1974 33.8

1977 May 28, 1977 40.5 1971 May 20, 1971 32.0

1978 June 7, 1978 45.0 1970 June 3, 1970 30.3
463

14-9.R00-1A BAMYAN RIVER AT DOAB, Continued 

Monthly and annual mean discharges, in cubic meters per second 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1968 7.22 6.19 4.57 4.34 4.97 5.32 8.25 14.4 51.0 27.5 11.3 10.3 12.9

1969 7.44 7.22 5.19 5.55 5.85 5.19 6.02 18.5 56.1 31.5 13.3 10.5 14.4

1970 8.55 8.82 7.92 6.69 5.41 4.80 5.81 11.4 16.4 8.37 5.51 5.08 7.90

1971 5.14 4.79 4.31 3.64 3.32 3.81 3.98 13.0 9.35 2.66 2.65 1.97 4.90

1972 3.10 3.26 2.98 3.55 4.05 3.32 3.06 11.1 36.8 19.8 8.02 6.89 8.81

1973 8.08 7.44 5.89 5.72 5.18 4.23 5.90 26.6 43.7 18.6 8.06 7.62 12.3

1974 6.29 5.90 4.21 3.60 2.56 4.32 3.17 13.7 21.5 7.82 4.03 4.00 6.77

1975 4.83 3.80 3.51 3.86 3.21 2.82 3.25 10.4 25.4 18.2 6.95 5.69 7.67

1976 5.19 5.12 5.02 4.59 4.41 4.47 6.23 18.9 25.1 16.1 4.85 5.55 8.81

1977 5.66 5.28 5.62 4.54 4.24 4.67 4.67 11.0 23.9 9.47 4.57 4.40 7.34

1978 4.34 4.93 4.15 2.70 2.46 3.01 3.52 15.2 28.3 10.5 6.11 4.62 7.50
464

14-9.R00-6T BAMYAN RIVER AT AHANGARAN

(U.S. Geological Survey identification number: 344900067550000)

LOCATION: Lat 34o49'N., long 67o55'E.

DRAINAGE AREA: 1,660 km2

.

ELEVATION: 2,450 meters above mean sea level.

PERIOD OF RECORD: April 14, 1975 to May 21, 1976.

GAGE: Staff gage.

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
465

14-9.R00-6T BAMYAN RIVER AT AHANGARAN, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second; ng, not given] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 2.97 1976 2.97 1976 2.97 ng ng 5.49

November 2.59 1976 2.59 1976 2.59 ng ng 4.79

December 2.53 1976 2.53 1976 2.53 ng ng 4.68

January 2.29 1976 2.29 1976 2.29 ng ng 4.23

February 2.32 1976 2.32 1976 2.32 ng ng 4.29

March 2.24 1976 2.24 1976 2.24 ng ng 4.14

April 3.24 1976 3.24 1976 3.23 ng ng 5.98

May 6.77 1975 6.77 1975 6.77 ng ng 12.5

June 12.8 1975 12.8 1975 12.8 ng ng 23.7

July 7.75 1975 7.75 1975 7.75 ng ng 14.3

August 4.47 1975 4.47 1975 4.47 ng ng 8.26

September 4.12 1975 4.12 1975 4.12 ng ng 7.62

Annual ng ng ng ng ng ng ng 100
466

14-9.R00-6T BAMYAN RIVER AT AHANGARAN, Continued 

Monthly and annual flow duration, in cubic meters per second 

[ng, not given] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 2.70 1.20 2.05 1.57 2.04 2.03 1.75 1.69 8.63 6.32 3.90 3.42 ng

90 2.70 2.40 2.37 2.02 2.21 2.03 1.91 1.73 9.68 6.35 4.12 3.43 ng

85 2.71 ng 2.38 2.04 2.21 2.04 1.95 1.78 10.1 6.37 4.14 3.45 ng

80 2.71 ng 2.38 2.21 2.21 2.04 1.99 2.09 10.5 6.40 4.32 3.67 ng

75 2.71 ng 2.39 2.22 2.21 2.04 2.05 2.41 11.4 6.43 4.33 3.89 ng

70 2.87 ng 2.39 2.23 2.22 2.05 2.10 2.48 11.9 6.75 4.33 3.91 ng

65 2.88 ng 2.40 2.23 2.22 2.05 2.19 2.55 12.0 6.81 4.34 3.92 ng

60 2.88 ng 2.53 2.24 2.22 2.20 2.38 3.51 12.1 7.25 4.34 4.12 ng

55 ng ng 2.53 2.25 ng 2.20 2.41 4.08 13.0 7.29 4.35 4.14 ng

50 ng ng 2.54 2.37 ng 2.21 2.45 4.62 13.1 7.32 4.35 4.15 ng

45 ng ng 2.55 2.38 ng 2.21 2.86 4.90 13.1 7.36 4.57 4.35 ng

40 ng ng 2.55 2.39 ng 2.21 3.10 7.84 13.2 7.57 4.58 4.36 ng

35 ng ng 2.69 2.40 ng 2.22 3.38 10.0 13.6 7.85 4.59 4.37 ng

30 ng ng 2.70 2.41 ng 2.22 3.88 10.3 13.7 8.20 4.60 4.38 ng

25 ng ng 2.70 ng ng ng 4.16 10.6 14.5 8.50 4.61 ng ng

20 ng ng 2.71 ng ng ng 4.34 11.3 15.2 9.30 4.81 ng ng

15 ng ng 2.72 ng ng ng 4.98 13.5 15.7 10.1 4.83 ng ng

10 ng ng 2.73 ng ng ng 5.12 14.2 16.0 10.2 4.85 ng ng

5 ng ng ng ng ng ng ng ng ng ng ng ng ng
467

14-9.R00-6T BAMYAN RIVER AT AHANGARAN, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 ng ng ng ng ng

0.95 1.05 ng ng ng ng ng

0.90 1.11 ng ng ng ng ng

0.80 1.25 ng ng ng ng ng

0.50 2 ng ng ng ng ng

0.20 5 ng ng ng ng ng

0.10 10 ng ng ng ng ng

0.04 25 ng ng ng ng ng

0.02 50 ng ng ng ng ng

0.01 100 ng ng ng ng ng

0.005 200 ng ng ng ng ng

0.002 500 ng ng ng ng ng

14-9.R00-6T BAMYAN RIVER AT AHANGARAN, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second; ng, not given] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 ng ng ng ng ng ng ng ng ng

0.10 10 ng ng ng ng ng ng ng ng ng

0.20 5 ng ng ng ng ng ng ng ng ng

0.50 2 ng ng ng ng ng ng ng ng ng
468

14-9.R00-6T BAMYAN RIVER AT AHANGARAN, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second; ng, not given] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 ng ng ng ng ng ng ng ng

0.10 10 ng ng ng ng ng ng ng ng

0.20 5 ng ng ng ng ng ng ng ng

0.50 2 ng ng ng ng ng ng ng ng

June-July-August September-October-November

0.05 20 ng ng ng ng ng ng ng ng

0.10 10 ng ng ng ng ng ng ng ng

0.20 5 ng ng ng ng ng ng ng ng

0.50 2 ng ng ng ng ng ng ng ng

14-9.R00-6T BAMYAN RIVER AT AHANGARAN, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1975 June 20, 1975 23.1 1975 June 20, 1975 23.1
469

14-9.R00-6T BAMYAN RIVER AT AHANGARAN, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[Data may not be rounded in accordance with U.S. Geological Survey publication standards; --, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1975 -- -- -- -- -- -- -- 6.77 12.8 7.75 4.47 4.12 --

1976 2.97 2.59 2.53 2.29 2.32 2.24 3.24 -- -- -- -- -- --
470

14-9.R00-8A BAMYAN RIVER AT BAMYAN

(U.S. Geological Survey identification number: 345000067490000)

LOCATION: Lat 34o50'N., long 67o49'E.

DRAINAGE AREA: 945 km2

.

ELEVATION: 2,506 meters above mean sea level.

PERIOD OF RECORD: October 1, 1969 to May 21, 1977.

GAGE: Staff gage.

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

1.8

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
471

14-9.R00-8A BAMYAN RIVER AT BAMYAN, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 1.97 1970 0.78 1977 1.07 0.39 0.36 9.39

November 1.96 1970 0.59 1971 1.05 0.44 0.42 9.29

December 1.54 1970 0.36 1971 0.76 0.45 0.58 6.74

January 1.43 1973 0.23 1975 0.67 0.41 0.61 5.92

February 0.93 1976 0.26 1975 0.63 0.25 0.41 5.51

March 1.46 1971 0.46 1972 0.98 0.40 0.41 8.65

April 2.33 1973 0.41 1972 1.07 0.70 0.66 9.46

May 3.01 1973 0.63 1972 1.38 0.81 0.58 12.2

June 4.15 1973 0.52 1974 1.33 1.27 0.96 11.7

July 2.09 1973 0.38 1975 0.86 0.59 0.69 7.59

August 1.10 1973 0.19 1971 0.71 0.29 0.41 6.25

September 1.19 1973 0.68 1971 0.83 0.17 0.21 7.33

Annual 1.69 1973 0.62 1971 0.96 0.39 0.40 100
472

14-9.R00-8A BAMYAN RIVER AT BAMYAN, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 0.68 0.44 0.32 0.21 0.21 0.38 0.19 0.35 0.42 0.19 0.24 0.55 0.29

90 0.73 0.53 0.36 0.28 0.30 0.42 0.30 0.48 0.45 0.25 0.30 0.63 0.36

85 0.75 0.61 0.37 0.29 0.31 0.43 0.33 0.54 0.47 0.30 0.42 0.64 0.41

80 0.79 0.64 0.37 0.30 0.37 0.46 0.39 0.59 0.48 0.38 0.49 0.68 0.46

75 0.81 0.70 0.39 0.34 0.41 0.49 0.44 0.63 0.57 0.46 0.56 0.68 0.52

70 0.87 0.75 0.41 0.37 0.42 0.53 0.58 0.69 0.61 0.53 0.63 0.69 0.58

65 0.89 0.84 0.42 0.42 0.43 0.58 0.63 0.76 0.65 0.61 0.64 0.75 0.64

60 0.91 0.89 0.48 0.49 0.56 0.69 0.66 0.85 0.70 0.67 0.67 0.77 0.71

55 0.93 0.97 0.54 0.55 0.61 0.82 0.69 0.95 0.76 0.71 0.73 0.80 0.76

50 0.95 1.00 0.61 0.57 0.62 0.88 0.72 1.03 0.80 0.73 0.77 0.81 0.82

45 1.04 1.03 0.67 0.60 0.67 0.94 0.77 1.12 0.87 0.76 0.79 0.86 0.86

40 1.09 1.10 0.74 0.63 0.69 0.97 0.88 1.27 0.94 0.79 0.81 0.88 0.90

35 1.12 1.14 0.82 0.73 0.76 1.02 1.01 1.53 1.01 0.82 0.82 0.90 0.98

30 1.13 1.29 0.96 0.83 0.79 1.09 1.12 1.67 1.12 0.96 0.84 0.91 1.05

25 1.15 1.35 1.12 0.98 0.81 1.17 1.41 2.02 1.27 1.09 0.89 0.92 1.10

20 1.16 1.40 1.32 1.03 0.85 1.51 1.76 2.31 1.82 1.16 0.92 0.94 1.21

15 1.32 1.45 1.39 1.10 0.90 1.60 2.15 2.67 2.42 1.37 1.02 1.04 1.41

10 1.88 1.87 1.44 1.25 0.96 1.99 2.49 2.90 3.72 1.79 1.10 1.18 1.79

5 2.01 1.99 1.65 1.54 1.14 2.31 2.83 3.19 4.52 2.15 1.14 1.21 2.33
473

14-9.R00-8A BAMYAN RIVER AT BAMYAN, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge1 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 1.20 1.17 21.03 21.01 1.07

0.95 1.05 1.60 1.56 1.33 1.22 1.16

0.90 1.11 1.90 1.82 1.53 1.36 1.24

0.80 1.25 2.30 2.18 1.82 1.57 1.36

0.50 2 3.40 3.08 2.58 2.16 1.76

0.20 5 5.10 4.32 3.71 3.16 2.56

0.10 10 6.30 5.13 4.52 3.95 3.26

0.04 25 7.90 6.17 5.60 5.10 4.41

0.02 50 9.10 6.93 6.45 6.08 5.48

0.01 100 10.4 7.69 7.33 7.18 6.77

0.005 200 11.8 8.46 2

8.26 8.40 8.33

0.002 500 13.7 ng ng ng ng

1

Less than 10 years of data used.

2

Data does not fit log-Pearson Type III curve, use with caution.

14-9.R00-8A BAMYAN RIVER AT BAMYAN, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 0 0 0 0 0.10 0.21 0.26 0.30 0.49

0.10 10 0 0 0 0 0.14 0.24 0.29 0.33 0.52

0.20 5 0.12 0.12 0.12 0.16 0.19 0.28 0.33 0.38 0.56

0.50 2 0.18 0.19 0.21 0.24 0.30 0.37 0.44 0.49 0.65
474

14-9.R00-8A BAMYAN RIVER AT BAMYAN, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 0.14 0.14 0.16 0.18 0.14 0.14 0.17 0.34

0.10 10 0.19 0.19 0.21 0.23 0.17 0.18 0.22 0.38

0.20 5 0.25 0.27 0.28 0.31 0.22 0.25 0.28 0.43

0.50 2 0.41 0.45 0.47 0.51 0.34 0.41 0.45 0.56

June-July-August September-October-November

0.05 20 0 0 0 0.11 0.32 0.39 0.44 0.59

0.10 10 0 0 0 0.17 0.35 0.41 0.47 0.62

0.20 5 0.14 0.19 0.23 0.27 0.38 0.45 0.5 0.65

0.50 2 0.36 0.42 0.47 0.57 0.45 0.53 0.59 0.71

14-9.R00-8A BAMYAN RIVER AT BAMYAN, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1970 April 5, 1970 2.90 1976 April 22, 1976 6.14

1971 March 20, 1971 2.04 1973 June 14, 1973 5.30

1972 June 24, 1972 2.04 1975 May 16, 1975 5.18

1973 June 14, 1973 5.30 1970 April 5, 1970 2.90

1974 March 20, 1974 2.90 1974 March 20, 1974 2.90

1975 May 16, 1975 5.18 1971 March 20, 1971 2.04

1976 April 22, 1976 6.14 1972 June 24, 1972 2.04
475

14-9.R00-8A BAMYAN RIVER AT BAMYAN, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[--, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1970 1.97 1.96 1.54 1.06 0.85 1.06 1.07 1.34 0.74 0.76 0.80 0.89 1.17

1971 0.83 0.59 0.36 0.38 0.49 1.46 0.59 0.67 0.68 0.47 0.19 0.68 0.62

1972 0.81 0.83 0.56 0.54 0.62 0.46 0.41 0.63 1.07 1.13 0.89 0.86 0.73

1973 1.09 1.27 1.06 1.43 0.88 0.72 2.33 3.01 4.15 2.09 1.10 1.19 1.69

1974 1.11 0.75 0.37 0.29 0.33 1.39 0.57 1.04 0.52 0.66 0.63 0.71 0.70

1975 1.00 0.92 0.37 0.23 0.26 0.48 1.13 1.34 1.14 0.38 0.54 0.75 0.71

1976 0.94 1.32 1.20 0.79 0.93 0.93 1.92 1.67 0.97 0.55 0.81 0.76 1.06

1977 0.78 0.81 0.66 0.65 0.66 1.36 0.58 -- -- -- -- -- --
476

15-0.000-1M KOKCHA RIVER AT KHOJAGHAR

(U.S. Geological Survey identification number: 370500069280000)

LOCATION: Lat 37o05'N., long 69o28'E.

DRAINAGE AREA: 20,645 km2

.

ELEVATION: 446 meters above mean sea level.

PERIOD OF RECORD: April 26, 1964 to September 30, 1978.

GAGE: Staff gage. Water-stage recorder at same site and datum during water years 1970-73 and 

1978.

0

50

100

150

200

250

300

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
477

15-0.000-1M KOKCHA RIVER AT KHOJAGHAR, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 142 1968 82.2 1972 110 19.9 0.18 4.67

November 111 1970 64.8 1978 85.9 16.3 0.19 3.65

December 99.8 1970 53.1 1973 72.3 13.8 0.19 3.08

January 92.7 1970 42.5 1973 62.6 15.2 0.24 2.66

February 84.3 1970 46.5 1971 63.3 14.1 0.22 2.69

March 153 1969 42.7 1977 80.4 24.2 0.30 3.42

April 201 1978 60.7 1977 133 47.4 0.36 5.67

May 368 1969 128 1974 225 70.7 0.31 9.57

June 748 1978 291 1974 484 137 0.28 20.6

July 703 1969 313 1970 511 133 0.26 21.7

August 472 1967 205 1972 338 76.5 0.23 14.4

September 240 1967 130 1972 186 30.9 0.17 7.90

Annual 262 1969 144 1972 198 37.4 0.19 100
478

15-0.000-1M KOKCHA RIVER AT KHOJAGHAR, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 73.6 59.6 50.0 40.5 42.8 41.9 58.9 97.4 205 267 208 120 49.0

90 77.3 63.7 53.8 43.0 44.4 54.0 67.8 112 240 296 229 131 56.8

85 81.9 66.8 56.1 44.2 46.2 56.6 72.8 125 268 327 242 135 64.0

80 86.5 69.2 58.8 46.4 48.2 59.3 78.1 138 295 355 254 139 68.4

75 91.3 71.8 61.4 50.5 49.5 62.0 83.4 146 326 380 267 150 72.5

70 94.4 73.5 63.3 51.9 50.6 64.7 89.9 156 360 400 279 157 77.4

65 98.3 75.7 65.2 54.9 52.7 66.7 94.7 167 384 422 287 164 83.8

60 103 79.2 67.1 57.5 55.7 68.5 100 176 408 443 296 170 91.5

55 109 82.9 69.6 60.8 58.4 70.1 106 185 434 462 307 178 101

50 113 85.2 71.6 63.1 61.9 71.6 112 198 458 485 321 185 115

45 115 88.0 73.7 64.7 64.3 73.0 119 215 479 511 335 190 132

40 118 90.8 76.0 66.1 66.2 74.8 127 230 512 547 350 198 153

35 121 93.2 78.0 67.3 67.9 77.0 134 248 549 569 364 203 186

30 124 95.4 80.3 68.6 72.6 79.6 144 267 584 587 385 209 225

25 128 98.0 82.1 70.3 75.4 83.1 160 283 635 608 403 219 267

20 132 103 84.5 73.8 77.6 90.3 179 307 677 652 422 227 318

15 136 107 88.5 78.6 80.3 99.8 196 336 721 717 453 238 388

10 141 110 91.0 86.3 86.0 124 221 362 764 780 484 252 468

5 149 115 101 92.8 90.3 158 288 400 833 844 525 270 594
479

15-0.000-1M KOKCHA RIVER AT KHOJAGHAR, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 398 361 343 325 287

0.95 1.05 483 457 426 400 358

0.90 1.11 537 514 476 445 400

0.80 1.25 613 588 541 504 457

0.50 2 797 742 682 633 582

0.20 5 1,050 909 844 785 728

0.10 10 1,220 1,000 936 873 813

0.04 25 1,430 1,100 1,040 975 911

0.02 50 1,590 1,160 1,110 1,040 977

0.01 100 1,760 1,220 1,170 1,110 1,040

0.005 200 1,920 1,270 1,230 1,170 1,100

0.002 500 2,150 ng ng ng ng

15-0.000-1M KOKCHA RIVER AT KHOJAGHAR, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 32.4 33.7 34.9 36.3 38.0 41.0 44.0 47.9 58.5

0.10 10 35.2 36.5 38.0 39.6 41.4 44.3 47.3 51.1 62.1

0.20 5 39.1 40.3 42.1 44.0 45.9 48.8 51.7 55.3 66.8

0.50 2 48.0 49.1 51.3 53.7 55.9 58.8 61.6 65.0 77.4
480

15-0.000-1M KOKCHA RIVER AT KHOJAGHAR, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 33.4 36.4 37.8 39.6 38.0 42.2 44.4 51.2

0.10 10 36.4 39.5 41.1 42.9 42.2 46.5 48.0 55.1

0.20 5 40.5 43.6 45.5 47.4 47.6 52.1 53.0 60.7

0.50 2 49.8 52.9 55.4 57.6 58.3 63.8 65.1 74.7

June-July-August September-October-November

0.05 20 144 172 192 215 51.8 53.0 55.3 61.4

0.10 10 163 189 210 239 56.7 58.0 60.2 66.0

0.20 5 186 210 232 269 62.8 64.4 66.4 71.9

0.50 2 228 251 280 331 75.4 77.4 79.3 84.7
481

15-0.000-1M KOKCHA RIVER AT KHOJAGHAR, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1964 June 30, 1964 775 1969 May 22, 1969 1,550

1965 June 21, 1965 555 1977 June 23, 1977 1,110

1966 June 19, 1966 805 1978 June 30, 1978 1,065

1967 June 29, 1967 751 1973 June 12, 1973 1,008

1968 July 8, 1968 969 1968 July 8, 1968 969

1969 May 22, 1969 1,550 1975 June 18, 1975 889

1970 June 30, 1970 484 1976 May 25, 1976 889

1971 June 10, 1971 600 1966 June 19, 1966 805

1972 June 24, 1972 680 1964 June 30, 1964 775

1973 June 12, 1973 1,008 1967 June 29, 1967 751

1974 July 1, 1974 520 1972 June 24, 1972 680

1975 June 18, 1975 889 1971 June 10, 1971 600

1976 May 25, 1976 889 1965 June 21, 1965 555

1977 June 23, 1977 1,110 1974 July 1, 1974 520

1978 June 30, 1978 1,065 1970 June 30, 1970 484
482

15-0.000-1M KOKCHA RIVER AT KHOJAGHAR, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[Data may not be rounded in accordance with U.S. Geological Survey publication standards; --, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1964 -- -- -- -- -- -- -- 191 445 466 312 188 --

1965 108 74.2 68.2 67.7 83.3 80.6 113 161 380 412 243 147 162

1966 105 95.3 80.5 70.2 78.4 84.9 108 201 503 476 360 189 197

1967 125 90.3 78.8 68.3 66.8 68.7 102 177 460 581 472 240 212

1968 142 108 86.0 67.1 66.5 84.0 135 219 648 672 429 191 238

1969 126 100 89.9 87.0 79.9 153 194 368 615 703 433 178 262

1970 123 111 99.8 92.7 84.3 76.9 115 216 364 313 294 209 175

1971 94.7 67.0 55.4 43.6 46.5 63.4 99.9 210 429 339 332 159 162

1972 82.2 72.2 63.1 53.1 49.0 80.3 110 176 373 337 205 130 144

1973 84.9 72.6 53.1 42.5 50.2 85.5 191 316 690 592 338 224 229

1974 113 84.1 72.1 64.1 57.8 74.2 73.8 128 291 382 250 153 146

1975 92.4 66.1 61.8 52.3 51.9 62.3 185 298 531 499 364 195 206

1976 126 98.7 75.6 67.7 70.3 85.5 179 236 328 604 330 218 202

1977 133 98.0 70.6 53.8 46.5 42.7 60.7 152 452 631 295 162 184

1978 83.5 64.8 57.7 45.8 55.0 83.1 201 326 748 654 418 202 246
483

15-0.000-3M KOKCHA RIVER NEAR KESHEM

(U.S. Geological Survey identification number: 365700070030000)

LOCATION: Lat 36o57'N., long 70o03'E.

DRAINAGE AREA: 16,765 km2

.

ELEVATION: 805 meters above mean sea level.

PERIOD OF RECORD: October 1, 1969 to September 30, 1978.

GAGE: Water-stage recorder.

0

5

10

15

20

25

30

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
484

15-0.000-3M KOKCHA RIVER NEAR KESHEM, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 116 1970 69.5 1978 92.9 15.6 0.17 4.86

November 105 1970 47.7 1978 71.1 16.7 0.23 3.72

December 80.7 1970 41.0 1978 56.1 11.3 0.20 2.93

January 73.0 1970 35.9 1978 48.4 11.4 0.24 2.53

February 67.4 1970 39.0 1977 48.1 9.37 0.19 2.51

March 67.5 1973 39.6 1977 57.0 8.59 0.15 2.98

April 153 1975 49.3 1977 102 38.0 0.37 5.34

May 271 1978 105 1977 196 61.8 0.31 10.3

June 666 1978 262 1974 402 146 0.36 21.0

July 579 1978 285 1970 414 111 0.27 21.6

August 374 1978 171 1972 274 56.2 0.21 14.3

September 180 1978 104 1972 151 25.9 0.17 7.89

Annual 210 1978 122 1972 160 29.3 0.18 100
485

15-0.000-3M KOKCHA RIVER NEAR KESHEM, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 60.2 47.0 40.1 34.9 36.6 37.2 45.4 67.4 164 210 163 98.3 40.0

90 72.0 50.1 42.7 35.8 38.5 41.4 52.0 83.7 189 254 183 105 44.7

85 75.2 54.9 44.7 36.7 39.9 45.3 56.9 98.1 205 279 206 111 48.2

80 77.3 59.4 46.2 38.0 40.3 47.2 59.3 105 224 297 224 114 51.6

75 79.0 61.2 47.9 40.5 40.7 48.8 62.4 117 250 324 235 117 56.4

70 81.1 62.7 49.5 42.0 41.1 50.1 68.0 125 274 339 244 121 60.4

65 82.6 63.9 50.5 43.0 42.1 51.6 71.9 137 297 351 252 129 65.4

60 84.0 65.3 51.5 44.0 43.7 53.4 76.5 153 321 363 260 135 71.7

55 87.6 66.7 52.7 45.1 44.6 54.2 79.7 170 345 376 266 141 79.5

50 90.6 67.8 54.3 46.8 46.0 55.1 82.8 194 368 396 274 147 90.7

45 94.9 68.8 55.4 47.6 46.7 56.0 88.2 209 388 409 281 153 105

40 99.6 70.1 56.9 48.2 48.0 57.1 92.9 232 420 421 287 159 121

35 103 71.7 58.3 49.1 49.3 58.3 101 251 453 446 294 166 150

30 105 74.1 60.2 50.3 52.3 59.7 108 260 486 470 302 172 188

25 107 77.7 61.1 52.9 54.2 61.7 118 269 530 485 313 180 229

20 109 82.1 63.4 57.4 55.3 63.9 135 280 581 505 326 189 271

15 111 89.0 68.3 59.0 56.5 65.7 162 292 627 546 341 197 308

10 115 96.1 76.8 71.1 65.1 69.5 179 309 680 613 359 207 367

5 122 107 81.5 73.1 68.5 88.3 218 345 738 700 404 220 474
486

15-0.000-3M KOKCHA RIVER NEAR KESHEM, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge1 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 392 389 337 307 273

0.95 1.05 449 433 384 350 312

0.90 1.11 485 462 413 378 338

0.80 1.25 532 502 456 417 375

0.50 2 642 601 560 517 467

0.20 5 782 742 706 662 602

0.10 10 871 838 805 763 696

0.04 25 981 963 935 897 821

0.02 50 1,060 1,060 1,030 1,000 919

0.01 100 1,140 1,160 1,140 1,110 1,020

0.005 200 1,220 1,260 1,240 1,230 1,130

0.002 500 1,320 ng ng ng ng

1

Less than 10 years of data used.

15-0.000-3M KOKCHA RIVER NEAR KESHEM, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 31.6 31.6 32.0 32.6 34.2 35.5 37.2 40.4 50.5

0.10 10 33.1 33.2 33.6 34.2 35.8 37.1 38.9 41.9 52.1

0.20 5 35.2 35.4 35.8 36.3 37.8 39.3 41.0 43.9 54.3

0.50 2 40.0 40.3 40.6 41.2 42.5 44.2 45.7 48.3 59.1
487

15-0.000-3M KOKCHA RIVER NEAR KESHEM, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 31.4 32.0 32.7 34.4 34.9 36.5 37.5 41.2

0.10 10 33.0 33.6 34.3 35.9 37.5 39.6 40.7 45.3

0.20 5 35.4 36.0 36.7 38.1 40.9 43.2 44.5 50.0

0.50 2 41.5 42.1 42.7 44.0 47.5 50.0 51.4 58.0

June-July-August September-October-November

0.05 20 103 127 154 176 42.4 43.7 45.1 48.6

0.10 10 119 144 167 195 46.1 47.1 48.7 52.4

0.20 5 140 165 184 219 50.6 51.5 53.3 57.1

0.50 2 182 208 224 267 59.4 60.4 62.1 66.6

15-0.000-3M KOKCHA RIVER NEAR KESHEM, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1970 June 30, 1970 490 1978 June 29, 1978 930

1971 June 10, 1971 550 1973 June 12, 1973 800

1972 June 23, 1972 600 1977 June 24, 1977 800

1973 June 12, 1973 800 1975 June 18, 1975 659

1974 June 17, 1974 480 1976 July 8, 1976 650

1975 June 18, 1975 659 1972 June 23, 1972 600

1976 July 8, 1976 650 1971 June 10, 1971 550

1977 June 24, 1977 800 1970 June 30, 1970 490

1978 June 29, 1978 930 1974 June 17, 1974 480
488

15-0.000-3M KOKCHA RIVER NEAR KESHEM, Continued 

Monthly and annual mean discharges, in cubic meters per second 

 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1970 116 105 80.7 73.0 67.4 63.4 84.8 199 330 285 264 160 153

1971 96.1 59.8 46.0 43.0 40.5 49.6 89.8 215 390 307 296 141 148

1972 78.5 64.4 53.5 48.0 45.5 58.1 79.4 145 318 297 171 104 122

1973 80.1 67.0 50.4 38.6 43.2 67.5 132 260 621 527 287 179 197

1974 111 72.4 61.0 58.0 55.1 56 59 112 262 336 225 122 128

1975 87.5 64.1 54.0 49.3 46.3 55 153 239 417 424 303 160 172

1976 104 88.0 59.5 48.8 55.2 58.7 128 221 266 462 290 170 163

1977 93.2 71.3 58.6 40.7 39.0 39.6 49.3 105 352 505 254 142 147

1978 69.5 47.7 41.0 35.9 40.6 65.5 144 271 666 579 374 180 210
489

15-0.000-6M KOKCHA RIVER NEAR JURM

(U.S. Geological Survey identification number: 365600070520000)

LOCATION: Lat 36o56'N., long 70o52'E.

DRAINAGE AREA: 7,670 km2

.

ELEVATION: 1,449 meters above mean sea level.

PERIOD OF RECORD: October 1, 1969 to September 30, 1978.

GAGE: Water-stage recorder.

0

20

40

60

80

100

120

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
490

15-0.000-6M KOKCHA RIVER NEAR JURM, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 54.4 1970 35.3 1975 46.3 6.78 0.15 5.23

November 41.4 1974 29.4 1975 34.6 4.10 0.12 3.91

December 32.8 1977 24.0 1975 28.2 3.05 0.11 3.19

January 30.0 1970 19.1 1972 24.2 3.40 0.14 2.73

February 27.9 1974 17.2 1971 22.0 3.56 0.16 2.48

March 23.6 1971 17.9 1978 20.5 1.76 0.09 2.31

April 39.2 1971 18.2 1977 26.6 6.94 0.26 3.01

May 112 1971 38.0 1972 63.3 25.4 0.40 7.15

June 282 1973 107 1976 175 52.5 0.30 19.7

July 302 1973 150 1970 207 53.9 0.26 23.3

August 186 1973 112 1972 151 23.5 0.16 17.0

September 112 1970 69.5 1972 88.0 12.5 0.14 9.94

Annual 96.8 1973 58.2 1972 74.1 10.9 0.15 100
491

15-0.000-6M KOKCHA RIVER NEAR JURM, Continued 

Monthly and annual flow duration, in cubic meters per second 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 34.2 28.1 23.2 18.5 16.0 17.5 17.4 20.9 74.8 129 101 55.8 18.3

90 34.8 29.2 23.9 20.1 17.1 17.8 18.1 24.9 82.0 136 113 61.2 19.8

85 35.4 29.9 24.8 20.9 17.9 18.0 18.5 29.1 90.1 147 118 64.7 21.0

80 36.6 30.4 25.5 21.4 18.9 18.2 18.9 33.7 106 151 122 67.8 22.6

75 37.9 31.3 26.0 21.9 19.4 18.9 19.3 35.9 117 160 131 71.9 24.4

70 40.5 31.6 26.5 22.0 20.1 19.3 19.6 37.1 125 166 135 74.5 26.5

65 41.9 32.0 26.8 22.6 20.5 19.9 20.0 38.8 135 172 140 77.6 28.6

60 43.3 32.7 27.0 23.0 20.9 20.0 20.5 41.8 146 178 144 79.1 30.9

55 44.8 33.2 27.1 23.8 21.3 20.1 21.6 48.3 159 184 148 80.8 33.7

50 45.6 34.0 28.0 24.0 22.2 20.2 22.5 55.0 168 190 151 83.0 37.4

45 46.9 34.7 29.1 24.3 22.6 20.3 23.5 60.9 175 195 155 86.4 42.6

40 47.8 35.3 29.3 24.9 23.0 20.5 25.9 64.7 186 202 158 91.2 52.1

35 49.0 35.6 30.0 25.5 23.3 20.8 27.6 69.2 195 211 162 95.2 66.6

30 51.0 36.9 30.2 25.9 23.6 21.2 30.0 75.6 208 225 166 99.2 86.0

25 52.4 38.3 30.4 26.8 24.3 21.4 32.3 84.2 221 249 171 103 113

20 53.3 39.1 31.3 27.5 25.0 22.0 35.5 95.3 233 267 175 108 133

15 56.0 40.0 32.1 28.7 26.1 22.2 38.5 110 249 282 180 113 155

10 59.4 41.2 33.1 29.4 27.2 23.0 40.6 117 287 295 185 117 178

5 61.8 43.1 33.6 30.3 28.2 26.2 44.7 123 319 331 193 130 218
492

15-0.000-6M KOKCHA RIVER NEAR JURM, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge1 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 172 2158 162 148 140

0.95 1.05 203 185 183 171 159

0.90 1.11 223 202 197 185 170

0.80 1.25 251 225 215 204 186

0.50 2 318 281 262 249 223

0.20 5 409 355 326 306 272

0.10 10 470 403 370 342 304

0.04 25 548 464 426 387 343

0.02 50 607 510 469 420 373

0.01 100 666 555 513 453 402

0.005 200 727 601 559 485 432

0.002 500 810 ng ng ng ng

1

Less than 10 years of data used.

2

Data does not fit log-Pearson Type III curve, use with caution.

15-0.000-6M KOKCHA RIVER NEAR JURM, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 14.0 14.1 14.6 15.2 16.4 17.4 18.6 19.9 24.1

0.10 10 14.8 14.9 15.4 15.8 16.9 18.0 19.2 20.6 25.1

0.20 5 15.8 15.9 16.3 16.6 17.5 18.7 20.0 21.4 26.4

0.50 2 17.5 17.8 18.1 18.3 18.9 20.5 21.6 23.2 28.9
493

15-0.000-6M KOKCHA RIVER NEAR JURM, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 14.1 14.6 15.3 16.7 15.0 16.6 17.1 17.4

0.10 10 15.4 15.8 16.4 17.6 15.7 17.1 17.5 17.8

0.20 5 16.9 17.3 17.8 18.8 16.6 17.6 18.1 18.3

0.50 2 19.7 20.2 20.5 21.4 18.1 18.6 19 19.5

June-July-August September-October-November

0.05 20 47.5 57.9 69.5 103 26.0 26.2 26.9 28.4

0.10 10 57.1 67.1 77.7 110 26.9 27.2 27.8 29.3

0.20 5 69.6 79.1 88.6 120 28.1 28.4 29.0 30.6

0.50 2 94.6 104 112 140 30.6 31.0 31.7 33.6

15-0.000-6M KOKCHA RIVER NEAR JURM, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1970 June 29, 1970 240 1978 July 8, 1978 465

1971 June 11, 1971 230 1973 June 25, 1973 460

1972 June 22, 1972 310 1977 June 24, 1977 446

1973 June 25, 1973 460 1976 July 24, 1976 323

1974 July 1, 1974 233 1972 June 22, 1972 310

1975 June 19, 1975 296 1975 June 19, 1975 296

1976 July 24, 1976 323 1970 June 29, 1970 240

1977 June 24, 1977 446 1974 July 1, 1974 233

1978 July 8, 1978 465 1971 June 11, 1971 230
494

15-0.000-6M KOKCHA RIVER NEAR JURM, Continued 

Monthly and annual mean discharges, in cubic meters per second 

 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1970 54.4 38.4 30.2 30.0 24.8 20.9 28.6 71.8 156 150 152 112 72.7

1971 52.5 36.0 29.1 23.5 17.2 23.6 39.2 112 197 152 131 75.5 74.3

1972 37.0 30.5 24.8 19.1 17.4 19.1 19.0 38.0 146 165 112 69.5 58.2

1973 41.8 32.5 26.9 21.2 24.3 20.4 33.2 89.6 282 302 186 97.5 96.8

1974 51.4 41.4 32.0 27.5 27.9 22.4 20.3 39.2 127 172 125 81.2 64.2

1975 35.3 29.4 24.0 22.0 20.5 20.0 29.5 55.0 178 186 160 87.3 70.9

1976 48.9 35.1 27.6 24.4 23.2 20.9 24.9 53.0 107 257 163 89.4 73.3

1977 47.3 37.3 32.8 26.8 22.7 19.0 18.2 39.7 161 230 157 86.1 73.5

1978 47.8 30.6 26.6 23.4 19.8 17.9 26.7 71.6 217 245 169 93.6 82.8
495

15-1.L00-1A KESHEM RIVER NEAR KESHEM

(U.S. Geological Survey identification number: 365500070030000)

LOCATION: Lat 36o55'N., long 70o03'E.

DRAINAGE AREA: 2,145 km2

.

ELEVATION: 822 meters above mean sea level.

PERIOD OF RECORD: October 8, 1969 to September 30, 1978.

GAGE: Water-stage recorder.

0

5

10

15

20

25

30

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
496

15-1.L00-1A KESHEM RIVER NEAR KESHEM, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 12.2 1973 9.39 1972 11.4 0.99 0.09 4.78

November 10.6 1973 7.67 1974 8.93 1.05 0.12 3.75

December 10.1 1978 5.56 1970 7.60 1.54 0.20 3.19

January 8.25 1978 5.20 1970 6.45 1.11 0.17 2.71

February 8.01 1978 3.83 1972 5.84 1.48 0.25 2.46

March 11.7 1973 4.59 1974 7.09 2.11 0.30 2.98

April 24.4 1978 4.90 1974 14.5 6.65 0.46 6.1

May 48.3 1978 8.62 1974 28.6 11.1 0.39 12.0

June 74.7 1978 28.8 1974 50.7 16.6 0.33 21.3

July 83.8 1976 27.5 1970 50.1 19.8 0.40 21.00

August 41.3 1973 20.8 1974 29.5 6.12 0.21 12.4

September 23.4 1973 13.0 1971 17.2 3.84 0.22 7.25

Annual 26.2 1978 12.7 1974 20.5 4.85 0.24 100
497

15-1.L00-1A KESHEM RIVER NEAR KESHEM, Continued 

Monthly and annual flow duration, in cubic meters per second 

[ng, not given] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 8.72 6.87 5.27 4.81 3.67 4.28 4.62 5.83 23.0 24.8 19.3 10.5 4.81

90 9.41 7.22 5.88 5.11 4.29 4.60 5.62 9.81 26.7 26.2 21.4 11.9 5.52

85 9.72 7.63 6.03 5.24 4.56 4.82 6.15 12.4 29.8 28.3 22.7 12.6 6.12

80 9.96 7.88 6.17 5.43 4.60 5.05 7.26 15.2 32.4 30.8 23.3 13.4 6.94

75 10.3 8.24 6.28 5.51 4.65 5.26 8.06 17.6 35.3 33.8 23.7 14.0 7.52

70 10.5 8.30 6.40 5.64 4.69 5.44 8.57 19.2 38.9 36.0 24.1 14.4 8.07

65 10.7 8.36 6.50 5.71 4.80 5.69 9.30 20.6 40.8 38.2 24.9 14.8 8.60

60 11.0 8.68 6.60 5.90 5.04 5.93 10.3 22.0 42.7 40.1 25.9 15.2 9.32

55 11.2 8.75 7.09 5.97 5.57 6.14 10.9 23.7 44.5 41.8 26.7 16.0 10.1

50 11.5 8.86 7.38 6.26 5.76 6.39 11.6 26.7 46.4 44.2 27.7 16.5 11.1

45 11.6 9.02 7.88 6.55 5.87 6.69 12.6 29.1 48.7 46.4 29.8 17.1 12.7

40 11.8 9.16 8.15 6.63 6.06 7.18 14.0 32.9 52.7 48.9 31.1 17.7 15.0

35 12.1 9.34 8.29 6.86 6.58 7.61 15.4 35.6 56.3 52.4 32.6 18.4 18.7

30 12.3 9.60 8.44 7.17 6.82 7.86 16.7 38.2 59.4 57.2 34.0 19.2 23.3

25 12.4 9.83 8.64 7.58 7.35 8.18 18.2 41.1 62.2 61.1 35.3 20.7 28.1

20 12.6 10.0 8.83 7.74 7.49 8.57 20.8 44.1 65.7 65.6 36.6 21.9 34.2

15 13.0 10.4 9.05 7.97 7.59 8.85 22.2 46.8 69.8 72.1 38.1 22.6 40.9

10 13.2 10.5 9.35 8.13 7.79 9.26 25.1 48.9 75.9 82.1 40.2 23.6 47.8

5 13.7 11.0 9.74 ng 8.01 10.5 31.4 51.9 97.3 99.7 42.5 25.5 61.0
498

15-1.L00-1A KESHEM RIVER NEAR KESHEM, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge1 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 34.7 35.4 31.5 30.4 28.9

0.95 1.05 44.3 42.7 39.1 37.5 35.4

0.90 1.11 51.0 47.8 44.2 42.1 39.6

0.80 1.25 60.9 55.2 51.6 48.7 45.5

0.50 2 88.0 75.3 70.7 65.5 60.0

0.20 5 132 108 99.7 89.9 80.4

0.10 10 166 132 121 107 94.3

0.04 25 214 167 149 130 112

0.02 50 254 196 172 147 126

0.01 100 297 227 195 166 140

0.005 200 345 261 221 185 155

0.002 500 415 ng ng ng ng

1

Less than 10 years of data used.

15-1.L00-1A KESHEM RIVER NEAR KESHEM, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 2.85 2.90 3.10 3.43 3.54 4.08 4.48 4.86 6.30

0.10 10 3.16 3.24 3.45 3.76 3.88 4.36 4.77 5.17 6.60

0.20 5 3.60 3.70 3.93 4.22 4.35 4.75 5.17 5.60 7.00

0.50 2 4.63 4.77 5.05 5.28 5.46 5.70 6.11 6.57 7.87
499

15-1.L00-1A KESHEM RIVER NEAR KESHEM, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 3.00 3.28 3.54 3.77 3.25 3.64 4.00 4.60

0.10 10 3.36 3.64 3.86 4.06 3.57 3.94 4.28 4.91

0.20 5 3.84 4.13 4.30 4.46 4.03 4.37 4.67 5.36

0.50 2 4.98 5.27 5.34 5.44 5.15 5.41 5.67 6.57

June-July-August September-October-November

0.05 20 10.2 17.1 18.4 20.8 6.07 6.38 6.59 7.31

0.10 10 12.6 18.2 19.6 22.3 6.45 6.76 6.99 7.63

0.20 5 15.7 19.6 21.2 24.2 6.96 7.24 7.50 8.04

0.50 2 21.4 23.3 25.0 28.6 8.01 8.24 8.51 8.92

15-1.L00-1A KESHEM RIVER NEAR KESHEM, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1970 June 20, 1970 54.2 1977 June 24, 1977 177

1971 June 9, 1971 53.6 1976 July 10, 1976 150

1972 July 2, 1972 62.2 1978 April 29, 1978 149

1973 July 1, 1973 86.0 1975 June 16, 1975 94.4

1974 July 1, 1974 69.2 1973 July 1, 1973 86.0

1975 June 16, 1975 94.4 1974 July 1, 1974 69.2

1976 July 10, 1976 150 1972 July 2, 1972 62.2

1977 June 24, 1977 177 1970 June 20, 1970 54.2

1978 April 29, 1978 149 1971 June 9, 1971 53.6
500

15-1.L00-1A KESHEM RIVER NEAR KESHEM, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[--, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1970 -- 8.47 5.56 5.20 6.11 6.07 10.7 27.2 32.3 27.5 24.3 20.9 --

1971 11.9 8.46 6.97 6.07 4.73 6.29 13.1 29.5 40.0 32.4 27.0 13.0 16.7

1972 9.39 8.27 6.11 5.57 3.83 7.07 12.3 20.2 43.0 38.4 26.3 15.6 16.4

1973 12.2 10.6 8.83 7.71 7.56 11.7 20.4 38.0 62.4 56.6 41.3 23.4 25.2

1974 11.9 7.67 6.35 5.46 4.56 4.59 4.9 8.62 28.8 35.0 20.8 13.3 12.7

1975 10.3 7.76 7.14 5.61 4.88 6.08 12.9 31.1 53.6 46.0 32.5 16.7 19.6

1976 11.7 9.22 8.27 7.07 7.20 7.67 23.1 31.2 49.2 83.8 31.5 15.6 23.9

1977 11.7 10.0 9.08 7.08 5.72 5.59 8.90 23.2 72.5 77.5 27.7 14.8 22.9

1978 11.9 9.92 10.1 8.25 8.01 8.77 24.4 48.3 74.7 53.3 34.5 21.9 26.2
501

15-10.R00-1A WARDUJ RIVER AT SHASHPUL

(U.S. Geological Survey identification number: 370100070500000)

LOCATION: Lat 37o01'N., long 70o50'E.

DRAINAGE AREA: 4,485 km2.

ELEVATION: 1,407 meters above mean sea level.

PERIOD OF RECORD: October 1, 1969 to September 30, 1978.

GAGE: Water-stage recorder.

0

10

20

30

40

50

60

70

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
502

15-10.R00-1A WARDUJ RIVER AT SHASHPUL, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 45.1 1970 25.8 1972 31.3 5.82 0.19 4.99

November 30.5 1970 19.5 1976 23.5 3.30 0.14 3.74

December 23.5 1970 16.2 1976 19.1 2.17 0.11 3.04

January 23.2 1970 13.5 1972 15.8 2.91 0.18 2.52

February 21.0 1970 11.8 1972 14.6 2.75 0.19 2.33

March 16.0 1970 11.8 1975 13.6 1.34 0.10 2.17

April 29.2 1978 13.8 1977 20.4 4.99 0.24 3.25

May 70.6 1973 23.4 1974 45.2 17.6 0.39 7.21

June 203 1973 84.2 1976 134 39.7 0.30 21.3

July 184 1973 115 1970 146 27.9 0.19 23.3

August 126 1978 77.3 1974 105 15.4 0.15 16.7

September 74.1 1970 44.3 1974 59.5 11.3 0.19 9.48

Annual 66.4 1973 41.4 1974 52.5 8.14 0.15 100
503

15-10.R00-1A WARDUJ RIVER AT SHASHPUL, Continued 

Monthly and annual flow duration, in cubic meters per second 

[ng, not given] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 23.6 19.0 15.7 12.2 10.5 11.4 12.3 15.9 47.5 93.0 68.1 34.9 12.6

90 24.5 19.7 16.2 13.3 11.6 11.6 12.9 18.5 56.5 99.3 74.9 37.9 13.5

85 25.4 20.1 16.6 13.7 12.6 12.0 13.3 20.9 62.0 104 80.0 40.5 14.4

80 26.1 20.5 17.0 14.0 13.0 12.2 13.8 24.0 69.8 108 83.3 43.3 15.4

75 26.5 20.9 17.4 14.2 13.3 12.4 14.3 26.4 79.4 114 89.0 45.1 16.4

70 27.0 21.1 17.5 14.4 13.5 12.6 14.7 28.0 93.8 120 93.7 47.1 17.6

65 27.5 21.4 17.7 14.7 13.7 12.7 15.2 29.8 104 124 96.3 50.6 19.4

60 28.2 22.0 18.1 15.3 14.0 12.9 15.7 32.5 114 128 101 52.6 21.5

55 28.8 22.5 18.3 15.5 14.1 13.0 16.2 36.0 122 132 104 54.8 23.6

50 29.6 22.8 18.5 15.6 14.2 13.2 16.7 40.0 131 137 106 57.8 26.1

45 30.5 23.6 18.9 15.7 14.4 13.5 17.2 42.9 139 142 109 60.1 29.6

40 31.4 24.1 19.4 15.8 14.9 13.6 18.4 46.0 147 145 111 62.2 36.6

35 32.2 24.4 19.8 15.9 15.2 13.9 19.9 49.2 153 151 112 64.4 45.6

30 33.0 25.1 20.0 16.1 15.4 14.1 22.2 52.7 162 160 114 67.9 60.0

25 34.8 25.3 20.4 16.2 15.6 14.7 24.5 59.5 174 170 116 70.6 74.4

20 36.0 25.6 21.3 16.5 15.7 15.4 27.4 64.4 186 183 120 73.3 96.0

15 39.3 25.9 22.4 16.9 16.0 15.7 29.4 69.7 198 190 126 80.1 111

10 41.8 26.8 23.1 21.6 20.2 16.4 35.3 80.0 218 214 139 84.1 132

5 44.7 30.2 ng ng 21.3 17.7 38.9 97.3 252 239 147 95.9 163
504

15-10.R00-1A WARDUJ RIVER AT SHASHPUL, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge1 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 147 140 124 122 108

0.95 1.05 176 155 139 134 121

0.90 1.11 194 165 149 142 129

0.80 1.25 221 179 162 154 140

0.50 2 286 216 196 182 166

0.20 5 377 269 242 220 199

0.10 10 439 307 273 247 220

0.04 25 521 357 313 280 247

0.02 50 583 396 344 306 266

0.01 100 647 436 375 332 285

0.005 200 713 479 407 359 304

0.002 500 804 ng ng ng ng

1

Less than 10 years of data used.

15-10.R00-1A WARDUJ RIVER AT SHASHPUL, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 7.74 8.25 9.48 10.1 10.9 11.8 12.6 13.8 17.0

0.10 10 8.06 8.57 9.87 10.5 11.2 12.1 12.9 14.2 17.5

0.20 5 8.51 9.00 10.3 11.0 11.6 12.5 13.2 14.5 18.0

0.50 2 9.58 9.99 11.2 12.0 12.6 13.4 13.9 15.2 19.0
505

15-10.R00-1A WARDUJ RIVER AT SHASHPUL, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 7.52 9.51 10.7 11.8 8.4 9.43 10.4 11.5

0.10 10 8.28 10.1 11.1 12.1 9.01 10.2 10.9 11.9

0.20 5 9.34 10.9 11.6 12.5 9.76 11 11.4 12.4

0.50 2 11.9 12.9 13.3 13.8 11.2 12.2 12.4 13.3

June-July-August September-October-November

0.05 20 32.3 39.9 47.5 75.6 17.9 18 18.3 19.2

0.10 10 37.6 45.6 53.5 80.7 18.2 18.5 18.8 19.9

0.20 5 44.8 53.5 61.4 87.2 18.6 19.1 19.6 20.8

0.50 2 61.1 71.5 79.2 101 19.7 20.6 21.1 22.6

15-10.R00-1A WARDUJ RIVER AT SHASHPUL, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1970 July 2, 1970 226 1977 June 24, 1977 495

1971 June 10, 1971 239 1973 July 1, 1973 382

1972 July 4, 1972 180 1978 July 1, 1978 378

1973 July 1, 1973 382 1976 July 7, 1976 311

1974 June 30, 1974 232 1975 July 14, 1975 286

1975 July 14, 1975 286 1971 June 10, 1971 239

1976 July 7, 1976 311 1974 June 30, 1974 232

1977 June 24, 1977 495 1970 July 2, 1970 226

1978 July 1, 1978 378 1972 July 4, 1972 180
506

15-10.R00-1A WARDUJ RIVER AT SHASHPUL, Continued 

Monthly and annual mean discharges, in cubic meters per second 

 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1970 45.1 30.5 23.5 23.2 21.0 16.0 21.7 60.0 135 115 110 74.1 56.4

1971 34.0 25.9 21.3 15.1 12.0 13.8 25.3 67.0 147 120 110 50.0 53.7

1972 25.8 20.4 17.4 13.5 11.8 13.0 16.6 28.9 96.5 119 101 59.8 43.8

1973 32.8 24.2 18.0 13.9 13.2 12.5 23.6 70.6 203 184 125 72.1 66.4

1974 31.1 23.0 19.0 16.4 15.2 14.2 15.9 23.4 91.2 124 77.3 44.3 41.4

1975 27.0 21.2 18.3 15.2 14.1 11.8 17.9 36.9 132 140 102 53.1 49.3

1976 27.9 19.5 16.2 15.8 15.8 15.2 19.3 42.9 84.2 169 102 60.5 49.2

1977 28.5 22.8 18.7 15.4 13.7 12.7 13.8 28.1 135 170 91.0 48.6 50.1

1978 29.5 23.6 19.2 14.1 14.9 13.5 29.2 49.2 178 174 126 72.7 62.2
507

15-10.R00-2A WARDUJ RIVER NEAR BAHARAK

(U.S. Geological Survey identification number: 365800070540000)

LOCATION: Lat 36o58'N., long 70o54'E.

DRAINAGE AREA: 3,350 km2

.

ELEVATION: 1,465 meters above mean sea level.

PERIOD OF RECORD: April 22, 1969 to September 30, 1978.

GAGE: Water-stage recorder.

0

5

10

15

20

25

30

35

40

45

50

1945 1950 1955 1960 1965 1970 1975 1980 1985

DISCHARGE, IN CUBIC METERS PER SECOND

WATER YEAR

Annual mean discharge
508

15-10.R00-2A WARDUJ RIVER NEAR BAHARAK, Continued 

Statistics of monthly and annual mean discharges 

[m3/s, cubic meters per second] 

Month 

Maximum Minimum Mean 

Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Water year 

of 

occurrence 

 Discharge 

(m3/s) 

Standard 

deviation 

(m3/s) 

Coefficient 

of 

variation 

Percentage 

of annual 

discharge 

October 25.4 1970 18.8 1973 21.5 2.19 0.10 5.14

November 16.1 1973 14.3 1977 15.4 0.58 0.04 3.67

December 13.7 1973 11.4 1977 12.8 0.69 0.05 3.05

January 12.4 1970 9.86 1977 11.2 0.98 0.09 2.68

February 11.4 1973 8.44 1971 10.5 1.12 0.11 2.51

March 11.2 1972 7.38 1971 9.55 1.14 0.12 2.28

April 12.1 1978 7.35 1977 10.5 1.57 0.15 2.52

May 28.5 1971 10.3 1977 19.3 7.57 0.39 4.62

June 119 1973 43.9 1976 74.8 26.0 0.35 17.9

July 128 1978 73.3 1972 103 22.1 0.21 24.7

August 113 1969 61.0 1974 84.6 15.8 0.19 20.2

September 56.3 1973 36.2 1972 45.2 7.61 0.17 10.8

Annual 43.3 1978 28.4 1972 34.8 4.94 0.14 100
509

15-10.R00-2A WARDUJ RIVER NEAR BAHARAK, Continued 

Monthly and annual flow duration, in cubic meters per second 

[ng, not given] 

Percentage 

of days 

discharge 

equaled or 

exceeded 

Month 

Annual 

October November December January February March April May June July August September 

95 16.8 13.0 11.2 9.21 8.40 7.39 7.18 8.00 26.2 58.5 52.2 26.2 8.61

90 17.1 13.7 11.6 9.51 9.05 8.06 7.93 8.61 29.5 63.0 59.4 28.1 9.46

85 17.7 13.9 11.7 9.81 9.10 8.17 8.37 9.18 31.5 67.0 66.1 30.8 10.1

80 18.1 14.0 12.1 9.87 9.15 8.65 8.62 9.64 35.3 71.2 69.0 32.0 10.7

75 18.8 14.3 12.2 10.6 9.37 8.76 8.78 10.2 40.4 77.0 71.8 33.7 11.3

70 19.0 14.4 12.6 10.7 9.45 9.18 9.42 11.3 45.6 84.6 74.6 35.1 11.9

65 19.1 14.5 12.6 10.8 10.3 9.44 9.66 12.4 52.4 87.6 76.4 37.3 12.6

60 20.1 15.0 12.7 11.2 10.7 9.50 9.84 13.1 59.1 93.0 78.2 39.2 13.3

55 20.4 15.4 12.7 11.3 10.8 9.55 10.0 14.2 64.6 97.4 80.1 40.6 14.3

50 20.7 15.5 13.0 11.5 11.2 9.61 10.2 15.8 71.0 102 81.7 43.2 15.8

45 21.4 15.5 13.1 11.6 11.2 9.84 10.3 16.9 75.8 106 83.4 46.4 18.0

40 21.9 16.1 13.1 11.6 11.2 9.90 10.9 18.8 78.5 111 85.2 47.8 21.9

35 22.7 16.2 13.2 11.7 11.3 10.3 11.2 20.7 82.7 115 87.6 51.3 26.8

30 23.0 16.3 13.5 12.1 11.3 10.4 11.5 22.3 89.9 120 91.9 53.0 35.2

25 23.8 16.5 13.6 12.1 11.3 10.4 11.8 24.4 97.4 126 96.2 54.4 51.8

20 24.5 16.6 13.6 12.2 11.3 10.7 12.2 26.5 107 132 99.3 56.2 65.0

15 25.5 16.7 13.7 12.5 11.6 10.8 12.8 29.2 120 139 103 60.7 77.4

10 26.4 17.1 ng 12.6 11.7 11.1 13.5 33.6 132 147 112 63.3 90.0

5 28.1 18.0 ng 12.7 ng 11.3 14.4 44.0 156 158 123 68.5 113
510

15-10.R00-2A WARDUJ RIVER NEAR BAHARAK, Continued 

Probability of occurrence of annual high discharges 

[m3/s, cubic meters per second; ng, not given] 

Exceedance 

probability 

Recurrence 

interval 

(years) 

Maximum 

instantaneous 

discharge 

(m3/s) 

Maximum daily mean discharge (m3/s) 

3-day 

period 

7-day 

period 

15-day 

period 

30-day 

period 

0.99 1.01 107 80.6 74.8 70.2 65.9

0.95 1.05 132 98.0 90.9 83.1 76.5

0.90 1.11 147 108 100 90.7 82.9

0.80 1.25 166 120 111 101 91.2

0.50 2 205 145 133 122 110

0.20 5 246 171 154 146 131

0.10 10 269 185 165 159 145

0.04 25 293 198 176 175 160

0.02 50 308 207 1

182 186 171

0.01 100 322 215 1

188 196 181

0.005 200 335 222 1

192 205 191

0.002 500 350 ng ng ng ng

1

Data does not fit log-Pearson Type III curve, use with caution.

15-10.R00-2A WARDUJ RIVER NEAR BAHARAK, Continued 

Probability of occurrence of annual low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 3 7 14 30 60 90 120 183 

0.05 20 6.22 6.29 6.43 6.72 6.96 7.75 8.46 9.32 12.4

0.10 10 6.64 6.72 6.86 7.12 7.42 8.24 8.93 9.72 12.6

0.20 5 7.16 7.25 7.37 7.61 7.96 8.81 9.49 10.2 12.9

0.50 2 8.14 8.24 8.34 8.52 8.93 9.86 10.4 11.0 13.5
511

15-10.R00-2A WARDUJ RIVER NEAR BAHARAK, Continued 

Probability of occurrence of seasonal low discharges 

[m3/s, meters per second] 

Nonexceedance 

probability 

Recurrence 

interval 

(years) 

Minimum daily mean discharge (m3/s) 

Number of consecutive days 

1 7 14 30 1 7 14 30 

 December-January-February March-April-May

0.05 20 7.30 7.71 8.04 8.45 6.28 6.50 6.79 7.08

0.10 10 7.89 8.31 8.62 8.99 6.80 7.03 7.27 7.55

0.20 5 8.58 9.00 9.30 9.61 7.43 7.66 7.86 8.13

0.50 2 9.77 10.2 10.4 10.7 8.60 8.83 8.96 9.23

June-July-August September-October-November

0.05 20 16.2 20.3 24.5 43.9 11.9 12.3 12.6 14.3

0.10 10 18.6 23.1 27.5 48.0 12.4 12.7 13.1 14.6

0.20 5 21.9 27.2 31.9 53.6 12.9 13.2 13.6 14.9

0.50 2 29.8 38.4 43.7 66.6 13.7 14.1 14.4 15.4

15-10.R00-2A WARDUJ RIVER NEAR BAHARAK, Continued 

Annual peak discharges 

[m3/s, meters per second] 

 

Annual peak discharge, Annual peak discharge, 

by year from highest to lowest 

Water 

year Date 

Peak 

discharge 

(m3/s) 

 Water 

year Date 

Peak 

discharge 

(m3/s) 

1969 July 24, 1969 215 1977 June 23, 1977 288

1970 June 27, 1970 152 1973 June 25, 1973 243

1971 June 9, 1971 152 1978 June 30, 1978 231

1972 July 3, 1972 137 1976 July 7, 1976 217

1973 June 25, 1973 243 1969 July 24, 1969 215

1974 July 1, 1974 209 1975 July 16, 1975 215

1975 July 16, 1975 215 1974 July 1, 1974 209

1976 July 7, 1976 217 1970 June 27, 1970 152

1977 June 23, 1977 288 1971 June 9, 1971 152

1978 June 30, 1978 231 1972 July 3, 1972 137
512

15-10.R00-2A WARDUJ RIVER NEAR BAHARAK, Continued 

Monthly and annual mean discharges, in cubic meters per second 

[--, no data] 

Water 

year 

Monthly mean discharge Annual 

discharge October November December January February March April May June July August September 

1969 -- -- -- -- -- -- -- 10.9 60.8 123 113 44.6 --

1970 25.4 15.3 13.0 12.4 11.0 10.2 11.0 28.2 71.3 74.1 79.3 52.6 33.8

1971 21.8 15.5 12.5 9.90 8.44 7.38 9.02 28.5 90.6 76.4 82.2 37.7 33.5

1972 19.5 15.0 13.1 11.3 11.0 11.2 11.8 15.1 56.3 73.3 66.2 36.2 28.4

1973 18.8 16.1 13.7 12.3 11.4 9.68 11.8 26.7 119 110 97.2 56.3 42.1

1974 23.9 15.9 13.2 11.6 11.4 9.79 9.78 10.4 50.3 102 61.0 37.9 29.9

1975 19.4 15.6 13.2 11.9 11.3 10.3 11.5 20.6 64.9 98.1 89.5 47.4 34.6

1976 21.7 14.8 12.1 11.5 11.2 10.1 10.4 16.8 43.9 126 80.9 40.7 33.6

1977 20.6 14.3 11.4 9.86 9.38 8.51 7.35 10.3 74.7 121 76.2 42.4 34.0

1978 22.4 15.8 12.8 10.3 9.4 8.84 12.1 25.7 116 128 100 56.1 43.3
Prepared by the Pembroke Publishing Service Center.

For more information concerning this report, contact:

Chief

International Water Resources Branch

U.S. Geological Survey

420 National Center

Reston, VA 20192

vrschnei@usgs.gov

or visit our Web site at:

http://water.usgs.gov/international
Olson and Williams-Sether—Streamflow Characteristics at Streamgages in Northern Afghanistan and Selected Locations—Data Series 529

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