Prepared in cooperation with the 

New Jersey Department of Environmental Protection 

Streamflow Characteristics and Trends in 

New Jersey, Water Years 1897–2003 

Scientific Investigations Report 2005-5105 


U.S. Department of the Interior 

U.S. Geological Survey 
Cover.  Photo on cover shows U.S. Geological Survey streamflow-gaging station 01396500, South Branch Raritan River near

High Bridge, New Jersey. (Photograph by Rick Edwards, U.S. Geological Survey)
Streamflow Characteristics and Trends in 

New Jersey, Water Years 1897–2003

By Kara M. Watson, Robert G. Reiser, Steven P. Nieswand, and Robert D. Schopp

In cooperation with the

NEW JERSEY DEPARTMENT OF ENVIRONMENTAL PROTECTION

Scientific Investigations Report 2005-5105

U.S. Department of the Interior

U.S. Geological Survey
U.S. Department of the Interior

Gale A. Norton, Secretary

U.S. Geological Survey

P. Patrick Leahy, Acting Director

U.S. Geological Survey, Reston, Virginia: 2005

For sale by 

U.S. Geological Survey, Information Services

Box 25286, Denver Federal Center

Denver, CO 80225

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Telephone: 1-888-ASK-USGS

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endorsement by the U.S. Government.

Although this report is in the public domain, permission must be secured from the individual copyright owners to 

reproduce any copyrighted materials contained within this report.
Contents

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

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

Purpose and Scope ..............................................................................................................................2

Description of Study Area ...................................................................................................................2

Previous Investigations........................................................................................................................5

Methods of Study...........................................................................................................................................5

Continuous-Record Streamflow-Gaging Stations...........................................................................5

Flow-Duration Analysis...............................................................................................................8

Harmonic Mean Flow................................................................................................................10

Frequency Analysis ...................................................................................................................11

Trend Analysis ............................................................................................................................11

Streamflow Variability...............................................................................................................11

Partial-Record Stations .....................................................................................................................12

Streamflow Characteristics .......................................................................................................................17

Flow Statistics .....................................................................................................................................17

Streamflow Variability........................................................................................................................23

Trends in Streamflow .........................................................................................................................23

Comparison of Trends in Precipitation to Trends in Flow at Undeveloped Sites ..............................29

Trends in Peak Ratio at Selected Streamflow-Gaging Stations...........................................................32

Estimates of Low-Flow Statistics at Ungaged Sites ..............................................................................32

Ungaged Sites on Streams with Streamflow Data and No Regulation .....................................35

Ungaged Sites on Streams with Streamflow Data and Regulation............................................35

Ungaged Sites on Streams with No Streamflow Data and No Regulation ...............................39

Ungaged Sites Downstream from a Permitted Point Source......................................................39

Summary and Conclusions.........................................................................................................................41

Literature Cited.............................................................................................................................................42

Appendix 1. Indexes of selected continuous-record streamflow-gaging stations, low-flow 

partial-record stations, and gaging stations analyzed as partial-record stations in 

New Jersey .....................................................................................................................................60 

Appendix 2. Locations of streamflow-gaging stations by Watershed Management Areas ..........98

Appendix 3. Results of trend tests on annual n-day low and high flow at 138 gaging stations 

in New Jersey...............................................................................................................................120

Figures

1–5. Maps showing—

1. Locations of selected continuous-record streamflow-gaging stations, low-flow 

 partial-record stations, and streams within Climate Division 1, in New Jersey.........3

2. Locations of selected continuous-record streamflow-gaging stations, low-flow 

 partial-record stations, and streams within Climate Division 2, in New Jersey.........4

iii
3. Locations of continuous-record streamflow-gaging stations, low-flow partial-

 record stations, Watershed Management Areas, and water regions in 

 New Jersey and vicinity.......................................................................................................6

4. Physiographic provinces, climate divisions, and locations of National Weather 

 Service rain gages in New Jersey .....................................................................................7

5. Locations of continuous-record streamflow-gaging stations with land use in 

 New Jersey, 1995–97 ............................................................................................................9

 6–7. Graphs showing—

6. Flow-duration curves for South Branch Raritan River at High Bridge, N.J., 

 (01396500), and Great Egg Harbor River at Folsom, N.J. (01411000) ...........................10

7. Low-flow frequency curves for South Branch Raritan River at High Bridge, N.J. 

 (01396500)..............................................................................................................................12

8–12. Examples of—

8. Results generated by the MOVE1 correlation program listing statistics at 

 an index site and the estimated statistics at a partial-record station in 

 New Jersey ..........................................................................................................................14

9. Plots generated by the Maintenance of Variance Extension Type 1 (MOVE1) 

 correlation analysis program to evaluate the relation between base-flow 

 measurements at a low-flow partial-record station and daily mean flow at 

 an index site in New Jersey ..............................................................................................15

10. Summary statistics estimated by use of the Maintenance of Variance Extension 

 Type 1 (MOVE1) correlation program for South Branch Raritan River at 

 Middle Valley, N.J (site 01396280), and the weighted mean of the estimates 

 based on the standard error of estimation......................................................................16

11. Summary statistics for continuous-record streamflow-gaging stations in 

 New Jersey with 20 or more years of continuous streamflow record.......................18

12. Summary statistics for low-flow partial-record stations in New Jersey...................20

13–17. Graphs showing—

13. Relation of harmonic mean flow to 75-percent flow duration for 158 periods 

 of record at 138 gaging stations with greater than 10 years of record on 

 selected streams in New Jersey ......................................................................................22

14. Kendal Tau trend lines for 1-day high and 7-day low flows at continuous-record 

 streamflow-gaging stations on Flat Brook near Flatbrookville, N.J. (01440000), 

 and Rockaway River above the Reservoir at Boonton, N.J. (01380500).....................27

15. Total annual precipitation for New Jersey Climatic Divisions 1 and 2, water 

 years 1895–2001...................................................................................................................28

16. Annual 7-day low flow from water year 1919 through 2001 with a 10-year 

 moving average line for the continuous-record streamflow-gaging station 

 South Branch Raritan River near High Bridge, N.J. (01396500)...................................29

17. Results from Kendall Tau trend analysis of annual precipitation in New Jersey 

 (a) Climatic Divisions 1 and (b) 2 and from rain gages at (c) Boonton and 

 (d) Wertsville, New Jersey.................................................................................................31

18–22. Maps showing—

 18. Results of peak-ratio trend analysis, by physiographic province, in 

 New Jersey...........................................................................................................................34

19. Location of continuous-record streamflow-gaging stations and low-flow 

 partial-record stations in the North and South Branch Raritan Watershed 

 Management Area (WMA) in New Jersey......................................................................36

iv
Conversion Factors and Datum

Inch/Pound to SI

Multiply By To obtain

Length

inch (in.) 2.54 centimeter (cm)

inch (in.) 25.4 millimeter (mm)

Area

square mile (mi2) 259.0 hectare (ha)

square mile (mi2) 2.590 square kilometer (km2) 

Flow rate

cubic foot per second (ft3/s) 0.02832 cubic meter per second (m3/s)

Horizontal coordinate information is referenced to the North American Datum of 1983 (NAD 83).

Tables

1. Watershed Management Areas in New Jersey ....................................................................5

2. Streamflow-gaging stations on unregulated streams that drain undeveloped 

 basins in New Jersey..................................................................................................................8

3. Results of trend tests on the lowest annual n-day flow for the climatic year 

 ending March 31 and the winter period from November through April at 

 138 streamflow-gaging stations in New Jersey ...................................................................46

4. Results of trend tests on the highest annual n-day flow for the water year 

 ending September 30 and the winter period from November through April at 

 138 streamflow-gaging stations in New Jersey ...................................................................52

5a. Results of trend tests on records of highest and lowest annual n-day flow for 

 streamflow-gaging stations in New Jersey ..........................................................................25

5b. Significant results of trend tests on records of highest and lowest annual n-day 

 flow for streamflow-gaging stations in New Jersey............................................................25

6. Results from Kendall Tau trend analysis for total annual precipitation at selected 

 sites in New Jersey...................................................................................................................30

7. Results of analysis for trends in peak ratios at selected streamflow-gaging 

 stations in New Jersey .............................................................................................................33

20. Location of lakes, reservoirs, and selected streamflow-gaging stations 

 upstream from the Hackensack River in New Jersey and vicinity. ............................37

21. Locations of continuous-record streamflow-gaging stations, low-flow partial-

 record stations, and an ungaged site in the Hackensack and Pascack and the 

 Lower Passaic and Saddle Watershed Management Areas, New Jersey. ..............38

22. Locations of an ungaged site on an unnamed tributary to Lake Iliff and 

 continuous-record streamflow-gaging stations and low-flow partial-record 

 stations in the Upper Delaware and Wallkill Watershed Management Areas 

 in New Jersey. .....................................................................................................................40

v
Abstract

Streamflow statistics were computed for 111 continuousrecord streamflow-gaging stations with 20 or more years of 

continuous record and for 500 low-flow partial-record stations,

including 66 gaging stations with less than 20 years of continuous record. Daily mean streamflow data from water year 

1897 through water year 2001 were used for the computations 

at the gaging stations. (The water year is the 12-month period, 

October 1 through September 30, designated by the calendar 

year in which it ends). The characteristics presented for the 

long-term continuous-record stations are daily streamflow, 

harmonic mean flow, flow frequency, daily flow durations, 

trend analysis, and streamflow variability.

Low-flow statistics for gaging stations with less than 

20 years of record and for partial-record stations were estimated by correlating base-flow measurements with daily mean 

flows at long-term (more than 20 years) continuous-record 

stations. Instantaneous streamflow measurements through 

water year 2003 were used to estimate low-flow statistics at 

the partial-record stations. The characteristics presented for 

partial-record stations are mean annual flow; harmonic mean 

flow; and annual and winter low-flow frequency. 

The annual 1-, 7-, and 30-day low- and high-flow data 

sets were tested for trends. The results of trend tests for high 

flows indicate relations between upward trends for high flows 

and stream regulation, and high flows and development in the 

basin. The relation between development and low-flow trends 

does not appear to be as strong as for development and highflow trends. 

Monthly, seasonal, and annual precipitation data for 

selected long-term meteorological stations also were tested for 

trends to analyze the effects of climate. A significant upward 

trend in precipitation in northern New Jersey, Climate Division 

1 was identified. For Climate Division 2, no general increase 

in average precipitation was observed. Trend test results indicate that high flows at undeveloped, unregulated sites have not 

been affected by the increase in average precipitation. 

The ratio of instantaneous peak flow to 3-day mean flow, 

ratios of flow duration, ratios of high-flow/low-flow frequency, 

and coefficient of variation were used to define streamflow 

variability. Streamflow variability was significantly greater 

among the group of gaging stations located outside the Coastal 

Plain than among the group of gaging stations located in the 

Coastal Plain.

Introduction

Streamflow measurements and statistics are needed by 

water managers and planners. The magnitude and frequency of 

low and high streamflows in New Jersey are used for watershed management and planning purposes. High-flow statistics 

are used by engineers to design bridges, dams, and flood-control structures. Low-flow statistics are used by water-supply 

planners and regulatory agencies for reservoir design and for 

permitting purposes. Minimum passing flows and reservoir 

safe yields are concerns for water suppliers across New Jersey. 

The New Jersey Department of Environmental Protection 

(NJDEP) uses low-flow statistics for allocating surface-water 

withdrawals and for setting waste-load allocation limits for 

municipal and industrial facilities that discharge effluent to 

surface water. The statistics also are a critical part of studies 

of total maximum daily loads (TMDLs) and studies of the 

effects of point and nonpoint sources of contamination on the 

chemical and biological qualities of streams.

The U.S. Geological Survey (USGS), in cooperation 

with other Federal, State, and local agencies, has collected 

daily mean streamflow data in New Jersey since 1897 (Gillespie and Schopp, 1982). Daily mean flows currently (2005) 

are recorded at 92 continuous-record streamflow-gaging 

stations and previously were recorded at an additional 104 

gaging stations (Reed and others, 2003). Daily mean flows 

are used to compute streamflow statistics such as flow duration, and high-flow and low-flow frequency. They are used 

to describe the volume of water flowing past a site and the 

frequency of occurrence of flows of a given magnitude. The 

last published report of low-flow and flow-duration statistics 

for New Jersey streams included data through the 1975 water 

year (Gillespie and Schopp, 1982). Since the 1975 water 



 Words in bold are defined in the Glossary at the end of the report.



 Referred to as gaging station in this report.



 Water year is the 12-month period, October 1 through September 30,

 designated by the calendar year in which it ends.

Streamflow Characteristics and Trends in New Jersey, 

Water Years 1897–2003

By Kara M. Watson, Robert G. Reiser, Steven P. Nieswand, and Robert D. Schopp
year, an additional 26 years of data has been collected at many 

gaging stations. Twenty or more years of data have been collected at some new gaging stations that did not have any data 

available for analysis in the last study (Gillespie and Schopp, 

1982). Streamflow-gaging stations, streams, and climate divisions referenced in this report are shown in figures 1 and 2. 

The USGS, in cooperation with the NJDEP, has analyzed 

the continuous records of streamflow through the 2001 water 

year and the low-flow instantaneous measurements of streamflow at low-flow partial-record stations

 through the 2003 

water year to update low-flow statistics and flow-duration 

statistics and to compute other streamflow statistics for New 

Jersey streams. The additional data will provide more accurate 

long-term statistics for water managers. The statistics provided 

in this report, but not in previous reports, such as low-flow 

frequency for the winter season and harmonic mean flow, have 

been used by water managers in recent years for regulatory 

purposes. Statistics on high-flow frequencies for winter and 

annual periods, streamflow variability, and trend analysis also 

are provided in this report to assist those studying surfacewater hydrology and hydraulics in New Jersey.

Purpose and Scope

The purpose of this report is to update and expand the 

previous information on flow characteristics and flow duration of New Jersey streams provided by Gillespie and Schopp 

(1982). This report provides a source of updated streamflow 

statistics for water-resource managers and planners. Streamflow characteristics are presented for 111 gaging stations with 

20 or more years of record and 500 partial-record stations, 

including 42 gaging stations with less than 10 years of record 

and 24 gaging stations with 10 to 19 years of record, which 

were analyzed as partial-record stations. This report presents 

streamflow statistics for stations in New Jersey and a few 

stations in Pennsylvania and New York on major streams 

that could have an effect on New Jersey streams. Appendixes 

include an inventory of all gaging stations and partial-record 

stations analyzed in this study; maps of all continuous-record 

streamflow-gaging stations and low-flow partial-record stations in this report, by Watershed Management Area; and high 

and low-flow trend results.

Description of Study Area

New Jersey is divided into five water regions—the Passaic, Raritan, Upper Delaware, Lower Delaware, and Atlantic Coastal water regions. These regions are divided into 20 

Watershed Management Areas (table 1), which are subdivided 

into more than 100 individual watersheds. These management 

areas were established by NJDEP to manage and protect the 

freshwater resources in New Jersey (Watt, 2000). The Raritan 

River Basin (Watershed Management Areas 7, 8, 9, and 10) 

comprises an area of 1,105 mi2 in central and northern New 



 Referred to as partial-record stations in this report.

Jersey. It is the largest drainage basin entirely within the State 

of New Jersey (fig. 3).

New Jersey river basins drain areas spanning four physiographic provinces (fig. 4). The Piedmont, New England, and 

Valley and Ridge Provinces lie in northern New Jersey above 

the Fall line (fig. 4). The Coastal Plain Province encompasses 

southern New Jersey below the Fall line. The Valley and 

Ridge Province covers the northwestern part of the State in 

the Delaware River Basin and the Wallkill River Basin. The 

area is underlain by faulted and folded sedimentary layers of 

sandstone, shale, and limestone. Alternating belts of erosionresistant sandstone and less-resistant eroded shale and limestone create the long, parallel, northeast-southwest-trending 

ridges and valleys that are characteristic of the province. The 

New England Province is underlain predominately by granite, gneiss, and small amounts of marble of Precambrian age. 

These rocks are resistant to erosion and create a hilly upland 

dissected by the deep steep-sided valleys of major streams. 

The Piedmont Physiographic Province is a broad lowland that 

contains ridges underlain by interbedded sandstone, shale, 

conglomerate, basalt, and diabase. The Coastal Plain is mainly 

flat and is underlain by unconsolidated layers of sand, silt, and 

clay (New Jersey Department of Environmental Protection and 

Energy, 1992).

Land-use information was derived for each of the drainage basins associated with the gaging stations studied. The 

land uses for gaging stations with drainage areas entirely in 

New Jersey were derived from a geographic information system (GIS) coverage developed from 1995/97 digital infrared 

aerial photos (N.J. Department of Environmental Protection, 

2000) through use of the Anderson method of classification 

(Anderson and others, 1976). For these gaging stations, a 

30-meter-grid digital elevation model (DEM) coverage of 

New Jersey and coordinates of the site location were used to 

create a basin boundary for each site. The 1995/97 land-use 

coverage was overlaid on the basin polygon. The size of the 

basin and the size of each land-use area within the basin were 

used to compute the land-use percentages. Land-use information for the Delaware, Neversink, Lehigh, and Schuykill River 

gaging stations is from 1992 Multi-Resolution Land Characteristics/National Land Cover Data (MRLC/NLCD) produced 

by a Federal consortium at the Earth Resource Observation 

Systems (EROS) data center. The base data set was Landsat 

Thematic Mapper data, nominal-1992 acquisitions (Jeffrey 

Fischer, U.S. Geological Survey, written commun., 2003). 

Land use was characterized as developed or undeveloped on 

the basis of the per­centages of urban, agricultural, forested, 

wetland, open water, and barren land in each basin. The urban 

land-use category is a composite of residential, commercial, 

and industrial uses. Developed land is defined as the sum of 

urban and agricultural land uses. Undeveloped land is defined 

as the sum of forested, wetland, open water, and barren land 

areas. For this study, 14 gaging stations with drainage basins 

in which 86 to 100 percent of the area is undeveloped were 

categorized as undeveloped (table 2).

   Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Figure 1. Locations of selected continuous-record streamflow-gaging stations, low-flow partial-record stations, and streams within Climate Division 1, in 

New Jersey.

Introduction   

ARE LAW DE

PENNSYLVANIA

NE

W YORK

CLIMATE

DIVISION 1

TLANTIC OCEAN A

0 10 20 MILES0 10 20 KILOMETERS

75° 74°

41°40°39°

F al t B or ok

aP ul ni s Kill

r evi R

Pequest

R vi er

Muscone ct ong R vi er

Sp ur ce Run

Mu hl ockaway

Creek

Delaware

River

De al ware

R vi er

Sou ht B ar nch

Rari at n R vi er

R

not gni maL vi er

Raritan River

De al wa er

R

dna ari at n

Canal

Wh pi pany R vi er

Pompton

River

r evi R el ddaS

r evi Rkcasnekca H

Third R vi er

Second

River

Elizabeth River

Lawrence B or o

Blue MineBrook

k

R A R I TA N

B A Y

a W l kl li l

Base from U.S. Geological Surveydigital line graph files, 1:24,000

N

E

W YORK

PENNSYLVANI

A

01396280

01381900

01460440

01440000

01405030

01398045

01396500

01393450

01392500

01392210

01392000

01391500

01386500

01384500

01380500

01379773

E

X

PLA

N

ATI

O

N

Climate division boundary--From National Climatic Data CenterContinuous-record streamflow gaging station and station identification numberLow-flow partial-record station and station identification number

,

1:24,0000 vector digital data file, 1991

01379773

01381900

0 5 10 MILES0 5 10 KILOMETERS

75°

41°

74°30' 74°

40°30'

Climate Division 1

NEW JERSEY
Figure 2. Locations of selected continuous-record streamflow-gaging stations, low-flow partial-record stations, and streams within Climate Division 2, in 

New Jersey.

 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003

ARE LAW DE

PENNSYLVANIA

NE

W YORK

CLIMATE

DIVISION 2

TLANTIC OCEAN A

0 10 20 MILES0 10 20 KILOMETERS

75° 74°

41°40°39° Climate Division 2

NEW JERSEY

De al ware

R vi er

R A R I TA N

B A Y

Great Egg Harbor River

Salem

River

Maurice River

Assunpink

Creek

Raritan River

eD wal are

R dna ari at n Can al

L

wa

er nce B or ok

Base from U.S. Geological Surveydigital line graph files, 1:24,000

PENNSYLVANI

A

DELAWARE

TLANTIC OCEAN A

KILOMETERS

MILES 0 10 20

0 10 20

E

X

PLA

N

ATI

O

N

Climate division boundary--From National Climatic Data Center

Continuous-record streamflow gaging station and station identification number

,

1:24,0000 vector digital data file, 1991

01482500

01466500

01466000

01463500

01460440

01412800

01412500

01411000

01405030 01398045

01411000

75° 74°

41°39°
 The land uses in the drainage basins upstream from the 

gaging stations studied range from 100-percent undeveloped to 

93-percent developed. Gaging stations on McDonalds Branch 

in Lebanon State Forest (01466500) and Middle Branch 

Mount Misery Brook in Lebanon State Forest (01466000) 

(fig. 5) are in areas that are 100-percent undeveloped. These 

two gaging stations are in the Pinelands area of southern New 

Jersey. A total of seven gaging stations in the Pinelands area 

of southern New Jersey, three gaging stations in northwestern 

New Jersey, and one gaging station on the east coast of New 

Jersey drain areas that are more than 90 percent undeveloped. 

More than 90-percent of the land use upstream from Second 

River at Belleville (01392500), Elizabeth River at Ursino Lake 

at Elizabeth (01393450), Third River at Passaic (01392210), 

and Weasel Brook at Clifton (01392000) (fig. 5) is urban. 

More than 70 percent of the land use upstream from West 

Branch Cohansey River at Seeley (01412500), Cohansey 

River at Seeley (01412800), and Salem River at Woodstown 

(01482500) (fig. 5) is agricultural. 

Previous Investigations

The USGS began a statewide program of base-flow monitoring in 1958, in cooperation with the New Jersey Department of Conservation and Economic Development, Division 

of Water Policy and Supply. The purpose of the program was 

to determine minimum daily flow for streams in the State as 

required by a surface-water diversion law. Minimum daily 

flows at partial-record stations were estimated by graphically 

correlating base-flow measurements to daily mean flows at 

gaging stations. A report by Buchanan and others (1965) documents minimum daily flows at gaging stations and locations of 

partial-record stations and gives an example of the graphical 

correlation technique.

 The monitoring program has been continued through 

the years as a cooperative project with NJDEP to collect 

base-flow data at locations with little or no streamflow data. 

Gillespie and Schopp (1982) computed 7-day 2-year low flow 

(7Q2), 7-day 10-year low flow (7Q10), and flow durations 

for 105 gaging stations in New Jersey and neighboring States. 

A regression method was used to calculate 7Q2 and 7Q10 

for 417 low-flow partial-record stations and gaging stations 

in New Jersey with less than 7 years of record. The statistics 

were computed from flow data for gaging stations through 

water year 1975. 

Methods of Study

Streamflow characteristics were analyzed for long-term 

gaging stations, partial-record stations, and gaging stations 

with less then 20 years of record analyzed as partial-record 

stations. The characteristics studied for gaging stations are 

daily streamflow, harmonic mean flow, flow frequency, daily 

flow durations, trend analysis, and streamflow variability. 

Characteristics studied for partial-record stations are mean 

annual flow, harmonic mean flow, and annual and winter lowflow frequency.

Continuous-Record Streamflow-Gaging Stations

Low-flow and high-flow statistics were computed from 

continuous records of streamflow collected at 111 gaging 

stations across New Jersey that have 20 or more years of 

record. Streamflow-gaging stations provide flow data at 

regular intervals throughout the day. The data, usually 

collected at 15-minute intervals, are used to compute daily 

mean-flow values. A series of data sets representing the 

lowest mean discharge for each year for a specified number 

of consecutive days are generated for each gaging station. 

A Log Pearson Type III frequency distribution typically is 

used to compute low-flow statistics for gaging stations. 

Table 1. Watershed Management Areas in New Jersey. 

[See figure 1 for New Jersey Department of Environmental Protection 

Watershed Management Areas]

Number

Watershed Management Area

Water region

Name

01 Upper Delaware Upper Delaware

02 Wallkill Upper Delaware

03 Pompton, Pequannock, Wanaque, 

Ramapo 

Passaic

04 Lower Passaic, Saddle Passaic

05 Hackensack, Hudson, Pascack Passaic

06 Upper and Mid Passaic, Whippany, 

Rockaway 

Passaic

07 Arthur Kill Raritan

08 North and South Branch Raritan Raritan

09 Lower Raritan, South River, Lawrence Raritan

10 Millstone Raritan

11 Central Delaware Upper Delaware

12 Monmouth Atlantic Coastal

13 Barnegat Bay Atlantic Coastal

14 Mullica Atlantic Coastal

15 Great Egg Harbor Atlantic Coastal

16 Cape May Atlantic Coastal

17 Maurice, Salem, Cohansey Lower Delaware

18 Lower Delaware Lower Delaware

19 Rancocas Lower Delaware

20 Assiscunk, Crosswicks, Doctors Lower Delaware

Methods of Study 
Figure 3. Locations of continuous-record streamflow-gaging stations, low-flow partial-record stations, Watershed 

Management Areas, and water regions in New Jersey and vicinity. (Watershed Management Area names are listed 

in table 1.)

 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003

N E W Y O R K

P E N N S Y L V A N I A

D

E L A

W

A

R

E

C O N N E C T I C U T

A T L A N T I C O C E A N

N E W Y O R K

Base from U.S. Geological Survey

digital line graph files, 1:24,000

0 10 20 MILES

0 10 20 KILOMETERS

75° 74°

41°

40°

39°

EXPLANATION

WATER REGION

Passaic

Raritan

Atlantic Coastal

Upper Delaware

Lower Delaware

Continuous-record streamflowgaging station

Low-flow partial-record station

20

Watershed Management Area

boundary and number

(From N.J. Department of

Environmental Protection,

1:24,000 digital line graph file,

2000)

17

01

14

13

15

08

18

06

19

09

12

10

11

20

03

02

04

16

07

05
Figure 4. Physiographic provinces, climate divisions, and locations of National Weather Service rain gages in 

New Jersey.

Methods of Study   

N E W Y O R K

P E N N S Y L V A N I A

D

E L A

W

A

R

E

CONNECTICUT

A T L

A

N

T I C

 O

C

E A

N

N E W Y O R K

NEWTON

RINGWOOD

PEMBERTON

BOONTON 1

WERTSVILLE

LONG VALLEY

LONG BRANCH

INDIAN MILLS

01386500

01384500

01379773

01466500

Base from U.S. Geological Survey

digital line graph files, 1:24,000

0 10 20 MILES

0 10 20 KILOMETERS

EXPLANATION

Valley and Ridge

New England

Piedmont

Coastal Plain

New Jersey climate division

boundary (From the National 

Climatic Data Center, 1:24,000 

digital line graph file, 1991)

Fall line

National Weather Service 

rain gage

75° 74°

41°

40°

39°

Climate Division 1

Climate Division 2

PHYSIOGRAPHIC PROVINCE

01466500 Continuous-record streamflowgaging station and station 

identification number
A low-flow frequency curve is computed for each series of 

measurements as described in Riggs (1972). The statistics 

computed at the gaging stations are used as a basis for 

estimating low-flow statistics at ungaged sites and at the 66 

gaging stations with less than 20 years of record.

Two exceptions were made to the guideline established 

for categorizing gaging stations with 20 or more years of 

record as continuous-record stations. The gaging station on 

Lawrence Brook at Westons Mills, N.J. (01405030) (fig. 1), 

has less than 20 years of continuous record. For this study, 

statistics were computed using the continuous-gage record 

because the flow passing the gaging station is regulated and 

statistically significant correlations with other long-term 

gaging stations do not exist. The other exception is the gaging 

station at Passaic River at Pine Brook, N.J. (01381900) 

(fig. 1), with 22 years of continuous record. This gaging 

station is considered to be a partial-record station for this study 

because of its proximity to other gaging stations upstream and 

downstream from the site with more than 70 years of record.

Flow-Duration Analysis

A flow-duration curve is a cumulative frequency curve 

that shows the percentage of time specified flows are equaled 

or exceeded for a given period of time (Searcy, 1959). Flowduration curves were computed for each gaging station from 

daily mean flows for the entire period of record. Daily mean 

flows for the entire period of record were arranged in order 

of magnitude and divided into 35 classes. A curve was drawn 

through the average discharge for each class in relation to 

the percentage of time that flow was equaled or exceeded. 

The flow-duration curve shows the daily mean flow that was 

exceeded for the indicated percentage of time. 

The flow-duration curve is useful for analyzing the availability and variability of streamflow. The flow-duration curve, 

when based on many years of record, indicates the probable 

future behavior of a stream, assuming the basin will not be 

substantially altered by man’s activities (Searcy, 1959). The 

shape of the flow-duration curve is indicative of hydrologic 

conditions in the drainage basin. A curve with a steep slope is 

indicative of a basin with highly variable flow with most of the 

streamflow coming from direct runoff. A gaging station on a 

stream that drains an area with steep topography and shallow 

soils will have a flow-duration curve with a steep slope. A flat 

flow-duration curve is typical of a stream that drains an area 

with flat topography and a high percentage of land area classified as wetlands. An appreciable part of streamflow at these 

gaging stations is contributed by ground water. 

The flow-duration curves at two gaging stations with 

similar drainage areas are shown in figure 6. The Great Egg 

Harbor River (fig. 2) drains an area that is representative of 

flat topography in the Coastal Plain Physiographic Province 

of southern New Jersey. The South Branch Raritan River 

(fig. 1) drains an area of steeper topography in the New 

England Physiographic Province. The flow-duration curve for 

the South Branch Raritan River gaging station (01396500) has 

Table 2. Streamflow-gaging stations on unregulated streams that drain undeveloped basins in New Jersey.

[Undeveloped basins contain less than 15-percent developed land; %, percent; ID, identification; see figure 5 for gaging station 

locations with land use]

Station ID Station name Urban

(%)

Agriculture

(%)

Total developed

(%)

Climate 

division

01384500 Ringwood Creek near Wanaque, N.J. 14.03 0.00 14.03 1

01409400 Mullica River near Batsto, N.J. 6.31 5.99 12.30 2

01379773 Green Pond Brook at Picatinny Arsenal, N.J. 11.53 .31 11.83 1

01411300 Tuckahoe River at Head of River, N.J. 3.96 7.75 11.71 2

01440000 Flat Brook near Flatbrookville, N.J. 3.03 5.34 8.37 1

01409810 West Branch Wading River near Jenkins, N.J. .84 6.60 7.44 2

01409000 Cedar Creek at Lanoka Harbor, N.J. 5.41 .52 5.93 2

01386500 Blue Mine Brook near Wanaque, N.J. 5.01 .46 5.47 1

01409095 Oyster Creek near Brookville, N.J. 2.66 .65 3.31 2

01410000 Oswego River at Harrisville, N.J. .93 1.85 2.78 2

01410150 East Branch Bass River near New Gretna, N.J. 2.00 .00 2.00 2

01409280 Westecunk Creek at Stafford Forge, N.J. .80 .50 1.30 2

01466000 MB Mt Misery Bk in Lebanon State Forest, N.J. .00 .00 .00 2

01466500 McDonalds Branch in Lebanon State Forest, N.J. .00 .00 .00 2

   Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Figure 5. Locations of continuous-record streamflow-gaging stations with land use in New Jersey, 1995–97.

Methods of Study   
a steeper slope than the flow-duration curve for the Great Egg 

Harbor River gaging station (01411000). The flow per square 

mile at 1-percent flow duration at gaging station 01396500 

is twice as high as at gaging station 01411000. Flows greater 

than 70-percent flow duration are higher and flows less than 

80-percent flow duration are lower at gaging station 01396500 

than at gaging station 01411000. 

Harmonic Mean Flow

Harmonic mean flow is a statistic used as a design flow

applied to water-quality criteria for the protection of human 

health under lifetime exposure to toxic contaminants (Rossman, 1990). The harmonic mean flow is defined as the reciprocal of the mean of the reciprocal of the daily flows or

The formula for harmonic mean flow cannot be used 

directly when daily mean flows of zero are present in the 

data set. To adjust for zero flows, the harmonic mean of the 

nonzero daily mean streamflows was multiplied by the ratio of 

QHM

N

1 Q1 ⁄ 1 Q2 ⁄ ... 1 QN + + + ⁄ = ------------------------------------------------------------------------- , (1)

where

QHM = harmonic mean flow,

N = number of days,

and

Q1 = streamflow on day 1.

10,000

5,000

2,000

1,000

500

200

100

50

20

10

DISCHARGE, IN CUBIC FEET PER SECOND

0.01 0.1 1 2 5 10 20 30 40 50 60 70 80 90 95 98 99 99.9

PERCENT OF TIME INDICATED DISCHARGE WAS EXCEEDED

South Branch Raritan 

River (01396500) 

Great Egg Harbor 

River (01411000)

Figure 6. Flow-duration curves for South Branch Raritan River at High Bridge, N.J., (01396500), and Great Egg Harbor River at 

Folsom, N.J. (01411000).

10 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
the number of nonzero daily mean flows to the total number 

of daily mean flows in the period of record analyzed (Martin 

and Ruhl, 1993). The proportional adjustment for zero flows is 

consistent with current U.S. Environmental Protection Agency 

design flow methodology (Rossman, 1990). Harmonic mean 

flow is always lower or equal to the arithmetic mean flow 

because harmonic mean gives greater weight to the lowest 

daily mean flows. 

Frequency Analysis

A frequency curve relates the magnitude of a variable to 

frequency of occurrence (Riggs, 1968). Daily streamflow data 

were analyzed to determine the frequency of occurrence of 

low-flow and high-flow events. Frequency curves of low- and 

high-flow events were developed for both annual and winter 

periods (November–April). The magnitude of low- and highflow events is inversely related to the frequency of occurrence. 

The recurrence interval is the average length of time between 

exceedances or non-exceedances of a particular magnitude 

(Riggs, 1968).

The minimum average flow for a given period of days is 

used to develop a low-flow frequency curve, and the maximum 

average flow is used to develop a high-flow frequency curve. 

The period of days used is referred to as the n-day period. For 

this study, frequency statistics were computed for the minimum and maximum average 1-day, 7-day, and 30-day flows 

for each year or season of each year for the period of record. 

When analyzing low flow, the probability that a streamflow 

is not exceeded for a given period of time (annual or winter 

season) is referred to as the non-exceedance probability. The 

probability that streamflow is exceeded for a given period of 

time is referred to as the exceedance probability.

A log Pearson Type III frequency distribution was used 

for this study because it usually fits the distribution of streamflows well. The log Pearson Type III frequency curves were 

examined for each gaging station using the USGS program 

SWSTAT (Flynn, and others, 1995). The log Pearson Type III 

distribution can be represented by the equation (Telis, 1991)

A frequency curve was hand drawn on log probability paper when the SWSTAT method for log Pearson Type 

III curve did not fit the data. The program did not generate 

frequency curves for various data sets at seven gaging stations 

because of large skews in the data, mainly as a result of regulation at low streamflow. 

An example of low-flow frequency curves for South 

Branch Raritan River at High Bridge, New Jersey (01396500) 

is shown in figure 7. The plot shows the frequency distribution 

for 1-day, 3-day, 7-day, 30-day, and 90-day annual low flows. 

The curves are log Pearson Type III frequency distributions.

Trend Analysis

The time series of selected streamflow characteristics at 

each gaging station with more than 10 years of daily streamflow records were evaluated for trends using the Kendall’s Tau 

test (Helsel and Hirsch, 2002). The same test was applied to 

annual and monthly precipitation data, annual coefficient of 

variation, and peak-flow ratios. This is a nonparametric test 

designed for data that are not normally distributed. Kendall’s 

Tau was used to identify changes in the streamflow and precipitation data over time. The test determines the probability 

that the null hypothesis of no significant trend can be rejected 

with a low risk of error. A p-value equal to 0.05 indicates there 

is a 95-percent chance that a trend is present. For this study, a 

trend test on the annual and monthly data series with a p-value 

of less than or equal to 0.05 is considered a significant result. 

A negative Kendall Tau coefficient indicates a downward 

trend. A positive Tau value indicates an upward trend.

Streamflow Variability

The variability at a gaging station was measured using a 

few different statistics. The coefficient of variation, the ratio of 

instantaneous peak flow to 3-day mean flow surrounding the 

peak, the ratios of 25-percent/75-percent and 10-percent/

90-percent flow durations, and the ratios of 1-day 2-year high 

flow/1-day 2-year low flow and 1-day 20-year high flow/

1-day 20-year low flow were tested as measures of streamflow 

variability. The ratio statistics were computed for the entire 

period of record. 

The Wilcoxon rank sum test was used to test for differences in the means of two data sets. It is the non-parametric 

equivalent to a t-test. The null hypothesis (HO) states that 

mean rank of the streamflow variability statistics are equal 

between two groups. A p-value of 0.05 was used to minimize 

the chance that the difference occurred by chance alone. 

Comparisons were made between gaging stations grouped by 

physiographic province and by land use. 

The coefficient of variation was computed for the entire 

period of record at all gaging stations with 20 or more years 

of record and for each complete water year in the record. The 

coefficient of variation is the standard deviation divided by the 

mean of the data set (Ott, 1988). The coefficient of variation 

, (2)

where

Qt = n-day flow,

t = recurrence interval in years,

X = mean of the base 10 logarithms of the 

annual or seasonal n-day flows,

Kt = frequency factor that is a function of the 

recurrence interval and the coefficient of 

skew,

and

S = standard deviation of the logarithms of the 

annual or seasonal n-day flows.

Qt log( ) X Kt = + S

Methods of Study 11
allows for direct comparisons in variability of streamflow 

between gaging stations with differences in daily mean flows. 

The annual coefficient of variation was calculated for selected 

gaging stations and tested for trends. 

The peak ratio is determined from annual peak flow, 

which is the maximum instantaneous streamflow value for the 

water year, divided by the 3-day mean flow for 3 consecutive 

days including the day before, day of, and day after the peak. 

Peak ratio is a measure of the magnitude of the rise and fall of 

a stream over a given period of time. Environmental factors 

can effect a change in the peak ratio at a gaging station for a 

given amount and duration of precipitation. Changes in the 

amount of impervious surfaces, vegetative cover in riparian 

areas, and land uses in a drainage area can cause changes in 

the capacity of a watershed to attenuate and store runoff, causing changes in the peak ratio over time. The peak ratio trend 

was determined for selected gaging stations using the Kendall’s Tau test (Helsel and Hirsch, 2002). The test determines 

the probability that the null hypothesis of no significant trend 

can be rejected with a low risk of error. A p-value equal to 

0.05 indicates there is a 95-percent chance that a trend is present. For this study, a trend test on the peak ratio with a p-value 

of less than or equal to 0.05 is considered a significant result. 

Partial-Record Stations

Instantaneous streamflow measurements made at baseflow conditions are used to estimate low-flow statistics at 

gaging stations with less than 20 years of record and at sites 

on streams without any continuous record of streamflow. 

Base-flow measurements are made periodically at low-flow 

partial-record stations, water-quality sampling sites, creststage gaging stations, and miscellaneous sites established for 

special USGS studies. From 1959 through 2003, base-flow 

measurements were made at 500 low-flow partial-record 

140

130

120

110

100

90

80

70

60

50

40

30

20

10

DISCHARGE, IN CUBIC FEET PER SECOND

1 2 5 10 20 30 40 50 60 70 80 90 95 98 99

PROBABILTY OF NON-EXCEEDANCE

1 day

3 day 

7 day

30 day

90 day

LOW-FLOW FREQUENCY

CURVES

Figure 7. Low-flow frequency curves for South Branch Raritan River at High Bridge, N.J. (01396500).

12 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
stations. Currently (2005), base-flow conditions are measured 

2 to 3 times a year at more than 40 low-flow sites. Typically, 

10 to 12 base-flow measurements made over a 5- to 6-year 

period provide an adequate amount of data to establish a 

correlation between low-flow conditions at a continuousrecord gaging station and those at the low-flow station. 

Recently, base flow has been measured at sites that had 

been inactive for many years in order to investigate possible 

changes in base flow. During water year 2001, one or more 

measurements of base flow were made at 105 active and 

previously inactive low-flow stations. 

Instantaneous base-flow measurements at partial-record 

stations were correlated to daily mean flow at gaging stations 

in basins with similar hydrologic conditions. The low-flow 

statistics were estimated by using the Maintenance of Variance 

Extension Type 1 (MOVE1) method of correlation analysis (Hirsch, 1982) when an adequate number of base-flow 

measurements were available. The MOVE1 method fits a 

straight line to a data set. MOVE1, also known as the organic 

line of correlation, was proposed as a linear fitting procedure 

in hydrology and is further explained by Helsel and Hirsch 

(2002). The flows are transformed to logarithms to make the 

distribution of data more symmetrical and the relation more 

linear. The correlation coefficient and standard error of estimate are used as measures of accuracy. Daily mean flows from 

at least three gaging stations, referred to as index sites in the 

MOVE1 program, are correlated with measurements at each 

partial-record station. A weighted mean of all the estimates is 

computed on the basis of the standard error of estimate.

Only measurements made at base-flow conditions are 

used in the MOVE1 analysis. Tests to evaluate base-flow 

conditions at the index site and changes in stage at the lowflow station are used to determine whether measurements 

were made at base-flow conditions. A base-flow test is 

applied to the daily mean flows at the index site. Data are 

defined as being base flow when the daily mean flow at the 

index site drops by less than 30 percent or rises by less than 

10 percent from the previous day. A test of conditions during 

streamflow measurement is made to reject measurements with 

a change in stage during the measurement of greater than 

0.02 ft, unless a tide or control structure adjustment was made 

to the measured flow. 

An additional test is sometimes performed on the 

previous two days of daily flow at the index site before the 

measurement was made. This test is performed only when 

measurements in the database are flagged as being base flow. 

If the daily flows do not pass the base-flow test, an estimated 

daily base flow is used for the index site when the base-flow 

measurement is flagged as such. Linear extrapolation of the 

daily mean flow from the previous 2 days is used to estimate 

the daily mean flow on the day the measurement was made. 

This procedure allows the use of base-flow data that otherwise 

would be removed from the analysis. An example of the need 

for this procedure is when a measurement at a partial-record 

station is made at base-flow conditions in the morning and 

precipitation in the afternoon causes the stream at the index 

site to rise. Also, a test is available for base flow at streamflow-gaging stations with very low flows. The absolute value 

of the change in flow must be less than 0.2 ft3/s from the previous day to the day in which the flow was measured to qualify 

as base flow. At very low flows, a change in stage of less than 

0.01 ft (the precision of the instrumentation) can change the 

flow by greater than 20 percent.

Estimated statistics for a partial-record station are 

computed on the basis of a weighted mean of results from 

MOVE1 correlations typically run with data from three or 

more index sites. If the estimates of flow statistics from 

these correlations vary widely, additional correlations with 

nearby gaging stations are run to obtain better estimates. 

Results from as few as one correlation could be used at a 

partial-record station located on the same stream in close 

proximity to a gaging station. In that case, correlations with 

other gaging stations in the vicinity would not considerably 

improve the estimate. The estimates from each correlation 

are weighted together inversely, on the basis of the standard 

error of estimate. Correlations with a lower standard error 

have a stronger effect on the estimate. This standard error of 

estimate is a function of the scatter of the data about the line, 

the number of measurements used to develop the line, how 

far the relation is extended from the measurements to predict 

statistics at the partial-record station, and the standard error of 

the index-gage statistics (Telis, 1991). 

A table of the estimated statistics and plots of the data 

is generated for each MOVE1 correlation. Examples of the 

outputs from a correlation between an index site—South 

Branch Raritan River at High Bridge (01396500) (fig. 1)—

and a partial-record station— South Branch Raritan River at 

Middle Valley (01396280) (fig. 1)—are shown in figures 8 

and 9. The statistics estimated from each correlation and a 

weighted mean of all the estimates based on the standard error 

are summarized in a table, as shown in figure 10, for each 

partial-record station.

The plots shown in figure 9 are used to assure the quality 

of the data and to look for trends in the relation between daily 

mean flows at the index site and instantaneous measurements 

of base flow at the low-flow sites. Outliers are identified by 

analyzing percent difference between actual and predicted 

values, as well as visual analysis of plots (fig. 9). When 

outliers are identified, the discharge measurement form on 

which the velocities, depths, and areas of measured flow were 

recorded is examined for mistakes. The flow on the measurement form is compared to the flow stored in the database, 

velocities on the form are compared with the rating table for 

the meter used, and measurement computations are checked. 

The residuals computed from the MOVE1 correlation program 

are defined as the difference between the predicted flow from 

the MOVE1 correlation equation and the measured flow at the 

partial-record station (predicted minus measured). The residuals are presented in plots as the percent difference between the 

MOVE1 predicted flow and the measured flow. The percent 

differences are plotted with index station flow, time, and season to examine changes in these relations.

Methods of Study 13
Figure 8. Example of results generated by the MOVE1 correlation program listing statistics at an index site and the estimated statistics at a partialrecord station in New Jersey. (Time sampling error, t-year recurrence interval for a continuous-record gaging station in percent; %, percent; stnd error of 

prediction, standard error of prediction is a measure of the fit of the correlation of discharge data for two stations; stnd error of estimate, standard error of estimate is function of the scatter of the data about the line, the number of measurements used to develop the line, how far the relation is extended from the measurements to predict statistics at the partial-record station, and the standard error of the index-gage statistics; correlation coeff, correlation coefficient is a measure of strength of the linear relation between two variables with values ranging from 0 to 1, and 1 is the strongest relation; index station and low-flow statistics are recorded in cubic feet per second.)

14  Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003 ESTIMATED STREAMFLOW STATISTICS CORRELATION COEFF = 0.989 FINAL EQUATION IS QP = (0.56274)QI(1.0428) LOW-FLOW SITE MEASURED FLOW AT 01396280 SOUTH BRANCH RARITAN RIVER AT MIDDLE VALLEY NJ INDEX STATION DAILY FLOW AT 01396500 SOUTH BRANCH RARITAN RIVER NEAR HIGH BRIDGE NJ FOR THE 7-DAY 10-YEAR LOW FLOW: STND ERROR OF PREDICTION FOR LOW-FLOW SITE = 11.67% STND ERROR OF ESTIMATE FOR LOW-FLOW SITE = 42.82% TIME SAMPLING ERROR FOR INDEX GAGE = 39.12% INDEX STATION STATISTICS FOR SITE 01396500 1-DAY 10-YEAR (ANNUAL) LOW-FLOW = 20.230 7-DAY 10-YEAR (ANNUAL) LOW-FLOW = 22.030 7-DAY 10-YEAR (NOV.-APR.) LOW-FLOW = 29.390 30-DAY 10-YEAR (ANNUAL) LOW-FLOW = 24.720 30-DAY 10-YEAR (NOV.-APR.) LOW-FLOW = 38.590 30-DAY 5-YEAR (ANNUAL) LOW-FLOW = 28.770 30-DAY 5-YEAR (NOV.-APR.) LOW-FLOW = 47.602 FLOW DURATIONS FOR INDEX STATION ARE: 25% FLOW DURATION = 148.700 50% FLOW DURATION = 87.020 75% FLOW DURATION = 51.870 25%/75% FLOW DURATION RATIO = 2.867 INDEX STATION MEAN ANNUAL DISCHARGE = 122.600 INDEX STATION HARMONIC MEAN = 69.870 YEARS OF DAILY DISCHARGE RECORD = 72

TREND TEST RESULTS: KENDALLS TAU = 0.3793 PROBABILITY = 0.0039 

ESTIMATED LOW-FLOW STATISTICS FOR LOW-FLOW SITE 013962801-DAY 10-YEAR (ANNUAL) LOW-FLOW PREDICTION = 12.9477-DAY 10-YEAR (ANNUAL) LOW-FLOW PREDICTION = 14.1517-DAY 10-YEAR (NOV.-APR.) LOW-FLOW PREDICTION = 19.113 30-DAY 10-YEAR (ANNUAL) LOW-FLOW PREDICTION = 15.95730-DAY 10-YEAR (NOV.-APR.) LOW-FLOW PREDICTION = 25.39030-DAY 5-YEAR (ANNUAL) LOW-FLOW PREDICTION = 18.691 30-DAY 5-YEAR (NOV.-APR.) LOW-FLOW PREDICTION = 31.601 PREDICTED FLOW DURATIONS FOR LOW-FLOW SITE ARE:25% FLOW DURATION = 103.647 50% FLOW DURATION = 59.28075% FLOW DURATION = 34.56225% / 75% FLOW DURATION RATIO = 2.999 PREDICTED MEAN ANNUAL DISCHARGE = 84.752PREDICTED HARMONIC MEAN = 47.152NUMBER OF DISCHARGE MEASUREMENTS USED = 29
Figure 9. Example of plots generated by the Maintenance of Variance Extension Type 1 (MOVE1) correlation analysis program 

to evaluate the relation between base-flow measurements at a low-flow partial-record station and daily mean flow at an index 

site in New Jersey. (Q, flow in cubic feet per second; residuals, difference between predicted values and the actual values for 

the dependent variable; MOVE1 Q, relation between daily mean flow at t streamflow-gaging station and instantaneous flow at 

the partial-record site; OLS, ordinary least squares; 7Q10, 7-day 10-year low flow.)

Methods of Study 15
Figure 10. Example of summary statistics estimated by use of the Maintenance of Variance Extension Type 1 (MOVE1) correlation program for South Branch 

Raritan River at Middle Valley, N.J. (site 01396280), and the weighted mean of the estimates based on the standard error of estimation. (sta, station number; Wgtd, weighted; “.”, no value calculated; index DA, index station drainage area in square miles; partial DA, partial-record station drainage area in square miles; Q1.10, 1-day 10-year flow; Q7.10, 7-day 10-year flow; Q710.DA, 7-day 10-year flow per square mile; WIN.Q710, winter 7-day 10-year flow; Q30.5, 30-day 5-year flow; WIN.Q305, winter 30-day 5-year flow; QAVG, mean daily flow; HAR MEAN, harmonic mean; DURA.25, 25-percent flow duration; Percent Pred, standard error of prediction; percent gage, time sampling error; percent est, standard error of estimate; correlation coefficient; No meas, number of base-flow measurements; begin year, first year of base-flow measurements; end year, last year of base-flow measurements; yrs dv, number of years of daily flow at index site; power, slope of the line; constant, intercept of line; ken tau, Kendall tau coefficient; ken prob, probability; WRIR, U.S. Geological Survey Water-Resources Investigations Report.)

16  Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
A Kendall Tau trend test is used to examine the residuals ordered from the beginning to the end of the data set. The 

test determines the probability that the null hypothesis of no 

significant trend can be rejected with a low risk of error. A 

p-value equal to 0.05 indicates there is a 95-percent chance 

that a trend is present. For this study, a trend test with a 

p-value of less than or equal to 0.05 is considered a significant result. When a significant trend is detected, the data are 

examined more closely. If the plot of residuals in relation to 

time shows a noticeable shift in residuals at a particular point 

in time, the data after the shift may be examined separately. 

The correlation between index site 01396500 and lowflow station 01396280 (fig. 1) is an example of a decrease in 

residuals over time or an increase in the percent difference of 

the predicted low flow from the measured flow. The Kendall 

Tau value (0.3793) and probability (0.0039) at the bottom of 

figure 8 show a significant positive trend in residuals. The plot 

of residuals in relation to time (fig. 9) shows the predicted 

flow from the equation as a percent difference from the actual 

measured flow. The plot shows a change starting in 1983. Ten 

of the 12 measurements after 1982 have a positive difference; 

flow predicted by the MOVE1 correlation equation is greater 

than the measured flow. Fourteen of the 17 measurements 

made before 1983 have a negative difference: flow predicted 

by the MOVE1 correlation equation is less than the measured 

flow. A correlation using only measurements made after 1982 

would estimate lower streamflow statistics from data more 

indicative of recent hydrologic conditions. 

The MOVE1 line does not fit the data at 9 partial-record 

stations. At these sites, a graphically determined best-fit line is 

used to determine the relation between the daily mean flows at 

the index gaging station and the measured flows at the partialrecord station. The MOVE1 program cannot be run directly 

on zero flow data because the logarithm of zero is undefined. 

A constant of 0.01 ft3/s is added to adjust the flow at both 

index sites and low-flow sites to allow a logarithm to be taken. 

This constant can be adjusted to best fit the distribution of the 

nonzero flow data. The constant then is subtracted from the 

predicted statistics when appropriate. Another approach is to 

determine the frequency of flow at a nearby gaging station on 

the day the observed flow was zero at the low-flow site. For 

instance, if the flow at the gaging station is equal to the 7-day 

2-year low flow (MA7CD2), it is estimated that the MA7CD2 

flow and less frequently occurring non-exceedance frequencies (for example, 7-day 10-year low flow) at the low-flow site 

are zero.

Streamflow Characteristics

Flow Statistics

Streamflow at gaging stations is affected by changes in 

climate; natural factors such as river processes, sedimentation, 

and beaver dams; water-diversion trends, wastewater-discharge 

trends, and human activities. Streamflow at some gaging stations has changed over time as a result. Gaging stations with 

long periods of record reflect more of the inherent long-term 

variability of streamflow. Therefore, streamflow statistics 

are evaluated on the basis of the length of record and on the 

climatic conditions during the period of record to account for 

those changes.

Streamflow statistics were computed at 111 gaging 

stations with 20 or more years of continuous record in New 

Jersey and at gaging stations in surrounding States in close 

proximity to New Jersey. Daily mean streamflow data through 

water year 2001 were used for the computations at the continuous-record streamflow-gaging stations. The characteristics 

presented in a table of summary statistics for the long-term 

continuous-record stations are minimum, maximum, and 

daily mean streamflow; harmonic mean flow; 1-,7-, and 30-

day minimum average low flow with 2-, 5-, 10-, and 20-year 

recurrence intervals; 1-,7-, and 30-day maximum average high 

flow with 2-, 5-, 10-, and 25-year recurrence intervals; and 1-, 

2-, 5-, 10-, 20-, 25-, 30-, 40-, 50-, 60-, 70-, 75-, 80-, 85-, 90-, 

95-, 99-percent daily duration flows. The flow frequencies 

and flow durations are presented for both annual and winter 

(November through April) periods. The annual period used 

for frequency analysis is based on the climatic year (April 1 

to March 31) for low-flow frequency analysis and the water 

year for high-flow frequency analysis. The annual 1-, 7-, and 

30-day low- and high-flow data sets were tested for trends. 

Monthly, seasonal, and annual precipitation data for selected 

long-term meteorological stations (fig. 2) also were tested for 

trends to analyze the effect of climate on streamflow trends. 

The ratios of flow duration and high-flow to low-flow frequency, the ratio of instantaneous peak flow to 3-day mean 

flow, and the coefficient of variation were used to define 

streamflow variability.

Streamflow statistics were estimated for 500 partialrecord stations including 66 gaging stations with less than 

20 years of record. MOVE1 correlation analysis was used to 

relate instantaneous base-flow measurements at the partialrecord stations to daily mean discharges at gaging stations. 

The characteristics presented for partial-record stations are 

daily mean flow; harmonic mean flow; and 1-, 7-, and 30-day 

minimum average low-flow with a 10-year recurrence interval 

for the annual and winter periods. 

Streamflow statistics are presented in tables for each continuous-record streamflow-gaging station and partial-record 

station. The tables are available at the USGS World Wide 

Web site http://pubs.water.usgs.gov/sir20055105/. The tables 

are updated as new data become available. An example of the 

presentation of summary statistics for South Branch Raritan 

River near High Bridge, N.J. (01396500), a continuous-record 

streamflow-gaging station with more than 20 years of record is 

shown in figure 11. Section A begins with the basin name from 

the NJDEP list of 20 Watershed Management Areas (WMA’s) 

in the State. The WMA is followed by the USGS station identification number. Each continuous-record streamflow-gaging 

station is assigned a unique identification number, which 

Streamflow Characteristics 17
Figure 11. Example of summary statistics for continuous-record streamflow-gaging stations in New Jersey with 20 or more years 

of continuous streamflow record. (This example represents summaries as they are presented on the World Wide Web site. Identifying letters A, B, C, D, E, and F are used only to facilitate discussion in the text. mi, miles; mi2

; square miles; cfs, cubic feet per second; 

--, no value calculated.)

18 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003

Period of 

record

1919-2001

676 513 338 242 169 149 133 107 87 71 58 52 46 36 29 24 22

732 574 397 283 205 183 166 140 118 100 83 75 68 51 40 32 28

Duration of daily flow

Streamflow (cfs) that was exceeded for the indicated percentage of time

Annual

Winter

F

1 2 5 10 20 25 30 40 50 60 70 75 80 90 95 98 99

1920-2001 2 5 10 20

31 18

33 19

30 38 29 25 22

43 23

50 25

30 70 48 39 32

1919-2001 2 5 10 25

1 1,070 1,540 1,890 2,360

7 473 641 752 891

30 278 362 415 479

1 905 -- 1,720 2,250

7 408 578 703 876

30 259 347 406 481

Magnitude and frequency of lowflow 

for indicated periods

Annual minimum streamflow (cfs)

for indicated recurrence interval 

in years

Period

of

record

Magnitude and frequency of high flow

for indicated periods

Annual maximum streamflow (cfs)

for indicated recurrence interval

in years

Number of 

consecutive

days

Period

of

record

Number of 

consecutive

days

Annual

(Apr.-Mar.)

Winter

(Nov.-Apr.)

Annual

(Oct.-Sept.)

Winter

(Nov.-Apr.)

D E

29

20

22

27

1 24

7 26

1 32

7 35

1919-2001 123 13 3,340 70

Period of record:

Streamflow characteristics (cfs)

Mean annual flow Minimum daily flow Maximum daily flow Harmonic mean flow

C

65.3 mi2

1919-2001

Latitude 40° 40' 40", Longitude 74° 52' 45", Hunterdon County, Hydrologic Unit 02030105, on 

left bank 1.0 mi northeast of High Bridge, and 4.4 mi upstream from Spruce Run.

Continuous-record gaging station

Period of record:

Station type:

Location:

Drainage area:

B

NORTH AND SOUTH BRANCH RARITAN BASIN

01396500 South Branch Raritan River near High Bridge, NJ

A
follows the “downstream order” system. The gaging station 

name is included in this table as well as the WMA name.

Section B is a description of the gaging station, including the location. The drainage area of the gaging station is 

recorded in square miles (mi2). The station type is continuous-record gaging station. A continuous-record gaging station 

records streamflow data at regular intervals throughout the 

day. The data, usually collected at 15-minute intervals, are 

used to compute daily mean-flow values. Gaging stations with 

less than 20 years of record were analyzed as partial-record 

stations and are labeled as such. The period of record is given 

in water years starting with the first complete year of record at 

that station.

Section C displays streamflow characteristics. In these 

summary statistics, cubic feet per second is abbreviated as 

cfs. This table contains five basic statistics for streamflow at 

the gaging station. The period of record for the station is in 

water years. Mean annual flow is the arithmetic mean of the 

individual daily mean discharges for the designated period. 

The minimum flow value is the minimum instantaneous 

discharge for the period of record. The maximum flow value 

is the maximum instantaneous discharge for the period of 

record. The value for harmonic mean flow is a statistic used as 

a design flow applied to water-quality criteria for the protection of human health under lifetime exposure to toxic contaminants (Rossman, 1990). Some gaging stations may have a split 

period of record as a result of the augmentation of regulation 

or the withdrawal of regulation.

Section D provides the magnitude and frequency of 

low flow for indicated periods separated into two categories, 

annual and winter. The period of record for annual low-flow 

data follows the climatic year, April through March, where the 

numeric year corresponds with January through March. Winter 

data are collected from November through April. The annual 

minimum streamflow for the indicated recurrence interval in 

years is listed in this table. For low-flow statistics, the recurrence interval is 2, 5, 10, and 20 years.

Section E presents the magnitude and frequency of high 

flow for indicated periods separated into annual and winter. 

The period of record for high-flow data follows the water year, 

October through September. Winter data are collected from 

November through April. This table lists the annual maximum 

streamflow for the indicated recurrence interval in years. For 

high-flow statistics, the recurrence interval is 2, 5, 10, and 

25 years.

Section F presents the duration of daily flow, which is 

the output from the flow-duration curve. The flow-duration 

curve is a cumulative-frequency curve that shows the percentage of time that specified discharges are exceeded. The curve 

is based on the total period of record (water year), but the 

chronological sequence of flows is omitted from consideration 

in the preparation of the curve. Therefore, it is impossible 

to tell from the flow-duration curve alone whether varying 

periods of low flow all occurred during one drought period 

or were scattered over a number of years. The flow-duration 

curve is, however, useful for studying the flow characteristics 

of a stream over its entire range of discharge (Gillespie and 

Schopp, 1982). 

An example of the presentation of estimated statistics for 

South Branch Raritan River at Middle Valley, N.J. (01396280), 

a low-flow partial-record station, is shown in figure 12. Instantaneous base-flow measurements are correlated to daily 

mean flow at gaging stations in basins with similar hydrologic 

conditions. The low-flow statistics were estimated by using the 

Maintenance of Variance Extension Type 1 (MOVE1) method 

of correlation analysis (Hirsch, 1982) when ample base-flow 

measurements were available. Section A identifies of the station name and USGS station identification number, a unique 

identification number that follows the “downstream order” 

system. The WMA name from the NJDEP list of 20 WMA in 

the State also is displayed.

Section B is a description of the partial-record station, 

including the location. The drainage area of the partial-record 

station is recorded in square miles (mi2). The station type is 

low-flow partial-record station (partial-record station), or gaging station analyzed as partial-record station. A partial-record 

station is a site where discrete measurements are obtained 

over a period of time without continuous data being recorded 

or computed (Reed and others, 2003). The period of record 

is given in water years. Remarks identify stations used for 

the statistical correlations and the rating given to the subject 

station for the confidence of the correlations. A rating of good, 

fair, or poor is assigned to the estimates for each partial-record 

site. A weighted mean of the individual standard errors of 

estimate for each correlation is used to rate the estimated 

statistics. A frequency distribution of all the weighted mean 

standard errors is used as a guide for rating the estimates for 

each site. All sites with weighted mean errors less than the 

50th percentile are rated good. Sites with weighted mean errors 

from the 50th to the 75th percentile are rated fair, and sites with 

errors greater than the 75th percentile are rated poor. Ratings 

of good, fair, and poor correspond to the standard errors of 

prediction of less than 45 percent, 45 percent to 143 percent, 

and greater than 143 percent, respectively. 

Section C presents streamflow characteristics. In these 

summary statistics, cubic feet per second is abbreviated as cfs. 

Three basic statistics for a partial-record station are given in 

this table. The period of record for these statistics is in water 

years and is the period of record of base-flow measurements 

for that station. Mean annual flow is the arithmetic mean of 

the individual daily mean discharges for the designated period. 

The value for harmonic mean flow is a statistic used as a 

design flow applied to water-quality criteria for the protection 

of human health under lifetime exposure to toxic contaminates 

(Rossman, 1990). 

Section D is the magnitude and frequency of low flow 

for indicated periods separated into two categories, annual 

and winter. The period of record for low-flow data follows the 

climatic year, April through March. Winter data are collected 

from November through April. The annual minimum streamflow for a 10-year recurrence interval is listed in this table.

Streamflow Characteristics 19
Figure 12. Example of summary statistics for low-flow partial-record stations in New Jersey. (This example represents summaries as they are presented on the World Wide Web site. Identifying letters A, B, C, and D are used only to facilitate discussion in 

the text. mi, miles; mi2; square miles; cfs, cubic feet per second.)

20 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003

1963-1999

Annual

30 15

30 27

Magnitude and frequency of low flow for indicated periods

Period

of

record

Number of

consecutive

days

Annual minimum

streamflow (cfs) for a 10-

year recurrence interval

(Apr.-Mar.)

Winter

(Nov.-Apr.)

D

1 12

7 13

1 18

7 20

Period of record

1963-1999 82 47

Estimated streamflow characteristics (cfs)

Mean annual flow Harmonic mean flow

C

47.7 mi2

1963-1999

Remarks:

Low-flow partial-record station

Latitude 40° 45' 40", Longitude 74° 49' 17", Morris County, Hydrologic Unit 02030105, at bridge in 

Middle Valley, 6.9 mi downstream from Drakes Brook.

Low-flow frequency estimates are based on correlations with gaging stations 01396500, 01398500, 

and 01399500. The correlations are considered good. 

Location:

Drainage area:

Station type:

Period of record:

B

NORTH AND SOUTH BRANCH RARITAN BASIN

01396280 South Branch Raritan River at Middle Valley, NJ

A
The standard error of estimate computed from the 

standard error of prediction of the MOVE1 line, and the 

error associated with statistics computed for the index sites, 

were used as measures of accuracy for estimates of summary 

statistics at the partial-record stations. 

Harmonic mean flow was computed for all the continuous-record streamflow-gaging stations with 10 or more years 

of record and estimated for all partial-record stations. The 

statistic was computed for two separate periods of record at 

20 gaging stations with 20 or more years for each separate 

period of record with a change in flow regulation at a given 

point in time. Harmonic mean flow for gaging stations ranged 

from 6,347 ft3/s at Delaware River at Trenton, N.J. (01463500) 

(fig. 2) to 0.17 ft3/s at Back Brook Tributary near Ringoes, N.J. 

(01398045) (fig. 1). 

Harmonic mean flows at gaging stations were compared 

to statistics of flow duration and low-flow frequency by evaluating the percent differences at each site and by using ordinary 

least squares regression. This analysis was done to investigate 

other flow statistics that could be used as alternatives to the 

harmonic mean flow. Harmonic mean flow cannot be transferred accurately from one site on a stream to another site. 

The proportional adjustment used for zero flows is another 

limitation of using harmonic mean flow as a design-flow criterion. The adjustment was found to yield illogical results when 

low-flow values of zero or close to zero were changed slightly 

(Martin and Ruhl, 1993).

Linear relations between harmonic mean flow and 50-, 

60-, 70-, 75-, 80-, 90-, 95-percent flow durations and 7-

day 10-year and 7-day 2-year low flows were evaluated for 

comparability. All the relations with flow durations between 

60- and 90-percent had r2 values greater than 0.97, when all 

gaging stations for all periods of record were analyzed. The 

relations with low-flow frequency statistics resulted in lower 

r2 values. 

Harmonic mean flows from individual gaging stations 

and from groups of gaging stations in close proximity 

geographically and(or) hydrologically were closest to flows 

ranging from 60- to 90-percent flow duration. Statistically 

the 75-percent flow duration is most closely associated with 

harmonic mean flow when evaluating all the gaging stations 

analyzed in this study (fig. 13). The 70-and 75-percent 

flow durations are closest to the harmonic mean flow. The 

harmonic mean averages 12 percent higher than the 75-percent 

flow duration and 2.5 percent less than the 70-percent flow 

duration. Differences at individual gaging stations range from 

54 percent higher to 88 percent lower than the 75-percent 

flow and from 32 percent higher to 89 percent lower than the 

70-percent flow. The regression analyses yield similar results; 

r

2

 values were 0.999 and 0.997 when using untransformed 

values and 0.969 and 0.972 when using log-transformed 

values. The root mean square error was 61 percent for the 

regression with 70-percent flow duration and 38 percent for 

the regression with 75-percent flow duration. The 75-percent 

flow duration is considered to be the best alternative to the 

harmonic mean flow when making comparisons on a statewide 

basis. These statistics vary by 40 percent or more for only a 

few gaging stations on highly regulated streams and a few 

gaging stations on streams in the Piedmont Physiographic 

Province with drainage areas less than 10 mi2.

Harmonic mean flow was less than the 50-percent 

flow duration at all gaging stations for all periods of record 

analyzed. The harmonic mean flow was greater than the 

90-percent flow duration at all gaging stations except two on 

the highly regulated Delaware & Raritan Canal and Lawrence 

Brook (fig. 1). Harmonic mean flow was greater than the 

80-percent flow duration at all gaging stations except those 

with reservoir regulation and most gaging stations draining 

areas less than 10 mi2 in the Piedmont Physiographic Province. 

Harmonic mean flow was greater than the 75-percent flow and 

the 70-percent flow for more than 75 percent and 35 percent of 

the gaging station periods of record analyzed, respectively.

The harmonic mean flow was within 10 percent of the 

60-percent flow duration at most gaging stations without 

substantial regulation in the Coastal Plain. At most gaging stations, the two statistics agreed within 5 percent. At four gaging 

stations in the outer Coastal Plain along the Atlantic Ocean, 

however, the harmonic mean flow was more than 30 percent 

lower than the 60-percent flow duration. The harmonic mean 

flow at these sites was within 10-percent of the 70-percent 

flow duration. 

The harmonic mean flow was also within 10 percent of 

the 60-percent flow duration at unregulated gaging stations 

on the Lamington River, Mulhockaway Creek, Musconetcong 

River, Pequest River, South Branch Raritan River, Spruce 

Run, and Whippany River (fig. 1) in the New England 

Physiographic Province. Also, harmonic mean flows at 

gaging stations on the Elizabeth River, Second River, and 

Third River (fig. 1) in the Piedmont Physiographic Province 

in northeastern New Jersey were within 10 percent of the 

60-percent flow duration. At regulated gaging stations on the 

Assunpink Creek (fig. 2), Delaware River, Hackensack River, 

Pompton River, Raritan River, Saddle River, and South 

Branch Raritan River (fig. 1) harmonic mean flows were 

within 13 percent of the 60-percent flow. Harmonic mean 

flows were less than the 60-percent flow duration at most 

unregulated gaging stations in the Piedmont and Valley and 

Ridge Physiographic Provinces. 

Harmonic mean flows matched the 70-percent flow duration to within 10 percent at all four unregulated gaging stations 

on the Flat Brook, Paulins Kill, Pequest River, and Wallkill 

River (fig. 1) in the Valley and Ridge Physiographic Province. 

There are no clear similarities in physiographic province or 

flow regulation at the remaining gaging stations where the harmonic mean flows were closest to the 70-, 75-, or 80-percent 

flow durations. The gaging stations in each group are located 

across different regions of the State and on streams with and 

without regulation. 

The harmonic mean flow was closest to the 90-percent 

flow at seven gaging stations in the Piedmont Physiographic 

Province. Four of the gaging stations monitor unregulated 

flow; three of these gaging stations measure flow draining 

Streamflow Characteristics 21
75-PERCENT FLOW DURATION, IN CUBIC FEET PER SECOND

7,000

6,000

5,000

4,000

3,000

2,000

1,000

0

0 1,000 2,000 3,000 4,000 5,000 6,000 7,000

HARMONIC MEAN FLOW, IN CUBIC FEET PER SECOND

Least-squares regression line

95-percent confidence limits

Adjusted r2 = 0.999

Root mean square error = 38.4

N = 158

Figure 13. Relation of harmonic mean flow to 75-percent flow duration for 158 periods of record at 138 gaging stations with 

greater than 10 years of record on selected streams in New Jersey. (r2, correlation coefficient; N, number of records.)

22 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
from less than 2.5 mi2

, and one gaging station measures flow 

draining from 7 mi2. The other three gaging stations in the 

Piedmont Physiographic Province are on regulated streams.

Streamflow Variability

Streamflow variability as defined by the ratios of 

25-percent/75-percent and 10-percent/90-percent flow durations, and the ratios of 1-day 2-year high flow/1-day 2-year 

low flow and 1-day 20-year high flow /1-day 20-year low flow 

was analyzed for all gaging stations with 10 or more years 

of record. Ratios at gaging stations in the Coastal Plain were 

compared with ratios at gaging stations located outside of the 

Coastal Plain. Comparisons also were made between gaging 

stations grouped by land-use category in the Coastal Plain and 

other physiographic provinces. Gaging stations affected by 

substantial regulation were removed from the groups before 

making comparisons. 

Streamflow variability was substantially greater among 

the group of gaging stations located outside the Coastal Plain 

than the group of gaging stations located in the Coastal Plain. 

The median value of the 25-percent/75-percent ratio was 4.12 

for the 38 analyzed stations outside the Coastal Plain and 2.16 

for the 20 analyzed stations in the Coastal Plain. All four ratios 

were substantially higher for the group of gaging stations 

outside the Coastal Plain than for the group of gaging stations 

inside the Coastal Plain. 

Streamflow variability was compared between gaging 

stations in different land-use categories. Gaging stations with 

greater than 30 percent of their drainage area categorized 

as developed land were compared with gaging stations 

with 70 percent or more of their land area categorized as 

undeveloped. Ratios of 1-day 2-year high flow/1-day 2-year 

low flow and 1-day 20-year high flow /1-day 20-year low 

flow were substantially higher at gaging stations draining 

developed basins than at gaging stations draining undeveloped 

basins in the Coastal Plain, indicating more variability in 

flow. No considerable differences in ratios of flow duration 

were observed between gaging stations in developed and 

undeveloped basins in the Coastal Plain. No considerable 

differences in streamflow variability were observed between 

the groups of gaging stations in developed and undeveloped 

basins located outside the Coastal Plain. 

Developed sites were categorized as urban, agricultural, 

or mixed. Gaging stations with greater than 16-percent agricultural land were categorized as agricultural sites, and those 

with greater than 40-percent urban land use were categorized 

as urban sites. The ratios of high-flow to low-flow frequency 

were considerably different for gaging stations at undeveloped 

sites and both urban and agricultural sites in the Coastal Plain. 

Gaging stations that monitor flows from agricultural and urban 

areas had substantially higher streamflow variability than gaging stations with flows from undeveloped areas.

The coefficient of variation is another indicator of streamflow variability used to quantify the variability of daily mean 

streamflow. Streams with the lowest coefficient of variation 

have the least variability in daily mean streamflow. The coefficient of variation was highest (from 207 to 405) for small 

unregulated streams in the southern area of the Piedmont 

Physiographic Province and lowest (from 41 to 93) for streams 

in the Pinelands area (fig. 5) of the Coastal Plain. The only 

gaging station with a coefficient of variation lower than the 

gaging stations in the Pinelands region was the Delaware and 

Raritan Canal at Port Mercer (01460440) (fig. 2), which had a 

value of 16.7. The flow in the Delaware and Raritan Canal is 

regulated at a fairly constant rate for water-supply purposes. 

Streams in the Pinelands region have lower variability in daily 

mean flow than streams in other areas of New Jersey because 

a high percentage of total annual streamflow originates from 

ground water. Base flow accounts for 70 to 90 per­cent of mean 

annual flow at these gaging stations (CH2M Hill and others, 

1992). Base flow accounts for approximately 30 to 50 percent 

of mean annual flow at the gaging stations with the highest 

coefficients of variation.

Gaging stations on the Lamington River, Pequest River, 

and Musconetcong River (fig. 1) are the only sites, other than 

those in the Coastal Plain, with coefficients of variation less 

than 100. Base flow in these streams is a higher percentage of 

mean annual flow (78–84 percent) than in most other streams 

in the study area, except those in the Pinelands area (CH2M 

Hill and others, 1992). The only other sites outside the Piedmont Physiographic Province with a coefficient of variation 

greater than 200 are on the Salem River (fig. 2) in an agricultural area of the inner Coastal Plain, on Blue Mine Brook 

(fig. 1) in an undeveloped area of the New England Physiographic Province, and at four gaging stations on regulated 

streams scattered across the study area.

Trends in Streamflow

The goals of the streamflow trend analysis were to determine whether there were trends in specific annual n-day high 

flows and low flows and to provide a general assessment of the 

effects that development in watersheds upstream from streamflow-gaging stations could have on the trend results. A general 

assumption is that increased development in a watershed 

would result in lower streamflows during dry weather and 

higher streamflows during storms. Some of the factors that can 

cause these effects on streamflow are an increase in impervious cover, an increase in water use, an increase in stormwaterdrainage systems, and an increase in wastewater sewers and 

treatment facilities. Development patterns in New Jersey have 

left a few watersheds that have been sparsely developed over 

the past 40 years, and much of this development has occurred 

upstream from the gaging stations used in this analysis.

Trend analysis was done for 138 gaging stations with a 

total of 159 different records. For 20 stations, the period of 

record (length of time that data is collected at a gaging station) was often split into two periods as a result of substantial 

hydrologic changes in the watershed upstream from the 

Streamflow Characteristics 23
station (for example, dams, diversions, wastewater discharges). 

Streamflow data through water year 2001 were used for the 

computations at the continuous-record stations. The Kendall 

Tau trend test was conducted with SWSTAT, a surface-water 

statistics program (Flynn, 1995), to analyze the annual 1-, 7-, 

and 30-day high- and low-flow data sets. The outcomes for 

each record were a Kendall Tau coefficient, a p-value, and a 

slope for each of the annual n-day high- and low-flow periods 

(table 3 and 4 [back of report]), the actual values are listed in 

appendix 3A–B). When the Kendall Tau coefficient is negative, there is a downward trend. When the Tau is positive, there 

is an upward trend. The p-value determines the significance of 

the results. A p-value equal to or less than 0.05 is considered 

a significant result. The results for three categories of gagingstation record—all gaging stations, regulated gaging stations, 

and unregulated gaging stations—for the 1-, 7-, and 30-day 

high- and low-flow are summarized in table 5a. The number 

and percentage of gaging stations with significant upward and 

downward trends are presented for each n-day flow condition 

in table 5b.

A stream is considered regulated if changes in the hydrologic characteristics of the drainage basin (reservoir, large 

sewage-treatment-plant discharge, large surface-water diversions) upstream from the gaging station could have a substantial effect on low flows and in some cases on high flows 

(Robert Schopp, U.S. Geological Survey, written commun., 

2003). The unregulated gaging stations are those with manmade hydrologic changes in the drainage basin upstream from 

the gaging stations that are not considered substantial enough 

to affect low-flow statistics. Although these gaging stations are 

considered to be unregulated for this analysis, there have been 

some hydrologic modifications (ground-water diversions for 

example, wastewater-treatment facilities) over the period of 

record for some of the gaging stations. The designation of gaging stations as regulated or unregulated will be re-evaluated 

for any possible future flow-trend analysis studies performed 

by the USGS.

Trend results indicate upward trends at most sites for the 

annual 1-, 7-, and 30-consecutive-day high flows based on the 

Kendal Tau analysis; but not all results were statistically significant. The significant results for the 1- and 7-day high flows 

for records from all gaging stations indicate most trends were 

upward, but trends for 30-day high flows were almost evenly 

split. Five gaging stations had upward trends and six gaging 

stations had downward trends (table 5b). The percentages of 

all records with significant high-flow trends were 16, 11, and 

7 for the 1-, 7-, and 30-day flows, respectively. The low-flow 

trends were essentially even for all records for each flow 

regime. The significant low-flow trend results for all records 

for all flow regimes were upward trends, though the 7-day 

flow was close to evenly split. The percentages of all records 

with significant low-flow trends were 25, 25, and 19 for the 1-, 

7-, and 30-day periods, respectively. 

Of the total 159 records, 86 records were for regulated 

gaging stations (appendix 1-A). Trend test results indicate an 

upward trend for the 1-, 7-, and 30-day high flows at most regulated gaging stations. Not all results were significant. Of the 

significant results, trends were mostly upward for the 1- and 

7-day high flows, and for the 30-day high flows, four trends 

were downward and three were upward. The percentages of 

regulated gaging stations with significant trends were 19, 

13, and 8 for the 1-, 7-, and 30-day high flows, respectively. 

Most of the low-flow trends for the regulated gaging stations 

were upward, and the significant results represent a relatively 

large percentage of the gaging station records compared with 

the results for the unregulated gaging station records. For the 

1-, 7-, and 30-day low flows, the percentages of regulated 

gaging stations with significant results were 28, 33, and 26, 

respectively. It was expected that the statistics for low flows 

at regulated gaging stations might not be consistent with those 

for the unregulated stations, but it was not expected that most 

of the significant trend results for the low flows tested would 

be upward. An example of a regulated gaging station is Saddle 

River at Lodi (01391500), which has upward low-flow trends 

and upward high-flow trends. One factor that could have 

affected these trends is the addition of a major sewage-treatment plant upstream from the gaging station. Other factors 

that could affect the trend analysis are discussed below.

Seventy-three of the 159 periods of record analyzed are 

for unregulated gaging stations (appendix 1-A). Trend test 

results indicate an upward trend for the 1-, 7-, and 30-day high 

flows at most unregulated gaging stations. The significant 

high-flow trends were mainly upward for the 1- and 7-day 

flows. The significant 30-day flows were evenly split between 

upward and downward trends. The percentages of unregulated 

gaging stations with significant high-flow trends were 14, 

12, and 5 for the 1-, 7-, and 30-day flows, respectively. Trend 

test results indicate a downward trend for the 1-, 7-, and 

30-day low flows at most unregulated gaging stations. Most 

significant results were determined to be downward for the 

7- and 30-day flows, and the 1-day flows were evenly 

split. The percentages of unregulated gaging stations with 

significant low-flow trends were 22, 16, and 12 for the 1-, 

7-, and 30-day, respectively. 

Fourteen gaging stations in the unregulated gaging station 

data set are on streams with little developed land (less than 

15-percent) upstream from the gaging station; the streams are 

considered to be natural streams because the areas they drain 

are undeveloped (table 2). Because of the sparse development 

upstream from these sites, changes in streamflow trends at 

these sites would be related more to climate or precipitation 

than to regulation or development. The trends for high flows 

were almost evenly split between upward and downward. Only 

one trend for high flows was significant, and it was an upward 

trend for the 7-day flow. The low-flow trends were mostly 

downward (11 out of 14 gaging stations) with three significant 

downward trends each for the 1-, 7-, and 30-day low flows 

and one significant upward trend result for the 1-day low flow. 

The unregulated gaging stations with greater than 15-percent 

developed land had mostly upward trends for the high flows, 

and the significant results also were mostly upward. Most of 

the low-flow trends were downward, but the significant low24  Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Table 5a. Results of trend tests on records of highest and lowest annual n-day flow for streamflow-gaging 

stations in New Jersey. 

[n, number of streamflow-gaging records; +, positive Kendall Tau value; -, negative Kendall Tau value; significant = p-value 

<0.05]

Number of records

Trend tests

1-Day 7-Day 30-Day

Trend Percent

(n) Trend Percent(n) Trend Percent(n)

Annual high-flow trends

All gaging station records n = 159 + 57 (90) + 57 (91) + 55 (88)

Regulated gaging station records n = 86 + 62 (53) + 57 (49) + 55 (47)

Unregulated gaging station records n = 73 + 58 (42) + 58 (42) + 56 (41)

Annual low-flow trends

All gaging station records n = 159 + 56 (89) - 51 (81) + 50 (80)

Regulated gaging station records n = 86 + 63 (54) + 59 (51) + 59 (51)

Unregulated gaging station records n = 73 - 52 (38) - 63 (46) - 60 (44)

Table 5b. Significant results of trend tests on records of highest and lowest annual n-day flow for streamflow-gaging stations in 

New Jersey.

[n, number of streamflow gaging records; +, positive Kendall Tau value; -, negative Kendall Tau value; significant = p-value <0.05]

Trend tests

1-Day, significant 7-Day, significant 30-Day, significant

Number of 

stations

Trend Percent

(n)

Number of 

stations

Trend Percent

(n)

Number of 

stations

Trend Percent

(n)

Annual high-flow trends

All gaging stations 26 + 77 (20) 18 + 78 (14) 11 - 55 (6)

Regulated gaging stations 16 + 69 (11) 11 + 73 (8) 7 - 57 (4)

Unregulated gaging stations 10 + 90 (9) 9 + 78 (7) 4 - 50 (2)

Annual low-flow trends

All gaging stations 40 + 68 (27) 40 + 53 (21) 31 + 61 (19)

Regulated gaging stations 24 + 79 (19) 28 + 61 (17) 22 + 68 (15)

Unregulated gaging stations 16 + 50 (8) 12 - 67 (8) 9 - 56 (5)

Streamflow Characteristics 25
flow trends were mixed. Of the 1-day low flow trends, seven 

were upward and five were downward. Of the 30-day low flow 

trends, four were upward and two downward, and of the 7-day 

low-flow trends, four were upward and five were downward.

The overall results of the trends analysis show that highflow trends for the regulated and unregulated gaging stations 

were upward. The gaging stations with significant trend results 

also showed an upward trend for the regulated and unregulated 

gaging stations for the 1- and 7-day flows, whereas the 30-day 

flows were approximately evenly split between upward and 

downward trends. The trend results for the unregulated gaging 

stations at sties identified as undeveloped did not show highflow trends. The high-flow trend results indicate a relation 

between upward high-flow trends and stream regulation and 

development. An increase in development leads to increased 

impervious cover and, therefore, increased high and low flows.

The low-flow trend results for regulated gaging stations 

indicate that most of the gaging stations had an upward trend, 

and the significant trend results indicate that most of the gaging stations had upward trends. The results indicate a relation 

between regulated gaging stations and upward trends. Most of 

the low-flow trends for the unregulated gaging stations were 

downward, and most of the significant results were downward 

trends for the 7- and 30-day low flows. Significant results were 

evenly split for the 1-day low flows. In addition, the results 

might indicate a relation between downward flow trends and 

unregulated gaging stations and development, but the trend 

results for the undeveloped sites also were downward. This 

downward trend could indicate that there are other variables 

affecting the trends for the unregulated gaging stations. The 

relation of development to low-flow trends does not appear to 

be as strong as development to high-flow trends. The winter 

trend results for both high and low flows for each gaging station, in general, were similar to the trend results based on the 

annual data.

The trends results for two streamflow-gaging stations 

representing an undeveloped site and a drainage area 

undergoing development were compared to better assess the 

overall results of the trends analysis. Because both gaging 

stations are located in the same climate division, it was 

assumed that any trends in rainfall would have a similar effect 

on each gaging station. The two gaging stations are Flat Brook 

near Flatbrookville (01440000) (fig. 1), which is considered 

to represent an undeveloped, unregulated gaging station in 

northern New Jersey, and Rockaway River above Reservoir 

at Boonton (01380500) (fig. 1) in northern New Jersey, 

which is considered in the trend analysis to be an unregulated 

gaging station with development. Although the watershed is 

only 30-percent developed, the development has occurred 

throughout the period of record. In addition, the volume of 

ground-water withdrawals in the Rockaway River Basin 

has increased considerably over the period of record along 

with the amount of wastewater generated in the basin but 

discharged downstream from the gaging station. The trends 

for these two gaging stations for the 1-day high flow and 

7-day low flow are illustrated in figure 14. The station at Flat 

Brook near Flatbrookville had no significant results for low 

or high flows, although the trend was downward for all low 

flows and upward for all high flows. The station at Rockaway 

River above Reservoir at Boonton had a significant upward 

trend for the 1-day high flow and upward trends for the 7- and 

30-day high flows. The low-flow trend results were downward 

for the 1- and 7-day low flows and upward for the 30-day low 

flow. No significant results were obtained for low-flow trends. 

Although this comparison is limited, it indicates a relation 

between development and high-flow trends and no strong 

relation between development and low-flow trends.

A greater number of significant trend results were 

expected for gaging stations with land-use changes during their period of record than were obtained. A number of 

variables directly affect streamflow and probably affected the 

results of the analysis. Some of these variables are precipitation trends, land-use changes, water-diversion trends, location of withdrawals, wastewater-discharge trends, location of 

discharges, and the period of record for the streamflow-gaging 

station being analyzed. 

Long-term trends in precipitation have an obvious effect 

on streamflow trends, but short-term events can greatly 

affect the analysis. Data for 138 gaging stations with different periods of record (10 to 83 years of record) were used in 

the analysis. As the record used in the analysis gets shorter, 

the effects of a short-term event, such as the drought of the 

1960s (4 to 5 year drought) (Bauersfeld and others, 1988) or 

the sharp increase in annual rainfall in the 1970s (fig. 15), 

could be significant. For example, if a gaging station period of 

record started in 1960 and ended in 1980 (20 years), the record 

would probably show a significant upward trend in low and 

high flows no matter how much development occurred in the 

drainage area. A plot of the 10-year moving average for the 

7-day low flow at 01396500 South Branch Raritan River near 

High Bridge, N.J., is shown in figure 16. A definite downward 

slope during the late 1960s and an upward slope through the 

mid- to late 1970s is seen. 

The drainage basins upstream from some gaging stations 

in New Jersey have had a dramatic increase in population and 

water use over the years of gaging-station record. In some 

areas, a large percentage of the water supply is coming from 

a source outside the basin, and the resultant wastewater is 

discharged upstream from the gaging station. In this situation, the increase in wastewater discharged could counteract 

an increase in impervious cover (decrease in infiltration) and 

result in no trend or an upward trend for low flow, especially 

where the discharge is a large percentage of low flow (Saddle 

River at Lodi, 01391500, fig. 1). In addition, many watersheds 

in New Jersey have changed from agricultural land use to 

suburban land use with an actual increase in forested acreage. 

In the Raritan River Basin, an estimated 13 percent of the land 

use was forested in the early 1900s (Smock, 1897), whereas 

in 1996 forested land use was estimated to be 35 percent of 

the watershed (Reiser and O’Brien, 1998). Use of watershed 

rainfall-runoff model, done for this study, rather than a statistical analysis probably could produce a better evaluation of the 

26  Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
50

40302010

1940 1960 1980

WATER YEAR

01440000 Flat Brook near Flatbrookville NJ 

7-Day Annual Low Flow

FLOW IN CUBIC FEET PER SECOND

2000

Tau = -0.086p-value = 0.271

1940 1960 1980 2000

0

600040002000

Tau = 0.103p-value = 0.184

01440000 Flat Brook near Flatbrookville NJ 1-Day Annual High Flow

1920

WATER YEAR

FLOW IN CUBIC FEET PER SECOND

80604020

Tau = -0.025p-value = 0.780

01380500 Rockaway River above Reservoir at Boonton 

NJ 7-Day Annual Low Flow

1940 1950 1960 1970 1980 1990 2000

WATER YEAR

FLOW IN CUBIC FEET PER SECOND

0

4000300020001000

01380500 Rockaway River above Reservoir

at Boonton NJ 1-Day Annual High Flow

Tau = 0.202p-value = 0.018

FLOW IN CUBIC FEET PER SECOND

1940 1950 1960 1970 1980 1990 2000

WATER YEAR

Figure 14. Kendal Tau trend lines for 1-day high and 7-day low flows at continuous-record streamflow-gaging stations on Flat Brook near Flatbrookville, N.J. (01440000), and Rockaway River above the Reservoir at Boonton, N.J. (01380500).

Streamflow Characteristics 27
Figure 15. Total annual precipitation for New Jersey Climatic Divisions 1 and 2, water years 

1895–2001.

28 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003

1880 1900 1920 1940 1960 1980 2000

20

30

40

50

60

WATER YEAR

TOTAL PRECIPITATION, IN INCHES

Total Annual Precipitation for New Jersey Climatic Division 2 1895-2001 

1880 1900 1920 1940 1960 1980 2000

30

40

50

60

TOTAL PRECIPITATION, IN INCHES

WATER YEAR

Total Annual Precipitation for New Jersey Climatic Division 1 1895-2001
effects of land-use changes on streamflow trends. Even subtle 

land-use changes can affect flow trends. As stated previously, it is expected that suburban sprawl will decrease low 

flows and increase high flows because of greater withdrawals, 

more impervious cover, and larger stormwater systems. Since 

approximately the beginning of the 1980s, there has been a 

large increase in the use of detention/recharge basins to 

control storm runoff in housing developments in New Jersey. 

Such structures tend to modify streamflows and affect streamflow trends. 

Stream regulation in a basin also can affect conditions in 

a watershed to various degrees. Increased wastewater discharges likely result in an upward trend for low and high flows 

as discussed above, whereas water-supply withdrawals likely 

result in a downward trend for low and high flows. Retention 

of water in a reservoir on a stream with a minimum passing 

flow could result in higher low flows but lower high flows by 

modifying peak runoff. The difficulty in analyzing the trend 

results is that many of these changes are occurring at different times and at varying rates in watersheds throughout New 

Jersey, and much of the data (long-term point-source discharge 

data, long-term withdrawal data, land-use data, and long-term 

streamflow data) needed to fully analyze flow trends are difficult to obtain or have not been collected. 

Comparison of Trends in Precipitation 

to Trends in Flow at Undeveloped Sites

Precipitation trends can affect streamflow trends. An 

upward trend in precipitation likely results in an upward trend 

in high and low flows; the reverse likely results with a downward trend in precipitation. The season of the year along with 

an upward or downward precipitation trend may not affect the 

low or high streamflows. If the trend in precipitation is upward 

in winter and spring and downward in summer and fall, the 

result could be an upward trend for high flows but a downward trend for low flows. As presented in the streamflow trend 

analysis, short-term climate events (drought for 2–3 years 

or above average precipitation for 2–3 years) also can affect 

streamflow trends when one or both of these events constitute 

a large percentage of the gaging station record. 

Monthly precipitation records for New Jersey Climate 

Divisions 1 and 2 and for eight individual rain gages in 

New Jersey were retrieved from the National Oceanic and 

Atmospheric Administration National Climatic Data Center 

(National Oceanic and Atmospheric Administration, 2000). 

Average annual precipitation values are given below. The longterm average annual precipitation for 1895 to 2001 in northern 

New Jersey Cli­mate Division 1, which includes the Piedmont, 

New England, and Valley and Ridge Physiographic Provinces 

(fig. 4), is 46.1 in. The average annual precipitation for 1895 

to 2001 in southern New Jersey Climate Division 2, which 

includes the Coastal Plain and part of the Piedmont Physiographic Province (fig. 4), is 44.2 in.

Climate division 

(fig. 4)

Average annual precipitation, 

in inches

1895–2001 1895–1970 1971–2001

1 46.1 44.6 49.8

2 44.2 43.7 45.6

The Wilcoxon rank-sum nonparametric test was used to 

determine whether precipitation totals significantly differed 

from the 1895–1970 to the 1971–2001 periods. Total annual 

precipitation was significantly greater during the 1971–2001 

0

10

20

30

40

50

60

70

80

1910 1920 1930 1940 1950 1960 1970 1980 1990 2000 2010

WATER YEAR

7-Day Low Flow

10-Year Moving

Average

STREAMFLOW, IN CUBIC FEET PER SECOND

Figure 16. Annual 7-day 

low flow from water year 

1919 through 2001 with a 

10-year moving average line 

for the continuous-record 

streamflow-gaging station 

South Branch Raritan River 

near High Bridge, N.J. 

(01396500).

Comparison of Trends in Precipitation to Trends in Flow at Undeveloped Sites 29
period than during the 1895–1970 period in northern New 

Jersey (Climate Division 1). No significant difference was 

observed between the two periods in Climate Division 2. Total 

monthly precipitation also was compared between the two 

periods. The only significant difference found between the 

1895–1970 and the 1971–2001 periods were greater precipitation in May in both Climate Divisions during 1971–2001 than 

during 1895–1970.

A Kendall Tau trend test was performed on the total 

annual (table 6) and total monthly precipitation data for 

Climate Divisions 1 and 2 and for each of the eight individual 

gages. Trend tests also were run on total precipitation during the growing season and during the non-growing season at 

the individual rain gages. Data for the period of precipitation 

that most closely matched the nearby gaging-station record 

were used for trend analysis. Significant upward trends were 

detected for total annual precipitation and total monthly 

precipitation for May and November during 1895–2001 in 

Climate Division 1 in northern New Jersey. The only significant trend in the precipitation data for Climate Division 2 was 

a downward trend in February during 1895–2001. Of the eight 

rain gages, the Wertsville gage (fig. 17) in Climate Division 

1 had the highest number of significant trends. A significant 

increase was observed in annual, growing season, non-growing 

season, and monthly totals from January through March, May, 

and September during 1956–2001. Upward trends for annual 

precipitation were observed for the Boonton gage (fig. 17). 

October precipitation significantly increased during 1938–97 

at the Boonton gage. No trends were observed in precipitation data for the Newton, Long Valley, Ringwood, and Long 

Branch gages. Precipitation in January and May significantly 

increased at the Pemberton gage during 1954–2001. June precipitation significantly decreased at the Indian Mills gage.

Precipitation data were compared to the trend results for 

the gaging stations in undeveloped sites (less than 15 percent 

developed). There are 4 gaging stations at undeveloped sites 

in Climate Division 1 and 10 in Climate Division 2 (table 2). 

Overall, for the undeveloped sites, 11 of 14 gaging stations 

had downward trends for two or more low flows, and 8 of 14 

gaging stations had upward trends for high flows. In Climate 

Division 1, two gaging stations had significant downward 

trends for at least one low flow, and one gaging station had a 

significant upward trend for one high flow. In Climate Division 2, one gaging station had a significant downward trend 

for at least one low flow. Although average rainfall in each 

Climate Division has increased between the period of 1895–

1970 and 1971–2001 and Climate Division 1 had a significant 

upward trend for annual data, results of trend tests indicate 

downward low-flow trends for the undeveloped sites, which is 

contrary to the precipitation results. 

Trend analysis was run on precipitation data for the 

five rain gages in Climate Division 1—Boonton, Ringwood, 

Newton, Wertsville, and Long Valley—and the three in 

Climate Division 2—Indian Mills, Long Branch, and Pemberton—to compare to streamflow trend data for gaging stations 

in undeveloped basins. Results of analysis indicated significant upward trends in precipitation at two of the rain gages, 

Boonton and Wertsville (fig. 4). No significant downward 

trends were determined at any rain gage. Significant downward trend results were determined for the 7- and 30-day low 

flows for Green Pond Brook at Picatinny Arsenal (01379773) 

(fig. 4), which is in the same drainage basin as the Boonton 

rain gage. Significant downward trends were observed for 

the 1-, 7-, and 30-day low flows at Blue Mine Brook near 

Wanaque (01386500) (fig. 4), and a significant upward trend 

was determined for the 7-day high flow. This gaging station is 

near the Ringwood rain gage, which did not have a significant 

precipitation trend. No significant trends were determined for 

Ringwood Creek near Wanaque (01384500) (fig. 4), but low 

flows decreased for each flow regime, and the high flow trend 

increased for the 7- and 30-day flow but decreased for the 

1-day flow. A significant downward trend resulted for the 1-, 

7-, and 30-day low flows at the gaging station at McDonalds 

Branch in Lebanon State Forest (01466500) (fig. 4) in Climate Division 2; no significant annual trends resulted for the 

precipitation gages Pemberton and Indian Mills in the same 

general area. A significant downward trend for June resulted 

for the Indian Mills rain gage, which could indicate the cause 

of the downward low-flow trends at the McDonalds Branch 

streamflow-gaging station.

The results of the comparison of the precipitation trend 

with the trend for streamflow in undeveloped basins, although 

limited, indicate that variables other than precipitation affect 

low flows in the State. Only one undeveloped site had significant upward high-flow trends, and the trends are nearly evenly 

split between upward and downward for other undeveloped 

sites for high flows. A general increase has occurred in average 

precipitation in Climate Division 2, and a significant increase 

has occurred in Climate Division 1. This result indicates that 

high flows from undeveloped, unregulated sites have not been 

affected by the increase in average precipitation and that the 

upward high-flow trends for the regulated and unregulated 

gaging stations are associated with increased development.

Table 6. Results from Kendall Tau trend analysis for total 

annual precipitation at selected sites in New Jersey.

Rain gage Period of 

record

Tau p-value Trend

Boonton 1926–97 0.2074 0.010 Upward

Indian Mills 1926–2001 -.0561 .473 None

Long Branch 1928–2001 .0026 .974 None

Long Valley 1931–2001 .0535 .509 None

Newton 1949–2001 .0639 .500 None

Pemberton 1949–2001 .0464 .624 None

Ringwood 1949–2001 -.0145 .878 None

Wertsville 1957–2001 .3212 .002 Upward

Climatic Division 1 1895–2001 .1469 .025 Upward

Climatic Division 2 1895–2001 .0180 .784 None

30 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
60

504030

Tau = 0.321p = 0.002

TOTAL ANNUAL PRECIPITATION, IN INCHES

(d) Total Annual Precipitation- Wertsville 1957-2001

1960 1970 1980 1990 2000

WATER YEAR

1930 1940 1950 1960 1970 1980 1990

605040

Tau = 0.207p = 0.01

(c) Total Annual Precipitation -Boonton 1926-97

WATER YEAR

TOTAL ANNUAL PRECIPITATION, IN INCHES

555045403530

(b) Total Annual Precipitation for New Jersey Climatic Division 2 1895-2001

Tau = 0.0180p = 0.784

TOTAL ANNUAL PRECIPITATION, IN INCHES

WATER YEAR

1900 1920 1940 1960 1980 2000 1900 1920 1940 1960 1980 2000

60504030

(a) Total Annual Precipitation for New Jersey Climatic Division 1 1895-2001

Tau = 0.147 p = 0.0249

TOTAL ANNUAL PRECIPITATION, IN INCHES

WATER YEAR

Figure 17. Results from Kendall Tau trend analysis of annual precipitation in New Jersey (a) Climatic Divisions 1 and (b) 2 and from rain gages at (c) Boonton and (d) Wertsville, New Jersey.

Comparison of Trends in Precipitation to Trends in Flow at Undeveloped Sites 31
Trends in Peak Ratio at Selected 

Streamflow-Gaging Stations

Peak-ratio trend analysis was run on streamflow data for 

28 gaging stations. These stations were chosen as representative of various levels of development and regulation throughout the State. Many of the gaging stations in regulated and 

unregulated areas have had substantial changes in land use 

and water use over the past 20 to 40 years. All gaging stations 

that were used in this analysis have minimal regulation at high 

flow and are considered appropriate for high-flow analysis. 

The peak ratio is determined from annual peak flow, 

which is the value of the maximum instantaneous streamflow 

occurring in the water year divided by the 3-day mean flow 

for 3 consecutive days, including the days before, during, and 

after the peak. Peak ratio is a measure of the magnitude of 

the rise and fall of a stream over a given period of time. The 

peak ratio can be used as a method to define the flashiness of 

a stream. The higher the value, the greater the flashiness of the 

stream. The peak-ratio trend was determined for selected gaging stations using the Kendall’s Tau test (Helsel and Hirsch, 

2002). The test determines the probability that the null hypothesis of no significant trend can be rejected with a low risk of 

error. A p-value equal to 0.05 indicates there is a 95-percent 

chance that a trend is present. 

Kendall’s Tau trend test was used to analyze whether 

increased development and urbanization of New Jersey basins 

was increasing the variability/flashiness of streams. As presented in the discussion on streamflow trends, there are some 

basins in New Jersey that have not had an appreciable increase 

in suburban sprawl over the last 20 to 30 years. Some of this 

sprawl has resulted in a decrease in forested lands, whereas 

some has resulted in a decrease in farmland. In some areas, 

forested land has increased along with an increase in suburban 

sprawl and a decrease in agricultural land.

The results of the analysis show that six gaging stations 

had significant upward trends (table 7). Five of the six gaging 

stations are located in northern New Jersey in the New England and Piedmont Physiographic Provinces. Three gaging stations had a significant downward trend. Two are located in the 

Atlantic Coastal Plain, and the other one in the New England 

Physiographic Province. The remaining 19 gaging stations 

had no significant peak-ratio trend. These gaging stations are 

distributed fairly evenly throughout the State (fig. 18). 

Land use was determined for areas upstream from the 28 

gaging stations. Results of peak-ratio trends at gaging stations 

are listed in table 7 in descending order of the percentage of 

land considered developed. A total of 17 gaging stations had 

positive Kendal Tau values, indicating a general upward trend, 

whereas 11 had negative Kendal Tau values, indicating downward trends. All six gaging stations with significant upward 

trends have greater than 30-percent developed land use with a 

large percentage of the developed land designated urban land 

use. Three gaging stations had significant downward trends; 

one has greater than 30-percent developed land use, and the 

other two have 21-percent and 17-percent developed land use. 

Gaging stations at three undeveloped sites were included in 

the analysis; no significant trends were observed at these sites. 

Although the increase in average precipitation and the upward 

precipitation trend in Climate Division 1 could be the cause 

of the upward trends in peak ratio, the peak-ratio trend results 

indicate that there is a relation between an increase in peak 

ratio and developed land use.

Estimates of Low-Flow Statistics at 

Ungaged Sites

The USGS receives many requests for low-flow statistics 

for stream sites that lack streamflow data, for example, points 

upstream from the outfall of permitted point-source discharges 

and surface-water intakes. The statistics are requested by Federal, State, and local agencies and by private consultants. The 

New Jersey Water Science Center has developed procedures 

for estimating low-flow statistics at these locations. Statistics, 

such as the 7-day 10-year low flow (7Q10), 1-day 10-year low 

flow, 30-day 10-year low flow for both the summer and winter 

periods, harmonic mean, mean annual flow, and flow durations 

(the flow that was exceeded for an indicated percentage of 

time less than or equal to the median flow), are the most commonly requested data. Long-term continuous records of daily 

streamflow at gaging stations and base-flow discharge measurements at low-flow sites are the data on which estimates of 

low-flow statistics at sites with no streamflow data—ungaged 

sites—are based. 

An accurate location of the ungaged site is needed to 

provide the best estimate of streamflow. The location of 

tributaries, reservoir releases, surface-water withdrawals, 

point-source discharges, and well fields affects the low flow 

along a stream. The estimate of a low-flow statistic can 

vary substantially for a location upstream and a location 

downstream from these features.

Accuracy of the low-flow estimates at ungaged sites is 

a function of the sum of errors inherent in the collection and 

computation of streamflow data, the statistical methods used to 

compute the statistics at the gaging stations and low-flow sites, 

and the error involved in transferring those statistics to another 

stream site. These errors include discharge-measurement 

errors at the index site and at the low-flow sites (±5 percent), 

errors in the computation of the daily mean flows at the index 

site, the standard error of prediction of the MOVE1 correlation 

between daily mean flows at the index site, and instantaneous 

measurements of flow at the low-flow sites. For these reasons, 

the estimates of flow are rounded to the nearest 0.1 ft3/s.

32 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Table 7. Results of analysis for trends in peak ratios at selected streamflow-gaging stations in New Jersey.

[ID, identification; R, regulated gaging station; <, less than; %, percent]

Station ID Station name

Significant 

peak-ratio 

trend

Tau p-value

Percent 

urban

(%)

Percent 

agricultural

(%)

Total 

developed

(%)

Physiographic 

province

01391500 Saddle River at Lodi, N.J. (R) Upward 0.5502 <0.0001 81 1 82 Piedmont01394500 Rahway River near Springfield, N.J. (R) Upward .4060 <.0001 77 0 77 Piedmont01475000 Mantua Creek at Pitman, N.J. None .0329 .6099 60 15 75 Coastal Plain01398000 Neshanic River at Reaville, N.J. None -.0875 .0663 24 46 70 Piedmont01400730 Millstone River at Plainsboro, N.J. None .2564 .2224 26 40 66 Coastal Plain01377000 Hackensack River at Rivervale, N.J. (R) Upward .5377 <.0001 62 1 63 Piedmont01402000 Millstone River at Blackwells Mills, N.J. (R) None -.0750 .0911 30 28 58 Piedmont01403500 Green Brook at Plainfield, N.J. (R) None -.0647 .5258 52 1 53 Piedmont

01408000 Manasquan River at Squankum, N.J. None .0532 .2336 34 19 53 Coastal Plain

01381500 Whippany River at Morristown, N.J. None .0399 .6006 49 3 52 Piedmont01400000 North Branch Raritan River near Raritan, N.J. None -.0073 .8829 28 22 50 Piedmont

01464500 Crosswicks Creek at Extonville, N.J. None .0437 .3048 15 32 47 Coastal Plain01379000 Passaic River near Millington, N.J. (R) None .0341 .4512 36 9 45 Piedmont

01396500 South Branch Raritan River near High Bridge, N.J. None -.0406 .3995 28 15 43 New England

01398500 North Branch Raritan River near Far Hills, N.J. None -.0013 .9778 32 10 42 New England01411000 Great Egg Harbor River at Folsom, N.J. Upward .3542 <.0001 29 8 37 Coastal Plain

01457000 Musconetcong River near Bloomsbury, N.J. Downward -.1066 .0088 20 17 37 New England

01445500 Pequest River at Pequest, N.J. Upward .1440 .0016 12 23 35 New England01443500 Paulins Kill at Blairstown, N.J. None .0152 .7263 14 19 33 Valley and Ridge

01465850 South Branch Rancocas Creek at Vincentown, N.J. None -.0390 .6680 10 22 32 Coastal Plain01380500 Rockaway River above Reservoir at Boonton, N.J. Upward .2153 .0119 29 1 30 Piedmont

01387500 Ramapo River near Mahwah, N.J. None .0204 .6724 19 2 21 Piedmont

01408500 Toms River near Toms River, N.J. Downward -.1795 .0300 18 3 21 Coastal Plain01383500 Wanaque River at Awosting, N.J. (R) None .0610 .1277 16 1 17 New England

01409500 Batsto River at Batsto, N.J. Downward -.2747 .0006 5 12 17 Coastal Plain01384500 Ringwood Creek near Wanaque, N.J. None -.0314 .5374 14 0 14 New England

01440000 Flat Brook near Flatbrookville, N.J. None .0362 .4527 3 5 8 Valley and Ridge

01466500 McDonalds Branch in Lebanon State Forest, N.J. None .0748 .2725 0 0 0 Coastal Plain

Estimates of Low-Flow Statistics at Ungaged Sites 33
N E W Y O R K

P E N N S Y L V A N I A

D E L A W A R E

A T L A

N T I C O C E A N

CONNECTICU

T

01445500

01411000

01394500

01391500

01383500

01380500

01377000

01475000

01466500

01465850

01464500

01443500

01440000

01408000

01403500

01400730

01400000

01398500

01396500

01387500 01384500

01381500

01379000 01457000

01409500

01408500

01398000 01402000

Base from U.S. Geological Survey digital line graph files,

1:24,000 North American Datum 1983, UTM, Zone 18N

75° 74°

39°

40°

41°

0 10 20 MILES

0 10 20 KILOMETERS

PHYSIOGRAPHIC PROVINCE

Valley and ridge

New England

Piedmont

Coastal plain

PEAK RATIO

Downward trend and station 

identification number

No trend and station 

identification number

Upward trend and station 

identification number

EXPLANATION

01411000

01398000

01408500

Figure 18. Results of peak-ratio trend analysis, by physiographic province, in New Jersey.

34  Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Ungaged Sites on Streams with Streamflow 

Data and No Regulation

Streamflow data from gaged sites located along the same 

stream as the ungaged site are the best sources of information on which to base an estimate of a low-flow statistic when 

no point-source discharges, diversions, or withdrawals occur 

between the sites. Drainage area is an essential factor used to 

transfer low-flow statistics from a gaged site to an ungaged 

site along a stream reach. The location of the ungaged site 

is used to calculate the drainage area upstream from the site. 

If the ungaged site is upstream or downstream from a gaging station or low-flow site on an unregulated stream, then a 

drainage-area ratio is used to transfer the low-flow data at the 

gaged site to the ungaged site. The flow contributed per unit 

area upstream from the gaged site is presumed to be same for 

the ungaged site.

The stream reach along the South Branch Raritan River 

from the low-flow site at Middle Valley (01396280) (fig. 19) 

downstream to the gaging station at High Bridge (01396500) 

(fig. 19) does not receive any discharge from point sources 

or lose any flow to withdrawals. In the previous section, data 

from these sites were used to demonstrate the MOVE1 correlation method of transferring statistics from a gaging station 

to a low-flow site. The drainage-area ratio method also can be 

used to transfer low-flow statistics from the gaging station to 

the site at Middle Valley. For the purpose of this example, the 

South Branch Raritan River at Middle Valley is treated as an 

ungaged site. In this example, the 7Q10 low flow is transferred 

from the gaging station at High Bridge to a low-flow site 

upstream on the South Branch Raritan River at Middle Valley. 

Estimates from the drainage-area ratio and the MOVE1 correlation technique are compared.

7Q10 flow is transferred from gaging station 01396500 

South Branch Raritan River at High Bridge to a site upstream, 

01396280 South Branch Raritan River at Middle Valley. The 

drainage area at gaging station 01396500 is 65.3 mi2. The 

drainage area at the site at Middle Valley is 47.7 mi2. The 

7Q10 flow for gaging station 01396500 is 22.0 ft3/s. The 7Q10 

flow for station 01396280 is to be determined.

The MOVE1 correlation analysis between the base-flow 

measurements at South Branch Raritan River at Middle Valley 

(01396280) and daily mean flows at gaging station 01396500 

predicts a 7Q10 low flow of 14.1 ft3/s at 01396280 (fig. 8). 

The flow estimated from drainage-area adjustment is about 

17 percent higher than the flow computed from the MOVE1 

analysis. This example shows the difference between the 

estimate of 7Q10 low flow at a low-flow site using base-flow 

measurements and the estimate for the same site when no 

streamflow data are available. If no base-flow measurements 

had been made at the site, the result from the drainagearea ratio method would be used. Base-flow measurements 

allow for a more accurate estimate of 7Q10 low flow. Periods of base flow at the gaging station at High Bridge can be 

related directly to the base-flow measurements at the site at 

Middle Valley.

Ungaged Sites on Streams with Streamflow 

Data and Regulation

Surface-water withdrawals and point-source discharges 

are important factors to consider when transferring streamflow 

statistics from one site to another along a stream reach. When 

low-flow statistics are requested for a site downstream from a 

known withdrawal or point source, it is most effective to use 

data that reflect these human alterations. The drainage-area 

ratio method is not used to transfer the low-flow data from 

the gaged site to the ungaged site along a regulated stream 

reach. The Hackensack River Basin is an example of a highly 

regulated basin with streamflow-gaging stations and low-flow 

sites within the basin.

The streamflow in the Hackensack River downstream 

from the Oradell Reservoir is regulated by the DeForest 

Lake, Lake Tappan, Woodcliff Lake, and Oradell Reservoir 

(fig. 20). Water is diverted from Oradell Reservoir, DeForest 

Lake, and Hackensack River at West Nyack, New York, for 

municipal supply. Gaging stations on the Hackensack River at 

West Nyack, New York (01376800), at Rivervale, New Jersey 

(01377000), at New Milford, New Jersey (01378500), and 

Pascack Brook at Westwood, New Jersey (01377500) (fig. 20) 

record streamflows in the basin. 

This following example shows the procedure for estimating the 7Q10 low flow at an ungaged site on the Hackensack 

River at Hackensack (fig. 21). The gaging station on the 

Hackensack River at New Milford (01378500) (fig. 21) is 

the most downstream streamflow-gaging station in the basin. 

This station records the flow in the Hackensack River downstream from all withdrawals and diversions. The Hackensack 

River between the gaging station and the city of Hackensack 

receives water from the regulated releases on the river and 

(1) Determine the drainage area (DA) ratio (no limits on the 

DA were used):

DAungaged DAgage ⁄ = 47.7 65.3 ⁄ = 0.73

(2) Multiply the calculated ratio by the low-flow statistic for 

the gaging station:

0.73 × 22.0 ft3/s = 16.5 ft3/s (7Q10 flow)

Estimates of Low-Flow Statistics at Ungaged Sites 35
South

Branch

Raritan

River

PENNSYLVANIA NEW YORK DELAWARE

ATLANTIC 

OCEAN

41°

40°

39°

75° 74°

0 10 20 MILES

0 10 20 KILOMETERS

74°50’ 74°45’

40°

45’

40°

40’

Base from U.S. Geological Survey

digital line graph files, 1:24,000

0 1 2 MILES

0 1 2 KILOMETERS

WATERSHED MANAGEMENT AREAS CONTINUOUS-RECORD STREAMFLOWGAGING STATIONS

North and South 

Branch Raritan

Upper Delaware

Active

Inactive

LOW-FLOW PARTIAL-RECORD STATIONS

Active

Inactive

EXPLANATION

SOUTH BRANCH RARITAN RIVER

AT MIDDLE VALLEY, N.J.

SOUTH BRANCH RARITAN RIVER 

NEAR HIGH BRIDGE, N.J.

SOUTH BRANCH RARITAN RIVER

AT CALIFON, N.J.

Area of

detail

Figure 19. Location of continuous-record streamflow-gaging stations and low-flow partial-record stations in the North 

and South Branch Raritan Watershed Management Area (WMA) in New Jersey.

36  Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Hackensa ck

R vi er

H u d s o n R i v e r

Lake Tappan

DeForest

Lake

Woodcliff

Lake

Oradell Reservoir

01378500

01377500

01377000

01376800

PENNSYLVANIA DELAWARE

ATLANTIC 

OCEAN

NEW YORK

CONN.

NEW YORK

41°

75° 74°

39°

40°

0 20 40 MILES

0 20 40 KILOMETERS

Base from U.S. Geological Survey

digital line graph files, 1:24,000

NEW YORK

0 1 2 MILES

0 1 2 KILOMETERS

N E W Y O R K

74° 73°52’30"

41°

41°

7’

30"

EXPLANATION

Continuous-record

streamflow-gaging station

01466500 Station identification number

N E W J E R S E Y

Area of

detail

Figure 20. Location of lakes, reservoirs, and selected streamflow-gaging stations upstream from the Hackensack River in 

New Jersey and vicinity.

Estimates of Low-Flow Statistics at Ungaged Sites 37
Hackensack

River

French

Brook

Coles

Brook

Hirshfield Brook

Oradell

Reservoir

!

HIRSHFELD BROOK 

AT NEW MILFORD, N.J.

FRENCH BK AT

 NEW BRIDGE, N.J.

COLES BK AT

 HACKENSACK, N.J.

HACKENSACK RIVER

AT NEW MILFORD, N.J.

HACKENSACK RIVER

AT HACKENSACK, N.J.

Hackensack

SADDLE RIVER AT

LODI, N.J.

NEW YORK PENNSYLVANIA DELAWARE

ATLANTIC OCEAN

41°

40°

39°

75° 74°

0 10 20 MILES

0 10 20 KILOMETERS

Area of

detail

0 1 2 MILES

0 1 2 KILOMETERS

74°4’ 74°2’ 74°

40°

54’

40°

56’

40°

58’

Base from U.S. Geological Survey

digital line graph files, 1:24,000

WATERSHED MANAGEMENT

AREAS

Hackensack and Pascack

Lower Passaic and Saddle

OTHER SITE

Ungaged site

LOW-FLOW PARTIAL-RECORD

STATIONS

Active

Inactive

EXPLANATION

CONTINUOUS-RECORD STREAMFLOW 

GAGING STATIONS

Active

Inactive ! City

Figure 21. Locations of continuous-record streamflow-gaging stations, low-flow partial-record stations, and an ungaged 

site in the Hackensack and Pascack and the Lower Passaic and Saddle Watershed Management Areas, New Jersey.

38 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
from various tributaries that drain to the river. The drainagearea method cannot be used to accurately transfer the low-flow 

statistics from the gaging station to the site on the Hackensack 

River at Hackensack because the intervening area receives 

streamflow from unregulated sources.

The drainage area at the point of interest along the 

Hackensack River at Hackensack is essential information for 

analysis. The drainage area delineated for the ungaged site is 

131 mi2. The drainage area at the gaging station is 113 mi2. 

The 7Q10 flow at the gaging stations is known. The 7Q10 

flow for the 18 mi2 intervening area is unknown and will be 

estimated from data on unregulated low-flow sites in the area.

Three major tributaries with drainage areas greater than 

0.5 mi2 in size—Coles Brook, French Brook and Hirshfeld 

Brook—drain into the Hackensack River along the reach 

(fig. 21). A low-flow site is present on each of the three major 

tributaries. The MOVE1 correlation analysis, as explained in 

the section on low-flow sites, is used to compute the 7Q10 

flow at each of these sites. The 7Q10 flow from the gaging station and the three low-flow sites were added together. 

The drainage areas at the gaging station in New Milford 

(01378500) (fig. 21) and at the three low-flow sites also were 

added together. The drainage areas at these sites total 125 mi2, 

which is subtracted from the total drainage area at the Hackensack River at Hackensack. The remaining 6.00 mi2

 is the intervening area that contributes an unknown amount of flow to the 

Hackensack River. The flow estimated at the low-flow sites is 

representative of flow from this intervening area. The 7Q10 

flow at each low-flow site is divided by the drainage area to 

give a flow per square mile value. The average 7Q10 flow per 

square mile for the three low-flow sites is used to estimate the 

contribution from the intervening area. In this case, the average 7Q10 flow per square mile is 0.145 ft3

/s. 

The total 7Q10 flow, in cubic feet per second, at the 

Hackensack River at Hackensack, New Jersey, is the sum of 

the following computed and estimated 7Q10 flows:

New Milford (0.0 ft3/s) + Coles Brook (0.92 ft3/s) + 

French Brook at mouth (0.07 ft3/s) + 

Hirschfeld Brook at mouth (0.83 ft3/s) + 

intervening area (0.145 ft3/s/mi2 x 6.0 mi2) = 2.7 ft3/s 

Ungaged Sites on Streams with No Streamflow 

Data and No Regulation

If no streamflow data are available for the stream on 

which the ungaged site is located, averages of the flow per 

square mile at three to six nearby gaging stations or partialrecord stations are used to estimate flows at the site of interest. 

No limits were set on distance from site, physiographic area, 

or drainage area. A map of gaging stations and partial-record 

stations in the area is used to locate the sites closest to the 

ungaged location. At least three gaging stations and(or) partial-record stations are chosen for the estimation of low-flow 

statistics at the ungaged site. Sites affected by known point 

sources or withdrawals are not chosen. The drainage area at 

the ungaged site, again, is an essential factor in estimating 

low-flow statistics. The low-flow values from each of the 

nearby sites are divided by the drainage area to give a flow per 

square mile value. The average flow per square mile from the 

nearby sites is multiplied by the drainage area at the ungaged 

site to obtain an estimated low-flow value.

The following example represents a calculation of 

determining the 1-, 7-, and 30-day 10-year low flows on an 

unnamed tributary to Lake Iliff. Lake Iliff is located on an 

unnamed tributary to the Pequest River (fig. 22). No streamflow data are available for the unnamed tributary to the 

Pequest River. The drainage basin at the specified location 

was delineated and found to drain an area of 0.28 mi2. The 

low-flow sites on the Pequest River at Huntsville (01445000), 

the Wallkill River at the outlet of Lake Mohawk at Sparta 

(01367620), and the discontinued gaging station on the East 

Branch Paulins Kill tributary 2 at Woodruff (01443260) 

(fig. 22) were chosen to represent low flows in the area. 

All three sites are located within a 5-mile radius of the 

ungaged site. The flow statistics at each of the three sites 

were computed from MOVE1 correlation analysis. The 

statistics were converted to a flow-per-square-mile value 

and averaged with the flow-per-square-mile values estimated 

at the other two sites. For the 7Q10 flow, the flow-per-squaremile values were very close. The three values ranged from 

0.062 ft3/s/mi2 to 0.075 ft3/s/mi2. The average flow per square 

mile (0.068 ft3/s/mi2) was multiplied by the drainage area of 

0.28 mi2 to give an estimate of 0.019 ft3/s. Estimated flows 

are rounded to the nearest 0.1 ft3/s, resulting in an estimate 

of 0.0 ft3/s. 

Ungaged Sites Downstream from a Permitted 

Point Source

Low-flow statistics at ungaged sites downstream from 

major permitted point sources can be estimated from data for 

gaging stations or low-flow sites, including sites affected by 

permitted point-source discharge, or from data for sites that 

are unaffected by the discharge. Streamflow data for sites on 

the stream are preferred and are used when available. The 

flow-per-square-mile value at a site located downstream from 

the major point source is used when point-source discharge is 

included in the estimate. When natural streamflow estimates 

are requested, statistics are computed from streamflow data 

for gaging stations and partial-record stations upstream from 

the point source and other sites on unregulated streams in the 

area. Streamflow statistics for these sites are divided by the 

drainage area at the site. The flow-per-square-mile values for 

all the sites chosen in the area are averaged. The average value 

is multiplied by the drainage area at the ungaged site. When 

natural streamflow estimates are requested, data from sites 

downstream from the major point source are not used because 

the permitted discharge cannot be deducted accurately from 

the streamflow data because historical records of point-source 

Estimates of Low-Flow Statistics at Ungaged Sites 39
East Bra nch Paulins Kill

Wallkill River

Pequest

River

Lake Mohawk

Lake Hopatcong

Lake Iliff

EAST BRANCH PAULINS KILL TRIB 2

 NEAR WOODRUFFS GAP, N.J.

PEQUEST RIVER AT

 HUNTSVILLE, N.J.

WALLKILL R AT OUTFLOW OF

 LK MOHAWK AT SPARTA, N.J.

EAST BRANCH PAULINS 

KILL NEAR LAFAYETTE, N.J. EAST BRANCH PAULINS KILL TRIB 1

 NEAR LAFAYETTE, N.J.

PAULINS KILL AT

 LAFAYETTE, N.J.

UNNAMED TRIBUTARY

 TO LAKE ILIFF

NEW YORK

PENNSYLVANIA DELAWARE

ATLANTIC 

OCEAN

41°

40°

39°

75° 74°

0 10 20 MILES

0 10 20 KILOMETERS

Area of

detail

74°45’ 74°40’

41°

41°

5’

0 1 2 MILES

0 1 2 KILOMETERS

Base from U.S. Geological Survey

digital line graph files, 1:24,000

WATERSHED MANAGEMENT

AREAS

Upper Delaware

Wallkill

OTHER SITE

Ungaged site

LOW-FLOW PARTIAL-RECORD

STATIONS

Active

Inactive

EXPLANATION

STREAMFLOW-GAGING STATIONS

Active

Inactive

Figure 22. Locations of an ungaged site on an unnamed tributary to Lake Iliff and continuous-record streamflow-gaging stations and low-flow partial-record stations in the Upper Delaware and Wallkill Watershed Management Areas in New Jersey.

40 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
discharge usually are not readily available. Current data (2005) 

on discharges from permitted point sources are more readily 

available than historical data; however, discharges vary over 

time and accurate adjustments to historical streamflow cannot 

be computed.

Summary and Conclusions

Streamflow measurements and statistics are needed by 

engineers, water managers, and planners. High-flow statistics 

are used to design bridges, dams, and flood-control structures, 

whereas low-flow statistics are used for allocating surfacewater withdrawals and for setting waste-load allocation 

limits. The statistics also are a critical part of studies of total 

maximum daily loads. In order to update streamflow statistics for New Jersey the U.S. Geological Survey (USGS), in 

cooperation with the New Jersey Department of Environmental Protection (NJDEP), analyzed the continuous records of 

streamflow at 111 gaging stations throughout New Jersey with 

20 or more years of record through the 2001 water year. The 

characteristics presented for the long-term continuous-record 

stations are minimum, maximum, and mean daily streamflow; 

harmonic mean flow; 1-,7-, and 30-day minimum average low 

flow with 2-, 5-, 10-, and 20-year recurrence intervals; 1-,7-, 

and 30-day maximum average high flow with 2-, 5-, 10-, and 

25-year recurrence intervals; and 1-, 2-, 5-, 10-, 20-, 25-, 30-, 

40-, 50-, 60-, 70-, 75-, 80-, 85-, 90-, 95-, 99-percent daily flow 

durations. Flow frequencies and flow durations are presented 

for both annual and winter (November through April) periods.

Instantaneous measurements of streamflow at low-flow 

conditions at 500 partial-record stations, including 66 gaging 

stations with less than 20 years of record, were used to estimate streamflow statistics for these sites. MOVE1 correlation 

analysis was used to relate instantaneous base-flow measurements at the partial-record stations to daily mean discharges at 

long-term continuous-record gaging stations. The characteristics presented for the partial-record stations are daily mean 

flow; harmonic mean flow; and 1-, 7-, and 30-day minimum 

average low flow with a 10-year recurrence interval for the 

annual and winter periods.

Tables of the streamflow statistics reported in this document are available on the USGS World Wide Web site at 

http://pubs.water.usgs.gov/sir20055105/. Information presented on the Web site will be updated to include revised 

estimates of statistics at partial-record stations as new data are 

collected and MOVE1 correlations are rerun and analyzed. 

Harmonic mean flow was computed for all the gaging 

stations with 10 or more years of record and estimated for 

all partial-record stations. Harmonic mean flows at gaging 

stations were compared to statistics of flow duration and 

low-flow frequency by evaluating percent differences at each 

site and by using ordinary least squares regression. The 

statistic most closely related to the harmonic mean flow, 

when studying all gaging stations in the study area, was the 

75-percent flow.

The variability in streamflow at a gaging station was 

measured using the coefficient of variation, the ratio of instantaneous peak flow to 3-day mean flow surrounding the peak, 

the ratios of 25-percent/75-percent and 10-percent/90-percent 

flow durations, and the ratios of 1-day 2-year high flow/1-day 

2-year low flow and 1-day 20-year high flow /1-day 20-year 

low flow. Streamflow variability was significantly greater 

among the group of gaging stations located outside the Coastal 

Plain than the group of gaging stations located inside the 

Coastal Plain. The median value of the 25-percent/75-percent 

ratio was 4.12 for the 38 analyzed gaging stations outside the 

Coastal Plain and 2.16 for the 20 analyzed gaging stations in 

the Coastal Plain. Streamflow variability also was compared 

between gaging stations in different land-use categories. In the 

Coastal Plain, significant differences in streamflow variability were found between gaging stations draining areas with 

more than 30-percent developed land and those draining areas 

with more than 70-percent undeveloped land. Variability was 

greater in the developed basins.

Trend tests were run on the annual 1-, 7-, and 30-day 

high- and low-flow data sets. The percentages of gaging 

stations with significant high-flow trends were 16, 13, and 7 

for the annual 1-, 7-, and 30-day periods, respectively. The 

percentages of gaging stations with significant low-flow trends 

were 25, 25, and 20 for the annual 1-, 7-, and 30-consecutiveday periods, respectively. 

The trend analysis for the unregulated gaging stations 

identified as undeveloped sites did not indicate high-flow 

trends, except for the 7-day mean at one gaging station. The 

results of trend tests for high flows indicate relations between 

upward trends for high flows and stream regulation, and high 

flows and development in the basin. The relation between 

development and low-flow trends does not appear to be as 

strong as for development and high-flow trends. 

A significant upward trend in precipitation in northern 

New Jersey, Climate Division 1 was identified. For Climatic 

Division 2, no general increase in average precipitation was 

observed. Trend test results indicate that high flows at undeveloped, unregulated sites have not been affected by the 

increase in average precipitation. The high-flow trends at 

regulated and unregulated gaging stations could be associated 

with increased development.

Low-flow statistics are estimated for stream sites with 

no flow data. Procedures are presented for estimating statistics at ungaged sites on streams with (1) streamflow data 

and no regulation, (2) streamflow data and regulation, (3) no 

streamflow data and no regulation, and (4) no streamflow data 

downstream from a permitted point source.

Summary and Conclusions  41
Literature Cited

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1976, A land use and land cover clas­sification system for 

use with remote sensor data: U.S. Geological Survey Professional Paper 964, 28 p.

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Jersey: U.S. Geological Survey Water-Supply Paper 2375, 

p. 401–408.

Buchanan, T.J., Miller, E.J., and Ludlow J.M., 1965, Baseflow relations for partial-record stations in New Jersey: 

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no. 4, p. 1081–1088.

Jarrell, W.M., 1999, Getting started with TMDLs: Portland, 

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September 2002) (Accessed February 3, 2003, 

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Energy, 1992, Geologic map of New Jersey: Trenton, N.J., 

New Jersey Department of Environmental Protection and 

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Reed, T.J., White, B.T., Centinaro, G.L., Dudek, J.F., Spehar, 

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seasonal variability of volatile organic compounds in seven 

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42 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
B

base flow Sustained or fair weather

streamflow in the absence of direct runoff. It

includes natural and human-induced streamflows. Natural base flow is sustained largely

by ground-water discharge.

C

climatic year  A continuous 12-month period

during which a complete annual cycle occurs,

arbitrarily selected for the presentation of data

relative to hydrologic or meteorlogic phenomena. The climatic year is usually designated

by the calendar year during which the most of

the 12 months occur.

coefficient of variation  The standard deviation divided by the mean for a given data

series, a dimensionless measure of relative

variability.

continuous-record streamflow-gaging station 

(gaging station) A site on a stream, canal,

lake, or reservoir where systematic observations of gage height or discharge are obtained,

a site where data are recorded with sufficient

frequency to define daily mean values and

variations within a day.

cubic foot per second (ft3/s or cfs) The rate

of streamflow representing a volume of

1 cubic foot passing a given point in 1 second.

D

daily mean streamflow data Average of the

continuous record of streamflow at regular,

pre-determined intervals during the day.

design flow The regulatory streamflow used

to establish New Jersey Department of Environmental Protection water-quality criteria

and permit requirements.

diversion In this report, a diversion is the

taking of water from a stream or other body of

water into a canal, pipe, or other conduit.

drainage area Land area measured in the

horizontal plane, upstream from a specific

location on a stream where runoff from precipitation and discharge from ground-water

sources drain by gravity into the stream.

F

flow, natural The flow of a stream as it

occurs under natural conditions; that is, not

subjected to any regulation or diversion.

flow, regulated The flow of a stream that

has been subjected to any artificial or manmade storage, augmentation, or diversion.

flow-duration curve A cumulative-frequency curve that shows the percentage of

time that specified discharges are exceeded.

The flow-duration curve is based on daily

mean flow from the period of record, but the

chronologic sequence of flows is omitted

from consideration in the preparation of the

curve. Therefore, it is impossible to tell from

the flow-duration curve alone whether varying periods of low flow all occurred during

one drought period or were scattered over a

number of years. The flow-duration curve is,

however, useful for studying the flow characteristics of a stream over its entire range of

discharge.

G

gaging station A site on a stream, canal,

lake, or reservoir where systematic observations of gage height or discharge are obtained.

L

low-flow frequency curve A graph showing the relation between the magnitude and

frequency of the annual lowest mean flow for

a given number of consecutive days. Lowflow frequency is expressed as the average

interval, in years, between recurrences of an

annual minimum flow less that shown by the

magnitude scale. The low-flow frequency

relation is commonly presented as a family of

curves with a separate curve for each number

of consecutive days.

Glossary

Glossary 43
low-flow partial-record station (partialrecord station) A site where discrete

measurements of one or more hydrologic

characteristics are obtained over a period of

time without continuous data being recorded

or computed.

P

peak flow The maximum instantaneous

flow of a stream or river at a given location.

This flow usually occurs at or near the time of

maximum stage.

peak ratio Computed from annual peak

flow, which is the maximum instantaneous

streamflow value for the water year, divided

by the 3-day mean flow for 3 consecutive

days including the day before, day of, and day

after the peak. Peak ratio is a measure of the

magnitude of the rise and fall of a stream over

a given period of time.

R

regulation Artificial manipulation of the

flow of a stream, such as artificial lakes, the

operation of reservoirs, and for example cranberry bogs in Southern New Jersey.

recurrence interval The time interval, in

years, within which a given hydrologic event

will, on the average, be less or more than a

given value one time. It is the reciprocal of

the probability that the given hydrologic event

will not be exceeded or will be exceeded in

any one year. For example, a 20-year low flow

is one that has a 5 percent chance of not being

exceeded in any one year.

S

standard error of estimate Computed

using the standard error of prediction of the

MOVE.1 line and the time-sampling error for

the index station (Telis, 1991).

standard error of prediction Measure of the

fit of the correlation of discharge data for two

stations for a MOVE.1 line (Telis, 1991).

T

total maximum daily loads (TMDLs) The

maximum quantity of a contaminant that can

enter a water body without adversely affecting

the beneficial uses of the water body (Jarrell,

1999).

W

water year In U.S. Geological Survey

reports dealing with surface-water supply,

the water year is the 12-month period,

October 1 through September 30, designated

by the calendar year in which it ends.

44 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Tables 3 and 4
46 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003 Table 3.  Results of trend tests on the lowest annual n-day flow for the climatic year ending March 31 and the winter period from November through April at 138 streamflow-gaging stations in New Jersey.—Continued [+, significant upward trend; -, significant downward trend; *, no significant trend was detected; USGS, U.S. Geological Survey] USGS station number Station name Period of record Kendall Tau trend test Annual low flow Winter low flow Begin End 1-day 7-day 30-day 1-day 7-day 30-day 01368000 Wallkill River near Unionville, N.Y. 10/1/1937 9/30/1981 * * * * * * 01369000 Pochuck Creek near Pine Island, N.Y. 10/1/1937 9/30/1978 * * * * * * 01376280 Sparkill Creek at Sparkill, N.Y. 10/1/1959 9/30/1980 * * * * * * 01376800 Hackensack River at West Nyack, N.Y. 10/1/1959 9/30/2001 * * * * * * 01377000 Hackensack River at Rivervale, N.J. 10/1/1956 9/30/2001 * * * * * * 01377000 Hackensack River at Rivervale, N.J. 10/1/1941 9/30/1956 * * * * * * 01377500 Pascack Brook at Westwood, N.J. 10/1/1934 9/30/2001

+

+

+ * * *

01378500 Hackensack River at New Milford, N.J. 10/1/1921 9/30/2001

+

+ * + * -

01379000 Passaic River near Millington, N.J. 10/1/1903 9/30/2001 * * * * * *01379000 Passaic River near Millington, N.J. 10/1/1979 9/30/2001 * * * * * *

01379000 Passaic River near Millington, N.J. 10/1/1903 9/30/1979 * - * * * *01379500 Passaic River near Chatham, N.J. 10/1/1903 9/30/2001

+

+

+

+

+

+

01379700 Rockaway River at Berkshire Valley, N.J. 10/1/1984 9/30/1996 * * * * * *

01379773 Green Pond Brook at Picatinny Arsenal, N.J. 10/1/1982 9/30/2000 * - - * * *01379780 Green Pd Bk Bl Picatinny Lk at Picatinny Arsenal, N.J. 10/1/1984 9/30/2001 * * * * * *

01379790 Green Pond Brook at Wharton, N.J. 10/1/1982 9/30/2001 - - - * * *

01380000 Beaver Bk at outlet of Splitrock Res, N.J. 10/1/1925 9/30/1989

+

+

+ * * *

01380500 Rockaway River above Reservoir at Boonton, N.J. 10/1/1937 9/30/2001 * * * * * *01381000 Rockaway River below Reservoir at Boonton, N.J. 10/1/1925 9/30/2001

+

+

+

+

+ *

01381500 Whippany River at Morristown, N.J. 10/1/1921 9/30/2001

+

+

+

+

+

+

01381900 Passaic River at Pine Brook, N.J. 10/1/1979 9/30/2001 * * * * * +

01382500 Pequannock River at Macopin Intake Dam, N.J. 10/1/1961 9/30/2001

+

+

+

+ * +

01382500 Pequannock River at Macopin Intake Dam, N.J. 10/1/1922 9/30/1961 * * * * * *

01383500 Wanaque River at Awosting, N.J. 10/1/1918 9/30/2001 * * * * * *01384000 Wanaque River at Monks, N.J. 10/1/1934 9/30/1985 - - - * * *

01384500 Ringwood Creek near Wanaque, N.J. 10/1/1934 9/30/2001 * * * * * *01385000 Cupsaw Bk near Wanaque, N.J. 10/1/1934 9/30/1958 - - - * * *

01386000 West Brook near Wanaque, N.J. 10/1/1934 9/30/1978 * * * * * *
Table 3.  Results of trend tests on the lowest annual n-day flow for the climatic year ending March 31 and the winter period from November through April at 138

streamflow-gaging stations in New Jersey.—Continued[+, significant upward trend; -, significant downward trend; *, no significant trend was detected; USGS, U.S. Geological Survey]

USGS station 

number Station name

Period of record

Kendall Tau trend test

Annual low flow Winter low flow

Begin End 1-day 7-day 30-day 1-day 7-day 30-day

01386500 Blue Mine Brook near Wanaque, N.J. 10/1/1934 9/30/1958 - - - - - *01387000 Wanaque River at Wanaque, N.J. 10/1/1928 9/30/2001 * * * * * *01387000 Wanaque River at Wanaque, N.J. 10/1/1911 9/30/1928 * * * * * *01387400 Ramapo River at Ramapo, N.Y. 10/1/1978 9/30/2001 * * * * * *01387420 Ramapo River at Suffern, N.Y. 10/1/1978 9/30/2001 * * * * * *

01387450 Mahwah River near Suffern, N.Y. 10/1/1958 9/30/1995 * * * * - -01387500 Ramapo River near Mahwah, N.J. 10/1/1903 9/30/2001 * * * * * *

01388000 Ramapo River at Pompton Lakes, N.J. 10/1/1921 9/30/2001 + * * * * *

01388500 Pompton River at Pompton Plains, N.J. 10/1/1903 9/30/2001 * - * * * *01389500 Passaic River at Little Falls, N.J. 10/1/1927 9/30/2001 + * * * * *

01389500 Passaic River at Little Falls, N.J. 10/1/1896 9/30/1927 * - - - - *

01390500 Saddle River at Ridgewood, N.J. 10/1/1954 9/30/2001 - - * - - -

01391000 Hohokus Brook at Ho-ho-kus, N.J. 10/1/1954 9/30/1996 + + + + + +01391500 Saddle River at Lodi, N.J. 10/1/1965 9/30/2001 * * * * * *

01391500 Saddle River at Lodi, N.J. 10/1/1923 9/30/1965 * * * * * *

01392000 Weasel Bk at Clifton, N.J. 10/1/1951 9/30/1962 * * + * * *

01392000 Weasel Bk at Clifton, N.J. 10/1/1936 9/30/1950 * * * * * *01392210 Third River at Passaic, N.J. 10/1/1976 9/30/1997 * * * * * *

01392500 Second River at Belleville, N.J. 10/1/1936 9/30/1964 * * * * * *01393450 Elizabeth River at Ursino Lake at Elizabeth, N.J. 10/1/1951 9/30/2001 * - - * - *

01393450 Elizabeth River at Ursino Lake at Elizabeth, N.J. 10/1/1921 9/30/1951 + + + + + +01394000 WB Rahway River at Millburn, N.J. 10/1/1940 9/30/1950 * * * * - -

01394500 Rahway River near Springfield, N.J. 10/1/1938 9/30/2001 + + + + + +

01395000 Rahway River at Rahway, N.J. 10/1/1921 9/30/2001 - - * - * *01396000 Robinsons Branch at Rahway, N.J. 10/1/1939 9/30/1999 * * + + + +

01396500 South Branch Raritan River near High Bridge, N.J. 10/1/1918 9/30/2001 * * * * * *

01396580 Spruce Run at Glen Gardner, N.J. 10/1/1977 9/30/2001 * * * * * *

01396660 Mulhockaway Creek at Van Syckel, N.J. 10/1/1976 9/30/2001 * * * * * *

Table 3 47
48 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003 Table 3.  Results of trend tests on the lowest annual n-day flow for the climatic year ending March 31 and the winter period from November through April at 138 streamflow-gaging stations in New Jersey.—Continued [+, significant upward trend; -, significant downward trend; *, no significant trend was detected; USGS, U.S. Geological Survey] USGS station number Station name Period of record Kendall Tau trend test Annual low flow Winter low flow Begin End 1-day 7-day 30-day 1-day 7-day 30-day 01396800 Spruce Run at Clinton, N.J. 10/1/1963 9/30/2001 * * * * * * 01397000 SB Raritan River at Stanton, N.J. 10/1/1963 9/30/2001 * * * * * * 01397000 SB Raritan River at Stanton, N.J. 10/1/1903 9/30/1963 * * * * * * 01397500 Walnut Brook near Flemington, N.J. 10/1/1935 9/30/1961 * * * * * * 01398000 Neshanic River at Reaville, N.J. 10/1/1930 9/30/2001 * * * * * * 01398045 Back Brook Tributary near Ringoes, N.J. 10/1/1976 9/30/1988 * * * * * * 01398107 Holland Brook at Readington, N.J. 10/1/1977 9/30/1996 * * * * * * 01398500 NB Raritan River near Far Hills, N.J. 10/1/1921 9/30/2001 * * * * * * 01399190 Lamington (Black) River at Succasunna, N.J. 10/1/1976 9/30/1987 * * * * * * 01399200 Lamington (Black) River near Ironia, N.J. 10/1/1940 9/30/1987 * * * * * * 01399500 Lamington (Black) River near Pottersville, N.J. 10/1/1921 9/30/2001 * * * * * * 01399510 Upper Cold Brook near Pottersville, N.J. 10/1/1972 9/30/1997

+ * * * * *

01399525 Axle Brook near Pottersville, N.J. 10/1/1977 9/30/1989 * * * * * *01399670 SB Rockaway Creek at Whitehouse Station, N.J. 10/1/1976 9/30/2001 - - * * * *

01400000 North Branch Raritan River near Raritan, N.J. 10/1/1923 9/30/2001

+ * * +

+

+

01400300 Peters Brook near Raritan, N.J. 10/1/1977 9/30/1996 * * * +

+

+

01400350 Macs Brook at Somerville, N.J. 10/1/1981 9/30/1996 * * * * * *01400500 Raritan River at Manville, N.J. 10/1/1963 9/30/2001

+

+ * * * *

01400500 Raritan River at Manville, N.J. 10/1/1903 9/30/1963 * - * * * *01400730 Millstone River at Plainsboro, N.J. 10/1/1963 9/30/1990 * * * * + *

01401000 Stony Brook at Princeton, N.J. 10/1/1953 9/30/2001

+

+ * + * *

01401500 Millstone River near Kingston, N.J. 10/1/1933 9/30/1949 * * * * * *

01401650 Pike Run at Belle Mead, N.J. 10/1/1979 9/30/2001 * * * * * *

01402000 Millstone River at Blackwells Mills, N.J. 10/1/1921 9/30/2001 * * * * * *01402600 Royce Brook Tributary near Belle Mead, N.J. 10/1/1966 9/30/1996

+

+

+ * * *

01403060 Raritan River below Calco Dam at Bound Brook, N.J. 10/1/1963 9/30/2001 * * * * * *

01403060 Raritan River below Calco Dam at Bound Brook, N.J. 10/1/1902 9/30/1963 - - - * * *

01403150 West Branch Middle Brook near Martinsville, N.J. 10/1/1978 9/30/2001 * * * * * *
Table 3.  Results of trend tests on the lowest annual n-day flow for the climatic year ending March 31 and the winter period from November through April at 138

streamflow-gaging stations in New Jersey.—Continued[+, significant upward trend; -, significant downward trend; *, no significant trend was detected; USGS, U.S. Geological Survey]

USGS station 

number Station name

Period of record

Kendall Tau trend test

Annual low flow Winter low flow

Begin End 1-day 7-day 30-day 1-day 7-day 30-day

01403400 Green Brook at Seeley Mills, N.J. 10/1/1978 9/30/2001 * * * * * *01403500 Green Brook at Plainfield, N.J. 10/1/1938 9/30/1985 * * * * * *01403535 EB Stony Brook at Best Lake at Watchung, N.J. 10/1/1979 9/30/2001 * * * * * *01403540 Stony Brook at Watchung, N.J. 10/1/1974 9/30/2001 * * * * * *01405000 Lawrence Brook at Farrington Dam, N.J. 10/1/1926 9/30/1990 + * * * * *

01405030 Lawrence Bk at Westons Mills, N.J. 10/1/1988 9/30/2001 * * * * * *01405300 Matchaponix Brook at Spotswood, N.J. 10/1/1956 9/30/1967 * * * * * *

01405400 Manalapan Brook at Spotswood, N.J. 10/1/1956 9/30/2001 * * * * - -

01405500 South River at Old Bridge, N.J. 10/1/1938 9/30/1989 * * * * * *01407000 Matawan C at Matawan, N.J. 10/1/1931 9/30/1955 * * * * * *

01407500 Swimming River near Red Bank, N.J. 10/1/1921 9/30/2001 - - - - - -

01407705 Shark River near Neptune City, N.J. 10/1/1966 9/30/2001 * * * * * *

01407760 Jumping Brook near Neptune City, N.J. 10/1/1966 9/30/2001 * * * + * *01408000 Manasquan River at Squankum, N.J. 10/1/1931 9/30/2001 * * * * * *

01408029 Manasquan River near Allenwood, N.J. 10/1/1989 9/30/2001 * - - * * *

01408120 North Branch Metedeconk River near Lakewood, N.J. 10/1/1972 9/30/2001 * * * * * *

01408500 Toms River near Toms River, N.J. 10/1/1966 9/30/2001 * * * * - *01408500 Toms River near Toms River, N.J. 10/1/1928 9/30/1966 * * * * * *

01409000 Cedar Creek at Lanoka Harbor, N.J. 10/1/1931 9/30/1971 - * * - * *01409095 Oyster Creek near Brookville, N.J. 10/1/1964 9/30/1985 * * * * * *

01409280 Westecunk Creek at Stafford Forge, N.J. 10/1/1973 9/30/1988 * * * * * *01409400 Mullica River near Batsto, N.J. 10/1/1956 9/30/2001 * * * * * *

01409500 Batsto River at Batsto, N.J. 10/1/1927 9/30/2001 * * * * * *

01409810 West Branch Wading River near Jenkins, N.J. 10/1/1974 9/30/1997 * * * * * *01410000 Oswego River at Harrisville, N.J. 10/1/1930 9/30/2001 * * * * * *

01410150 East Branch Bass River near New Gretna, N.J. 10/1/1977 9/30/2001 + * * + + +

01410500 Absecon Creek at Absecon, N.J. 10/1/1945 9/30/1985 + + + + + +

01411000 Great Egg Harbor River at Folsom, N.J. 10/1/1924 9/30/2001 * * * * * *

Table 3 49
Table 3.  Results of trend tests on the lowest annual n-day flow for the climatic year ending March 31 and the winter period from November through April at 138

streamflow-gaging stations in New Jersey.—Continued[+, significant upward trend; -, significant downward trend; *, no significant trend was detected; USGS, U.S. Geological Survey]

USGS station 

number Station name

Period of record

Kendall Tau trend test

Annual low flow Winter low flow

Begin End 1-day 7-day 30-day 1-day 7-day 30-day

01411300 Tuckahoe River at Head of River, N.J. 10/1/1969 9/30/2001 * * * * * *01411456 Little Ease Rn near Clayton, N.J. 10/1/1987 9/30/2001 * * * * * *01411500 Maurice River at Norma, N.J. 10/1/1932 9/30/2001 * * * * - -01412000 Menantico Creek near Millville, N.J. 10/1/1930 9/30/1985

+ * * * * *

01412500 WB Cohansey River at Seeley, N.J. 10/1/1950 9/30/1967 * * * * * -

01412800 Cohansey River at Seeley, N.J. 10/1/1977 9/30/1988 - - * * * *01434000 Delaware River at Port Jervis, N.Y. 10/1/1954 9/30/2001

+

+ * * * *

01434000 Delaware River at Port Jervis, N.Y. 10/1/1904 9/30/1954 * +

+ * * +

01437500 Neversink River at Godeffroy, N.Y. 10/1/1954 9/30/2001 * * * +

+

+

01437500 Neversink River at Godeffroy, N.Y. 10/1/1937 9/30/1954 * * * - * *

01438500 Delaware River at Montague, N.J. 10/1/1954 9/30/2001 * * * * * *

01438500 Delaware River at Montague, N.J. 10/1/1939 9/30/1954 * * * * * +

01440000 Flat Brook near Flatbrookville, N.J. 10/1/1923 9/30/2001 * * * * * *01440200 Delaware River near Delaware Water Gap, Pa. 10/1/1963 9/30/1996 * * * * * *

01443500 Paulins Kill at Blairstown, N.J. 10/1/1921 9/30/2001 * * * * * *

01443900 Yards Creek near Blairstown, N.J. 10/1/1966 9/30/2001

+

+

+

+

+ *

01445000 Pequest River at Huntsville, N.J. 10/1/1939 9/30/1962 * * * * * *01445500 Pequest River at Pequest, N.J. 10/1/1921 9/30/2001 * * * * * *

01446000 Beaver Brook near Belvidere, N.J. 10/1/1922 9/30/1961 * * * * * *01446500 Delaware River at Belvidere, N.J. 10/1/1954 9/30/2001 * * * * * *

01446500 Delaware River at Belvidere, N.J. 10/1/1922 9/30/1954 * * * * * +01453000 Lehigh River at Bethlehem, Pa. 10/1/1902 9/30/1990

+

+

+

+

+

+

01455200 Pohatcong Creek at New Village, N.J. 10/1/1959 9/30/1969 * * * * * *

01455500 Musconetcong River at out of Lake Hopatcong, N.J. 10/1/1927 9/30/1976 - - - - - -01456000 Musconetcong River near Hackettstown, N.J. 10/1/1921 9/30/1974 * * * * * *

01457000 Musconetcong River near Bloomsbury, N.J. 10/1/1903 9/30/2001 * * * * * *

01457500 Delaware River at Riegelsville, N.J. 10/1/1954 9/30/1971 * * * * * *

01457500 Delaware River at Riegelsville, N.J. 10/1/1905 9/30/1954

+

+

+ * +

+

50 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Table 3.  Results of trend tests on the lowest annual n-day flow for the climatic year ending March 31 and the winter period from November through April at 138

streamflow-gaging stations in New Jersey.—Continued[+, significant upward trend; -, significant downward trend; *, no significant trend was detected; USGS, U.S. Geological Survey]

USGS station 

number Station name

Period of record

Kendall Tau trend test

Annual low flow Winter low flow

Begin End 1-day 7-day 30-day 1-day 7-day 30-day

01460440 Delaware and Raritan Ca at Port Mercer, N.J. 10/1/1989 9/30/2001 * * * * * *01460500 Delaware and Raritan Canal at Kingston, N.J. 10/1/1946 9/30/1992 * * * + + +01463500 Delaware River at Trenton, N.J. 10/1/1954 9/30/2001 * * * * * *01463500 Delaware River at Trenton, N.J. 10/1/1912 9/30/1954 * * * * * +01464000 Assunpink Creek at Trenton, N.J. 10/1/1954 9/30/2001 * * * * * *

01464000 Assunpink Creek at Trenton, N.J. 10/1/1923 9/30/1954 + * * + * +01464500 Crosswicks Creek at Extonville, N.J. 10/1/1939 9/30/2001 * * * * * *

01465850 SB Rancocas C at Vincentown, N.J. 10/1/1960 9/30/2001 * * * * * *01466000 MB Mt Misery Bk in Lebanon State Forest, N.J. 10/1/1952 9/30/1977 * * * * * *

01466500 McDonalds Branch in Lebanon State Forest, N.J. 10/1/1953 9/30/2001 - - - - - -

01467000 North Branch Rancocas Creek at Pemberton, N.J. 10/1/1921 9/30/2001 * * * * * *

01467081 South Branch Pennsauken Creek at Cherry Hill, N.J. 10/1/1967 9/30/2001 * * * * * *01467150 Cooper River at Haddonfield, N.J. 10/1/1987 9/30/2001 * * * * * *

01467150 Cooper River at Haddonfield, N.J. 10/1/1963 9/30/1987 + + + + + +

01474500 Schuylkill River at Philadelphia, Pa. 10/1/1931 9/30/1991 + + + + * *

01475000 Mantua Creek at Pitman, N.J. 10/1/1939 9/30/1977 * * * * * *

01477120 Raccoon Creek near Swedesboro, N.J. 10/1/1965 9/30/2001 * * * * * *01482500 Salem River at Woodstown, N.J. 10/1/1939 9/30/1990 * * * * * *

01483000 Alloway Creek at Alloway, N.J. 10/1/1952 9/30/1973 * * * * * *

Table 3 51
52 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003 Table 4.  Results of trend tests on the highest annual n-day flow for the water year ending September 30 and the winter period from November through April at 138 streamflow-gaging stations in New Jersey.—Continued [+, significant upward trend; -, significant downward trend; *, no significant trend was detected; USGS, U.S. Geological Survey] USGS station number Station name Period of record Kendall Tau trend test Annual low flow Winter low flow Begin End 1-day 7-day 30-day 1-day 7-day 30-day 01368000 Wallkill River near Unionville, N.Y. 10/1/1937 9/30/1981 * * * * * * 01369000 Pochuck Creek near Pine Island, N.Y. 10/1/1937 9/30/1978 * * * * * * 01376280 Sparkill Creek at Sparkill, N.Y. 10/1/1959 9/30/1980 * * * * * * 01376800 Hackensack River at West Nyack, N.Y. 10/1/1959 9/30/2001 * * * * * * 01377000 Hackensack River at Rivervale, N.J. 10/1/1956 9/30/2001

+ * * * * *

01377000 Hackensack River at Rivervale, N.J. 10/1/1941 9/30/1956 * * * * * *

01377500 Pascack Brook at Westwood, N.J. 10/1/1934 9/30/2001 * * * * * *

01378500 Hackensack River at New Milford, N.J. 10/1/1921 9/30/2001 * * - * - -01379000 Passaic River near Millington, N.J. 10/1/1903 9/30/2001

+

+ * * * *

01379000 Passaic River near Millington, N.J. 10/1/1979 9/30/2001 * * * * * *

01379000 Passaic River near Millington, N.J. 10/1/1903 9/30/1979

+

+ * * * *

01379500 Passaic River near Chatham, N.J. 10/1/1903 9/30/2001 * * * * * *01379700 Rockaway River at Berkshire Valley, N.J. 10/1/1984 9/30/1996 * * * * * *

01379773 Green Pond Brook at Picatinny Arsenal, N.J. 10/1/1982 9/30/2000 * * * * * *01379780 Green Pd Bk Bl Picatinny Lk at Picatinny Arsenal, N.J. 10/1/1984 9/30/2001 * * * * * *

01379790 Green Pond Brook at Wharton, N.J. 10/1/1982 9/30/2001 * * * * * *01380000 Beaver Bk at outlet of Splitrock Res, N.J. 10/1/1925 9/30/1989 * * * + * *

01380500 Rockaway River above Reservoir at Boonton, N.J. 10/1/1937 9/30/2001

+ * * * * *

01381000 Rockaway River below Reservoir at Boonton, N.J. 10/1/1925 9/30/2001

+

+

+

+

+

+

01381500 Whippany River at Morristown, N.J. 10/1/1921 9/30/2001

+

+

+

+

+

+

01381900 Passaic River at Pine Brook, N.J. 10/1/1979 9/30/2001 * * * * * *

01382500 Pequannock R at Macopin Intake Dam, N.J. 10/1/1961 9/30/2001 * * +

+

+

+

01382500 Pequannock R at Macopin Intake Dam, N.J. 10/1/1922 9/30/1961 * * * * * *01383500 Wanaque River at Awosting, N.J. 10/1/1918 9/30/2001

+

+ * +

+ *

01384000 Wanaque River at Monks, N.J. 10/1/1934 9/30/1985 * + * * + *

01386000 West Brook near Wanaque, N.J. 10/1/1934 9/30/1978 * * * * * *

01386500 Blue Mine Brook near Wanaque, N.J. 10/1/1934 9/30/1958 * + * * * *01387000 Wanaque R at Wanaque, N.J. 10/1/1928 9/30/2001 * * * * * *
Table 4 53

Table 4.  Results of trend tests on the highest annual n-day flow for the water year ending September 30 and the winter period from November through April at 138streamflow-gaging stations in New Jersey.—Continued[+, significant upward trend; -, significant downward trend; *, no significant trend was detected; USGS, U.S. Geological Survey]

USGS station 

number Station name

Period of record

Kendall Tau trend test

Annual low flow Winter low flow

Begin End 1-day 7-day 30-day 1-day 7-day 30-day

01387000 Wanaque R at Wanaque, N.J. 10/1/1911 9/30/1928 * * * * - -01387400 Ramapo River at Ramapo, N.Y. 10/1/1978 9/30/2001 * * * * * *01387420 Ramapo River at Suffern, N.Y. 10/1/1978 9/30/2001 * * * * * *01387450 Mahwah River near Suffern, N.Y. 10/1/1958 9/30/1995 * * * * * *01387500 Ramapo River near Mahwah, N.J. 10/1/1903 9/30/2001 * * * * * *

01388000 Ramapo River at Pompton Lakes, N.J. 10/1/1921 9/30/2001 * * * * * *01388500 Pompton River at Pompton Plains, N.J. 10/1/1903 9/30/2001 * * * * * *

01389500 Passaic River at Little Falls, N.J. 10/1/1927 9/30/2001 * * * * * *

01389500 Passaic River at Little Falls, N.J. 10/1/1896 9/30/1927 - - - - - -01390500 Saddle R at Ridgewood, N.J. 10/1/1954 9/30/2001 * * * * * *

01391000 Hohokus Brook at Ho-ho-kus, N.J. 10/1/1954 9/30/1996 * * * * * *

01391500 Saddle River at Lodi, N.J. 10/1/1965 9/30/2001 - * * + * *

01391500 Saddle River at Lodi, N.J. 10/1/1923 9/30/1965 * * * * * *01392000 Weasel Bk at Clifton, N.J. 10/1/1951 9/30/1962 * * * * * *

01392000 Weasel Bk at Clifton, N.J. 10/1/1936 9/30/1950 * * * * * *

01392210 Third River at Passaic, N.J. 10/1/1976 9/30/1997 * * * - - *

01392500 Second River at Belleville, N.J. 10/1/1936 9/30/1964 * * * * * *01393450 Elizabeth R at Ursino Lake at Elizabeth, N.J. 10/1/1951 9/30/2001 * * * * * *

01393450 Elizabeth R at Ursino Lake at Elizabeth, N.J. 10/1/1921 9/30/1951 * * * * * *01394000 WB Rahway River at Millburn, N.J. 10/1/1940 9/30/1950 * * * * * *

01394500 Rahway R near Springfield, N.J. 10/1/1938 9/30/2001 + * * * * *01395000 Rahway River at Rahway, N.J. 10/1/1921 9/30/2001 + + * + * *

01396580 Spruce Run at Glen Gardner, N.J. 10/1/1977 9/30/2001 * * * * * *

01396660 Mulhockaway Creek at Van Syckel, N.J. 10/1/1976 9/30/2001 * * * * * *01396800 Spruce Run at Clinton, N.J. 10/1/1963 9/30/2001 * * * * * *

01397000 SB Raritan River at Stanton, N.J. 10/1/1963 9/30/2001 * * * * * *

01397000 SB Raritan River at Stanton, N.J. 10/1/1903 9/30/1963 * * * * * *

01397500 Walnut Brook near Flemington, N.J. 10/1/1935 9/30/1961 * * * * * *
54 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003 Table 4.  Results of trend tests on the highest annual n-day flow for the water year ending September 30 and the winter period from November through April at 138 streamflow-gaging stations in New Jersey.—Continued [+, significant upward trend; -, significant downward trend; *, no significant trend was detected; USGS, U.S. Geological Survey] USGS station number Station name Period of record Kendall Tau trend test Annual low flow Winter low flow Begin End 1-day 7-day 30-day 1-day 7-day 30-day 01398000 Neshanic River at Reaville, N.J. 10/1/1930 9/30/2001

+

+ * * * *

01398045 Back Brook Tributary near Ringoes, N.J. 10/1/1976 9/30/1988 * * * * * *01398107 Holland Brook at Readington, N.J. 10/1/1977 9/30/1996 - * * - * *01398500 NB Raritan River near Far Hills, N.J. 10/1/1921 9/30/2001 * * * * * *01399190 Lamington (Black) River at Succasunna, N.J. 10/1/1976 9/30/1987 * * * * * *

01399200 Lamington (Black) R near Ironia, N.J. 10/1/1940 9/30/1987 * * * * * *01399500 Lamington (Black) River near Pottersville, N.J. 10/1/1921 9/30/2001 * * * * * *

01399510 Upper Cold Brook near Pottersville, N.J. 10/1/1972 9/30/1997 * * * * * *

01399525 Axle Brook near Pottersville, N.J. 10/1/1977 9/30/1989 * - - - - -01399670 SB Rockaway Creek at Whitehouse Station, N.J. 10/1/1976 9/30/2001 * * * - * *

01400000 North Branch Raritan River near Raritan, N.J. 10/1/1923 9/30/2001 * * * * * *

01400300 Peters Brook near Raritan, N.J. 10/1/1977 9/30/1996 * * - * - -

01400350 Macs Brook at Somerville, N.J. 10/1/1981 9/30/1996 - - * - - *01400500 Raritan River at Manville, N.J. 10/1/1963 9/30/2001 * * * * * *

01400500 Raritan River at Manville, N.J. 10/1/1903 9/30/1963 * * * - * *

01400730 Millstone River at Plainsboro, N.J. 10/1/1963 9/30/1990 * +

+ * * *

01401000 Stony Brook at Princeton, N.J. 10/1/1953 9/30/2001 * * * * + *

01401500 Millstone R near Kingston, N.J. 10/1/1933 9/30/1949 * * * * * *01401650 Pike Run at Belle Mead, N.J. 10/1/1979 9/30/2001 * * * * * *

01403060 Raritan River below Calco Dam at Bound Brook, N.J. 10/1/1963 9/30/2001 * * * - * *

01403060 Raritan River below Calco Dam at Bound Brook, N.J. 10/1/1902 9/30/1963 * * * - * *

01403150 West Branch Middle Brook near Martinsville, N.J. 10/1/1978 9/30/2001 * * * * * *01403400 Green Brook at Seeley Mills, N.J. 10/1/1978 9/30/2001 * * * - * *

01403500 Green Brook at Plainfield, N.J. 10/1/1938 9/30/1985

+

+

+

+

+

+

01403535 EB Stony Brook at Best Lake at Watchung, N.J. 10/1/1979 9/30/2001 * * * * * *

01403540 Stony Brook at Watchung, N.J. 10/1/1974 9/30/2001 * * * * - *

01405000 Lawrence Brook at Farrington Dam, N.J. 10/1/1926 9/30/1990 * * * * * *01405030 Lawrence Bk at Westons Mills, N.J. 10/1/1988 9/30/2001 * * * * * *
Table 4 55

Table 4.  Results of trend tests on the highest annual n-day flow for the water year ending September 30 and the winter period from November through April at 138streamflow-gaging stations in New Jersey.—Continued[+, significant upward trend; -, significant downward trend; *, no significant trend was detected; USGS, U.S. Geological Survey]

USGS station 

number Station name

Period of record

Kendall Tau trend test

Annual low flow Winter low flow

Begin End 1-day 7-day 30-day 1-day 7-day 30-day

01405300 Matchaponix Brook at Spotswood, N.J. 10/1/1956 9/30/1967 * * - * * *01405400 Manalapan Brook at Spotswood, N.J. 10/1/1956 9/30/2001 * * * * * *01405500 South River at Old Bridge, N.J. 10/1/1938 9/30/1989 * * * * + *01407000 Matawan C at Matawan, N.J. 10/1/1931 9/30/1955 * * * * * *01407500 Swimming River near Red Bank, N.J. 10/1/1921 9/30/2001 + * * * * *01407705 Shark River near Neptune City, N.J. 10/1/1966 9/30/2001 * * * * * *

01407760 Jumping Brook near Neptune City, N.J. 10/1/1966 9/30/2001 * * * * * *01408000 Manasquan River at Squankum, N.J. 10/1/1931 9/30/2001 * * * * * *

01408029 Manasquan R near Allenwood, N.J. 10/1/1989 9/30/2001 * * * * * *

01408120 North Branch Metedeconk River near Lakewood, N.J. 10/1/1972 9/30/2001 * * * * * *

01408500 Toms River near Toms River, N.J. 10/1/1966 9/30/2001 * * * * * *

01408500 Toms River near Toms River, N.J. 10/1/1928 9/30/1966 * * * * * *01409000 Cedar Creek at Lanoka Harbor, N.J. 10/1/1931 9/30/1971 * * * * * *

01409095 Oyster Creek near Brookville, N.J. 10/1/1964 9/30/1985 * * * * + *01409500 Batsto River at Batsto, N.J. 10/1/1927 9/30/2001 * * * * * *

01409810 West Branch Wading River near Jenkins, N.J. 10/1/1974 9/30/1997 * * * * * *01410000 Oswego River at Harrisville, N.J. 10/1/1930 9/30/2001 * * * * * *

01410150 East Branch Bass River near New Gretna, N.J. 10/1/1977 9/30/2001 * * * * * *01410500 Absecon Creek at Absecon, N.J. 10/1/1945 9/30/1985 * * * * * *

01411000 Great Egg Harbor River at Folsom, N.J. 10/1/1924 9/30/2001 + * * + * *

01411300 Tuckahoe River at Head Of River, N.J. 10/1/1969 9/30/2001 * * * * * *

01411456 Little Ease Rn near Clayton, N.J. 10/1/1987 9/30/2001 * * * * * *01411500 Maurice River at Norma, N.J. 10/1/1932 9/30/2001 * * * * * *

01412000 Menantico Creek near Millville, N.J. 10/1/1930 9/30/1985 * * * * * *

01412500 WB Cohansey River at Seeley, N.J. 10/1/1950 9/30/1967 - - * - - *
56 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003 Table 4.  Results of trend tests on the highest annual n-day flow for the water year ending September 30 and the winter period from November through April at 138 streamflow-gaging stations in New Jersey.—Continued [+, significant upward trend; -, significant downward trend; *, no significant trend was detected; USGS, U.S. Geological Survey] USGS station number Station name Period of record Kendall Tau trend test Annual low flow Winter low flow Begin End 1-day 7-day 30-day 1-day 7-day 30-day 01412800 Cohansey River at Seeley, N.J. 10/1/1977 9/30/1988 * * * * * * 01434000 Delaware River at Port Jervis, N.Y. 10/1/1954 9/30/2001 * * * * * * 01434000 Delaware River at Port Jervis, N.Y. 10/1/1904 9/30/1954 * * - * * - 01437500 Neversink River at Godeffroy, N.Y. 10/1/1954 9/30/2001 * * * * * * 01437500 Neversink River at Godeffroy, N.Y. 10/1/1937 9/30/1954 * * * * * * 01438500 Delaware River at Montague, N.J. 10/1/1954 9/30/2001 * * * * * * 01438500 Delaware River at Montague, N.J. 10/1/1939 9/30/1954 * * * * * * 01440000 Flat Brook near Flatbrookville, N.J. 10/1/1923 9/30/2001 * * * * * * 01440200 Delaware River near Delaware Water Gap, Pa. 10/1/1963 9/30/1996 * * * * * * 01443500 Paulins Kill at Blairstown, N.J. 10/1/1921 9/30/2001 * * * * * * 01443900 Yards Creek near Blairstown, N.J. 10/1/1966 9/30/2001 * * * * * * 01445000 Pequest River at Huntsville, N.J. 10/1/1939 9/30/1962 * * * * * * 01446500 Delaware River at Belvidere, N.J. 10/1/1954 9/30/2001 * * * * * * 01446500 Delaware River at Belvidere, N.J. 10/1/1922 9/30/1954 * * * * * * 01453000 Lehigh River at Bethlehem, Pa. 10/1/1902 9/30/1990 * * * * * *

01455200 Pohatcong Creek at New Village, N.J. 10/1/1959 9/30/1969 * * - - - -01455500 Musconetcong R at out of Lake Hopatcong, N.J. 10/1/1927 9/30/1976 * * +

+

+

+

01456000 Musconetcong R near Hackettstown, N.J. 10/1/1921 9/30/1974 * * * * * *

01457000 Musconetcong River near Bloomsbury, N.J. 10/1/1903 9/30/2001

+

+ * * * *

01457500 Delaware R at Riegelsville, N.J. 10/1/1954 9/30/1971 - - * * * *

01457500 Delaware R at Riegelsville, N.J. 10/1/1905 9/30/1954 * * * * * *

01460440 Delaware and Raritan Ca at Port Mercer, N.J. 10/1/1989 9/30/2001 * * * * * *

01460500 Delaware and Raritan Canal at Kingston, N.J. 10/1/1946 9/30/1992

+

+

+

+

+

+

01463500 Delaware River at Trenton, N.J. 10/1/1954 9/30/2001 * * * * * *

01463500 Delaware River at Trenton, N.J. 10/1/1912 9/30/1954 * * * * * *
Table 4 57

Table 4.  Results of trend tests on the highest annual n-day flow for the water year ending September 30 and the winter period from November through April at 138streamflow-gaging stations in New Jersey.—Continued[+, significant upward trend; -, significant downward trend; *, no significant trend was detected; USGS, U.S. Geological Survey]

USGS station 

number Station name

Period of record

Kendall Tau trend test

Annual low flow Winter low flow

Begin End 1-day 7-day 30-day 1-day 7-day 30-day

01464000 Assunpink Creek at Trenton, N.J. 10/1/1954 9/30/2001 * * * * * *01464000 Assunpink Creek at Trenton, N.J. 10/1/1923 9/30/1954 * * * * * *01464500 Crosswicks Creek at Extonville, N.J. 10/1/1939 9/30/2001 + * * * * *

01465850 SB Rancocas C at Vincentown, N.J. 10/1/1960 9/30/2001 * * * * * *01466000 MB Mt Misery Bk in Lebanon State Forest, N.J. 10/1/1952 9/30/1977 * * * * * *

01466500 McDonalds Branch in Lebanon State Forest, N.J. 10/1/1953 9/30/2001 * * * * * *01467000 North Branch Rancocas Creek at Pemberton, N.J. 10/1/1921 9/30/2001 * * * * * *

01467081 South Branch Pennsauken Creek at Cherry Hill, N.J. 10/1/1967 9/30/2001 * * * * * *01467150 Cooper River at Haddonfield, N.J. 10/1/1987 9/30/2001 * * * * * *

01475000 Mantua Creek at Pitman, N.J. 10/1/1939 9/30/1977 + + * + + *

01477120 Raccoon Creek near Swedesboro, N.J. 10/1/1965 9/30/2001 * * * * * *

01482500 Salem River at Woodstown, N.J. 10/1/1939 9/30/1990 * * * * * *01483000 Alloway Creek at Alloway, N.J. 10/1/1952 9/30/1973 * * * * * *

Appendix 1
Table 1-1.  Index, by station identification number, of selected continuous-record streamflow-gaging stations, low-flow partial-record

stations, and gaging stations analyzed as a partial-record stations in New Jersey, New York, and Pennsylvania.—Continued

[Stations are listed in downstream order; ID, identification number]

Station ID Station name Station type Regulation

Watershed 

Management Area

01367620 Wallkill River at outflow of Lake Mohawk at Sparta, N.J. Low-flow partial-record station 02

01367700 Wallkill River at Franklin, N.J. Low-flow partial-record station 02

01367750 Beaver Run near Hamburg, N.J. Low-flow partial-record station 02

01367770 Wallkill River near Sussex, N.J. Low-flow partial-record station 02

01367800 Papakating Creek at Pellettown, N.J. Low-flow partial-record station 02

01367850 West Branch Papakating Creek at McCoys Corner, N.J. Low-flow partial-record station 02

01367890 Clove Brook above Clove Acres Lake, at Sussex, N.J. Low-flow partial-record station 02

01367900 Clove Brook at Sussex, N.J. Low-flow partial-record station 02

01367910 Papakating Creek at Sussex, N.J. Low-flow partial-record station 02

01368000 Wallkill River near Unionville, N.Y. Continuous-record gaging station 02

01368810 Wawayanda Creek at New Milford, N.Y. Low-flow partial-record station 23

01368820 Double Kill at Wawayanda, N.J. Low-flow partial-record station 02

01368840 Double Kill at New Milford, N.Y. Low-flow partial-record station 23

01368950 Black Creek near Vernon, N.J. Low-flow partial-record station 02

01369000 Pochuck Creek near Pine Island, N.Y. Continuous-record gaging station 23

01376800 Hackensack River at West Nyack, N.Y. Continuous-record gaging station Yes 25

01377000 Hackensack River at Rivervale, N.J. Continuous-record gaging station Yes 05

01377300 Pascack Brook at Pearl River, N.Y. Low-flow partial-record station 25

01377475 Musquapsink Brook near Westwood, N.J. Low-flow partial-record station 05

01377500 Pascack Brook at Westwood, N.J. Continuous-record gaging station Yes 05

01378350 Tenakill Brook at Cresskill, N.J. Low-flow partial-record station 05

01378385 Tenakill Brook at Closter, N.J. Low-flow partial-record station 05

01378410 Dwars Kill at Norwood, N.J. Low-flow partial-record station 05

01378430 Norwood Brook at Norwood, N.J. Low-flow partial-record station 05

01378500 Hackensack River at New Milford, N.J. Continuous-record gaging station Yes 05

01378520 Hirshfeld Brook at New Milford, N.J. Low-flow partial-record station 05

01378530 French Brook at New Bridge, N.J. Low-flow partial-record station 05

01378560 Coles Brook at Hackensack, N.J. Low-flow partial-record station 05

01378590 Metzler Brook at Englewood, N.J. Low-flow partial-record station 05

01378615 Wolf Creek at Ridgefield, N.J. Low-flow partial-record station 05

01378690 Passaic River near Bernardsville, N.J. Gaging station analyzed as a 

partial-record station

06

01378700 Passaic River at outlet of Osborn Pond, N.J. Low-flow partial-record station 06

01378750 Great Brook at Green Village, N.J. Low-flow partial-record station 06

01378800 Primrose Brook near New Vernon, N.J. Low-flow partial-record station 06

01378850 Great Brook near Basking Ridge, N.J. Low-flow partial-record station 06

01378900 Black Brook near Meyersville, N.J. Low-flow partial-record station 06

01379000 Passaic River near Millington, N.J. Continuous-record gaging station Yes 06

60 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Table 1-1.  Index, by station identification number, of selected continuous-record streamflow-gaging stations, low-flow partial-record

stations, and gaging stations analyzed as a partial-record stations in New Jersey, New York, and Pennsylvania.—Continued

[Stations are listed in downstream order; ID, identification number]

Station ID Station name Station type Regulation

Watershed 

Management Area

01379150 Harrisons Brook at Liberty Corner, N.J. Low-flow partial-record station 06

01379200 Dead River near Millington, N.J. Low-flow partial-record station 06

01379300 Passaic River at Stirling, N.J. Low-flow partial-record station 06

01379500 Passaic River near Chatham, N.J. Continuous-record gaging station Yes 06

01379525 Canoe Brook near Millburn, N.J. Low-flow partial-record station 06

01379570 Passaic River at Hanover, N.J. Low-flow partial-record station 06

01379630 Russia Brook Tributary at Milton, N.J. Gaging station analyzed as a 

partial-record station

06

01379700 Rockaway River at Berkshire Valley, N.J. Gaging station analyzed as a 

partial-record station

06

01379750 Rockaway River at Dover, N.J. Low-flow partial-record station 06

01379773 Green Pond Brook at Picatinny Arsenal, N.J. Gaging station analyzed as a 

partial-record station

06

01379780 Green Pond Brook below Picatinny Lk at Picatinny Arsenal, N.J. Gaging station analyzed as a 

partial-record station

Yes 06

01379790 Green Pond Brook at Wharton, N.J. Gaging station analyzed as a 

partial-record station

06

01380000 Beaver Brook at outlet of Splitrock Res, N.J. Continuous-record gaging station Yes 06

01380050 Hibernia Brook at outlet of Lake Telemark, N.J. Low-flow partial-record station 06

01380100 Beaver Brook at Rockaway, N.J. Low-flow partial-record station 06

01380300 Stony Brook near Rockaway Valley, N.J. Low-flow partial-record station 06

01380500 Rockaway River above Reservoir at Boonton, N.J. Continuous-record gaging station 06

01381000 Rockaway River below Reservoir at Boonton, N.J. Continuous-record gaging station Yes 06

01381150 Crooked Brook near Boonton, N.J. Low-flow partial-record station 06

01381200 Rockaway River at Pine Brook, N.J. Low-flow partial-record station 06

01381400 Whippany River near Morristown, N.J. Gaging station analyzed as a 

partial-record station

06

01381470 Jaquis Brook at Greystone Park State Hospital, N.J. Low-flow partial-record station 06

01381490 Watnong Brook at Morris Plains, N.J. Low-flow partial-record station 06

01381500 Whippany River at Morristown, N.J. Continuous-record gaging station 06

01381550 Malapardis Brook at Whippany, N.J. Low-flow partial-record station 06

01381600 Whippany River near Whippany, N.J. Low-flow partial-record station 06

01381700 Troy Brook at Troy Hills, N.J. Low-flow partial-record station 06

01381750 West Brook at Troy Hills, N.J. Low-flow partial-record station 06

01381800 Whippany River near Pine Brook, N.J. Gaging station analyzed as a 

partial-record station

06

01381900 Passaic River at Pine Brook, N.J. Low-flow partial-record station Yes 06

01382000 Passaic River at Two Bridges, N.J. Low-flow partial-record station 06

01382050 Pequannock River near Stockholm, N.J. Low-flow partial-record station 03

01382360 Kanouse Brook at Newfoundland, N.J. Low-flow partial-record station 03

Appendix 1 61
Table 1-1.  Index, by station identification number, of selected continuous-record streamflow-gaging stations, low-flow partial-record

stations, and gaging stations analyzed as a partial-record stations in New Jersey, New York, and Pennsylvania.—Continued

[Stations are listed in downstream order; ID, identification number]

Station ID Station name Station type Regulation

Watershed 

Management Area

01382450 Macopin River at Macopin Reservoir, N.J. Low-flow partial-record station 03

01382500 Pequannock River at Macopin Intake Dam, N.J. Continuous-record gaging station Yes 03

01382550 Pequannock River Tributary 1 at Kinnelon, N.J. Low-flow partial-record station 03

01382700 Stone House Brook at Kinnelon, N.J. Low-flow partial-record station 03

01382800 Pequannock River at Riverdale, N.J. Gaging station analyzed as a 

partial-record station

03

01382870 Belcher Creek at Stowaway Road at West Milford, N.J. Low-flow partial-record station 03

01382880 Belcher Creek Tributary at West Milford, N.J. Low-flow partial-record station 03

01382890 Belcher Creek at West Milford, N.J. Low-flow partial-record station 03

01382910 Morsetown Brook at West Milford, N.J. Low-flow partial-record station 03

01382960 Green Brook near West Milford, N.J. Low-flow partial-record station 03

01382990 Cooley Brook near West Milford, N.J. Low-flow partial-record station 03

01383500 Wanaque River at Awosting, N.J. Continuous-record gaging station Yes 03

01384000 Wanaque River at Monks, N.J. Continuous-record gaging station Yes 03

01384500 Ringwood Creek near Wanaque, N.J. Continuous-record gaging station 03

01385000 Cupsaw Brook near Wanaque, N.J. Continuous-record gaging station 03

01385500 Erskine Brook near Wanaque, N.J. Gaging station analyzed as a 

partial-record station

03

01386000 West Brook near Wanaque, N.J. Continuous-record gaging station 03

01386500 Blue Mine Brook near Wanaque, N.J. Continuous-record gaging station 03

01387000 Wanaque River at Wanaque, N.J. Continuous-record gaging station Yes 03

01387400 Ramapo River at Ramapo, N.Y. Continuous-record gaging station Yes 24

01387420 Ramapo River at Suffern, N.Y. Continuous-record gaging station Yes 24

01387450 Mahwah River near Suffern, N.Y. Continuous-record gaging station 24

01387480 Mahwah River at Suffern, N.Y. Low-flow partial-record station 24

01387490 Masonicus Brook at West Mahwah, N.J. Low-flow partial-record station 03

01387500 Ramapo River near Mahwah, N.J. Continuous-record gaging station 03

01387520 Stag Brook near Mahwah, N.J. Low-flow partial-record station 03

01387600 Darlington Brook near Darlington, N.J. Low-flow partial-record station 03

01387670 Ramapo River near Darlington, N.J. Low-flow partial-record station 03

01387700 Bear Swamp Brook near Oakland, N.J. Low-flow partial-record station 03

01387884 Pond Brook at US Route 202 at Oakland, N.J. Low-flow partial-record station 03

01387930 Ramapo River Tributary No. 5 at Oakland, N.J. Low-flow partial-record station 03

01387950 Acid Brook at Pompton Lakes, N.J. Low-flow partial-record station 03

01387980 Haycock Brook at Pompton Lakes, N.J. Low-flow partial-record station 03

01388000 Ramapo River at Pompton Lakes, N.J. Continuous-record gaging station Yes 03

01388500 Pompton River at Pompton Plains, N.J. Continuous-record gaging station Yes 03

62 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Table 1-1.  Index, by station identification number, of selected continuous-record streamflow-gaging stations, low-flow partial-record

stations, and gaging stations analyzed as a partial-record stations in New Jersey, New York, and Pennsylvania.—Continued

[Stations are listed in downstream order; ID, identification number]

Station ID Station name Station type Regulation

Watershed 

Management Area

01388700 Beaver Dam Brook at Lincoln Park, N.J. Low-flow partial-record station 03

01388720 Beaver Dam Brook at Ryerson Road, at Lincoln Park, N.J. Low-flow partial-record station 03

01389000 Pompton River at Two Bridges, N.J. Low-flow partial-record station 06

01389100 Singac Brook at Singac, N.J. Low-flow partial-record station 04

01389110 Passaic River at Route 46, at Singac, N.J. Low-flow partial-record station 04

01389140 Deepavaal Brook at Two Bridges, N.J. Low-flow partial-record station 04

01389500 Passaic River at Little Falls, N.J. Continuous-record gaging station Yes 04

01389534 Peckman River at Ozone Avenue, at Verona, N.J. Low-flow partial-record station 04

01389600 Peckman River at West Paterson, N.J. Low-flow partial-record station 04

01389765 Molly Ann Brook at North Haledon, N.J. Low-flow partial-record station 04

01389790 Molly Ann Brook at Paterson, N.J. Low-flow partial-record station 04

01389850 Goffle Brook at Hawthorne, N.J. Low-flow partial-record station 04

01389905 Fleischer Brook at Elmwood Park, N.J. Low-flow partial-record station 04

01390450 Saddle River at Upper Saddle River, N.J. Low-flow partial-record station 04

01390500 Saddle River at Ridgewood, N.J. Continuous-record gaging station 04

01390700 Hohokus Brook at Wyckoff, N.J. Low-flow partial-record station 04

01390800 Valentine Brook at Allendale, N.J. Low-flow partial-record station 04

01390900 Ramsey Brook at Allendale, N.J. Low-flow partial-record station 04

01391000 Hohokus Brook at Ho-Ho-Kus, N.J. Continuous-record gaging station 04

01391110 Saddle River at Paramus, N.J. Low-flow partial-record station 04

01391485 Sprout Brook at Rochelle Park, N.J. Low-flow partial-record station 04

01391500 Saddle River at Lodi, N.J. Continuous-record gaging station Yes 04

01392000 Weasel Brook at Clifton, N.J. Continuous-record gaging station Yes 04

01392200 Third River at Nutley, N.J. Low-flow partial-record station 04

01392210 Third River at Passaic, N.J. Continuous-record gaging station 04

01392500 Second River at Belleville, N.J. Continuous-record gaging station 04

01393000 Elizabeth River at Irvington, N.J. Gaging station analyzed as a 

partial-record station

07

01393200 Elizabeth River below Chancellor Avenue Bridge at 

Irvington, N.J.

Low-flow partial-record station 07

01393350 West Branch Elizabeth River near Union, N.J. Low-flow partial-record station 07

01393450 Elizabeth River at Ursino Lake at Elizabeth, N.J. Continuous-record gaging station Yes 07

01393800 East Fork East Branch Rahway River at West Orange, N.J. Gaging station analyzed as a 

partial-record station

07

01393890 East Branch Rahway River at Maplewood, N.J. Low-flow partial-record station 07

01394000 West Branch Rahway River at Millburn, N.J. Gaging station analyzed as a 

partial-record station

Yes 07

01394400 Van Winkle Brook at Springfield, N.J. Low-flow partial-record station 07

01394500 Rahway River near Springfield, N.J. Continuous-record gaging station Yes 07

Appendix 1 63
Table 1-1.  Index, by station identification number, of selected continuous-record streamflow-gaging stations, low-flow partial-record

stations, and gaging stations analyzed as a partial-record stations in New Jersey, New York, and Pennsylvania.—Continued

[Stations are listed in downstream order; ID, identification number]

Station ID Station name Station type Regulation

Watershed 

Management Area

01394600 Nomahegan Brook near Mountainside, N.J. Low-flow partial-record station 07

01395000 Rahway River at Rahway, N.J. Continuous-record gaging station Yes 07

01395500 Robinsons Branch at Goodmans, N.J. Gaging station analyzed as a 

partial-record station

07

01396000 Robinsons Branch at Rahway, N.J. Continuous-record gaging station 07

01396030 South Branch Rahway River at Colonia, N.J. Low-flow partial-record station 07

01396070 South Branch Raritan River Tributary 6 at Budd Lake, N.J. Low-flow partial-record station 08

01396080 South Branch Raritan River Tributary 7 at Budd Lake, N.J. Low-flow partial-record station 08

01396090 South Branch Raritan River at outlet of Budd Lake, N.J. Low-flow partial-record station 08

01396120 South Branch Raritan River at Bartley, N.J. Low-flow partial-record station 08

01396180 Drakes Brook at Bartley, N.J. Low-flow partial-record station 08

01396190 South Branch Raritan River at Four Bridges, N.J. Gaging station analyzed as a 

partial-record station

08

01396220 Stony Brook at Naughright, N.J. Low-flow partial-record station 08

01396240 Electric Brook at Long Valley, N.J. Low-flow partial-record station 08

01396280 South Branch Raritan River at Middle Valley, N.J. Low-flow partial-record station 08

01396350 South Branch Raritan River at Califon, N.J. Low-flow partial-record station 08

01396500 South Branch Raritan River near High Bridge, N.J. Continuous-record gaging station 08

01396535 South Branch Raritan River at Arch Street at High Bridge, N.J. Low-flow partial-record station 08

01396550 Spruce Run at Newport, N.J. Low-flow partial-record station 08

01396580 Spruce Run at Glen Gardner, N.J. Continuous-record gaging station 08

01396588 Spruce Run near Glen Gardner, N.J. Low-flow partial-record station 08

01396590 Spruce Run near High Bridge, N.J. Low-flow partial-record station 08

01396600 Spruce Run near Clinton, N.J. Low-flow partial-record station 08

01396660 Mulhockaway Creek at Van Syckel, N.J. Continuous-record gaging station 08

01396670 Mulhockaway Creek Tributary at Van Syckel, N.J. Low-flow partial-record station 08

01396700 Mulhockaway Creek near Clinton, N.J. Low-flow partial-record station 08

01396800 Spruce Run at Clinton, N.J. Continuous-record gaging station Yes 08

01396865 Sidney Brook at Grandin, N.J. Low-flow partial-record station 08

01396900 Capoolong Creek at Lansdowne, N.J. Low-flow partial-record station 08

01397000 South Branch Raritan River at Stanton, N.J. Continuous-record gaging station Yes 08

01397100 Prescott Brook at Round Valley, N.J. Low-flow partial-record station 08

01397290 Assiscong Creek at Bartles Corners, N.J. Low-flow partial-record station 08

01397500 Walnut Brook near Flemington, N.J. Continuous-record gaging station 08

01397800 Neshanic River near Flemington, N.J. Low-flow partial-record station 08

01397900 Third Neshanic River near Ringoes, N.J. Low-flow partial-record station 08

01398000 Neshanic River at Reaville, N.J. Continuous-record gaging station 08

64 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Table 1-1.  Index, by station identification number, of selected continuous-record streamflow-gaging stations, low-flow partial-record

stations, and gaging stations analyzed as a partial-record stations in New Jersey, New York, and Pennsylvania.—Continued

[Stations are listed in downstream order; ID, identification number]

Station ID Station name Station type Regulation

Watershed 

Management Area

01398045 Back Brook Tributary near Ringoes, N.J. Gaging station analyzed as a 

partial-record station

Yes 08

01398052 Back Brook near Reaville, N.J. Low-flow partial-record station 08

01398075 Pleasant Run at Centerville, N.J. Low-flow partial-record station 08

01398102 South Branch Raritan River at South Branch, N.J. Low-flow partial-record station 08

01398107 Holland Brook at Readington, N.J. Gaging station analyzed as a 

partial-record station

Yes 08

01398220 India Brook near Mendham, N.J. Low-flow partial-record station 08

01398260 North Branch Raritan River near Chester, N.J. Low-flow partial-record station 08

01398300 Dawsons Brook near Ironia, N.J. Low-flow partial-record station 08

01398360 Burnett Brook near Chester, N.J. Low-flow partial-record station 08

01398500 Nb Raritan River near Far Hills, N.J. Continuous-record gaging station 08

01398700 Peapack Brook at Gladstone, N.J. Low-flow partial-record station 08

01398850 Peapack Brook at Far Hills, N.J. Low-flow partial-record station 08

01398950 Mine Brook at Far Hills, N.J. Low-flow partial-record station 08

01399100 Middle Brook at Burnt Mills, N.J. Low-flow partial-record station 08

01399120 North Branch Raritan River at Burnt Mills, N.J. Low-flow partial-record station 08

01399190 Lamington (Black) River at Succasunna, N.J. Gaging station analyzed as a 

partial-record station

Yes 08

01399194 Succasunna Brook near Succasunna, N.J. Low-flow partial-record station 08

01399200 Lamington (Black) River near Ironia, N.J. Gaging station analyzed as a 

partial-record station

08

01399295 Tanners Brook near Milltown, N.J. Low-flow partial-record station 08

01399300 Lamington River at Milltown, N.J. Low-flow partial-record station 08

01399500 Lamington (Black) River near Pottersville, N.J. Continuous-record gaging station 08

01399510 Upper Cold Brook near Pottersville, N.J. Continuous-record gaging station 08

01399525 Axle Brook near Pottersville, N.J. Gaging station analyzed as a 

partial-record station

08

01399540 Cold Brook at Oldwick, N.J. Low-flow partial-record station 08

01399570 Rockaway Creek at McCrea Mills, N.J. Low-flow partial-record station 08

01399600 South Branch Rockaway Creek tributary at Lebanon, N.J. Low-flow partial-record station 08

01399670 South Branch Rockaway Creek at Whitehouse Station, N.J. Continuous-record gaging station 08

01399690 South Branch Rockaway Creek at Whitehouse, N.J. Low-flow partial-record station 08

01399700 Rockaway Creek at Whitehouse, N.J. Gaging station analyzed as a 

partial-record station

08

01399820 Chambers Brook near North Branch, N.J. Low-flow partial-record station 08

01399830 North Branch Raritan River at North Branch, N.J. Gaging station analyzed as a 

partial-record station

08

01399900 Chambers Brook at North Branch Depot, N.J. Low-flow partial-record station 08

01400000 North Branch Raritan River near Raritan, N.J. Continuous-record gaging station 08

Appendix 1 65
Table 1-1.  Index, by station identification number, of selected continuous-record streamflow-gaging stations, low-flow partial-record

stations, and gaging stations analyzed as a partial-record stations in New Jersey, New York, and Pennsylvania.—Continued

[Stations are listed in downstream order; ID, identification number]

Station ID Station name Station type Regulation

Watershed 

Management Area

01400300 Peters Brook near Raritan, N.J. Gaging station analyzed as a 

partial-record station

Yes 10

01400350 Macs Brook at Somerville, N.J. Gaging station analyzed as a 

partial-record station

10

01400500 Raritan River at Manville, N.J. Continuous-record gaging station Yes 09

01400540 Millstone River near Manalapan, N.J. Low-flow partial-record station 10

01400560 Millstone River at Applegarth, N.J. Low-flow partial-record station 10

01400580 Millstone River at Hightstown, N.J. Low-flow partial-record station 10

01400593 Rocky Brook at Hightstown, N.J. Low-flow partial-record station 10

01400596 Peddie Brook at Hightstown, N.J. Low-flow partial-record station 10

01400600 Millstone River at Locust Corner, N.J. Low-flow partial-record station 10

01400640 Millstone River near Grovers Mill, N.J. Low-flow partial-record station 10

01400670 Cranbury Brook at Old Church, N.J. Low-flow partial-record station 10

01400700 Cranbury Brook at Cranbury Station, N.J. Low-flow partial-record station 10

01400725 Cranbury Brook at Plainsboro, N.J. Low-flow partial-record station 10

01400730 Millstone River at Plainsboro, N.J. Gaging station analyzed as a 

partial-record station

10

01400750 Bear Brook near Hickory Corner, N.J. Low-flow partial-record station 10

01400770 Little Bear Brook at Hickory Corner, N.J. Low-flow partial-record station 10

01400800 Bear Brook near Grovers Mill, N.J. Low-flow partial-record station 10

01400810 Bear Brook at Princeton Junction, N.J. Low-flow partial-record station 10

01400850 Woodsville Brook at Woodsville, N.J. Low-flow partial-record station 10

01400900 Stony Brook at Glenmoore, N.J. Low-flow partial-record station 10

01400930 Baldwins Creek at Pennington, N.J. Low-flow partial-record station 10

01400932 Baldwins Creek at Baldwin Lake near Pennington, N.J. Gaging station analyzed as a 

partial-record station

10

01400947 Stony Brook at Pennington, N.J. Low-flow partial-record station 10

01400953 Honey Branch near Pennington, N.J. Gaging station analyzed as a 

partial-record station

10

01400970 Honey Branch near Rosedale, N.J. Low-flow partial-record station 10

01401000 Stony Brook at Princeton, N.J. Continuous-record gaging station 10

01401100 Stony Brook at Clarksville, N.J. Low-flow partial-record station 10

01401200 Duck Pond Run at Clarksville, N.J. Low-flow partial-record station 10

01401301 Millstone River at Carnegie Lake at Princeton, N.J. Gaging station analyzed as a 

partial-record station

10

01401400 Heathcote Brook at Kingston, N.J. Low-flow partial-record station 10

01401500 Millstone River near Kingston, N.J. Gaging station analyzed as a 

partial-record station

Yes 10

01401520 Beden Brook near Hopewell, N.J. Low-flow partial-record station 10

01401590 Rock Brook at Blawenburg, N.J. Low-flow partial-record station 10

66 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Table 1-1.  Index, by station identification number, of selected continuous-record streamflow-gaging stations, low-flow partial-record

stations, and gaging stations analyzed as a partial-record stations in New Jersey, New York, and Pennsylvania.—Continued

[Stations are listed in downstream order; ID, identification number]

Station ID Station name Station type Regulation

Watershed 

Management Area

01401600 Beden Brook near Rocky Hill, N.J. Low-flow partial-record station 10

01401650 Pike Run at Belle Mead, N.J. Continuous-record gaging station 10

01401700 Pike Run near Rocky Hill, N.J. Low-flow partial-record station 10

01401800 Ten Mile Run near Blackwells Mills, N.J. Low-flow partial-record station 10

01401900 Six Mile Run at Blackwells Mills, N.J. Low-flow partial-record station 10

01402000 Millstone River at Blackwells Mills, N.J. Continuous-record gaging station Yes 10

01402590 Royce Brook Tributary at Frankfort, N.J. Gaging station analyzed as a 

partial-record station

10

01402600 Royce Brook Tributary near Belle Mead, N.J. Continuous-record gaging station 10

01402700 Royce Brook at Manville, N.J. Low-flow partial-record station 10

01403060 Raritan River below Calco Dam at Bound Brook, N.J. Continuous-record gaging station Yes 09

01403100 East Branch Middle Brook at Martinsville, N.J. Low-flow partial-record station 09

01403150 West Branch Middle Brook near Martinsville, N.J. Continuous-record gaging station Yes 09

01403160 West Branch Middle Brook near Somerville, N.J. Gaging station analyzed as a 

partial-record station

09

01403330 Bound Brook at South Plainfield, N.J. Low-flow partial-record station 09

01403350 Cedar Brook at South Plainfield, N.J. Low-flow partial-record station 09

01403385 Bound Brook at Route 28 at Middlesex, N.J. Low-flow partial-record station 09

01403395 Blue Brook at Seeleys Pond Dam near Berkeley Heights, N.J. Low-flow partial-record station 09

01403400 Green Brook at Seeley Mills, N.J. Continuous-record gaging station 09

01403500 Green Brook at Plainfield, N.J. Continuous-record gaging station Yes 09

01403535 East Branch Stony Brook at Best Lake at Watchung, N.J. Continuous-record gaging station 09

01403540 Stony Brook at Watchung, N.J. Continuous-record gaging station 09

01403900 Bound Brook at Middlesex, N.J. Gaging station analyzed as a 

partial-record station

09

01404060 Ambrose Brook at Middlesex, N.J. Low-flow partial-record station 09

01404180 Mill Brook at Highland Park, N.J. Low-flow partial-record station 09

01404300 Lawrence Brook at outlet of Davidsons Mill Pond, N.J. Low-flow partial-record station 09

01404400 Oakeys Brook near Patricks Corner, N.J. Low-flow partial-record station 09

01404470 Ireland Brook at Patricks Corner, N.J. Low-flow partial-record station 09

01404500 Lawrence Brook at Patricks Corner, N.J. Gaging station analyzed as a 

partial-record station

09

01404700 Beaverdam Brook near Patricks Corner, N.J. Low-flow partial-record station 09

01405000 Lawrence Brook at Farrington Dam, N.J. Continuous-record gaging station Yes 09

01405030 Lawrence Brook at Westons Mills, N.J. Continuous-record gaging station Yes 09

01405170 Milford Brook at Englishtown, N.J. Low-flow partial-record station 09

01405180 Mcgellairds Brook at Englishtown, N.J. Low-flow partial-record station 09

01405210 Pine Brook at Clarks Mills, N.J. Low-flow partial-record station 09

01405240 Matchaponix Brook near Englishtown, N.J. Low-flow partial-record station 09

Appendix 1 67
Table 1-1.  Index, by station identification number, of selected continuous-record streamflow-gaging stations, low-flow partial-record

stations, and gaging stations analyzed as a partial-record stations in New Jersey, New York, and Pennsylvania.—Continued

[Stations are listed in downstream order; ID, identification number]

Station ID Station name Station type Regulation

Watershed 

Management Area

01405285 Barclay Brook near Englishtown, N.J. Low-flow partial-record station 09

01405290 Matchaponix Brook at Texas, N.J. Low-flow partial-record station 09

01405300 Matchaponix Brook at Spotswood, N.J. Gaging station analyzed as a 

partial-record station

09

01405302 Matchaponix Brook at Mundy Avenue at Spotswood, N.J. Low-flow partial-record station 09

01405335 Manalapan Brook near Manalapan, N.J. Low-flow partial-record station 09

01405340 Manalapan Brook at Federal Road near Manalapan, N.J. Low-flow partial-record station 09

01405400 Manalapan Brook at Spotswood, N.J. Continuous-record gaging station Yes 09

01405435 Cedar Brook at Spotswood, N.J. Low-flow partial-record station 09

01405440 Manalapan Brook at Bridge Street at Spotswood, N.J. Low-flow partial-record station 09

01405470 Iresick Brook at East Spotswood, N.J. Low-flow partial-record station 09

01405500 South River at Old Bridge, N.J. Continuous-record gaging station Yes 09

01406000 Deep Run near Browntown, N.J. Gaging station analyzed as a 

partial-record station

09

01406040 Deep Run at Route 516, near Old Bridge, N.J. Low-flow partial-record station 09

01406050 Deep Run at Old Bridge, N.J. Gaging station analyzed as a 

partial-record station

09

01406500 Tennent Brook near Browntown, N.J. Gaging station analyzed as a 

partial-record station

09

01407000 Matawan Creek at Matawan, N.J. Continuous-record gaging station Yes 12

01407012 Gravelly Brook at Church Street, at Matawan, N.J. Low-flow partial-record station 12

01407026 Mohingson (Wilkson) Creek at Church Street, at Matawan, N.J. Low-flow partial-record station 12

01407055 East Creek at North Centerville, N.J. Low-flow partial-record station 12

01407065 Mahoras Brook at Hendrickson Corners, N.J. Low-flow partial-record station 12

01407070 Waackaack Creek near Keansburg, N.J. Low-flow partial-record station 12

01407102 Town Brook at Church Street, at New Monmouth, N.J. Low-flow partial-record station 12

01407200 Hop Brook at Holmdel, N.J. Low-flow partial-record station 12

01407250 Willow Brook at Holmdel, N.J. Low-flow partial-record station 12

01407300 Big Brook at Vanderburg, N.J. Low-flow partial-record station 12

01407400 Yellow Brook at Colts Neck, N.J. Low-flow partial-record station 12

01407450 Mine Brook at Colts Neck, N.J. Low-flow partial-record station 12

01407500 Swimming River near Red Bank, N.J. Continuous-record gaging station Yes 12

01407532 Poricy Brook at Red Bank, N.J. Low-flow partial-record station 12

01407618 Whale Pond Brook near Oakhurst, N.J. Low-flow partial-record station 12

01407628 Poplar Brook near Deal, N.J. Low-flow partial-record station 12

01407636 Harvey Brook at West Allenhurst, N.J. Low-flow partial-record station 12

01407700 Shark River at Glendola, N.J. Low-flow partial-record station 12

01407705 Shark River near Neptune City, N.J. Continuous-record gaging station Yes 12

01407755 Jumping Brook above reservior, near Neptune City, N.J. Low-flow partial-record station 12

68 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Table 1-1.  Index, by station identification number, of selected continuous-record streamflow-gaging stations, low-flow partial-record

stations, and gaging stations analyzed as a partial-record stations in New Jersey, New York, and Pennsylvania.—Continued

[Stations are listed in downstream order; ID, identification number]

Station ID Station name Station type Regulation

Watershed 

Management Area

01407760 Jumping Brook near Neptune City, N.J. Continuous-record gaging station Yes 12

01407780 Polly Pond Brook at South Belmar, N.J. Low-flow partial-record station 12

01407800 Wreck Pond Brook near Spring Lake, N.J. Low-flow partial-record station 12

01407806 Hannabrand Brook at Old Mill Road, near Spring Lake 

Heights, N.J.

Low-flow partial-record station 12

01407830 Manasquan River near Georgia, N.J. Low-flow partial-record station 12

01407860 Debois Creek at Adelphia, N.J. Low-flow partial-record station 12

01407900 Manasquan River at West Farms, N.J. Low-flow partial-record station 12

01407970 Timber Swamp Creek near Farmingdale, N.J. Low-flow partial-record station 12

01408000 Manasquan River at Squankum, N.J. Continuous-record gaging station 12

01408015 Mingamahone Brook at Farmingdale, N.J. Low-flow partial-record station 12

01408020 Mingamahone Brook at Squankum, N.J. Low-flow partial-record station 12

01408029 Manasquan River near Allenwood, N.J. Gaging station analyzed as a 

partial-record station

Yes 12

01408030 Manasquan River at Allenwood, N.J. Low-flow partial-record station 12

01408100 North Branch Metedeconk River at Lakewood, N.J. Low-flow partial-record station 13

01408120 North Branch Metedeconk River near Lakewood, N.J. Continuous-record gaging station 13

01408140 South Branch Metedeconk River at Lakewood, N.J. Gaging station analyzed as a 

partial-record station

13

01408150 South Branch Metedeconk River near Lakewood, N.J. Gaging station analyzed as a 

partial-record station

13

01408300 Toms River at Whitesville, N.J. Low-flow partial-record station 13

01408440 Union Brook at Lakehurst, N.J. Low-flow partial-record station 13

01408460 Manapaqua Brook at Lakehurst, N.J. Low-flow partial-record station 13

01408490 Ridgeway Branch near Lakehurst, N.J. Low-flow partial-record station 13

01408500 Toms River near Toms River, N.J. Continuous-record gaging station 13

01408592 Wrangel Brook at Mule Road, near Toms River, N.J. Low-flow partial-record station 13

01408620 Davenport Branch near Dover Forge, N.J. Low-flow partial-record station 13

01408728 Long Swamp Creek at Toms River, N.J. Low-flow partial-record station 13

01408800 Webbs Mill Branch near Whiting, N.J. Low-flow partial-record station 13

01408810 Webbs Mill Branch tributary near Whiting, N.J. Low-flow partial-record station 13

01408830 Cedar Creek at Cedar Crest, N.J. Low-flow partial-record station 13

01409000 Cedar Creek at Lanoka Harbor, N.J. Continuous-record gaging station 13

01409050 North Branch Forked River near Forked River, N.J. Low-flow partial-record station 13

01409080 South Branch Forked River near Forked River, N.J. Low-flow partial-record station 13

01409095 Oyster Creek near Brookville, N.J. Gaging station analyzed as a 

partial-record station

13

01409100 Oyster Creek near Waretown, N.J. Low-flow partial-record station 13

01409150 Mill Creek near Manahawkin, N.J. Low-flow partial-record station 13

Appendix 1 69
Table 1-1.  Index, by station identification number, of selected continuous-record streamflow-gaging stations, low-flow partial-record

stations, and gaging stations analyzed as a partial-record stations in New Jersey, New York, and Pennsylvania.—Continued

[Stations are listed in downstream order; ID, identification number]

Station ID Station name Station type Regulation

Watershed 

Management Area

01409200 Fourmile Branch near Manahawkin, N.J. Low-flow partial-record station 13

01409250 Cedar Run near Manahawkin, N.J. Low-flow partial-record station 13

01409280 Westecunk Creek at Stafford Forge, N.J. Gaging station analyzed as a 

partial-record station

13

01409300 Mill Branch near Tuckerton, N.J. Low-flow partial-record station 13

01409375 Mullica River near Atco, N.J. Low-flow partial-record station 14

01409387 Mullica River at outlet of Atsion Lake, at Atsion, N.J. Low-flow partial-record station 14

01409390 Mullica River at Atsion, N.J. Low-flow partial-record station 14

01409395 Mullica River Tributary near Atsion, N.J. Low-flow partial-record station 14

01409400 Mullica River near Batsto, N.J. Continuous-record gaging station 14

01409401 Hays Mill Creek at Atco, N.J. Low-flow partial-record station 14

01409403 Wildcat Branch at Chesilhurst, N.J. Low-flow partial-record station 14

01409404 Sleeper Branch at US Rt 206 near Atsion, N.J. Low-flow partial-record station 14

01409405 Clark Branch at US Rt 206, near Atsion, N.J. Low-flow partial-record station 14

01409406 Sleeper Branch at Batsto, N.J. Low-flow partial-record station 14

01409407 Pump Branch near Blue Anchor, N.J. Low-flow partial-record station 14

01409408 Pump Branch near Waterford Works, N.J. Low-flow partial-record station 14

01409409 Blue Anchor Brook near Blue Anchor, N.J. Low-flow partial-record station 14

01409410 Albertson Brook near Hammonton, N.J. Low-flow partial-record station 14

01409411 Nescochague Creek at Pleasant Mills, N.J. Low-flow partial-record station 14

01409416 Hammonton Creek at Wescoatville, N.J. Low-flow partial-record station 14

01409450 Springers Brook near Indian Mills, N.J. Low-flow partial-record station 14

01409460 Springers Brook near Atsion, N.J. Low-flow partial-record station 14

01409500 Batsto River at Batsto, N.J. Continuous-record gaging station 14

01409575 Landing Creek at Philadelphia Avenue at Egg Harbor City, N.J. Low-flow partial-record station 14

01409730 West Branch Wading River near Chatsworth, N.J. Low-flow partial-record station 14

01409780 Tulpehocken Creek near Jenkins, N.J. Low-flow partial-record station 14

01409800 West Branch Wading River near Harrisville, N.J. Low-flow partial-record station 14

01409810 West Branch Wading River near Jenkins, N.J. Continuous-record gaging station 14

01409815 West Branch Wading River at Maxwell, N.J. Low-flow partial-record station 14

01409970 Oswego River at Oswego Lake, N.J. Low-flow partial-record station 14

01410000 Oswego River at Harrisville, N.J. Continuous-record gaging station 14

01410150 East Branch Bass River near New Gretna, N.J. Continuous-record gaging station 14

01410200 West Branch Bass River near New Gretna, N.J. Low-flow partial-record station 14

01410215 Clarks Mill Stream at Port Republic, N.J. Low-flow partial-record station 14

01410225 Morses Mill Stream at Port Republic, N.J. Low-flow partial-record station 14

01410500 Absecon Creek at Absecon, N.J. Continuous-record gaging station Yes 15

01410775 Great Egg Harbor River at Berlin, N.J. Low-flow partial-record station 15

70 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Table 1-1.  Index, by station identification number, of selected continuous-record streamflow-gaging stations, low-flow partial-record

stations, and gaging stations analyzed as a partial-record stations in New Jersey, New York, and Pennsylvania.—Continued

[Stations are listed in downstream order; ID, identification number]

Station ID Station name Station type Regulation

Watershed 

Management Area

01410784 Great Egg Harbor River near Sicklerville, N.J. Gaging station analyzed as a 

partial-record station

15

01410787 Great Egg Harbor River Tributary at Sicklerville, N.J. Gaging station analyzed as a 

partial-record station

15

01410800 Fourmile Branch near Williamstown, N.J. Low-flow partial-record station 15

01410803 Fourmile Branch at Winslow Crossing, N.J. Low-flow partial-record station 15

01410810 Fourmile Branch at New Brooklyn, N.J. Gaging station analyzed as a 

partial-record station

15

01410820 Great Egg Harbor River near Blue Anchor, N.J. Gaging station analyzed as a 

partial-record station

15

01410855 Squankum Brook above sewage treatment plant, at 

Williamstown, N.J.

Low-flow partial-record station 15

01410865 Squankum Branch at Malaga Road, near Williamstown, N.J. Low-flow partial-record station 15

01411000 Great Egg Harbor River at Folsom, N.J. Continuous-record gaging station 15

01411020 Penny Pot Stream near Folsom, N.J. Low-flow partial-record station 15

01411035 Hospitality Branch at Blue Bell Road, near Cecil, N.J. Low-flow partial-record station 15

01411040 Hospitality Branch near Cecil, N.J. Low-flow partial-record station 15

01411042 Whitehall Branch near Cecil, N.J. Low-flow partial-record station 15

01411047 Whitehall Branch below Victory Lakes, near Cecil, N.J. Low-flow partial-record station 15

01411053 Hospitality Branch at Berryland, N.J. Low-flow partial-record station 15

01411110 Great Egg Harbor River at Weymouth, N.J. Low-flow partial-record station 15

01411140 Deep Run at Weymouth, N.J. Low-flow partial-record station 15

01411170 Great Egg Harbor River at Mays Landing, N.J. Low-flow partial-record station 15

01411196 Babcock Creek near Mays Landing, N.J. Low-flow partial-record station 15

01411200 Babcock Creek at Mays Landing, N.J. Low-flow partial-record station 15

01411220 South River near Belcoville, N.J. Low-flow partial-record station 15

01411250 English Creek near Scullville, N.J. Low-flow partial-record station 15

01411299 Tarkiln Brook near Head of River, N.J. Low-flow partial-record station 15

01411300 Tuckahoe River at Head of River, N.J. Continuous-record gaging station 15

01411302 Mill Creek near Steelmantown, N.J. Low-flow partial-record station 15

01411305 Mill Branch near Northfield, N.J. Low-flow partial-record station 15

01411351 Mill Creek at outlet Magnolia Lake at Ocean View, N.J. Low-flow partial-record station 16

01411388 Mill Creek at Cold Spring, N.J. Low-flow partial-record station 16

01411400 Fishing Creek at Rio Grande, N.J. Low-flow partial-record station 16

01411404 Green Creek at Green Creek, N.J. Low-flow partial-record station 16

01411408 Dias Creek near Cape May Court House, N.J. Low-flow partial-record station 16

01411410 Bidwell Creek tributary near Cape May Court House, N.J. Low-flow partial-record station 16

01411412 Bidwell Creek tributary 2 near Cape May Court House, N.J. Low-flow partial-record station 16

01411418 Goshen Creek at Goshen, N.J. Low-flow partial-record station 16

Appendix 1 71
Table 1-1.  Index, by station identification number, of selected continuous-record streamflow-gaging stations, low-flow partial-record

stations, and gaging stations analyzed as a partial-record stations in New Jersey, New York, and Pennsylvania.—Continued

[Stations are listed in downstream order; ID, identification number]

Station ID Station name Station type Regulation

Watershed 

Management Area

01411428 Dennis Creek Tributary 2 at Dennisville, N.J. Low-flow partial-record station 16

01411430 Sluice Creek at Clermont, N.J. Low-flow partial-record station 16

01411434 Sluice Creek at outlet Clint Mill Pond at South Dennis, N.J. Low-flow partial-record station 16

01411438 Dennis Creek Tributary 1 near North Dennis, N.J. Low-flow partial-record station 16

01411442 East Creek near Eldora, N.J. Low-flow partial-record station 16

01411444 West Creek near Leesburg, N.J. Low-flow partial-record station 16

01411445 West Creek near Eldora, N.J. Low-flow partial-record station 16

01411450 Still Run at Aura, N.J. Low-flow partial-record station 17

01411456 Little Ease Run near Clayton, N.J. Gaging station analyzed as a 

partial-record station

17

01411460 Scotland Run near Williamstown, N.J. Low-flow partial-record station 17

01411461 Scotland Run at Fries Mill, N.J. Low-flow partial-record station 17

01411462 Scotland Run at Franklinville, N.J. Low-flow partial-record station 17

01411466 Indian Brook near Malaga, N.J. Low-flow partial-record station 17

01411485 Maurice River at Brotmanville, N.J. Gaging station analyzed as a 

partial-record station

17

01411495 Blackwater Branch at Norma, N.J. Gaging station analyzed as a 

partial-record station

17

01411500 Maurice River at Norma, N.J. Continuous-record gaging station 17

01411650 Muddy Run near Elmer, N.J. Low-flow partial-record station 17

01411680 Palatine Branch at Palatine, N.J. Low-flow partial-record station 17

01411700 Muddy Run at Centerton, N.J. Low-flow partial-record station 17

01411800 Maurice River near Millville, N.J. Gaging station analyzed as a 

partial-record station

17

01411850 Mill Creek near Millville, N.J. Low-flow partial-record station 17

01411878 Maurice River at Union Lake Dam at Millville, N.J. Gaging station analyzed as a 

partial-record station

17

01411880 Maurice River at Sharp Street at Millville, N.J. Low-flow partial-record station 17

01411950 Buckshutem Creek near Laurel Lake, N.J. Low-flow partial-record station 17

01411955 Gravelly Run at Laurel Lake, N.J. Low-flow partial-record station 17

01412000 Menantico Creek near Millville, N.J. Continuous-record gaging station 17

01412100 Manumuskin River near Manumuskin, N.J. Low-flow partial-record station 17

01412120 Muskee Creek near Port Elizabeth, N.J. Low-flow partial-record station 17

01412405 Cohansey River near Beals Mill, N.J. Low-flow partial-record station 17

01412500 West Branch Cohansey River at Seeley, N.J. Gaging station analyzed as a 

partial-record station

Yes 17

01412800 Cohansey River at Seeley, N.J. Gaging station analyzed as a 

partial-record station

17

01413010 Barrett Run near Bridgeton, N.J. Low-flow partial-record station 17

01413020 Indian Fields Branch at Bridgeton, N.J. Low-flow partial-record station 17

72 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Table 1-1.  Index, by station identification number, of selected continuous-record streamflow-gaging stations, low-flow partial-record

stations, and gaging stations analyzed as a partial-record stations in New Jersey, New York, and Pennsylvania.—Continued

[Stations are listed in downstream order; ID, identification number]

Station ID Station name Station type Regulation

Watershed 

Management Area

01413050 Stow Creek at Jericho, N.J. Low-flow partial-record station 17

01413060 Canton Drain near Canton, N.J. Low-flow partial-record station 17

01413080 Raccoon D at Davis Mill, N.J. Low-flow partial-record station 17

01434000 Delaware River at Port Jervis, N.Y. Continuous-record gaging station Yes 21

01437500 Neversink River at Godeffroy, N.Y. Continuous-record gaging station Yes 21

01438090 Clove Brook at N.J. Route 23 at Duttonville, N.J. Low-flow partial-record station 01

01438400 Shimers Brook near Montague, N.J. Low-flow partial-record station 01

01438500 Delaware River at Montague, N.J. Continuous-record gaging station Yes 01

01439800 Big Flat Brook near Hainesville, N.J. Low-flow partial-record station 01

01439830 Big Flat Brook at Tuttles Corner, N.J. Low-flow partial-record station 01

01439900 Little Flat Brook at Hainesville, N.J. Low-flow partial-record station 01

01439920 Little Flat Brook at Peters Valley, N.J. Low-flow partial-record station 01

01440000 Flat Brook near Flatbrookville, N.J. Continuous-record gaging station 01

01440100 Vancampens Brook near Millbrook, N.J. Low-flow partial-record station 01

01440200 Delaware River near Delaware Water Gap, Pa. Continuous-record gaging station Yes 01

01442760 Dunnfield Creek at Dunnfield, N.J. Low-flow partial-record station 01

01442800 Stony Brook near Columbia, N.J. Low-flow partial-record station 01

01443260 East Branch Paulins Kill Tributary 2 near Woodruffs Gap, N.J. Low-flow partial-record station 01

01443275 East Branch Paulins Kill Tributary 1 near Lafayette, N.J. Low-flow partial-record station 01

01443280 East Branch Paulins Kill near Lafayette, N.J. Gaging station analyzed as a 

partial-record station

01

01443300 Paulins Kill at Lafayette, N.J. Low-flow partial-record station 01

01443400 Culvers Creek at Branchville, N.J. Low-flow partial-record station 01

01443409 Dry Brook at Mill Road, at Branchville, N.J. Low-flow partial-record station 01

01443450 Paulins Kill near Newton, N.J. Low-flow partial-record station 01

01443460 Paulins Kill at Paulins Kill, N.J. Low-flow partial-record station 01

01443475 Trout Brook near Middleville, N.J. Low-flow partial-record station 01

01443500 Paulins Kill at Blairstown, N.J. Continuous-record gaging station 01

01443510 Blair Creek at Blairstown, N.J. Low-flow partial-record station 01

01443900 Yards Creek near Blairstown, N.J. Continuous-record gaging station Yes 01

01445000 Pequest River at Huntsville, N.J. Continuous-record gaging station 01

01445160 Bear Brook at Dark Moon Road near Johnsonburg, N.J. Low-flow partial-record station 01

01445200 Bear Creek near Johnsonburg, N.J. Low-flow partial-record station 01

01445430 Pequest River at Townsbury, N.J. Gaging station analyzed as a 

partial-record station

01

01445490 Furnace Brook at Oxford, N.J. Low-flow partial-record station 01

01445500 Pequest River at Pequest, N.J. Continuous-record gaging station 01

Appendix 1 73
Table 1-1.  Index, by station identification number, of selected continuous-record streamflow-gaging stations, low-flow partial-record

stations, and gaging stations analyzed as a partial-record stations in New Jersey, New York, and Pennsylvania.—Continued

[Stations are listed in downstream order; ID, identification number]

Station ID Station name Station type Regulation

Watershed 

Management Area

01445520 Mountain Lake Brook near Pequest, N.J. Low-flow partial-record station 01

01445800 Honey Run near Ramseyburg, N.J. Low-flow partial-record station 01

01445900 Honey Run near Hope, N.J. Low-flow partial-record station 01

01446000 Beaver Brook near Belvidere, N.J. Continuous-record gaging station 01

01446400 Pequest River at Belvidere, N.J. Low-flow partial-record station 01

01446500 Delaware River at Belvidere, N.J. Continuous-record gaging station Yes 01

01446520 Pophandusing Brook at Belvidere, N.J. Low-flow partial-record station 01

01446568 Buckhorn Creek at Hutchinson Road, at Hutchinson, N.J. Low-flow partial-record station 01

01453000 Lehigh River at Bethlehem, Pa. Continuous-record gaging station Yes 22

01455100 Lopatcong Creek at Phillipsburg, N.J. Low-flow partial-record station 01

01455135 Pohatcong Creek at Tunnel Hill Road, near Washington, N.J. Low-flow partial-record station 01

01455160 Brass Castle Creek near Washington, N.J. Low-flow partial-record station 01

01455200 Pohatcong Creek at New Village, N.J. Gaging station analyzed as a 

partial-record station

01

01455230 Merrill Creek at Coopersville, N.J. Low-flow partial-record station 01

01455300 Pohatcong Creek at Carpentersville, N.J. Low-flow partial-record station 01

01455350 Weldon Brook near Woodport, N.J. Low-flow partial-record station 01

01455355 Beaver Brook near Weldon, N.J. Gaging station analyzed as a 

partial-record station

01

01455360 Beaver Brook near Woodport, N.J. Low-flow partial-record station 01

01455370 Weldon Brook at Hurdtown, N.J. Low-flow partial-record station 01

01455500 Musconetcong River at outlet of Lake Hopatcong, N.J. Continuous-record gaging station Yes 01

01455550 Musconetcong River at Stanhope, N.J. Low-flow partial-record station 01

01455780 Lubbers Run at Lockwood, N.J. Low-flow partial-record station 01

01456000 Musconetcong River near Hackettstown, N.J. Continuous-record gaging station 01

01456080 Mine Brook near Hackettstown, N.J. Low-flow partial-record station 01

01456100 Hatchery Brook at Hackettstown, N.J. Low-flow partial-record station 01

01456210 Hances Brook near Beattystown, N.J. Low-flow partial-record station 01

01457000 Musconetcong River near Bloomsbury, N.J. Continuous-record gaging station 01

01457400 Musconetcong River at Riegelsville, N.J. Low-flow partial-record station 01

01457500 Delaware River at Riegelsville, N.J. Continuous-record gaging station Yes 01

01458100 Hakihokake Creek at Milford, N.J. Low-flow partial-record station 11

01458400 Hakihokake Creek near Frenchtown, N.J. Low-flow partial-record station 11

01458570 Nishisakawick Creek near Frenchtown, N.J. Low-flow partial-record station 11

01458600 Nishisakawick Creek at Frenchtown, N.J. Low-flow partial-record station 11

01458700 Little Nishisakawick Creek at Frenchtown, N.J. Low-flow partial-record station 11

01460500 Delaware and Raritan Canal at Kingston, N.J. Continuous-record gaging station Yes 10

74 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Table 1-1.  Index, by station identification number, of selected continuous-record streamflow-gaging stations, low-flow partial-record

stations, and gaging stations analyzed as a partial-record stations in New Jersey, New York, and Pennsylvania.—Continued

[Stations are listed in downstream order; ID, identification number]

Station ID Station name Station type Regulation

Watershed 

Management Area

01460900 Lockatong Creek near Raven Rock, N.J. Low-flow partial-record station 11

01461300 Wickecheoke Creek at Stockton, N.J. Low-flow partial-record station 11

01461900 Alexauken Creek near Lambertville, N.J. Low-flow partial-record station 11

01462200 Moores Creek near Titusville, N.J. Low-flow partial-record station 11

01462800 Jacobs Creek at Somerset, N.J. Low-flow partial-record station 11

01463500 Delaware River at Trenton, N.J. Continuous-record gaging station Yes 11

01463620 Assunpink Creek near Clarksville, N.J. Gaging station analyzed as a 

partial-record station

11

01463650 Shipetaukin Creek at Lawrenceville, N.J. Low-flow partial-record station 11

01463670 Shipetaukin Creek at Bakersville, N.J. Low-flow partial-record station 11

01463690 Little Shabakunk Creek at Bakersville, N.J. Gaging station analyzed as a 

partial-record station

11

01463750 Shabakunk Creek at Ewingville, N.J. Low-flow partial-record station 11

01463790 West Branch Shabakunk Creek near Ewingville, N.J. Low-flow partial-record station 11

01463830 Miry Run at Robbinsville, N.J. Low-flow partial-record station 11

01463860 Miry Run at Mercerville, N.J. Low-flow partial-record station 11

01463980 Pond Run at Trenton, N.J. Low-flow partial-record station 11

01464000 Assunpink Creek at Trenton, N.J. Continuous-record gaging station Yes 11

01464300 Crosswicks Creek near Cookstown, N.J. Low-flow partial-record station 20

01464380 North Run at Cookstown, N.J. Low-flow partial-record station 20

01464460 Lahaway Creek near Hornerstown, N.J. Low-flow partial-record station 20

01464480 Miry Run at Holmes Mills, N.J. Low-flow partial-record station 20

01464500 Crosswicks Creek at Extonville, N.J. Continuous-record gaging station 20

01464504 Crosswicks Creek at Groveville Road, at Groveville, N.J. Low-flow partial-record station 20

01464515 Doctors Creek at Allentown, N.J. Low-flow partial-record station 20

01464525 Thorton Creek at Bordentown,, N.J. Gaging station analyzed as a 

partial-record station

20

01464530 Blacks Creek at Mansfield Sqaure, N.J. Low-flow partial-record station 20

01464540 Crafts Creek at Hedding, N.J. Low-flow partial-record station 20

01464580 Assiscunk Creek at Columbus, N.J. Low-flow partial-record station 20

01464590 Assiscunk Creek near Burlington, N.J. Low-flow partial-record station 20

01465847 Jade Run at Vincentown, N.J. Low-flow partial-record station 19

01465850 South Branch Rancocas Creek at Vincentown, N.J. Gaging station analyzed as a 

partial-record station

19

01465865 Barton Run at Tuckerton Road, near Medford, N.J. Low-flow partial-record station 19

01465880 Southwest Branch Rancocas Creek at Medford, N.J. Low-flow partial-record station 19

01465884 Sharps Run at Route 541 at Medford, N.J. Low-flow partial-record station 19

01465898 Little Creek near Lumberton, N.J. Low-flow partial-record station 19

01465900 Southwest Branch Rancocas at Eayerstown, N.J. Low-flow partial-record station 19

Appendix 1 75
Table 1-1.  Index, by station identification number, of selected continuous-record streamflow-gaging stations, low-flow partial-record

stations, and gaging stations analyzed as a partial-record stations in New Jersey, New York, and Pennsylvania.—Continued

[Stations are listed in downstream order; ID, identification number]

Station ID Station name Station type Regulation

Watershed 

Management Area

01465965 Ong Run at Browns Mills, N.J. Low-flow partial-record station 19

01466000 Middle Branch Mount Misery Brook in Lebanon State 

Forest, N.J.

Gaging station analyzed as a 

partial-record station

19

01466500 Mcdonalds Branch in Lebanon State Forest, N.J. Continuous-record gaging station 19

01466900 Greenwood Brook at New Lisbon, N.J. Gaging station analyzed as a 

partial-record station

19

01467000 North Branch Rancocas Creek at Pemberton, N.J. Continuous-record gaging station 19

01467005 North Branch Rancocas Creek at Iron Works Park, at 

Mount Holly, N.J.

Low-flow partial-record station 19

01467010 Parkers Creek near Mount Laurel, N.J. Low-flow partial-record station 19

01467019 Mill Creek near Willingboro, N.J. Gaging station analyzed as a 

partial-record station

19

01467020 Mill Creek at Willingboro, N.J. Low-flow partial-record station 19

01467021 Mill Creek at Levitt Parkway at Willingboro, N.J. Gaging station analyzed as a 

partial-record station

19

01467057 Pompeston Creek at Cinnaminson, N.J. Low-flow partial-record station 18

01467070 North Branch Pennsauken Creek at Maple Shade, N.J. Low-flow partial-record station 18

01467080 South Branch Pennsauken Creek at Maple Shade, N.J. Low-flow partial-record station 18

01467081 South Branch Pennsauken Creek at Cherry Hill, N.J. Continuous-record gaging station 18

01467130 Cooper River at Kirkwood, N.J. Low-flow partial-record station 18

01467140 Cooper River at Lawnside, N.J. Low-flow partial-record station 18

01467150 Cooper River at Haddonfield, N.J. Continuous-record gaging station Yes 18

01467160 North Branch Cooper River near Marlton, N.J. Low-flow partial-record station 18

01467180 North Branch Cooper River at Ellisburg, N.J. Low-flow partial-record station 18

01467305 Newton Creek at Collingswood, N.J. Low-flow partial-record station 18

01467312 Newton Creek at West Collingswood, N.J. Low-flow partial-record station 18

01467315 South Branch Newton Creek at Glover Av at Haddon 

Heights, N.J.

Low-flow partial-record station 18

01467317 South Branch Newton Creek at Haddon Heights, N.J. Low-flow partial-record station 18

01467329 South Branch Big Timber Creek at Blackwood Terrace, N.J. Low-flow partial-record station 18

01467330 South Branch Big Timber Creek at Blackwood, N.J. Low-flow partial-record station 18

01467350 North Branch Big Timber Creek at Laurel Springs, N.J. Low-flow partial-record station 18

01474500 Schuylkill River at Philadelphia, Pa. Continuous-record gaging station Yes 26

01474950 Mantua Creek at Glassboro, N.J. Low-flow partial-record station 18

01474970 Mantua Creek at Greentree Road, at Glassboro, N.J. Low-flow partial-record station 18

01475000 Mantua Creek at Pitman, N.J. Continuous-record gaging station 18

01475020 Mantua Creek at Sewell, N.J. Low-flow partial-record station 18

01476600 Still Run near Mickleton, N.J. Gaging station analyzed as a 

partial-record station

18

01476640 Pargey Creek at Swedesboro Avenue at Repaupo, N.J. Low-flow partial-record station 18

76 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Table 1-1.  Index, by station identification number, of selected continuous-record streamflow-gaging stations, low-flow partial-record

stations, and gaging stations analyzed as a partial-record stations in New Jersey, New York, and Pennsylvania.—Continued

[Stations are listed in downstream order; ID, identification number]

Station ID Station name Station type Regulation

Watershed 

Management Area

01477100 Raccoon Creek near Mullica Hill, N.J. Low-flow partial-record station 18

01477110 Raccoon Creek at Mullica Hill, N.J. Low-flow partial-record station 18

01477118 South Branch Raccoon Creek near Mullica Hill, N.J. Low-flow partial-record station 18

01477120 Raccoon Creek near Swedesboro, N.J. Continuous-record gaging station 18

01477130 Basgalore Creek at Russell Mill Road, near Swedesboro, N.J. Low-flow partial-record station 18

01477510 Oldmans Creek at Porches Mill, N.J. Low-flow partial-record station 18

01482500 Salem River at Woodstown, N.J. Continuous-record gaging station Yes 17

01482510 Nichomus Run near Woodstown, N.J. Low-flow partial-record station 17

01482520 Salem River at Sharptown, N.J. Low-flow partial-record station 17

01482530 Major Run at Sharptown, N.J. Low-flow partial-record station 17

01482900 Cool Run near Alloway, N.J. Low-flow partial-record station 17

01482950 Cedar Brook near Alloway, N.J. Low-flow partial-record station 17

01483000 Alloway Creek at Alloway, N.J. Continuous-record gaging station Yes 17

01483010 Deep Run near Alloway, N.J. Low-flow partial-record station 17

0140940200 Hays Mill Creek near Chesilhurst, N.J. Low-flow partial-record station 14

0140940250 Cooper Branch near Chesilhurst, N.J. Low-flow partial-record station 14

0140940310 Wildcat Branch near Chesilhurst, N.J. Low-flow partial-record station 14

0140940360 Sleeper Branch above diversion, near Atsion, N.J. Low-flow partial-record station 14

0140940370 Sleeper Branch near Atsion, N.J. Low-flow partial-record station 14

0140940480 Clark Branch near Atsion, N.J. Low-flow partial-record station 14

0140940950 Blue Anchor Brook at Elm, N.J. Low-flow partial-record station 14

0140940970 Albertson Branch near Elm, N.J. Low-flow partial-record station 14

0140941050 Great Swamp Branch at Elm, N.J. Low-flow partial-record station 14

0146700260 Indian Run at Birmingham, N.J. Low-flow partial-record station 19

Appendix 1 77
Table 1-2.  Index, by station name, of selected continuous-record streamflow-gaging stations, low-flow partial-record stations, and

gaging stations analyzed as a partial-record stations in New Jersey, New York, and Pennsylvania.—Continued

[Stations are listed in downstream order; ID, identification number]

Station ID Station name Station type Regulation

Watershed 

Management Area

01410500 Absecon Creek at Absecon, N.J. Continuous-record gaging station Yes 15

01387950 Acid Brook at Pompton Lakes, N.J. Low-flow partial-record station 03

0140940970 Albertson Branch near Elm, N.J. Low-flow partial-record station 14

01409410 Albertson Brook near Hammonton, N.J. Low-flow partial-record station 14

01461900 Alexauken Creek near Lambertville, N.J. Low-flow partial-record station 11

01483000 Alloway Creek at Alloway, N.J. Continuous-record gaging station Yes 17

01404060 Ambrose Brook at Middlesex, N.J. Low-flow partial-record station 09

01397290 Assiscong Creek at Bartles Corners, N.J. Low-flow partial-record station 08

01464580 Assiscunk Creek at Columbus, N.J. Low-flow partial-record station 20

01464590 Assiscunk Creek near Burlington, N.J. Low-flow partial-record station 20

01464000 Assunpink Creek at Trenton, N.J. Continuous-record gaging station Yes 11

01463620 Assunpink Creek near Clarksville, N.J. Gaging station analyzed as a 

partial-record station

11

01399525 Axle Brook near Pottersville, N.J. Gaging station analyzed as a 

partial-record station

08

01411200 Babcock Creek at Mays Landing, N.J. Low-flow partial-record station 15

01411196 Babcock Creek near Mays Landing, N.J. Low-flow partial-record station 15

01398052 Back Brook near Reaville, N.J. Low-flow partial-record station 08

01398045 Back Brook Tributary near Ringoes, N.J. Gaging station analyzed as a 

partial-record station

Yes 08

01400932 Baldwins Creek at Baldwin Lake near Pennington, N.J. Gaging station analyzed as a 

partial-record station

10

01400930 Baldwins Creek at Pennington, N.J. Low-flow partial-record station 10

01405285 Barclay Brook near Englishtown, N.J. Low-flow partial-record station 09

01413010 Barrett Run near Bridgeton, N.J. Low-flow partial-record station 17

01465865 Barton Run at Tuckerton Road, near Medford, N.J. Low-flow partial-record station 19

01477130 Basgalore Creek at Russell Mill Road, near Swedesboro, N.J. Low-flow partial-record station 18

01409500 Batsto River at Batsto, N.J. Continuous-record gaging station 14

01445160 Bear Brook at Dark Moon Road near Johnsonburg, N.J. Low-flow partial-record station 01

01400810 Bear Brook at Princeton Junction, N.J. Low-flow partial-record station 10

01400800 Bear Brook near Grovers Mill, N.J. Low-flow partial-record station 10

01400750 Bear Brook near Hickory Corner, N.J. Low-flow partial-record station 10

01445200 Bear Creek near Johnsonburg, N.J. Low-flow partial-record station 01

01387700 Bear Swamp Brook near Oakland, N.J. Low-flow partial-record station 03

01380000 Beaver Brook at outlet of Splitrock Res, N.J. Continuous-record gaging station Yes 06

01380100 Beaver Brook at Rockaway, N.J. Low-flow partial-record station 06

01446000 Beaver Brook near Belvidere, N.J. Continuous-record gaging station 01

01455355 Beaver Brook near Weldon, N.J. Gaging station analyzed as a 

partial-record station

01

78 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Table 1-2.  Index, by station name, of selected continuous-record streamflow-gaging stations, low-flow partial-record stations, and

gaging stations analyzed as a partial-record stations in New Jersey, New York, and Pennsylvania.—Continued

[Stations are listed in downstream order; ID, identification number]

Station ID Station name Station type Regulation

Watershed 

Management Area

01455360 Beaver Brook near Woodport, N.J. Low-flow partial-record station 01

01388700 Beaver Dam Brook at Lincoln Park, N.J. Low-flow partial-record station 03

01388720 Beaver Dam Brook at Ryerson Road, at Lincoln Park, N.J. Low-flow partial-record station 03

01367750 Beaver Run near Hamburg, N.J. Low-flow partial-record station 02

01404700 Beaverdam Brook near Patricks Corner, N.J. Low-flow partial-record station 09

01401520 Beden Brook near Hopewell, N.J. Low-flow partial-record station 10

01401600 Beden Brook near Rocky Hill, N.J. Low-flow partial-record station 10

01382870 Belcher Creek at Stowaway Road at West Milford, N.J. Low-flow partial-record station 03

01382890 Belcher Creek at West Milford, N.J. Low-flow partial-record station 03

01382880 Belcher Creek Tributary at West Milford, N.J. Low-flow partial-record station 03

01411412 Bidwell Creek Tributary 2 near Cape May Court House, N.J. Low-flow partial-record station 16

01411410 Bidwell Creek Tributary near Cape May Court House, N.J. Low-flow partial-record station 16

01407300 Big Brook at Vanderburg, N.J. Low-flow partial-record station 12

01439830 Big Flat Brook at Tuttles Corner, N.J. Low-flow partial-record station 01

01439800 Big Flat Brook near Hainesville, N.J. Low-flow partial-record station 01

01378900 Black Brook near Meyersville, N.J. Low-flow partial-record station 06

01368950 Black Creek near Vernon, N.J. Low-flow partial-record station 02

01464530 Blacks Creek at Mansfield Sqaure, N.J. Low-flow partial-record station 20

01411495 Blackwater Branch at Norma, N.J. Gaging station analyzed as a 

partial-record station

17

01443510 Blair Creek at Blairstown, N.J. Low-flow partial-record station 01

0140940950 Blue Anchor Brook at Elm, N.J. Low-flow partial-record station 14

01409409 Blue Anchor Brook near Blue Anchor, N.J. Low-flow partial-record station 14

01403395 Blue Brook at Seeleys Pond Dam near Berkeley Heights, N.J. Low-flow partial-record station 09

01386500 Blue Mine Brook near Wanaque, N.J. Continuous-record gaging station 03

01403900 Bound Brook at Middlesex, N.J. Gaging station analyzed as a 

partial-record station

09

01403385 Bound Brook at Route 28 at Middlesex, N.J. Low-flow partial-record station 09

01403330 Bound Brook at South Plainfield, N.J. Low-flow partial-record station 09

01455160 Brass Castle Creek near Washington, N.J. Low-flow partial-record station 01

01446568 Buckhorn Creek at Hutchinson Road, at Hutchinson, N.J. Low-flow partial-record station 01

01411950 Buckshutem Creek near Laurel Lake, N.J. Low-flow partial-record station 17

01398360 Burnett Brook near Chester, N.J. Low-flow partial-record station 08

01379525 Canoe Brook near Millburn, N.J. Low-flow partial-record station 06

01413060 Canton Drain near Canton, N.J. Low-flow partial-record station 17

01396900 Capoolong Creek at Lansdowne, N.J. Low-flow partial-record station 08

01403350 Cedar Brook at South Plainfield, N.J. Low-flow partial-record station 09

Appendix 1 79
Table 1-2.  Index, by station name, of selected continuous-record streamflow-gaging stations, low-flow partial-record stations, and

gaging stations analyzed as a partial-record stations in New Jersey, New York, and Pennsylvania.—Continued

[Stations are listed in downstream order; ID, identification number]

Station ID Station name Station type Regulation

Watershed 

Management Area

01405435 Cedar Brook at Spotswood, N.J. Low-flow partial-record station 09

01482950 Cedar Brook near Alloway, N.J. Low-flow partial-record station 17

01408830 Cedar Creek at Cedar Crest, N.J. Low-flow partial-record station 13

01409000 Cedar Creek at Lanoka Harbor, N.J. Continuous-record gaging station 13

01409250 Cedar Run near Manahawkin, N.J. Low-flow partial-record station 13

01399900 Chambers Brook at North Branch Depot, N.J. Low-flow partial-record station 08

01399820 Chambers Brook near North Branch, N.J. Low-flow partial-record station 08

01409405 Clark Branch at US Rt 206, near Atsion, N.J. Low-flow partial-record station 14

0140940480 Clark Branch near Atsion, N.J. Low-flow partial-record station 14

01410215 Clarks Mill Stream at Port Republic, N.J. Low-flow partial-record station 14

01367890 Clove Brook above Clove Acres Lake, at Sussex, N.J. Low-flow partial-record station 02

01438090 Clove Brook at N.J. Route 23 at Duttonville, N.J. Low-flow partial-record station 01

01367900 Clove Brook at Sussex, N.J. Low-flow partial-record station 02

01412800 Cohansey River at Seeley, N.J. Gaging station analyzed as a 

partial-record station

17

01412405 Cohansey River near Beals Mill, N.J. Low-flow partial-record station 17

01399540 Cold Brook at Oldwick, N.J. Low-flow partial-record station 08

01378560 Coles Brook at Hackensack, N.J. Low-flow partial-record station 05

01482900 Cool Run near Alloway, N.J. Low-flow partial-record station 17

01382990 Cooley Brook near West Milford, N.J. Low-flow partial-record station 03

0140940250 Cooper Branch near Chesilhurst, N.J. Low-flow partial-record station 14

01467150 Cooper River at Haddonfield, N.J. Continuous-record gaging station Yes 18

01467130 Cooper River at Kirkwood, N.J. Low-flow partial-record station 18

01467140 Cooper River at Lawnside, N.J. Low-flow partial-record station 18

01464540 Crafts Creek at Hedding, N.J. Low-flow partial-record station 20

01400700 Cranbury Brook at Cranbury Station, N.J. Low-flow partial-record station 10

01400670 Cranbury Brook at Old Church, N.J. Low-flow partial-record station 10

01400725 Cranbury Brook at Plainsboro, N.J. Low-flow partial-record station 10

01381150 Crooked Brook near Boonton, N.J. Low-flow partial-record station 06

01464500 Crosswicks Creek at Extonville, N.J. Continuous-record gaging station 20

01464504 Crosswicks Creek at Groveville Road, at Groveville, N.J. Low-flow partial-record station 20

01464300 Crosswicks Creek near Cookstown, N.J. Low-flow partial-record station 20

01443400 Culvers Creek at Branchville, N.J. Low-flow partial-record station 01

01385000 Cupsaw Brook near Wanaque, N.J. Continuous-record gaging station 03

01387600 Darlington Brook near Darlington, N.J. Low-flow partial-record station 03

01408620 Davenport Branch near Dover Forge, N.J. Low-flow partial-record station 13

01398300 Dawsons Brook near Ironia, N.J. Low-flow partial-record station 08

01379200 Dead River near Millington, N.J. Low-flow partial-record station 06

80 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Table 1-2.  Index, by station name, of selected continuous-record streamflow-gaging stations, low-flow partial-record stations, and

gaging stations analyzed as a partial-record stations in New Jersey, New York, and Pennsylvania.—Continued

[Stations are listed in downstream order; ID, identification number]

Station ID Station name Station type Regulation

Watershed 

Management Area

01407860 Debois Creek at Adelphia, N.J. Low-flow partial-record station 12

01406050 Deep Run at Old Bridge, N.J. Gaging station analyzed as a 

partial-record station

09

01406040 Deep Run at Route 516, near Old Bridge, N.J. Low-flow partial-record station 09

01411140 Deep Run at Weymouth, N.J. Low-flow partial-record station 15

01483010 Deep Run near Alloway, N.J. Low-flow partial-record station 17

01406000 Deep Run near Browntown, N.J. Gaging station analyzed as a 

partial-record station

09

01389140 Deepavaal Brook at Two Bridges, N.J. Low-flow partial-record station 04

01460500 Delaware and Raritan Canal at Kingston, N.J. Continuous-record gaging station Yes 10

01446500 Delaware River at Belvidere, N.J. Continuous-record gaging station Yes 01

01438500 Delaware River at Montague, N.J. Continuous-record gaging station Yes 01

01434000 Delaware River at Port Jervis, N.Y. Continuous-record gaging station Yes 21

01457500 Delaware River at Riegelsville, N.J. Continuous-record gaging station Yes 01

01463500 Delaware River at Trenton, N.J. Continuous-record gaging station Yes 11

01440200 Delaware River near Delaware Water Gap, Pa. Continuous-record gaging station Yes 01

01411438 Dennis Creek Tributary 1 near North Dennis, N.J. Low-flow partial-record station 16

01411428 Dennis Creek Tributary 2 at Dennisville, N.J. Low-flow partial-record station 16

01411408 Dias Creek near Cape May Court House, N.J. Low-flow partial-record station 16

01464515 Doctors Creek at Allentown, N.J. Low-flow partial-record station 20

01368840 Double Kill at New Milford, N.Y. Low-flow partial-record station 23

01368820 Double Kill at Wawayanda, N.J. Low-flow partial-record station 02

01396180 Drakes Brook at Bartley, N.J. Low-flow partial-record station 08

01443409 Dry Brook at Mill Road, at Branchville, N.J. Low-flow partial-record station 01

01401200 Duck Pond Run at Clarksville, N.J. Low-flow partial-record station 10

01442760 Dunnfield Creek at Dunnfield, N.J. Low-flow partial-record station 01

01378410 Dwars Kill at Norwood, N.J. Low-flow partial-record station 05

01410150 East Branch Bass River near New Gretna, N.J. Continuous-record gaging station 14

01403100 East Branch Middle Brook at Martinsville, N.J. Low-flow partial-record station 09

01443280 East Branch Paulins Kill near Lafayette, N.J. Gaging station analyzed as a 

partial-record station

01

01443275 East Branch Paulins Kill Tributary 1 near Lafayette, N.J. Low-flow partial-record station 01

01443260 East Branch Paulins Kill Tributary 2 near Woodruffs Gap, N.J. Low-flow partial-record station 01

01393890 East Branch Rahway River at Maplewood, N.J. Low-flow partial-record station 07

01403535 East Branch Stony Brook at Best Lake at Watchung, N.J. Continuous-record gaging station 09

01407055 East Creek at North Centerville, N.J. Low-flow partial-record station 12

01411442 East Creek near Eldora, N.J. Low-flow partial-record station 16

01393800 East Fork East Branch Rahway River at West Orange, N.J. Gaging station analyzed as a 

partial-record station

07

Appendix 1 81
Table 1-2.  Index, by station name, of selected continuous-record streamflow-gaging stations, low-flow partial-record stations, and

gaging stations analyzed as a partial-record stations in New Jersey, New York, and Pennsylvania.—Continued

[Stations are listed in downstream order; ID, identification number]

Station ID Station name Station type Regulation

Watershed 

Management Area

01396240 Electric Brook at Long Valley, N.J. Low-flow partial-record station 08

01393000 Elizabeth River at Irvington, N.J. Gaging station analyzed as a 

partial-record station

07

01393450 Elizabeth River at Ursino Lake at Elizabeth, N.J. Continuous-record gaging station Yes 07

01393200 Elizabeth River below Chancellor Avenue Bridge at 

Irvington, N.J.

Low-flow partial-record station 07

01411250 English Creek near Scullville, N.J. Low-flow partial-record station 15

01385500 Erskine Brook near Wanaque, N.J. Gaging station analyzed as a 

partial-record station

03

01411400 Fishing Creek at Rio Grande, N.J. Low-flow partial-record station 16

01440000 Flat Brook near Flatbrookville, N.J. Continuous-record gaging station 01

01389905 Fleischer Brook at Elmwood Park, N.J. Low-flow partial-record station 04

01410810 Fourmile Branch at New Brooklyn, N.J. Gaging station analyzed as a 

partial-record station

15

01410803 Fourmile Branch at Winslow Crossing, N.J. Low-flow partial-record station 15

01409200 Fourmile Branch near Manahawkin, N.J. Low-flow partial-record station 13

01410800 Fourmile Branch near Williamstown, N.J. Low-flow partial-record station 15

01378530 French Brook at New Bridge, N.J. Low-flow partial-record station 05

01445490 Furnace Brook at Oxford, N.J. Low-flow partial-record station 01

01389850 Goffle Brook at Hawthorne, N.J. Low-flow partial-record station 04

01411418 Goshen Creek at Goshen, N.J. Low-flow partial-record station 16

01407012 Gravelly Brook at Church Street, at Matawan, N.J. Low-flow partial-record station 12

01411955 Gravelly Run at Laurel Lake, N.J. Low-flow partial-record station 17

01378750 Great Brook at Green Village, N.J. Low-flow partial-record station 06

01378850 Great Brook near Basking Ridge, N.J. Low-flow partial-record station 06

01410775 Great Egg Harbor River at Berlin, N.J. Low-flow partial-record station 15

01411000 Great Egg Harbor River at Folsom, N.J. Continuous-record gaging station 15

01411170 Great Egg Harbor River at Mays Landing, N.J. Low-flow partial-record station 15

01411110 Great Egg Harbor River at Weymouth, N.J. Low-flow partial-record station 15

01410820 Great Egg Harbor River near Blue Anchor, N.J. Gaging station analyzed as a 

partial-record station

15

01410784 Great Egg Harbor River near Sicklerville, N.J. Gaging station analyzed as a 

partial-record station

15

01410787 Great Egg Harbor River Tributary at Sicklerville, N.J. Gaging station analyzed as a 

partial-record station

15

0140941050 Great Swamp Branch at Elm, N.J. Low-flow partial-record station 14

01403500 Green Brook at Plainfield, N.J. Continuous-record gaging station Yes 09

01403400 Green Brook at Seeley Mills, N.J. Continuous-record gaging station 09

01382960 Green Brook near West Milford, N.J. Low-flow partial-record station 03

01411404 Green Creek at Green Creek, N.J. Low-flow partial-record station 16

82 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Table 1-2.  Index, by station name, of selected continuous-record streamflow-gaging stations, low-flow partial-record stations, and

gaging stations analyzed as a partial-record stations in New Jersey, New York, and Pennsylvania.—Continued

[Stations are listed in downstream order; ID, identification number]

Station ID Station name Station type Regulation

Watershed 

Management Area

01379773 Green Pond Brook at Picatinny Arsenal, N.J. Gaging station analyzed as a 

partial-record station

06

01379790 Green Pond Brook at Wharton, N.J. Gaging station analyzed as a 

partial-record station

06

01379780 Green Pond Brook below Picatinny Lk at Picatinny Arsenal, N.J. Gaging station analyzed as a 

partial-record station

Yes 06

01466900 Greenwood Brook at New Lisbon, N.J. Gaging station analyzed as a 

partial-record station

19

01378500 Hackensack River at New Milford, N.J. Continuous-record gaging station Yes 05

01377000 Hackensack River at Rivervale, N.J. Continuous-record gaging station Yes 05

01376800 Hackensack River at West Nyack, N.Y. Continuous-record gaging station Yes 25

01458100 Hakihokake Creek at Milford, N.J. Low-flow partial-record station 11

01458400 Hakihokake Creek near Frenchtown, N.J. Low-flow partial-record station 11

01409416 Hammonton Creek at Wescoatville, N.J. Low-flow partial-record station 14

01456210 Hances Brook near Beattystown, N.J. Low-flow partial-record station 01

01407806 Hannabrand Brook at Old Mill Road, near Spring Lake 

Heights, N.J.

Low-flow partial-record station 12

01379150 Harrisons Brook at Liberty Corner, N.J. Low-flow partial-record station 06

01407636 Harvey Brook at West Allenhurst, N.J. Low-flow partial-record station 12

01456100 Hatchery Brook at Hackettstown, N.J. Low-flow partial-record station 01

01387980 Haycock Brook at Pompton Lakes, N.J. Low-flow partial-record station 03

01409401 Hays Mill Creek at Atco, N.J. Low-flow partial-record station 14

0140940200 Hays Mill Creek near Chesilhurst, N.J. Low-flow partial-record station 14

01401400 Heathcote Brook at Kingston, N.J. Low-flow partial-record station 10

01380050 Hibernia Brook at outlet of Lake Telemark, N.J. Low-flow partial-record station 06

01378520 Hirshfeld Brook at New Milford, N.J. Low-flow partial-record station 05

01391000 Hohokus Brook at Ho-Ho-Kus, N.J. Continuous-record gaging station 04

01390700 Hohokus Brook at Wyckoff, N.J. Low-flow partial-record station 04

01398107 Holland Brook at Readington, N.J. Gaging station analyzed as a 

partial-record station

Yes 08

01400953 Honey Branch near Pennington, N.J. Gaging station analyzed as a 

partial-record station

10

01400970 Honey Branch near Rosedale, N.J. Low-flow partial-record station 10

01445900 Honey Run near Hope, N.J. Low-flow partial-record station 01

01445800 Honey Run near Ramseyburg, N.J. Low-flow partial-record station 01

01407200 Hop Brook at Holmdel, N.J. Low-flow partial-record station 12

01411053 Hospitality Branch at Berryland, N.J. Low-flow partial-record station 15

01411035 Hospitality Branch at Blue Bell Road, near Cecil, N.J. Low-flow partial-record station 15

01411040 Hospitality Branch near Cecil, N.J. Low-flow partial-record station 15

01398220 India Brook near Mendham, N.J. Low-flow partial-record station 08

Appendix 1 83
Table 1-2.  Index, by station name, of selected continuous-record streamflow-gaging stations, low-flow partial-record stations, and

gaging stations analyzed as a partial-record stations in New Jersey, New York, and Pennsylvania.—Continued

[Stations are listed in downstream order; ID, identification number]

Station ID Station name Station type Regulation

Watershed 

Management Area

01411466 Indian Brook near Malaga, N.J. Low-flow partial-record station 17

01413020 Indian Fields Branch at Bridgeton, N.J. Low-flow partial-record station 17

0146700260 Indian Run at Birmingham, N.J. Low-flow partial-record station 19

01404470 Ireland Brook at Patricks Corner, N.J. Low-flow partial-record station 09

01405470 Iresick Brook at East Spotswood, N.J. Low-flow partial-record station 09

01462800 Jacobs Creek at Somerset, N.J. Low-flow partial-record station 11

01465847 Jade Run at Vincentown, N.J. Low-flow partial-record station 19

01381470 Jaquis Brook at Greystone Park State Hospital, N.J. Low-flow partial-record station 06

01407755 Jumping Brook above reservior, near Neptune City, N.J. Low-flow partial-record station 12

01407760 Jumping Brook near Neptune City, N.J. Continuous-record gaging station Yes 12

01382360 Kanouse Brook at Newfoundland, N.J. Low-flow partial-record station 03

01464460 Lahaway Creek near Hornerstown, N.J. Low-flow partial-record station 20

01399190 Lamington (Black) River at Succasunna, N.J. Gaging station analyzed as a 

partial-record station

Yes 08

01399200 Lamington (Black) River near Ironia, N.J. Gaging station analyzed as a 

partial-record station

08

01399500 Lamington (Black) River near Pottersville, N.J. Continuous-record gaging station 08

01399300 Lamington River at Milltown, N.J. Low-flow partial-record station 08

01409575 Landing Creek at Philadelphia Avenue at Egg Harbor City, N.J. Low-flow partial-record station 14

01405000 Lawrence Brook at Farrington Dam, N.J. Continuous-record gaging station Yes 09

01404300 Lawrence Brook at outlet of Davidsons Mill Pond, N.J. Low-flow partial-record station 09

01404500 Lawrence Brook at Patricks Corner, N.J. Gaging station analyzed as a 

partial-record station

09

01405030 Lawrence Brook at Westons Mills, N.J. Continuous-record gaging station Yes 09

01453000 Lehigh River at Bethlehem, Pa. Continuous-record gaging station Yes 22

01400770 Little Bear Brook at Hickory Corner, N.J. Low-flow partial-record station 10

01465898 Little Creek near Lumberton, N.J. Low-flow partial-record station 19

01411456 Little Ease Run near Clayton, N.J. Gaging station analyzed as a 

partial-record station

17

01439900 Little Flat Brook at Hainesville, N.J. Low-flow partial-record station 01

01439920 Little Flat Brook at Peters Valley, N.J. Low-flow partial-record station 01

01458700 Little Nishisakawick Creek at Frenchtown, N.J. Low-flow partial-record station 11

01463690 Little Shabakunk Creek at Bakersville, N.J. Gaging station analyzed as a 

partial-record station

11

01460900 Lockatong Creek near Raven Rock, N.J. Low-flow partial-record station 11

01408728 Long Swamp Creek at Toms River, N.J. Low-flow partial-record station 13

01455100 Lopatcong Creek at Phillipsburg, N.J. Low-flow partial-record station 01

01455780 Lubbers Run at Lockwood, N.J. Low-flow partial-record station 01

01382450 Macopin River at Macopin Reservoir, N.J. Low-flow partial-record station 03

84 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Table 1-2.  Index, by station name, of selected continuous-record streamflow-gaging stations, low-flow partial-record stations, and

gaging stations analyzed as a partial-record stations in New Jersey, New York, and Pennsylvania.—Continued

[Stations are listed in downstream order; ID, identification number]

Station ID Station name Station type Regulation

Watershed 

Management Area

01400350 Macs Brook at Somerville, N.J. Gaging station analyzed as a 

partial-record station

10

01407065 Mahoras Brook at Hendrickson Corners, N.J. Low-flow partial-record station 12

01387480 Mahwah River at Suffern, N.Y. Low-flow partial-record station 24

01387450 Mahwah River near Suffern, N.Y. Continuous-record gaging station 24

01482530 Major Run at Sharptown, N.J. Low-flow partial-record station 17

01381550 Malapardis Brook at Whippany, N.J. Low-flow partial-record station 06

01405440 Manalapan Brook at Bridge Street at Spotswood, N.J. Low-flow partial-record station 09

01405340 Manalapan Brook at Federal Road near Manalapan, N.J. Low-flow partial-record station 09

01405400 Manalapan Brook at Spotswood, N.J. Continuous-record gaging station Yes 09

01405335 Manalapan Brook near Manalapan, N.J. Low-flow partial-record station 09

01408460 Manapaqua Brook at Lakehurst, N.J. Low-flow partial-record station 13

01408030 Manasquan River at Allenwood, N.J. Low-flow partial-record station 12

01408000 Manasquan River at Squankum, N.J. Continuous-record gaging station 12

01407900 Manasquan River at West Farms, N.J. Low-flow partial-record station 12

01408029 Manasquan River near Allenwood, N.J. Gaging station analyzed as a 

partial-record station

Yes 12

01407830 Manasquan River near Georgia, N.J. Low-flow partial-record station 12

01474950 Mantua Creek at Glassboro, N.J. Low-flow partial-record station 18

01474970 Mantua Creek at Greentree Road, at Glassboro, N.J. Low-flow partial-record station 18

01475000 Mantua Creek at Pitman, N.J. Continuous-record gaging station 18

01475020 Mantua Creek at Sewell, N.J. Low-flow partial-record station 18

01412100 Manumuskin River near Manumuskin, N.J. Low-flow partial-record station 17

01387490 Masonicus Brook at West Mahwah, N.J. Low-flow partial-record station 03

01407000 Matawan Creek at Matawan, N.J. Continuous-record gaging station Yes 12

01405302 Matchaponix Brook at Mundy Avenue at Spotswood, N.J. Low-flow partial-record station 09

01405300 Matchaponix Brook at Spotswood, N.J. Gaging station analyzed as a 

partial-record station

09

01405290 Matchaponix Brook at Texas, N.J. Low-flow partial-record station 09

01405240 Matchaponix Brook near Englishtown, N.J. Low-flow partial-record station 09

01411485 Maurice River at Brotmanville, N.J. Gaging station analyzed as a 

partial-record station

17

01411500 Maurice River at Norma, N.J. Continuous-record gaging station 17

01411880 Maurice River at Sharp Street at Millville, N.J. Low-flow partial-record station 17

01411878 Maurice River at Union Lake Dam at Millville, N.J. Gaging station analyzed as a 

partial-record station

17

01411800 Maurice River near Millville, N.J. Gaging station analyzed as a 

partial-record station

17

01466500 Mcdonalds Branch in Lebanon State Forest, N.J. Continuous-record gaging station 19

01405180 Mcgellairds Brook at Englishtown, N.J. Low-flow partial-record station 09

Appendix 1 85
Table 1-2.  Index, by station name, of selected continuous-record streamflow-gaging stations, low-flow partial-record stations, and

gaging stations analyzed as a partial-record stations in New Jersey, New York, and Pennsylvania.—Continued

[Stations are listed in downstream order; ID, identification number]

Station ID Station name Station type Regulation

Watershed 

Management Area

01412000 Menantico Creek near Millville, N.J. Continuous-record gaging station 17

01455230 Merrill Creek at Coopersville, N.J. Low-flow partial-record station 01

01378590 Metzler Brook at Englewood, N.J. Low-flow partial-record station 05

01466000 Middle Branch Mount Misery Brook in Lebanon State 

Forest, N.J.

Gaging station analyzed as a 

partial-record station

19

01399100 Middle Brook at Burnt Mills, N.J. Low-flow partial-record station 08

01405170 Milford Brook at Englishtown, N.J. Low-flow partial-record station 09

01411305 Mill Branch near Northfield, N.J. Low-flow partial-record station 15

01409300 Mill Branch near Tuckerton, N.J. Low-flow partial-record station 13

01404180 Mill Brook at Highland Park, N.J. Low-flow partial-record station 09

01411388 Mill Creek at Cold Spring, N.J. Low-flow partial-record station 16

01467021 Mill Creek at Levitt Parkway at Willingboro, N.J. Gaging station analyzed as a 

partial-record station

19

01411351 Mill Creek at outlet Magnolia Lake at Ocean View, N.J. Low-flow partial-record station 16

01467020 Mill Creek at Willingboro, N.J. Low-flow partial-record station 19

01409150 Mill Creek near Manahawkin, N.J. Low-flow partial-record station 13

01411850 Mill Creek near Millville, N.J. Low-flow partial-record station 17

01411302 Mill Creek near Steelmantown, N.J. Low-flow partial-record station 15

01467019 Mill Creek near Willingboro, N.J. Gaging station analyzed as a 

partial-record station

19

01400560 Millstone River at Applegarth, N.J. Low-flow partial-record station 10

01402000 Millstone River at Blackwells Mills, N.J. Continuous-record gaging station Yes 10

01401301 Millstone River at Carnegie Lake at Princeton, N.J. Gaging station analyzed as a 

partial-record station

10

01400580 Millstone River at Hightstown, N.J. Low-flow partial-record station 10

01400600 Millstone River at Locust Corner, N.J. Low-flow partial-record station 10

01400730 Millstone River at Plainsboro, N.J. Gaging station analyzed as a 

partial-record station

10

01400640 Millstone River near Grovers Mill, N.J. Low-flow partial-record station 10

01401500 Millstone River near Kingston, N.J. Gaging station analyzed as a 

partial-record station

Yes 10

01400540 Millstone River near Manalapan, N.J. Low-flow partial-record station 10

01407450 Mine Brook at Colts Neck, N.J. Low-flow partial-record station 12

01398950 Mine Brook at Far Hills, N.J. Low-flow partial-record station 08

01456080 Mine Brook near Hackettstown, N.J. Low-flow partial-record station 01

01408015 Mingamahone Brook at Farmingdale, N.J. Low-flow partial-record station 12

01408020 Mingamahone Brook at Squankum, N.J. Low-flow partial-record station 12

01464480 Miry Run at Holmes Mills, N.J. Low-flow partial-record station 20

01463860 Miry Run at Mercerville, N.J. Low-flow partial-record station 11

01463830 Miry Run at Robbinsville, N.J. Low-flow partial-record station 11

86 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Table 1-2.  Index, by station name, of selected continuous-record streamflow-gaging stations, low-flow partial-record stations, and

gaging stations analyzed as a partial-record stations in New Jersey, New York, and Pennsylvania.—Continued

[Stations are listed in downstream order; ID, identification number]

Station ID Station name Station type Regulation

Watershed 

Management Area

01407026 Mohingson (Wilkson) Creek at Church Street, at Matawan, N.J. Low-flow partial-record station 12

01389765 Molly Ann Brook at North Haledon, N.J. Low-flow partial-record station 04

01389790 Molly Ann Brook at Paterson, N.J. Low-flow partial-record station 04

01462200 Moores Creek near Titusville, N.J. Low-flow partial-record station 11

01410225 Morses Mill Stream at Port Republic, N.J. Low-flow partial-record station 14

01382910 Morsetown Brook at West Milford, N.J. Low-flow partial-record station 03

01445520 Mountain Lake Brook near Pequest, N.J. Low-flow partial-record station 01

01411700 Muddy Run at Centerton, N.J. Low-flow partial-record station 17

01411650 Muddy Run near Elmer, N.J. Low-flow partial-record station 17

01396660 Mulhockaway Creek at Van Syckel, N.J. Continuous-record gaging station 08

01396700 Mulhockaway Creek near Clinton, N.J. Low-flow partial-record station 08

01396670 Mulhockaway Creek Tributary at Van Syckel, N.J. Low-flow partial-record station 08

01409390 Mullica River at Atsion, N.J. Low-flow partial-record station 14

01409387 Mullica River at outlet of Atsion Lake, at Atsion, N.J. Low-flow partial-record station 14

01409375 Mullica River near Atco, N.J. Low-flow partial-record station 14

01409400 Mullica River near Batsto, N.J. Continuous-record gaging station 14

01409395 Mullica River Tributary near Atsion, N.J. Low-flow partial-record station 14

01455500 Musconetcong River at outlet of Lake Hopatcong, N.J. Continuous-record gaging station Yes 01

01457400 Musconetcong River at Riegelsville, N.J. Low-flow partial-record station 01

01455550 Musconetcong River at Stanhope, N.J. Low-flow partial-record station 01

01457000 Musconetcong River near Bloomsbury, N.J. Continuous-record gaging station 01

01456000 Musconetcong River near Hackettstown, N.J. Continuous-record gaging station 01

01412120 Muskee Creek near Port Elizabeth, N.J. Low-flow partial-record station 17

01377475 Musquapsink Brook near Westwood, N.J. Low-flow partial-record station 05

01398500 Nb Raritan River near Far Hills, N.J. Continuous-record gaging station 08

01409411 Nescochague Creek at Pleasant Mills, N.J. Low-flow partial-record station 14

01398000 Neshanic River at Reaville, N.J. Continuous-record gaging station 08

01397800 Neshanic River near Flemington, N.J. Low-flow partial-record station 08

01437500 Neversink River at Godeffroy, N.Y. Continuous-record gaging station Yes 21

01467305 Newton Creek at Collingswood, N.J. Low-flow partial-record station 18

01467312 Newton Creek at West Collingswood, N.J. Low-flow partial-record station 18

01482510 Nichomus Run near Woodstown, N.J. Low-flow partial-record station 17

01458600 Nishisakawick Creek at Frenchtown, N.J. Low-flow partial-record station 11

01458570 Nishisakawick Creek near Frenchtown, N.J. Low-flow partial-record station 11

01394600 Nomahegan Brook near Mountainside, N.J. Low-flow partial-record station 07

01467350 North Branch Big Timber Creek at Laurel Springs, N.J. Low-flow partial-record station 18

01467180 North Branch Cooper River at Ellisburg, N.J. Low-flow partial-record station 18

01467160 North Branch Cooper River near Marlton, N.J. Low-flow partial-record station 18

Appendix 1 87
Table 1-2.  Index, by station name, of selected continuous-record streamflow-gaging stations, low-flow partial-record stations, and

gaging stations analyzed as a partial-record stations in New Jersey, New York, and Pennsylvania.—Continued

[Stations are listed in downstream order; ID, identification number]

Station ID Station name Station type Regulation

Watershed 

Management Area

01409050 North Branch Forked River near Forked River, N.J. Low-flow partial-record station 13

01408100 North Branch Metedeconk River at Lakewood, N.J. Low-flow partial-record station 13

01408120 North Branch Metedeconk River near Lakewood, N.J. Continuous-record gaging station 13

01467070 North Branch Pennsauken Creek at Maple Shade, N.J. Low-flow partial-record station 18

01467005 North Branch Rancocas Creek at Iron Works Park, at Mount 

Holly, N.J.

Low-flow partial-record station 19

01467000 North Branch Rancocas Creek at Pemberton, N.J. Continuous-record gaging station 19

01399120 North Branch Raritan River at Burnt Mills, N.J. Low-flow partial-record station 08

01399830 North Branch Raritan River at North Branch, N.J. Gaging station analyzed as a 

partial-record station

08

01398260 North Branch Raritan River near Chester, N.J. Low-flow partial-record station 08

01400000 North Branch Raritan River near Raritan, N.J. Continuous-record gaging station 08

01464380 North Run at Cookstown, N.J. Low-flow partial-record station 20

01378430 Norwood Brook at Norwood, N.J. Low-flow partial-record station 05

01404400 Oakeys Brook near Patricks Corner, N.J. Low-flow partial-record station 09

01477510 Oldmans Creek at Porches Mill, N.J. Low-flow partial-record station 18

01465965 Ong Run at Browns Mills, N.J. Low-flow partial-record station 19

01410000 Oswego River at Harrisville, N.J. Continuous-record gaging station 14

01409970 Oswego River at Oswego Lake, N.J. Low-flow partial-record station 14

01409095 Oyster Creek near Brookville, N.J. Gaging station analyzed as a 

partial-record station

13

01409100 Oyster Creek near Waretown, N.J. Low-flow partial-record station 13

01411680 Palatine Branch at Palatine, N.J. Low-flow partial-record station 17

01367800 Papakating Creek at Pellettown, N.J. Low-flow partial-record station 02

01367910 Papakating Creek at Sussex, N.J. Low-flow partial-record station 02

01476640 Pargey Creek at Swedesboro Avenue at Repaupo, N.J. Low-flow partial-record station 18

01467010 Parkers Creek near Mount Laurel, N.J. Low-flow partial-record station 19

01377300 Pascack Brook at Pearl River, N.Y. Low-flow partial-record station 25

01377500 Pascack Brook at Westwood, N.J. Continuous-record gaging station Yes 05

01379570 Passaic River at Hanover, N.J. Low-flow partial-record station 06

01389500 Passaic River at Little Falls, N.J. Continuous-record gaging station Yes 04

01378700 Passaic River at outlet of Osborn Pond, N.J. Low-flow partial-record station 06

01381900 Passaic River at Pine Brook, N.J. Low-flow partial-record station Yes 06

01389110 Passaic River at Route 46, at Singac, N.J. Low-flow partial-record station 04

01379300 Passaic River at Stirling, N.J. Low-flow partial-record station 06

01382000 Passaic River at Two Bridges, N.J. Low-flow partial-record station 06

01378690 Passaic River near Bernardsville, N.J. Gaging station analyzed as a 

partial-record station

06

01379500 Passaic River near Chatham, N.J. Continuous-record gaging station Yes 06

88 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Table 1-2.  Index, by station name, of selected continuous-record streamflow-gaging stations, low-flow partial-record stations, and

gaging stations analyzed as a partial-record stations in New Jersey, New York, and Pennsylvania.—Continued

[Stations are listed in downstream order; ID, identification number]

Station ID Station name Station type Regulation

Watershed 

Management Area

01379000 Passaic River near Millington, N.J. Continuous-record gaging station Yes 06

01443500 Paulins Kill at Blairstown, N.J. Continuous-record gaging station 01

01443300 Paulins Kill at Lafayette, N.J. Low-flow partial-record station 01

01443460 Paulins Kill at Paulins Kill, N.J. Low-flow partial-record station 01

01443450 Paulins Kill near Newton, N.J. Low-flow partial-record station 01

01398850 Peapack Brook at Far Hills, N.J. Low-flow partial-record station 08

01398700 Peapack Brook at Gladstone, N.J. Low-flow partial-record station 08

01389534 Peckman River at Ozone Avenue, at Verona, N.J. Low-flow partial-record station 04

01389600 Peckman River at West Paterson, N.J. Low-flow partial-record station 04

01400596 Peddie Brook at Hightstown, N.J. Low-flow partial-record station 10

01411020 Penny Pot Stream near Folsom, N.J. Low-flow partial-record station 15

01382500 Pequannock River at Macopin Intake Dam, N.J. Continuous-record gaging station Yes 03

01382800 Pequannock River at Riverdale, N.J. Gaging station analyzed as a 

partial-record station

03

01382050 Pequannock River near Stockholm, N.J. Low-flow partial-record station 03

01382550 Pequannock River Tributary 1 at Kinnelon, N.J. Low-flow partial-record station 03

01446400 Pequest River at Belvidere, N.J. Low-flow partial-record station 01

01445000 Pequest River at Huntsville, N.J. Continuous-record gaging station 01

01445500 Pequest River at Pequest, N.J. Continuous-record gaging station 01

01445430 Pequest River at Townsbury, N.J. Gaging station analyzed as a 

partial-record station

01

01400300 Peters Brook near Raritan, N.J. Gaging station analyzed as a 

partial-record station

Yes 10

01401650 Pike Run at Belle Mead, N.J. Continuous-record gaging station 10

01401700 Pike Run near Rocky Hill, N.J. Low-flow partial-record station 10

01405210 Pine Brook at Clarks Mills, N.J. Low-flow partial-record station 09

01398075 Pleasant Run at Centerville, N.J. Low-flow partial-record station 08

01369000 Pochuck Creek near Pine Island, N.Y. Continuous-record gaging station 23

01455300 Pohatcong Creek at Carpentersville, N.J. Low-flow partial-record station 01

01455200 Pohatcong Creek at New Village, N.J. Gaging station analyzed as a 

partial-record station

01

01455135 Pohatcong Creek at Tunnel Hill Road, near Washington, N.J. Low-flow partial-record station 01

01407780 Polly Pond Brook at South Belmar, N.J. Low-flow partial-record station 12

01467057 Pompeston Creek at Cinnaminson, N.J. Low-flow partial-record station 18

01388500 Pompton River at Pompton Plains, N.J. Continuous-record gaging station Yes 03

01389000 Pompton River at Two Bridges, N.J. Low-flow partial-record station 06

01387884 Pond Brook at US Route 202 at Oakland, N.J. Low-flow partial-record station 03

01463980 Pond Run at Trenton, N.J. Low-flow partial-record station 11

01446520 Pophandusing Brook at Belvidere, N.J. Low-flow partial-record station 01

Appendix 1 89
Table 1-2.  Index, by station name, of selected continuous-record streamflow-gaging stations, low-flow partial-record stations, and

gaging stations analyzed as a partial-record stations in New Jersey, New York, and Pennsylvania.—Continued

[Stations are listed in downstream order; ID, identification number]

Station ID Station name Station type Regulation

Watershed 

Management Area

01407628 Poplar Brook near Deal, N.J. Low-flow partial-record station 12

01407532 Poricy Brook at Red Bank, N.J. Low-flow partial-record station 12

01397100 Prescott Brook at Round Valley, N.J. Low-flow partial-record station 08

01378800 Primrose Brook near New Vernon, N.J. Low-flow partial-record station 06

01409407 Pump Branch near Blue Anchor, N.J. Low-flow partial-record station 14

01409408 Pump Branch near Waterford Works, N.J. Low-flow partial-record station 14

01477110 Raccoon Creek at Mullica Hill, N.J. Low-flow partial-record station 18

01477100 Raccoon Creek near Mullica Hill, N.J. Low-flow partial-record station 18

01477120 Raccoon Creek near Swedesboro, N.J. Continuous-record gaging station 18

01413080 Raccoon D at Davis Mill, N.J. Low-flow partial-record station 17

01395000 Rahway River at Rahway, N.J. Continuous-record gaging station Yes 07

01394500 Rahway River near Springfield, N.J. Continuous-record gaging station Yes 07

01388000 Ramapo River at Pompton Lakes, N.J. Continuous-record gaging station Yes 03

01387400 Ramapo River at Ramapo, N.Y. Continuous-record gaging station Yes 24

01387420 Ramapo River at Suffern, N.Y. Continuous-record gaging station Yes 24

01387670 Ramapo River near Darlington, N.J. Low-flow partial-record station 03

01387500 Ramapo River near Mahwah, N.J. Continuous-record gaging station 03

01387930 Ramapo River Tributary No. 5 at Oakland, N.J. Low-flow partial-record station 03

01390900 Ramsey Brook at Allendale, N.J. Low-flow partial-record station 04

01400500 Raritan River at Manville, N.J. Continuous-record gaging station Yes 09

01403060 Raritan River below Calco Dam at Bound Brook, N.J. Continuous-record gaging station Yes 09

01408490 Ridgeway Branch near Lakehurst, N.J. Low-flow partial-record station 13

01384500 Ringwood Creek near Wanaque, N.J. Continuous-record gaging station 03

01395500 Robinsons Branch at Goodmans, N.J. Gaging station analyzed as a 

partial-record station

07

01396000 Robinsons Branch at Rahway, N.J. Continuous-record gaging station 07

01401590 Rock Brook at Blawenburg, N.J. Low-flow partial-record station 10

01399570 Rockaway Creek at McCrea Mills, N.J. Low-flow partial-record station 08

01399700 Rockaway Creek at Whitehouse, N.J. Gaging station analyzed as a 

partial-record station

08

01380500 Rockaway River above Reservoir at Boonton, N.J. Continuous-record gaging station 06

01379700 Rockaway River at Berkshire Valley, N.J. Gaging station analyzed as a 

partial-record station

06

01379750 Rockaway River at Dover, N.J. Low-flow partial-record station 06

01381200 Rockaway River at Pine Brook, N.J. Low-flow partial-record station 06

01381000 Rockaway River below Reservoir at Boonton, N.J. Continuous-record gaging station Yes 06

01400593 Rocky Brook at Hightstown, N.J. Low-flow partial-record station 10

01402700 Royce Brook at Manville, N.J. Low-flow partial-record station 10

90 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Table 1-2.  Index, by station name, of selected continuous-record streamflow-gaging stations, low-flow partial-record stations, and

gaging stations analyzed as a partial-record stations in New Jersey, New York, and Pennsylvania.—Continued

[Stations are listed in downstream order; ID, identification number]

Station ID Station name Station type Regulation

Watershed 

Management Area

01402590 Royce Brook Tributary at Frankfort, N.J. Gaging station analyzed as a 

partial-record station

10

01402600 Royce Brook Tributary near Belle Mead, N.J. Continuous-record gaging station 10

01379630 Russia Brook Tributary at Milton, N.J. Gaging station analyzed as a 

partial-record station

06

01391500 Saddle River at Lodi, N.J. Continuous-record gaging station Yes 04

01391110 Saddle River at Paramus, N.J. Low-flow partial-record station 04

01390500 Saddle River at Ridgewood, N.J. Continuous-record gaging station 04

01390450 Saddle River at Upper Saddle River, N.J. Low-flow partial-record station 04

01482520 Salem River at Sharptown, N.J. Low-flow partial-record station 17

01482500 Salem River at Woodstown, N.J. Continuous-record gaging station Yes 17

01474500 Schuylkill River at Philadelphia, Pa. Continuous-record gaging station Yes 26

01411462 Scotland Run at Franklinville, N.J. Low-flow partial-record station 17

01411461 Scotland Run at Fries Mill, N.J. Low-flow partial-record station 17

01411460 Scotland Run near Williamstown, N.J. Low-flow partial-record station 17

01392500 Second River at Belleville, N.J. Continuous-record gaging station 04

01463750 Shabakunk Creek at Ewingville, N.J. Low-flow partial-record station 11

01407700 Shark River at Glendola, N.J. Low-flow partial-record station 12

01407705 Shark River near Neptune City, N.J. Continuous-record gaging station Yes 12

01465884 Sharps Run at Route 541 at Medford, N.J. Low-flow partial-record station 19

01438400 Shimers Brook near Montague, N.J. Low-flow partial-record station 01

01463670 Shipetaukin Creek at Bakersville, N.J. Low-flow partial-record station 11

01463650 Shipetaukin Creek at Lawrenceville, N.J. Low-flow partial-record station 11

01396865 Sidney Brook at Grandin, N.J. Low-flow partial-record station 08

01389100 Singac Brook at Singac, N.J. Low-flow partial-record station 04

01401900 Six Mile Run at Blackwells Mills, N.J. Low-flow partial-record station 10

0140940360 Sleeper Branch above diversion, near Atsion, N.J. Low-flow partial-record station 14

01409406 Sleeper Branch at Batsto, N.J. Low-flow partial-record station 14

01409404 Sleeper Branch at Us Rt 206 near Atsion, N.J. Low-flow partial-record station 14

0140940370 Sleeper Branch near Atsion, N.J. Low-flow partial-record station 14

01411430 Sluice Creek at Clermont, N.J. Low-flow partial-record station 16

01411434 Sluice Creek at outlet Clint Mill Pond at South Dennis, N.J. Low-flow partial-record station 16

01467329 South Branch Big Timber Creek at Blackwood Terrace, N.J. Low-flow partial-record station 18

01467330 South Branch Big Timber Creek at Blackwood, N.J. Low-flow partial-record station 18

01409080 South Branch Forked River near Forked River, N.J. Low-flow partial-record station 13

01408140 South Branch Metedeconk River at Lakewood, N.J. Gaging station analyzed as a 

partial-record station

13

01408150 South Branch Metedeconk River near Lakewood, N.J. Gaging station analyzed as a 

partial-record station

13

Appendix 1 91
Table 1-2.  Index, by station name, of selected continuous-record streamflow-gaging stations, low-flow partial-record stations, and

gaging stations analyzed as a partial-record stations in New Jersey, New York, and Pennsylvania.—Continued

[Stations are listed in downstream order; ID, identification number]

Station ID Station name Station type Regulation

Watershed 

Management Area

01467315 South Branch Newton Creek at Glover Av at Haddon 

Heights, N.J.

Low-flow partial-record station 18

01467317 South Branch Newton Creek at Haddon Heights, N.J. Low-flow partial-record station 18

01467081 South Branch Pennsauken Creek at Cherry Hill, N.J. Continuous-record gaging station 18

01467080 South Branch Pennsauken Creek at Maple Shade, N.J. Low-flow partial-record station 18

01477118 South Branch Raccoon Creek near Mullica Hill, N.J. Low-flow partial-record station 18

01396030 South Branch Rahway River at Colonia, N.J. Low-flow partial-record station 07

01465850 South Branch Rancocas Creek at Vincentown, N.J. Gaging station analyzed as a 

partial-record station

19

01396535 South Branch Raritan River at Arch Street at High Bridge, N.J. Low-flow partial-record station 08

01396120 South Branch Raritan River at Bartley, N.J. Low-flow partial-record station 08

01396350 South Branch Raritan River at Califon, N.J. Low-flow partial-record station 08

01396190 South Branch Raritan River at Four Bridges, N.J. Gaging station analyzed as a 

partial-record station

08

01396280 South Branch Raritan River at Middle Valley, N.J. Low-flow partial-record station 08

01396090 South Branch Raritan River at outlet of Budd Lake, N.J. Low-flow partial-record station 08

01398102 South Branch Raritan River at South Branch, N.J. Low-flow partial-record station 08

01397000 South Branch Raritan River at Stanton, N.J. Continuous-record gaging station Yes 08

01396500 South Branch Raritan River near High Bridge, N.J. Continuous-record gaging station 08

01396070 South Branch Raritan River Tributary 6 at Budd Lake, N.J. Low-flow partial-record station 08

01396080 South Branch Raritan River Tributary 7 at Budd Lake, N.J. Low-flow partial-record station 08

01399670 South Branch Rockaway Creek at Whitehouse Station, N.J. Continuous-record gaging station 08

01399690 South Branch Rockaway Creek at Whitehouse, N.J. Low-flow partial-record station 08

01399600 South Branch Rockaway Creek Tributary at Lebanon, N.J. Low-flow partial-record station 08

01405500 South River at Old Bridge, N.J. Continuous-record gaging station Yes 09

01411220 South River near Belcoville, N.J. Low-flow partial-record station 15

01465900 Southwest Branch Rancocas at Eayerstown, N.J. Low-flow partial-record station 19

01465880 Southwest Branch Rancocas Creek at Medford, N.J. Low-flow partial-record station 19

01409460 Springers Brook near Atsion, N.J. Low-flow partial-record station 14

01409450 Springers Brook near Indian Mills, N.J. Low-flow partial-record station 14

01391485 Sprout Brook at Rochelle Park, N.J. Low-flow partial-record station 04

01396800 Spruce Run at Clinton, N.J. Continuous-record gaging station Yes 08

01396580 Spruce Run at Glen Gardner, N.J. Continuous-record gaging station 08

01396550 Spruce Run at Newport, N.J. Low-flow partial-record station 08

01396600 Spruce Run near Clinton, N.J. Low-flow partial-record station 08

01396588 Spruce Run near Glen Gardner, N.J. Low-flow partial-record station 08

01396590 Spruce Run near High Bridge, N.J. Low-flow partial-record station 08

01410865 Squankum Branch at Malaga Road, near Williamstown, N.J. Low-flow partial-record station 15

92 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Table 1-2.  Index, by station name, of selected continuous-record streamflow-gaging stations, low-flow partial-record stations, and

gaging stations analyzed as a partial-record stations in New Jersey, New York, and Pennsylvania.—Continued

[Stations are listed in downstream order; ID, identification number]

Station ID Station name Station type Regulation

Watershed 

Management Area

01410855 Squankum Brook above sewage treatment plant, at 

Williamstown, N.J.

Low-flow partial-record station 15

01387520 Stag Brook near Mahwah, N.J. Low-flow partial-record station 03

01411450 Still Run at Aura, N.J. Low-flow partial-record station 17

01476600 Still Run near Mickleton, N.J. Gaging station analyzed as a 

partial-record station

18

01382700 Stone House Brook at Kinnelon, N.J. Low-flow partial-record station 03

01401100 Stony Brook at Clarksville, N.J. Low-flow partial-record station 10

01400900 Stony Brook at Glenmoore, N.J. Low-flow partial-record station 10

01396220 Stony Brook at Naughright, N.J. Low-flow partial-record station 08

01400947 Stony Brook at Pennington, N.J. Low-flow partial-record station 10

01401000 Stony Brook at Princeton, N.J. Continuous-record gaging station 10

01403540 Stony Brook at Watchung, N.J. Continuous-record gaging station 09

01442800 Stony Brook near Columbia, N.J. Low-flow partial-record station 01

01380300 Stony Brook near Rockaway Valley, N.J. Low-flow partial-record station 06

01413050 Stow Creek at Jericho, N.J. Low-flow partial-record station 17

01399194 Succasunna Brook near Succasunna, N.J. Low-flow partial-record station 08

01407500 Swimming River near Red Bank, N.J. Continuous-record gaging station Yes 12

01399295 Tanners Brook near Milltown, N.J. Low-flow partial-record station 08

01411299 Tarkiln Brook near Head of River, N.J. Low-flow partial-record station 15

01401800 Ten Mile Run near Blackwells Mills, N.J. Low-flow partial-record station 10

01378385 Tenakill Brook at Closter, N.J. Low-flow partial-record station 05

01378350 Tenakill Brook at Cresskill, N.J. Low-flow partial-record station 05

01406500 Tennent Brook near Browntown, N.J. Gaging station analyzed as a 

partial-record station

09

01397900 Third Neshanic River near Ringoes, N.J. Low-flow partial-record station 08

01392200 Third River at Nutley, N.J. Low-flow partial-record station 04

01392210 Third River at Passaic, N.J. Continuous-record gaging station 04

01464525 Thorton Creek at Bordentown,, N.J. Gaging station analyzed as a 

partial-record station

20

01407970 Timber Swamp Creek near Farmingdale, N.J. Low-flow partial-record station 12

01408300 Toms River at Whitesville, N.J. Low-flow partial-record station 13

01408500 Toms River near Toms River, N.J. Continuous-record gaging station 13

01407102 Town Brook at Church Street, at New Monmouth, N.J. Low-flow partial-record station 12

01443475 Trout Brook near Middleville, N.J. Low-flow partial-record station 01

01381700 Troy Brook at Troy Hills, N.J. Low-flow partial-record station 06

01411300 Tuckahoe River at Head of River, N.J. Continuous-record gaging station 15

01409780 Tulpehocken Creek near Jenkins, N.J. Low-flow partial-record station 14

01408440 Union Brook at Lakehurst, N.J. Low-flow partial-record station 13

Appendix 1 93
Table 1-2.  Index, by station name, of selected continuous-record streamflow-gaging stations, low-flow partial-record stations, and

gaging stations analyzed as a partial-record stations in New Jersey, New York, and Pennsylvania.—Continued

[Stations are listed in downstream order; ID, identification number]

Station ID Station name Station type Regulation

Watershed 

Management Area

01399510 Upper Cold Brook near Pottersville, N.J. Continuous-record gaging station 08

01390800 Valentine Brook at Allendale, N.J. Low-flow partial-record station 04

01394400 Van Winkle Brook at Springfield, N.J. Low-flow partial-record station 07

01440100 Vancampens Brook near Millbrook, N.J. Low-flow partial-record station 01

01407070 Waackaack Creek near Keansburg, N.J. Low-flow partial-record station 12

01367700 Wallkill River at Franklin, N.J. Low-flow partial-record station 02

01367620 Wallkill River at outflow of Lake Mohawk at Sparta, N.J. Low-flow partial-record station 02

01367770 Wallkill River near Sussex, N.J. Low-flow partial-record station 02

01368000 Wallkill River near Unionville, N.Y. Continuous-record gaging station 02

01397500 Walnut Brook near Flemington, N.J. Continuous-record gaging station 08

01383500 Wanaque River at Awosting, N.J. Continuous-record gaging station Yes 03

01384000 Wanaque River at Monks, N.J. Continuous-record gaging station Yes 03

01387000 Wanaque River at Wanaque, N.J. Continuous-record gaging station Yes 03

01381490 Watnong Brook at Morris Plains, N.J. Low-flow partial-record station 06

01368810 Wawayanda Creek at New Milford, N.Y. Low-flow partial-record station 23

01392000 Weasel Brook at Clifton, N.J. Continuous-record gaging station Yes 04

01408800 Webbs Mill Branch near Whiting, N.J. Low-flow partial-record station 13

01408810 Webbs Mill Branch Tributary near Whiting, N.J. Low-flow partial-record station 13

01455370 Weldon Brook at Hurdtown, N.J. Low-flow partial-record station 01

01455350 Weldon Brook near Woodport, N.J. Low-flow partial-record station 01

01410200 West Branch Bass River near New Gretna, N.J. Low-flow partial-record station 14

01412500 West Branch Cohansey River at Seeley, N.J. Gaging station analyzed as a 

partial-record station

Yes 17

01393350 West Branch Elizabeth River near Union, N.J. Low-flow partial-record station 07

01403150 West Branch Middle Brook near Martinsville, N.J. Continuous-record gaging station Yes 09

01403160 West Branch Middle Brook near Somerville, N.J. Gaging station analyzed as a 

partial-record station

09

01367850 West Branch Papakating Creek at McCoys Corner, N.J. Low-flow partial-record station 02

01394000 West Branch Rahway River at Millburn, N.J. Gaging station analyzed as a 

partial-record station

Yes 07

01463790 West Branch Shabakunk Creek near Ewingville, N.J. Low-flow partial-record station 11

01409815 West Branch Wading River at Maxwell, N.J. Low-flow partial-record station 14

01409730 West Branch Wading River near Chatsworth, N.J. Low-flow partial-record station 14

01409800 West Branch Wading River near Harrisville, N.J. Low-flow partial-record station 14

01409810 West Branch Wading River near Jenkins, N.J. Continuous-record gaging station 14

01381750 West Brook at Troy Hills, N.J. Low-flow partial-record station 06

01386000 West Brook near Wanaque, N.J. Continuous-record gaging station 03

01411445 West Creek near Eldora, N.J. Low-flow partial-record station 16

94 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Table 1-2.  Index, by station name, of selected continuous-record streamflow-gaging stations, low-flow partial-record stations, and

gaging stations analyzed as a partial-record stations in New Jersey, New York, and Pennsylvania.—Continued

[Stations are listed in downstream order; ID, identification number]

Station ID Station name Station type Regulation

Watershed 

Management Area

01411444 West Creek near Leesburg, N.J. Low-flow partial-record station 16

01409280 Westecunk Creek at Stafford Forge, N.J. Gaging station analyzed as a 

partial-record station

13

01407618 Whale Pond Brook near Oakhurst, N.J. Low-flow partial-record station 12

01381500 Whippany River at Morristown, N.J. Continuous-record gaging station 06

01381400 Whippany River near Morristown, N.J. Gaging station analyzed as a 

partial-record station

06

01381800 Whippany River near Pine Brook, N.J. Gaging station analyzed as a 

partial-record station

06

01381600 Whippany River near Whippany, N.J. Low-flow partial-record station 06

01411047 Whitehall Branch below Victory Lakes, near Cecil, N.J. Low-flow partial-record station 15

01411042 Whitehall Branch near Cecil, N.J. Low-flow partial-record station 15

01461300 Wickecheoke Creek at Stockton, N.J. Low-flow partial-record station 11

01409403 Wildcat Branch at Chesilhurst, N.J. Low-flow partial-record station 14

0140940310 Wildcat Branch near Chesilhurst, N.J. Low-flow partial-record station 14

01407250 Willow Brook at Holmdel, N.J. Low-flow partial-record station 12

01378615 Wolf Creek at Ridgefield, N.J. Low-flow partial-record station 05

01400850 Woodsville Brook at Woodsville, N.J. Low-flow partial-record station 10

01408592 Wrangel Brook at Mule Road, near Toms River, N.J. Low-flow partial-record station 13

01407800 Wreck Pond Brook near Spring Lake, N.J. Low-flow partial-record station 12

01443900 Yards Creek near Blairstown, N.J. Continuous-record gaging station Yes 01

01407400 Yellow Brook at Colts Neck, N.J. Low-flow partial-record station 12

Appendix 1 95

Appendix 2
Figure 2-1.  Location of streamflow-gaging stations in Watershed Management Area 1 (Upper Delaware) in New Jersey and in

New York.

Flat

Brook

Paulins

Kill

Pequest

R vi er

Pohatcong

Cr

Musconetcong

River

Lake

Hopatcong

Delaware

River

WMA 2

WMA 3

WMA 11

WMA 6

01439920

01455135

01455350

01457400

01443280

01442760

01445160

01455355

01455160

01445430

01446400

01453000

01434000

01437500

01456210

01456100

01456080

01455780

01455550

01455300

01455230

01455100

01446568

01446520

01445900 01445800

01445520

01445490

01445200

01443510

01443475

01443460

01443450

01443409

01443400

01443300

01443275

01443260

01442800

01440100

01439920

01439900

01439800

01438400

01438090

01457500

01457000

01456000

01455500

01446000

01445500

01445000

01443900

01443500

01440200

01376800

01455200

01440000

01455360

01455370

NEW YORK

PENNSYLVANIA DELAWARE

ATLANTIC OCEAN

41°

40°

39°

75° 74°

Upper Delaware

Watershed Management Area 1

Base from U.S. Geological Survey

digital line graph files, 1:24,000

75°15’ 75° 74°45’ 74°30’

40°

45’

41°

41°

15’

0 5 10 MILES

0 5 10 KILOMETERS

NEW YORK

PENNSYLVANIA

Continuous-record stationgreater than or equal to 20 

years of record

Partial-record station

Station identification 

number

Watershed Management Area

(WMA) boundary and number

(From N.J. Department of

Environmental Protection,

1:24,000 digital line graph

file, 2000)

Continuous-record station10-19 years of record

01440000

WMA 2 

EXPLANATION

0 10 20 MILES

0 10 20 KILOMETERS

WMA 1

98 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Figure 2-2.  Location of streamflow-gaging stations in Watershed Management Area 2 (Wallkill) in New Jersey and in

New York.

Wallkill

River

Papakating

Cr

Black

Cr

Cl ove Br

Pochuck

Cr

Wal kl ill River

WMA 6

WMA 1

WMA 3

01368820

01368840

01368810

01367910

01369000

01368950

01367900

01367890

01367850

01367800

01367770

01367750

01367700

01367620

01368000

NEW YORK

PENNSYLVANIA DELAWARE

41°

40°

39°

75° 74°

ATLANTIC 

OCEAN

0 10 20 MILES

0 10 20 KILOMETERS

WMA 2

Wallkill

Watershed Management Area 2

Base from U.S. Geological Survey

digital line graph files, 1:24,000

41°

41°

10’

41°

20’

74°40’ 74°20’

0 2.5 5 KILOMETERS

0 2.5 5 MILES

NEW YORK

PENNSYLVANIA

EXPLANATION

WMA 3 

01367700

Watershed Management Area

(WMA) boundary and number

(From N.J. Department of

Environmental Protection,

1:24,000 digital line graph

file, 2000)

Continuous-record stationgreater than or equal to 20

years of record

Partial-record station

Station identification number

74°30’

Appendix 2 99
Figure 2-3.  Location of streamflow-gaging stations in Watershed Management Area 3 (Pompton, Wanaque, Ramapo) in

New Jersey and in New York.

Ramapo

River

River

Pe quannock

River

Pompton

WMA 2

WMA 4

WMA 6

01387480

01387450

01382800

01388720

01385500

01387400

01387420

01388700

01387980

01387950 01387930

01387880

01387700

01387670

01387600

01387520

01387490

01382990

01382960

01382910

01382890

01382880 01382870

01382700

01382550

01382450

01382360

01382050

01388500

01388000

01387500

01387000

01386500

01386000

01385000

01384500

01384000

01383500

01382500

NEW YORK

PENNSYLVANIA DELAWARE

41°

40°

39°

75° 74°

ATLANTIC OCEAN

0 10 20 MILES

0 10 20 KILOMETERS

Pompton, Wanaque, Ramapo

Watershed Management Area 3

74°30’ 74°15’

41°

41°

15’

Base from U.S. Geological Survey

digital line graph files, 1:24,000

0 2.5 5 MILES

0 2.5 5 KILOMETERS

EXPLANATION

WMA 2

01388500

Watershed Management Area

(WMA) boundary and number

(From N.J. Department of

Environmental Protection,

1:24,000 digital line graph

file, 2000)

Continuous-record stationgreater than or equal to 20

years of record

Partial-record station

Station identification number

NEW YORK

WMA 2

100 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Figure 2-4.  Location of streamflow-gaging stations in Watershed Management Area 4 (Lower Passaic and Saddle) in

New Jersey.

NEW YORK

WMA 3

WMA 5

WMA 7

WMA 6

Passaic

River

Saddle

River

Passaic

River

Hohokus

Br

Hackensack

River

01392200

01391485

01391110

01390900

01390800

01390700

01390450

01389905

01389850

01389790

01389765

01389600

01389534

01389140

01389110

01389100

01392500

01392210

01392000

01391500

01391000

01390500

01389500

NEW YORK

PENNSYLVANIA DELAWARE

41°

40°

39°

75° 74°

ATLANTIC OCEAN

0 10 20 MILES

0 10 20 KILOMETERS

Lower Passaic and Saddle

Watershed Management Area 4

74°15’ 74°

40°

45’

41°

Base from U.S. Geological Survey

digital line graph files, 1:24,000

0 2.5 5 KILOMETERS

0 2.5 5 MILES

EXPLANATION

Watershed Management

Area (WMA) boundary 

and number (From N.J. 

Department of 

Environmental Protection,

1:24,000 digital line graph

file, 2000)

Continuous-record stationgreater than or equal to 20

years of record

Partial-record station

Station identification number

WMA 6

01389500

WMA 4

Appendix 2 101
Figure 2-5.  Location of streamflow-gaging stations in Watershed Management Area 5 (Hackensack and Pascack) in

New Jersey and in New York.

Hackensack

R vi er

Passaic

River

Hackensack

R vi er

Tenakill B r

Pascack

Br

01377300

01376800

01378500

01377500

01377000

01378615

01378590

01378560

01378520

01378430

01378410

01378385

01377475

01378530

01378350

NEW YORK

PENNSYLVANIA DELAWARE

41°

40°

39°

75° 74°

ATLANTIC 

OCEAN

0 10 20 MILES

0 10 20 KILOMETERS

WMA 5

Hackensack and Pascack

Water Management Area 5

Base from U.S. Geological Survey

digital line graph files, 1:24,000

0 2.5 5 MILES

0 2.5 5 KILOMETERS

NEW YORK

74°7’30" 74° 73°52’30"

40°

45’

40°

52’

30"

41°

WMA 4

WMA 7

WMA 3

EXPLANATION

Watershed Management

Area (WMA) boundary and 

number (From N.J. Department of Environmental

Protection, 1:24,000 digital 

line graph file, 2000)

Continuous-record stationgreater than or equal to 20 

years of record

Partial-record station

Station identification number

WMA 4

01378500

102 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Figure 2-6.  Location of streamflow-gaging stations in Watershed Management Area 6 (Upper Passaic, Whippany,

and Rockaway) in New Jersey.

WMA 3

WMA 2

WMA 1

WMA 1

WMA 8

WMA 9

WMA 4

WMA 7

Passaic

Ri

Whippany

River

Rockaway

Riv

Green

Pond

Br

01380100

01379630

01381900

01381500

01381000

01380500

01380000

01379500

01379000

01379790

01379780

01379700

01379773

01389000

01382000

01381750 01381800

01381700

01381600

01381550

01381490

01381470

01381400

01381200

01381150

01380300

01380050

01379750

01379570

01379525

01379300

01379200

01379150

01378900

01378850

01378800

01378750

01378700

01378690

NEW YORK

PENNSYLVANIA DELAWARE

41°

40°

39°

75° 74°

ATLANTIC OCEAN

0 10 20 MILES

0 10 20 KILOMETERS

WMA 

6

Upper Passaic, Whippany, and Rockaway

Watershed Management Area 6

Base from U.S. Geological Survey

digital line graph files, 1:24,000

74°30’ 74°15’

40°

45’

41°

EXPLANATION

Watershed Management 

Area (WMA) boundary

and number (From N.J. 

Department of 

Environmental Protection,

1:24,000 digital line graph

file, 2000)

Continuous-record station10-19 years of record

Continuous-record stationgreater than or equal to 20

years of record

Partial-record station

Station identification 

number

WMA 4

01380500

0 2.5 5 KILOMETERS

0 2.5 5 MILES

Appendix 2 103
Figure 2-7.  Location of streamflow-gaging stations in Watershed Management Area 7 (Arthur Kill) in New Jersey.

NEWARK BAY

RARITAN BAY

Elizabeth

Rive r

Rahway

River

Raritan

River

Ra hway

SB

Hackensack

River

Passaic

R vi er

WMA 6

WMA 4

WMA 5

WMA 9

WMA 12

WMA 7

01393800

01393000

01395500

01396000

01395000

01394500

01393450

01396030

01394600

01394400

01394000

01393890

01393350

01393200

NEW YORK

PENNSYLVANIA DELAWARE

41°

40°

39°

75° 74°

ATLANTIC OCEAN

0 10 20 MILES

0 10 20 KILOMETERS

WMA 

7

Arthur Kill

Watershed Management Area 7

74°20’ 74°10’

40°

30’

40°

40’

40°

50’

Base from U.S. Geological Survey

digital line graph files, 1:24,000

STATEN ISLAND

0 2.5 5 MILES

0 2.5 5 KILOMETERS

EXPLANATION

Watershed Management Area

(WMA) boundary and number

(From N.J. Department of

Environmental Protection,

1:24,000 digital line graph

file, 2000)

Continuous-record station10-19 years of record

Continuous-record stationgreater than or equal to 20

years of record

Partial-record station

Station identification 

number

WMA 4

01396000

104 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Figure 2-8.  Location of streamflow-gaging stations in Watershed Management Area 8 (North and South Branch Raritan) in

New Jersey.

Lamington

Run

Raritan

River

Rockaway

Cr

N Br

Rari at n

R vi er

Raritan

River

WMA 1

WMA 11

WMA 6

WMA 9

WMA 10

01399690

01399830

01399120

01396588

01396535

01396550

01396190

01398102

01400000

01399670

01399510 01399500

01398500

01398000

01397500

01397000

01396660 01396800

01396580

01396500

01399525

01399200

01399190

01398107

01398045

01399900

01399820 01399700 01399600

01399570

01399540

01399300

01399295

01399194

01399100

01398950

01398850

01398700

01398360

01398300

01398260

01398220

01398075

01397900 01398052

01397800

01397290

01397100

01396900

01396865

01396700

01396670 01396600

01396590

01396350

01396280

01396240

01396220

01396120

01396090

01396080

01396070

01396180

NEW YORK

PENNSYLVANIA DELAWARE

41°

40°

39°

75° 74°

ATLANTIC OCEAN

0 10 20 MILES

0 10 20 KILOMETERS

WMA 

8

North and South Branch Raritan 

Watershed Management Area 8

Base from U.S. Geological Survey

digital line graph files, 1:24,000

75° 74°45’

40°

30’

40°

45’

0 2.5 5 MILES

0 2.5 5 KILOMETERS

EXPLANATION

Watershed Management Area

(WMA) boundary and number

(From N.J. Department of

Environmental Protection,

1:24,000 digital line graph

file, 2000)

Continuous-record station10-19 years of record

Continuous-record stationgreater than or equal to 20 

years of record

Partial-record station

Station identification 

number

WMA 1

01397000

Appendix 2 105
Figure 2-9.  Location of streamflow-gaging stations in Watershed Management Area 9 (Lower Raritan, South River and

Lawrence) in New Jersey.

RARITAN BAY

Green

Br

Bound

Br

Raritan

River

Lawren ce

Br

South

River

Matchapon i x Br

Deep

Run

WMA 8 WMA 6

WMA 7

WMA 12

WMA 13

WMA 20

WMA 11

WMA 10

01405340

01406500

01404500

01405435

01405302

01406050

01403395

01403385

01403900

01403160

01405500

01405400

01403540

01403535

01403500

01403400

01403150

01403060

01400500

01405300

01405030

01400350

01400300

01406040

01406000

01405470

01405440

01405335

01405290

01405285

01405240

01405210

01405180

01404700

01404470

01404400

01404300

01404180

01404060

01403350

01403330

01403100

01405170

NEW YORK

PENNSYLVANIA DELAWARE

41°

40°

39°

75° 74°

ATLANTIC OCEAN

0 10 20 MILES

0 10 20 KILOMETERS

WMA 

9

Lower Raritan, South River, 

and Lawrence Watershed 

Management Area 9

Base from U.S. Geological Survey

digital line graph files, 1:24,000

74°30’ 74°15’

40°

15’

40°

30’

0 2.5 5 KILOMETERS

0 2.5 5 MILES

EXPLANATION

Watershed Management Area

(WMA) boundary and number

(From N.J. Department of

Environmental Protection,

1:24,000 digital line graph

file, 2000)

Continuous-record station10-19 years of record

Continuous-record stationgreater than or equal to 20 

years of record

Partial-record station

Station identification number

WMA 6

01405030

106 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Figure 2-10.  Location of streamflow-gaging stations in Watershed Management Area 10 (Millstone) in New Jersey.

Royce

Br

Millstone

R vi er

Sto ny

Br

Cranbury

Br

Millstone

River

WMA 8

WMA 9

WMA 6

WMA 7

WMA 11

WMA 20

WMA 13

01402590

01400953

01400932

01401301

01460500

01405000

01402600

01402000 01401650

01401000

01401500

01400730

01402700

01401900

01401700

01401600

01401590

01401520

01401400

01401200

01401100

01400970

01400947

01400900

01400850

01400810

01400800

01400770

01400750

01400725

01400700

01400670

01400640

01400600

01400596 01400593

01400580

01400560

01400540

01401800

01400930

NEW YORK

PENNSYLVANIA DELAWARE

41°

40°

39°

75° 74°

ATLANTIC OCEAN

0 10 20 MILES

0 10 20 KILOMETERS

WMA 

10

Millstone Watershed 

Management Area 10

Base from U.S. Geological Survey

digital line graph files, 1:24,000

74°45’ 74°30’

40°

15’

40°

30’

0 2.5 5 KILOMETERS

0 2.5 5 MILES

EXPLANATION

Watershed Management Area

(WMA) boundary and number

(From N.J. Department of

Environmental Protection,

1:24,000 digital line graph

file, 2000)

Continuous-record station10-19 years of record

Continuous-record stationgreater than or equal to 20 

years of record

Partial-record station

Station identification number

WMA 8

01401500

Appendix 2 107
Figure 2-11.  Location of streamflow-gaging stations in Watershed Management Area 11 (Central Delaware) in New Jersey.

Assunpink

Cr

Miry Run

Delaware

River

WMA 1

WMA 8

WMA 10

WMA 9

WMA 20

WMA 19

WMA 13

WMA 18

01458570

01463620

01463500

01464000

01463830

01463690 01463670

01463650

01462800

01462200

01461900

01461300

01460900

01458700

01458600

01458400

01458100

01463980

01463860

01463790

01463750

NEW YORK

PENNSYLVANIA DELAWARE

41°

40°

39°

75° 74°

ATLANTIC OCEAN

0 10 20 MILES

0 10 20 KILOMETERS

WMA 

11

Base from U.S. Geological Survey

digital line graph files, 1:24,000

75° 74°30’

40°

40°

30’

0 5 10 KILOMETERS

0 5 10 MILES

PENNSYLVANIA

Watershed Management Area

(WMA) boundary and number

(From N.J. Department of

Environmental Protection,

1:24,000 digital line graph

file, 2000)

Continuous-record stationgreater than or equal to 20

years of record

Partial-record station

Station identification number

WMA 1

01462200

EXPLANATION

Central Delaware

Watershed 

Management

Area11

108 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Figure 2-12.  Location of streamflow-gaging stations in Watershed Management Area 12 (Monmouth) in New Jersey.

R A R I T A N B A Y

A T L A N T I C O C E A N

Navesink

River

Waackaack Cr

Yellow

Br

Shark

River

Manasquan

River

Rarita n

River

WMA 13

WMA 9

WMA 10

01407026

01407012

01408000

01407760

01407705

01407500

01407000

01408029

01408030

01408020

01408015

01407970

01407900

01407860

01407830

01407806

01407800

01407780

01407755

01407700

01407636

01407628

01407618

01407532

01407450

01407400

01407300

01407250

01407200

01407102

01407070

01407065

01407055

NEW YORK

PENNSYLVANIA DELAWARE

41°

40°

39°

75° 74°

ATLANTIC OCEAN

0 10 20 MILES

0 10 20 KILOMETERS

WMA 

12

Monmouth

Watershed Management

Area 12

Base from U.S. Geological Survey

digital line graph files, 1:24,000

0 2.5 5 KILOMETERS

0 2.5 5 MILES

74°20’ 74°10’ 74°

40°

10’

40°

20’

WMA 9

01408015

EXPLANATION

Watershed Management Area

(WMA) boundary and number

(From N.J. Department of

Environmental Protection,

1:24,000 digital line graph

file, 2000)

Continuous-record station10-19 years of record

Continuous-record stationgreater than or equal to 20 

years of record

Partial-record station

Station identification number

Appendix 2 109
Figure 2-13.  Location of streamflow-gaging stations in Watershed Management Area 13 (Barnegat Bay) in New Jersey.

Barnegat Bay

Little Egg Harbor

Metedeconk

NB

SB

Metedeconk

River

Toms

River

Wran gel

Br

Cedar

Cr

Oyster Cr

Westecunk

Cr

 A t l a n t i c O c e a n

WMA 12

WMA 14

WMA 19

WMA 10 WMA 9

WMA 20

WMA 11

01408140

01408150

01408830

01409000

01408120

01409095

01408500

01409280

01409300

01409200

01409150

01409080

01409050

01408810

01408800

01408728

01408620

01408592

01408490

01408460

01408440

01408300

01409250

01409100

01408100

NEW YORK

PENNSYLVANIA DELAWARE

41°

40°

39°

75° 74°

ATLANTIC OCEAN

0 10 20 MILES

0 10 20 KILOMETERS

WMA 

13

Barnegat Bay

Watershed 

Management

Area 13

Base from U.S. Geological Survey

digital line graph files, 1:24,000

74°30’ 74°

39°

30’

40°

0 5 10 KILOMETERS

0 5 10 MILES

Watershed Management Area

(WMA) boundary and number

(From N.J. Department of

Environmental Protection,

1:24,000 digital line graph

file, 2000)

Continuous-record station10-19 years of record

Continuous-record stationgreater than or equal to 20 

years of record

Partial-record station

Station identification number

WMA 9

01408500

EXPLANATION

110 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Figure 2-14.  Location of streamflow-gaging stations in Watershed Management Area 14 (Mullica) in New Jersey.

Batsto

River

Wading

River Oswego

River

Mullica

River

 A t l a n t i c O c e a n

Sleeper

Br

WMA 13

WMA 19

WMA 15

WMA 18

01409810

01409800

01409416

0140940360

01410150

01410000

01409500

01409400

01410225

01410215

01410200

01409970

01409780

01409730

01409575

01409460

01409450

01409411

01409410

01409409

01409408

01409407

01409406

01409405

01409404

01409403

01409401

01409395

01409390

01409387

01409375

0140941050

0140940950

0140940370

0140940250

01409815

0140940970

0140940480 0140940310

0140940200

NEW YORK

PENNSYLVANIA DELAWARE

41°

40°

39°

75° 74°

ATLANTIC OCEAN

0 10 20 MILES

0 10 20 KILOMETERS

WMA 

14

Mullica

Watershed Management Area 14

Base from U.S. Geological Survey

digital line graph files, 1:24,000

74°45’ 74°30’

39°

30’

39°

45’

0 5 10 KILOMETERS

0 5 10 MILES

Watershed Management Area

(WMA) boundary and number

(From N.J. Department of

Environmental Protection,

1:24,000 digital line graph

file, 2000)

Continuous-record stationgreater than or equal to 20 

years of record

Partial-record station

Station identification number

WMA 19

01410000

EXPLANATION

Appendix 2 111
Figure 2-15.  Location of streamflow-gaging stations in Watershed Management Area 15 (Great Egg Harbor) in New Jersey.

Deep

Run

Great

Egg

Harbor

Rive

T

r

uckahoe

River

 A t l a n t i c O c e a n

D e l a w a r e

B a y

WMA 14

WMA 18 WMA 19

WMA 13

WMA 17

WMA 16

01411300

01411000

01410500

01411305

01411302

01411299

01411250

01411220

01411200

01411170

01411140

01411053

01411047

01411042

01411040

01411035

01411020

01410865

01410803

01410800

01410784

01410775

01410787

01410810

01410855 01410820

01411110

01411196

NEW YORK

PENNSYLVANIA DELAWARE

41°

40°

39°

75° 74°

ATLANTIC OCEAN

0 10 20 MILES

0 10 20 KILOMETERS

WMA 

15

Great Egg Harbor

Watershed Management Area 15

Base from U.S. Geological Survey

digital line graph files, 1:24,000

75° 74°45’ 74°30’

39°

15’

39°

30’

39°

45’

0 5 10 KILOMETERS

0 5 10 MILES

Watershed Management

Area (WMA) boundary 

and number (From N.J. 

Department of Environmental Protection,

1:24,000 digital line 

graph file, 2000)

Continuous-record

station-greater than or

equal to 20 years of record

Partial-record station

Station identification 

number

WMA 18

01410500

EXPLANATION

112 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Figure 2-16.  Location of streamflow-gaging stations in Watershed Management Area 16 (Cape May) in New Jersey.

 A t l a n t i c O c e a n

D e l a w a r e

B a y

West Cr

Sluice

Cr

WMA 17

WMA 15

01411444

01411445

01411442

01411438

01411434

01411430

01411428

01411418

01411412

01411410

01411408

01411404

01411400

01411388

01411351

NEW YORK

PENNSYLVANIA DELAWARE

41°

40°

39°

75° 74°

ATLANTIC OCEAN

0 10 20 MILES

0 10 20 KILOMETERS

WMA

16

Cape May

Watershed Management Area 16

Base from U.S. Geological Survey

digital line graph files, 1:24,000

75° 74°45’

39°

39°

15’

0 2.5 5 KILOMETERS

0 2.5 5 MILES

Watershed Management Area

(WMA) boundary and number

(From N.J. Department of

Environmental Protection,

1:24,000 digital line graph

file, 2000)

Partial-record station

Station identification number

WMA 15

01411400

EXPLANATION

Appendix 2 113
Figure 2-17.  Location of streamflow-gaging stations in Watershed Management Area 17 (Maurice, Salem, and Cohansey) in

New Jersey.

D e l a w a r e

B a y

Salem

River

Scotland

Run

Alloway

Cr

Cohansey

Rive

Muddy

Run

Manumuskin

River

Maurice

River

Menantico

Cr

De al ware

River

WMA 18

WMA 14

WMA 15

WMA 16

01411955

01411485

01411495

01411466

01483000

01482500

01411500

01412800

01412500

01411456

01412000

01483010

01482950

01482900

01482530

01482520

01482510

01413080

01413060

01413050

01413020 01413010

01412405

01412120

01411950 01412100

01411880

01411850

01411800

01411700

01411680

01411650

01411462

01411460

01411450

01411461

NEW YORK

PENNSYLVANIA DELAWARE

41°

40°

39°

75° 74°

ATLANTIC OCEAN

0 10 20 MILES

0 10 20 KILOMETERS

WMA 

17

Maurice, Salem, 

and Cohansey

Watershed

Management 

Area 17

Base from U.S. Geological Survey

digital line graph files, 1:24,000

75°30’ 75°15’ 75°

39°

15’

39°

30’

39°

45’

0 5 10 KILOMETERS

0 5 10 MILES

P E N N S Y L V A N I A

D E L A W A R E

Watershed Management Area

(WMA) boundary and number

(From N.J. Department of

Environmental Protection,

1:24,000 digital line graph

file, 2000)

Continuous-record station10-19 years of record

Continuous-record 

station-greater than or

equal to 20 years of record

Partial-record station

Station identification

number

WMA 14

01412500

EXPLANATION

114 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Figure 2-18.  Location of streamflow-gaging stations in Watershed Management Area 18 (Lower Delaware) in New Jersey and

in Pennsylvania.

Pennsauken

Cr

Cooper

River

Big Timber

Cr

Mantua

Cr

Raccoon

Cr

Oldmans

Cr

Delaware

River

WMA 20

WMA 19

WMA 14

WMA 15

WMA 17

01467329

01476600

01477110

01477510

01474500

01477120 01475000

01467150

01467081

01477130

01477118

01477100

01476640

01475020

01474970

01474950

01467350

01467330

01467317

01467315

01467312

01467305 01467180

01467160

01467140

01467130

01467080

01467070

01467057

NEW YORK

PENNSYLVANIA DELAWARE

41°

40°

39°

75° 74°

ATLANTIC OCEAN

0 10 20 MILES

0 10 20 KILOMETERS

WMA 

18

Lower Delaware

Watershed Management Area 18

Base from U.S. Geological Survey

digital line graph files, 1:24,000

75°15’ 75°

39°

45’

40°

0 5 10 KILOMETERS

0 5 10 MILES

PENNSYLVANIA

Watershed Management Area

(WMA) boundary and number

(From N.J. Department of

Environmental Protection,

1:24,000 digital line graph

file, 2000)

Continuous-record stationgreater than or equal to 20

years of record

Partial-record station

Station identification number

WMA

01476600

EXPLANATION

Appendix 2 115
Figure 2-19.  Location of streamflow-gaging stations in Watershed Management Area 19 (Rancocas) in New Jersey.

116 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003

Ra ncocas

Cr

North Br

South Br

McDonalds Br

Delaware

River

WMA 11

WMA 20

WMA 13

WMA 14

WMA 15

WMA 18

WMA 13

WMA 10

01466900

01467005

01467019

01467021

01467000

01466500

01466000

01465850

01467020

01467010

01465965 01465900

01465898

01465884

01465880

01465865

01465847

0146700260

NEW YORK

PENNSYLVANIA DELAWARE

41°

40°

39°

75° 74°

ATLANTIC OCEAN

0 10 20 MILES

0 10 20 KILOMETERS

WMA

19

Rancocas Watershed

Management Area 19

Base from U.S. Geological Survey

digital line graph files, 1:24,000

74°45' 74°30'

39°

45'

40°

40°

15'

0 5 10 MILES

0 5 10 KILOMETERS

PENNSYLVANIA

Watershed Management Area

(WMA) boundary and number

(From N.J. Department of

Environmental Protection,

1:24,000 digital line graph

file, 2000)

Continuous-record station10-19 years of record

Continuous-record stationgreater than or equal to 20

years of record

Partial-record station

Station identification number

WMA 11

01466000

EXPLANATION

75°
Crosswicks Cr

Doc tors C reek

Assiscunk

Cr

Delaware

River

WMA 11

WMA 10

WMA 13

WMA 19

WMA 18

WMA 14

01464525

01464504

01464500

01464590

01464580

01464540

01464530

01464515

01464480

01464460

01464380

01464300

NEW YORK

PENNSYLVANIA DELAWARE

41°

40°

39°

75° 74°

ATLANTIC OCEAN

0 10 20 MILES

0 10 20 KILOMETERS

WMA 

20

Assiscunk, Crosswicks, and Doctors

Watershed Management Area 20

Base from U.S. Geological Survey

digital line graph files, 1:24,000

74°45’ 74°30’

40°

40°

15’

0 5 10 MILES

0 5 10 KILOMETERS

PENNSYLVANIA

WMA 10

01464500

EXPLANATION

Watershed Management Area

(WMA) boundary and number

(From N.J. Department of

Environmental Protection,

1:24,000 digital line graph

file, 2000)

Continuous-record stationgreater than or equal to 20

years of record

Partial-record station

Station identification number

Figure 2-20.  Location of streamflow-gaging stations in Watershed Management Area 20 (Assiscunk, Crosswicks, and

Doctors) in New Jersey.

Appendix 2 117

Appendix 3
Table 3-1.  Results of trend tests on annual n-day low flow at 138 streamflow-gaging stations in New Jersey, New York, and Pennsylvania.—Continued

[Bold blue indicates a significant upward trend and bold red indicates a significant downward trend; USGS, U.S. Geological Survey]

USGS 

station 

number

Station name

Period of record 1-day low flow 7-day low flow 30-day low flow

Begin End Kendal Tau

p-value Kendal Tau

p-value Kendal Tau

p-value

01368000 Wallkill River near Unionville, N.Y. 1937/10/1 1981/9/30 0.031 0.777 0.007 0.958 0.052 0.63001369000 Pochuck Creek near Pine Island, N.Y. 1937/10/1 1978/9/30 .093 .410 .109 .333 .101 .37101376280 Sparkill Creek at Sparkill, N.Y. 1959/10/1 1980/9/30 -.133 .848 -.067 1.000 -.333 .45201376800 Hackensack River at West Nyack, N.Y. 1959/10/1 2001/9/30 .123 .267 .123 .268 .036 .75301377000 Hackensack River at Rivervale, N.J. 1956/10/1 2001/9/30 .132 .209 .104 .327 .044 .67801377000 Hackensack River at Rivervale, N.J. 1941/10/1 1956/9/30 -.275 .188 -.297 .155 -.231 .27401377500 Pascack Brook at Westwood, N.J. 1934/10/1 2001/9/30 .210 .013 .269 .001 .325 .00001378500 Hackensack River at New Milford, N.J. 1921/10/1 2001/9/30 .131 .033 .135 .042 .120 .10601379000 Passaic River near Millington, N.J. 1903/10/1 2001/9/30 .034 .654 .025 .744 .041 .58801379000 Passaic River near Millington, N.J. 1903/10/1 1979/9/30 -.168 .060 -.194 .030 -.127 .15801379000 Passaic River near Millington, N.J. 1979/10/1 2001/9/30 -.105 .524 -.123 .450 -.105 .52501379500 Passaic River near Chatham, N.J. 1903/10/1 2001/9/30 .463 .000 .423 .000 .330 .00001379700 Rockaway River at Berkshire Valley, N.J. 1984/10/1 1996/9/30 -.378 .152 -.422 .107 -.333 .21001379773 Green Pond Brook at Picatinny Arsenal, N.J. 1982/10/1 2000/9/30 -.346 .057 -.382 .036 -.382 .03601379780 Green Pd Bk Bl Picatinny Lk at Picatinny Arsenal, N.J. 1984/10/1 2001/9/30 .025 .928 -.150 .444 -.300 .11501379790 Green Pond Brook at Wharton, N.J. 1982/10/1 2001/9/30 -.405 .021 -.399 .023 -.359 .04101380000 Beaver Bk at outlet of Splitrock Res, N.J. 1925/10/1 1989/9/30 .366 .004 .406 .001 .370 .00401380500 Rockaway River above Reservoir at Boonton, N.J. 1937/10/1 2001/9/30 -.026 .767 -.025 .780 .013 .88701381000 Rockaway River below Reservoir at Boonton, N.J. 1925/10/1 2001/9/30 .437 .000 .451 .000 .310 .00001381500 Whippany River at Morristown, N.J. 1921/10/1 2001/9/30 .350 .000 .329 .000 .284 .00001381900 Passaic River at Pine Brook, N.J. 1979/10/1 2001/9/30 .090 .586 .119 .468 .029 .88001382500 Pequannock R at Macopin Intake Dam, N.J. 1922/10/1 1961/9/30 .053 .101 .053 .101 .081 .26501382500 Pequannock R at Macopin Intake Dam, N.J. 1961/10/1 2001/9/30 .387 .001 .328 .005 .289 .01501383500 Wanaque River at Awosting, N.J. 1918/10/1 2001/9/30 -.107 .158 -.053 .486 -.012 .87401384000 Wanaque River at Monks, N.J. 1934/10/1 1985/9/30 -.285 .004 -.233 .017 -.216 .02801384500 Ringwood Creek near Wanaque, N.J. 1934/10/1 2001/9/30 -.042 .648 -.041 .658 -.043 .63901385000 Cupsaw Brook near Wanaque, N.J. 1934/10/1 1958/9/30 -.545 .000 -.589 .000 -.415 .00601386000 West Brook near Wanaque, N.J. 1934/10/1 1978/9/30 .012 .916 -.060 .579 -.028 .80201386500 Blue Mine Brook near Wanaque, N.J. 1934/10/1 1958/9/30 -.352 .005 -.340 .014 -.316 .036

120 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Table 3-1.  Results of trend tests on annual n-day low flow at 138 streamflow-gaging stations in New Jersey, New York, and Pennsylvania.—Continued

[Bold blue indicates a significant upward trend and bold red indicates a significant downward trend; USGS, U.S. Geological Survey]

USGS 

station 

number

Station name

Period of record 1-day low flow 7-day low flow 30-day low flow

Begin End Kendal Tau p-value Kendal Tau p-value Kendal Tau p-value

01387000 Wanaque R at Wanaque, N.J. 1911/10/1 1928/9/30 -0.022 1.000 0.244 0.371 0.156 0.59201387000 Wanaque R at Wanaque, N.J. 1928/10/1 2001/9/30 .056 .486 .070 .383 .073 .36801387400 Ramapo River at Ramapo, N.Y. 1978/10/1 2001/9/30 .132 .433 .116 .495 .095 .58101387420 Ramapo River at Suffern, N.Y. 1978/10/1 2001/9/30 -.053 .769 -.089 .603 -.011 .97401387450 Mahwah River near Suffern, N.Y. 1958/10/1 1995/9/30 -.079 .504 -.078 .513 -.016 .90201387500 Ramapo River near Mahwah, N.J. 1903/10/1 2001/9/30 -.073 .336 -.141 .064 -.104 .17401388000 Ramapo River at Pompton Lakes, N.J. 1921/10/1 2001/9/30 .142 .065 -.064 .409 -.065 .40001388500 Pompton River at Pompton Plains, N.J. 1903/10/1 2001/9/30 -.167 .061 -.176 .047 -.151 .08901389500 Passaic River at Little Falls, N.J. 1896/10/1 1927/9/30 -.148 .268 -.522 .000 -.369 .00501389500 Passaic River at Little Falls, N.J. 1927/10/1 2001/9/30 .166 .039 .094 .243 .066 .41001390500 Saddle River at Ridgewood, N.J. 1954/10/1 2001/9/30 -.215 .046 -.233 .030 -.175 .10401391000 Hohokus Brook at Ho- Ho-kus, N.J. 1954/10/1 1996/9/30 .611 .000 .632 .000 .537 .00001391500 Saddle River at Lodi, N.J. 1923/10/1 1966/9/30 .166 .123 .121 .264 .041 .71301391500 Saddle River at Lodi, N.J. 1965/10/1 2001/9/30 -.003 .989 .000 1.000 -.035 .77601391500 Saddle River at Lodi, N.J. 1923/10/1 2001/9/30 .156 .045 .139 .074 .129 .09701392000 Weasel Bk at Clifton, N.J. 1936/10/1 1950/9/30 -.051 .846 .090 .714 .000 1.00001392000 Weasel Bk at Clifton, N.J. 1951/10/1 1962/9/30 .489 .059 .467 .074 .511 .04901392210 Third River at Passaic, N.J. 1976/10/1 1997/9/30 .070 .699 -.006 1.000 -.099 .57601392500 Second River at Belleville, N.J. 1936/10/1 1964/9/30 -.009 .965 -.006 .982 .077 .59701393450 Elizabeth River at Ursino Lake at Elizabeth, N.J. 1951/10/1 2001/9/30 .054 .587 -.304 .002 -.270 .00601394000 WB Rahway River at Millburn, N.J. 1940/10/1 1950/9/30 -.139 .670 -.278 .348 -.333 .25101394500 Rahway River near Springfield, N.J. 1938/10/1 2001/9/30 .371 .000 .399 .000 .361 .00001395000 Rahway River at Rahway, N.J. 1921/10/1 2001/9/30 -.277 .000 -.204 .008 -.025 .75101396000 Robinsons Branch at Rahway, N.J. 1939/10/1 1999/9/30 .143 .116 .165 .073 .356 .00001396500 South Branch Raritan River near High Bridge, N.J. 1918/10/1 2001/9/30 .098 .194 .021 .782 .025 .74001396580 Spruce Run at Glen Gardner, N.J. 1977/10/1 2001/9/30 -.088 .623 -.076 .674 -.146 .40101396660 Mulhockaway Creek at Van Syckel, N.J. 1976/10/1 2001/9/30 -.016 .937 -.075 .635 -.130 .39801396800 Spruce Run at Clinton, N.J. 1963/10/1 2001/9/30 .032 .794 -.090 .440 -.087 .45601397000 South Branch Raritan River at Stanton, N.J. 1903/10/1 1963/9/30 .014 .899 -.095 .363 -.105 .314

Appendix 3 121
Table 3-1.  Results of trend tests on annual n-day low flow at 138 streamflow-gaging stations in New Jersey, New York, and Pennsylvania.—Continued

[Bold blue indicates a significant upward trend and bold red indicates a significant downward trend; USGS, U.S. Geological Survey]

USGS 

station 

number

Station name

Period of record 1-day low flow 7-day low flow 30-day low flow

Begin End Kendal Tau

p-value Kendal Tau

p-value Kendal Tau

p-value

01397000 SB Raritan River at Stanton, N.J. 1963/10/1 2001/9/30 0.107 0.359 0.012 0.927 0.026 0.83401397500 Walnut Brook near Flemington, N.J. 1935/10/1 1961/9/30 -.110 .407 -.037 .812 -.050 .74301398000 Neshanic River at Reaville, N.J. 1930/10/1 2001/9/30 -.063 .444 -.076 .356 .043 .59801398045 Back Brook Tributary near Ringoes, N.J. 1976/10/1 1988/9/30 -.222 .410 -.067 .855 -.067 .85801398107 Holland Brook at Readington, N.J. 1977/10/1 1996/9/30 .000 1.000 .051 .805 .074 .71101398500 NB Raritan River near Far Hills, N.J. 1921/10/1 2001/9/30 -.038 .628 -.052 .507 -.028 .72001399190 Lamington (Black) River at Succasunna, N.J. 1976/10/1 1987/9/30 .000 1.000 -.067 .858 .156 .59201399200 Lamington (Black) R near Ironia, N.J. 1940/10/1 1987/9/30 -.182 .482 -.127 .640 -.018 1.00001399500 Lamington (Black) River near Pottersville, N.J. 1921/10/1 2001/9/30 -.011 .892 -.038 .620 -.018 .82201399510 Upper Cold Brook near Pottersville, N.J. 1972/10/1 1997/9/30 .308 .042 .245 .107 .162 .29101399525 Axle Brook near Pottersville, N.J. 1977/10/1 1989/9/30 .200 .454 .222 .414 .133 .65301399670 SB Rockaway Creek at Whitehouse Station, N.J. 1976/10/1 2001/9/30 -.301 .041 -.351 .017 -.239 .10701400000 North Branch Raritan River near Raritan, N.J. 1923/10/1 2001/9/30 .182 .019 .104 .181 .139 .07301400300 Peters Brook near Raritan, N.J. 1977/10/1 1996/9/30 .132 .482 .147 .434 .000 1.00001400350 Macs Brook at Somerville, N.J. 1981/10/1 1996/9/30 .372 .084 .346 .112 .385 .07701400500 Raritan River at Manville, N.J. 1903/10/1 1963/9/30 -.195 .064 -.218 .038 -.152 .14801400500 Raritan River at Manville, N.J. 1963/10/1 2001/9/30 .312 .007 .257 .026 .189 .10201400730 Millstone River at Plainsboro, N.J. 1963/10/1 1990/9/30 .000 1.000 .061 .837 .182 .45101401000 Stony Brook at Princeton, N.J. 1953/10/1 2001/9/30 .262 .010 .256 .011 .191 .05901401650 Pike Run at Belle Mead, N.J. 1979/10/1 2001/9/30 -.232 .156 -.232 .161 -.189 .25601402000 Millstone River at Blackwells Mills, N.J. 1921/10/1 2001/9/30 .065 .402 -.014 .862 -.018 .81901402600 Royce Brook Tributary near Belle Mead, N.J. 1966/10/1 1996/9/30 .340 .015 .534 .000 .375 .01301403060 Raritan River below Calco Dam at Bound Brook, N.J. 1902/10/1 1963/9/30 -.506 .001 -.542 .000 -.478 .00201403060 Raritan River below Calco Dam at Bound Brook, N.J. 1963/10/1 2001/9/30 .119 .307 .048 .685 .039 .74401403150 West Branch Middle Brook near Martinsville, N.J. 1978/10/1 2001/9/30 .238 .135 .238 .139 .229 .15601403400 Green Brook at Seeley Mills, N.J. 1978/10/1 2001/9/30 .033 .856 .043 .809 .010 .97601403500 Green Brook at Plainfield, N.J. 1938/10/1 1985/9/30 .059 .570 .055 .604 .162 .12001403535 East Branch Stony Brook at Best Lake at Watchung, N.J. 1979/10/1 2001/9/30 .018 .944 -.064 .726 -.170 .32701403540 Stony Brook at Watchung, N.J. 1974/10/1 2001/9/30 .049 .741 .052 .724 -.058 .692

122 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Table 3-1.  Results of trend tests on annual n-day low flow at 138 streamflow-gaging stations in New Jersey, New York, and Pennsylvania.—Continued

[Bold blue indicates a significant upward trend and bold red indicates a significant downward trend; USGS, U.S. Geological Survey]

USGS 

station 

number

Station name

Period of record 1-day low flow 7-day low flow 30-day low flow

Begin End Kendal Tau p-value Kendal Tau p-value Kendal Tau p-value

01405000 Lawrence Brook at Farrington Dam, N.J. 1926/10/1 1990/9/30 0.177 0.041 0.111 0.206 0.039 0.66201405030 Lawrence Brook at Westons Mills, N.J. 1988/10/1 2001/9/30 -.222 .414 .156 .592 -.200 .47401405300 Matchaponix Brook at Spotswood, N.J. 1956/10/1 1967/9/30 -.222 .419 -.200 .474 -.200 .47401405400 Manalapan Brook at Spotswood, N.J. 1956/10/1 2001/9/30 .104 .326 -.025 .816 -.023 .83201405500 South River at Old Bridge, N.J. 1938/10/1 1989/9/30 .066 .510 .063 .534 .115 .25201407000 Matawan Creek at Matawan, N.J. 1931/10/1 1955/9/30 -.105 .317 -.095 .580 .137 .41701407500 Swimming River near Red Bank, N.J. 1921/10/1 2001/9/30 -.489 .000 -.552 .000 -.513 .00001407705 Shark River near Neptune City, N.J. 1966/10/1 2001/9/30 -.194 .109 -.159 .192 -.066 .59401407760 Jumping Brook near Neptune City, N.J. 1966/10/1 2001/9/30 -.137 .259 -.169 .163 .020 .88201408000 Manasquan River at Squankum, N.J. 1931/10/1 2001/9/30 .044 .597 .052 .527 .112 .17601408029 Manasquan River near Allenwood, N.J. 1989/10/1 2001/9/30 -.311 .204 -.511 .047 -.511 .04901408120 North Branch Metedeconk River near Lakewood, N.J. 1972/10/1 2001/9/30 -.246 .068 -.243 .072 -.116 .39601408500 Toms River near Toms River, N.J. 1928/10/1 1966/9/30 -.005 .979 .000 1.000 .054 .64701408500 Toms River near Toms River, N.J. 1966/10/1 2001/9/30 -.198 .103 -.191 .116 -.189 .12001409000 Cedar Creek at Lanoka Harbor, N.J. 1931/10/1 1971/9/30 -.393 .006 -.260 .072 -.273 .05901409095 Oyster Creek near Brookville, N.J. 1964/10/1 1985/9/30 -.111 .541 -.111 .544 -.118 .51901409280 Westecunk Creek at Stafford Forge, N.J. 1973/10/1 1988/9/30 -.363 .079 -.121 .584 -.143 .51101409400 Mullica River near Batsto, N.J. 1956/10/1 2001/9/30 -.085 .426 -.111 .300 -.092 .39101409500 Batsto River at Batsto, N.J. 1927/10/1 2001/9/30 -.005 .950 -.131 .103 -.146 .07101409810 West Branch Wading River near Jenkins, N.J. 1974/10/1 1997/9/30 -.086 .607 -.119 .468 -.014 .95201410000 Oswego River at Harrisville, N.J. 1930/10/1 2001/9/30 .031 .711 -.057 .490 -.056 .49401410150 East Branch Bass River near New Gretna, N.J. 1977/10/1 2001/9/30 .316 .037 .209 .170 .241 .11301410500 Absecon Creek at Absecon, N.J. 1945/10/1 1985/9/30 .320 .005 .264 .022 .246 .03301411000 Great Egg Harbor River at Folsom, N.J. 1924/10/1 2001/9/30 .000 1.000 -.016 .844 .008 .92001411300 Tuckahoe River at Head of River, N.J. 1969/10/1 2001/9/30 .054 .682 .047 .721 .019 .89201411456 Little Ease Run near Clayton, N.J. 1987/10/1 2001/9/30 -.269 .219 -.231 .300 -.308 .16101411500 Maurice River at Norma, N.J. 1932/10/1 2001/9/30 .011 .899 -.058 .491 -.078 .35201412000 Menantico Creek near Millville, N.J. 1930/10/1 1985/9/30 .305 .016 -.026 .852 -.166 .19601412500 WB Cohansey River at Seeley, N.J. 1950/10/1 1967/9/30 -.352 .074 -.295 .138 -.352 .075

Appendix 3 123
Table 3-1.  Results of trend tests on annual n-day low flow at 138 streamflow-gaging stations in New Jersey, New York, and Pennsylvania.—Continued

[Bold blue indicates a significant upward trend and bold red indicates a significant downward trend; USGS, U.S. Geological Survey]

USGS 

station 

number

Station name

Period of record 1-day low flow 7-day low flow 30-day low flow

Begin End Kendal Tau

p-value Kendal Tau

p-value Kendal Tau

p-value

01412500 WB Cohansey River at Seeley, N.J. 1950/10/1 1967/9/30 -0.352 0.074 -0.295 0.138 -0.352 0.07501412800 Cohansey River at Seeley, N.J. 1977/10/1 1988/9/30 -.556 .029 -.556 .032 -.467 .07401434000 Delaware River at Port Jervis, N.Y. 1904/10/1 1954/9/30 .077 .443 .277 .005 .230 .02001434000 Delaware River at Port Jervis, N.Y. 1954/10/1 2001/9/30 .221 .031 .228 .026 .186 .07101437500 Neversink River at Godeffroy, N.Y. 1937/10/1 1954/9/30 .083 .685 -.050 .822 -.050 .82201437500 Neversink River at Godeffroy, N.Y. 1954/10/1 2001/9/30 .146 .155 .080 .438 .014 .89501438500 Delaware River at Montague, N.J. 1939/10/1 1954/9/30 -.011 1.000 -.143 .511 -.099 .66101438500 Delaware River at Montague, N.J. 1954/10/1 2001/9/30 .168 .101 .190 .063 .164 .11001440000 Flat Brook near Flat Brookville, N.J. 1923/10/1 2001/9/30 -.064 .415 -.086 .271 -.050 .52601440200 Delaware River near Delaware Water Gap, Pa. 1963/10/1 1996/9/30 -.124 .344 -.163 .212 -.200 .12501443500 Paulins Kill at Blair Stown, N.J. 1921/10/1 2001/9/30 .085 .273 .012 .878 .039 .62201443900 Yards Creek near Blairstown, N.J. 1966/10/1 2001/9/30 .506 .000 .554 .000 .458 .00001445000 Pequest River at Huntsville, N.J. 1939/10/1 1962/9/30 .035 .843 .013 .955 -.048 .77801445500 Pequest River at Pequest, N.J. 1921/10/1 2001/9/30 .078 .313 .036 .638 .063 .41601446000 Beaver Brook near Belvidere, N.J. 1922/10/1 1961/9/30 .011 .930 -.016 .900 -.024 .84101446500 Delaware River at Belvidere, N.J. 1922/10/1 1954/9/30 -.090 .486 .019 .892 -.011 .94601446500 Delaware River at Belvidere, N.J. 1954/10/1 2001/9/30 .118 .252 .091 .379 .127 .21801453000 Lehigh River at Bethlehem, Pa. 1902/10/1 1990/9/30 .222 .003 .210 .006 .212 .00501455200 Pohatcong Creek at New Village, N.J. 1959/10/1 1969/9/30 -.528 .059 -.333 .251 -.278 .34801455500 Musconetcong R at out of Lake Hopatcong, N.J. 1927/10/1 1976/9/30 -.461 .000 -.359 .000 -.268 .00901456000 Musconetcong R near Hackettstown, N.J. 1921/10/1 1974/9/30 .012 .909 -.045 .643 -.096 .32201457000 Musconetcong River near Bloomsbury, N.J. 1903/10/1 2001/9/30 .144 .055 .061 .416 .065 .38901457500 Delaware R at Riegelsville, N.J. 1905/10/1 1954/9/30 .321 .002 .353 .000 .288 .00401457500 Delaware R at Riegelsville, N.J. 1954/10/1 1971/9/30 .208 .278 .233 .224 .200 .30001460440 Delaware and Raritan Canal at Port Mercer, N.J. 1989/10/1 2001/9/30 -.800 .086 .022 1.000 .422 .10701460500 Delaware and Raritan Canal at Kingston, N.J. 1946/10/1 1992/9/30 .080 .445 .128 .224 .197 .06101463500 Delaware River at Trenton, N.J. 1912/10/1 1954/9/30 .139 .204 .185 .090 .120 .27601463500 Delaware River at Trenton, N.J. 1954/10/1 2001/9/30 .128 .215 .071 .495 .074 .47201464000 Assunpink Creek at Trenton, N.J. 1923/10/1 1954/9/30 .377 .004 .108 .412 .041 .762

124 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Table 3-1.  Results of trend tests on annual n-day low flow at 138 streamflow-gaging stations in New Jersey, New York, and Pennsylvania.—Continued

[Bold blue indicates a significant upward trend and bold red indicates a significant downward trend; USGS, U.S. Geological Survey]

USGS 

station 

number

Station name

Period of record 1-day low flow 7-day low flow 30-day low flow

Begin End Kendal Tau p-value Kendal Tau p-value Kendal Tau p-value

01464000 Assunpink Creek at Trenton, N.J. 1954/10/1 2001/9/30 0.137 0.181 0.101 0.325 0.113 0.27201464500 Crosswicks Creek at Extonville, N.J. 1939/10/1 2001/9/30 -.047 .605 -.090 .321 -.028 .75801465850 SB Rancocas C at Vincentown, N.J. 1960/10/1 2001/9/30 .132 .546 .077 .742 .099 .66101466000 MB Mt Misery Bk in Lebanon State Forest, N.J. 1952/10/1 1977/9/30 .061 .805 .197 .387 .227 .33601466500 McDonalds Branch in Lebanon State Forest, N.J. 1953/10/1 2001/9/30 -.260 .010 -.274 .007 -.246 .01501467000 North Branch Rancocas Creek at Pemberton, N.J. 1921/10/1 2001/9/30 .137 .074 .046 .553 .001 .99001467081 South Branch Pennsauken Creek at Cherry Hill, N.J. 1967/10/1 2001/9/30 -.217 .089 -.204 .110 -.067 .61001467150 Cooper River at Haddonfield, N.J. 1963/10/1 1987/9/30 .593 .000 .542 .000 .383 .01101467150 Cooper River at Haddonfield, N.J. 1987/10/1 2001/9/30 -.269 .222 -.256 .246 -.282 .20001474500 Schuylkill River at Philadelphia, Pa. 1931/10/1 1991/9/30 .287 .001 .236 .009 .228 .01201475000 Mantua Creek at Pitman, N.J. 1939/10/1 1977/9/30 -.155 .195 -.153 .201 -.138 .25001477120 Raccoon Creek near Swedesboro, N.J. 1965/10/1 2001/9/30 .020 .875 .039 .755 .032 .79801482500 Salem River at Woodstown, N.J. 1939/10/1 1990/9/30 .064 .556 .074 .495 .043 .69601483000 Alloway Creek at Alloway, N.J. 1952/10/1 1973/9/30 -.070 .683 -.099 .574 -.135 .441

Appendix 3 125
Table 3-2.  Results of trend tests on annual n-day high flow at 138 streamflow-gaging stations in New Jersey, New York, and Pennsylvania.—Continued

[Bold blue indicates a significant upward trend and bold red indicates a significant downward trend; USGS, U.S. Geological Survey]

USGS 

station 

number

Station name

Period of record 1-day high flow 7-day high flow 30-day high flow

Begin End Kendal Tau

p-value Kendal Tau

p-value Kendal Tau

p-value

01368000 Wallkill River near Unionville, N.Y. 1937/10/1 1981/9/30 -0.025 0.816 0.037 0.731 0.112 0.28801369000 Pochuck Creek near Pine Island, N.Y. 1937/10/1 1978/9/30 .105 .345 .082 .463 .115 .30001376280 Sparkill Creek at Sparkill, N.Y. 1959/10/1 1980/9/30 .071 .902 .071 .902 .000 1.00001376800 Hackensack River at West Nyack, N.Y. 1959/10/1 2001/9/30 .039 .728 -.017 .884 -.102 .35101377000 Hackensack River at Rivervale, N.J. 1941/10/1 1956/9/30 .200 .322 .238 .235 .162 .42801377000 Hackensack River at Rivervale, N.J. 1956/10/1 2001/9/30 .203 .050 .061 .564 -.034 .74701377500 Pascack Brook at Westwood, N.J. 1934/10/1 2001/9/30 -.004 .970 -.054 .520 -.070 .40801378500 Hackensack River at New Milford, N.J. 1921/10/1 2001/9/30 .086 .260 -.074 .331 -.222 .00401379000 Passaic River near Millington, N.J. 1903/10/1 2001/9/30 .152 .044 .152 .045 .027 .72901379000 Passaic River near Millington, N.J. 1903/10/1 1979/9/30 .199 .026 .199 .026 .124 .16501379000 Passaic River near Millington, N.J. 1979/10/1 2001/9/30 -.061 .714 .039 .822 -.152 .33801379500 Passaic River near Chatham, N.J. 1903/10/1 2001/9/30 -.038 .641 -.015 .853 -.045 .58301379700 Rockaway River at Berkshire Valley, N.J. 1984/10/1 1996/9/30 -.289 .283 -.067 .858 .022 1.00001379773 Green Pond Brook at Picatinny Arsenal, N.J. 1982/10/1 2000/9/30 .000 1.000 .020 .940 -.072 .70501379780 Green Pd Bk Bl Picatinny Lk at Picatinny Arsenal, N.J. 1984/10/1 2001/9/30 .096 .621 .051 .805 .140 .45801379790 Green Pond Brook at Wharton, N.J. 1982/10/1 2001/9/30 -.064 .726 -.070 .700 -.064 .72601380000 Beaver Bk at outlet of Splitrock Res, N.J. 1925/10/1 1989/9/30 .201 .104 .117 .344 .066 .59801380500 Rockaway River above Reservoir at Boonton, N.J. 1937/10/1 2001/9/30 .202 .018 .143 .096 .100 .24401381000 Rockaway River below Reservoir at Boonton, N.J. 1925/10/1 2001/9/30 .340 .000 .283 .000 .199 .01101381500 Whippany River at Morristown, N.J. 1921/10/1 2001/9/30 .232 .002 .188 .014 .169 .02701381900 Passaic River at Pine Brook, N.J. 1979/10/1 2001/9/30 -.013 .955 -.017 .933 -.065 .69301382500 Pequannock R at Macopin Intake Dam, N.J. 1922/10/1 1961/9/30 .173 .124 .177 .116 .128 .25501382500 Pequannock R at Macopin Intake Dam, N.J. 1961/10/1 2001/9/30 .206 .075 .201 .082 .243 .03501383500 Wanaque River at Awosting, N.J. 1918/10/1 2001/9/30 .258 .001 .228 .002 .111 .14101384000 Wanaque River at Monks, N.J. 1934/10/1 1985/9/30 .131 .183 .203 .038 .153 .12001384500 Ringwood Creek near Wanaque, N.J. 1934/10/1 2001/9/30 -.009 .924 .093 .296 .085 .33901385000 Cupsaw Bk near Wanaque, N.J. 1934/10/1 1958/9/30 .167 .264 .239 .107 .130 .38501386000 West Brook near Wanaque, N.J. 1934/10/1 1978/9/30 -.039 .716 .104 .327 .125 .23701386500 Blue Mine Brook near Wanaque, N.J. 1934/10/1 1958/9/30 .091 .551 .304 .040 .210 .157

126 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Table 3-2.  Results of trend tests on annual n-day high flow at 138 streamflow-gaging stations in New Jersey, New York, and Pennsylvania.—Continued

[Bold blue indicates a significant upward trend and bold red indicates a significant downward trend; USGS, U.S. Geological Survey]

USGS 

station 

number

Station name

Period of record 1-day high flow 7-day high flow 30-day high flow

Begin End Kendal Tau p-value Kendal Tau p-value Kendal Tau p-value

01387000 Wanaque R at Wanaque, N.J. 1911/10/1 1928/9/30 0.055 0.876 -0.127 0.640 -0.418 0.08701387000 Wanaque R at Wanaque, N.J. 1928/10/1 2001/9/30 .043 .590 .065 .415 -.018 .82301387400 Ramapo River at Ramapo, N.Y. 1978/10/1 2001/9/30 -.138 .398 .095 .566 -.152 .34901387420 Ramapo River at Suffern, N.Y. 1978/10/1 2001/9/30 -.157 .334 -.095 .566 -.133 .41501387450 Mahwah River near Suffern, N.Y. 1958/10/1 1995/9/30 .168 .147 .096 .410 .059 .61901387500 Ramapo River near Mahwah, N.J. 1903/10/1 2001/9/30 .129 .087 .124 .100 .080 .29001388000 Ramapo River at Pompton Lakes, N.J. 1921/10/1 2001/9/30 .054 .477 .081 .288 .041 .59201388500 Pompton River at Pompton Plains, N.J. 1903/10/1 2001/9/30 .124 .155 .126 .150 .097 .26901389500 Passaic River at Little Falls, N.J. 1896/10/1 1927/9/30 -.294 .023 -.264 .042 -.315 .01501389500 Passaic River at Little Falls, N.J. 1927/10/1 2001/9/30 .085 .285 .090 .259 .024 .76501390500 Saddle R at Ridgewood, N.J. 1954/10/1 2001/9/30 -.069 .517 -.064 .544 -.070 .51101391000 Hohokus Brook at Ho-ho-kus, N.J. 1954/10/1 1996/9/30 -.031 .792 .063 .589 .105 .35901391500 Saddle River at Lodi, N.J. 1923/10/1 1965/9/30 .174 .102 .058 .594 .017 .88401391500 Saddle River at Lodi, N.J. 1965/10/1 2001/9/30 -.241 .040 -.184 .117 -.111 .34701392000 Weasel Bk at Clifton, N.J. 1936/10/1 1950/9/30 -.244 .271 -.103 .669 -.051 .85501392000 Weasel Bk at Clifton, N.J. 1951/10/1 1962/9/30 -.091 .755 -.091 .755 -.091 .75501392210 Third River at Passaic, N.J. 1976/10/1 1997/9/30 -.168 .315 -.295 .074 -.232 .16301392500 Second River at Belleville, N.J. 1936/10/1 1964/9/30 .060 .677 -.117 .404 -.134 .33801393450 Elizabeth R at Ursino Lake at Elizabeth, N.J. 1921/10/1 1951/9/30 .101 .443 -.021 .887 -.053 .69501393450 Elizabeth R at Ursino Lake at Elizabeth, N.J. 1951/10/1 2001/9/30 -.148 .132 -.106 .281 -.096 .33201394000 WB Rahway River at Millburn, N.J. 1940/10/1 1950/9/30 -.156 .592 -.111 .721 -.111 .72101394500 Rahway R near Springfield, N.J. 1938/10/1 2001/9/30 .182 .036 .163 .060 .156 .07201395000 Rahway River at Rahway, N.J. 1921/10/1 2001/9/30 .240 .002 .192 .012 .114 .13601396000 Robinsons Branch at Rahway, N.J. 1939/10/1 1999/9/30 .079 .390 .046 .620 .041 .65501396500 South Branch Raritan River near High Bridge, N.J. 1918/10/1 2001/9/30 .154 .039 .122 .104 .089 .23301396580 Spruce Run at Glen Gardner, N.J. 1977/10/1 2001/9/30 .006 1.000 -.170 .327 -.170 .32701396660 Mulhockaway Creek at Van Syckel, N.J. 1976/10/1 2001/9/30 -.043 .785 -.018 .921 -.138 .35901396800 Spruce Run at Clinton, N.J. 1963/10/1 2001/9/30 -.078 .497 -.030 .801 .084 .46601397000 SB Raritan River at Stanton, N.J. 1903/10/1 1963/9/30 -.019 .862 .019 .854 .003 .985

Appendix 3 127
Table 3-2.  Results of trend tests on annual n-day high flow at 138 streamflow-gaging stations in New Jersey, New York, and Pennsylvania.—Continued

[Bold blue indicates a significant upward trend and bold red indicates a significant downward trend; USGS, U.S. Geological Survey]

USGS 

station 

number

Station name

Period of record 1-day high flow 7-day high flow 30-day high flow

Begin End Kendal Tau

p-value Kendal Tau

p-value Kendal Tau

p-value

01397000 SB Raritan River at Stanton, N.J. 1963/10/1 2001/9/30 -0.017 0.890 0.061 0.597 0.118 0.30301397500 Walnut Brook near Flemington, N.J. 1935/10/1 1961/9/30 -.127 .387 -.013 .944 -.007 .98101398000 Neshanic River at Reaville, N.J. 1930/10/1 2001/9/30 .159 .050 .185 .023 .118 .14601398045 Back Brook Tributary near Ringoes, N.J. 1976/10/1 1988/9/30 .055 .876 -.018 1.000 -.127 .64001398107 Holland Brook at Readington, N.J. 1977/10/1 1996/9/30 -.441 .015 -.294 .108 -.191 .30301398500 NB Raritan River near Far Hills, N.J. 1921/10/1 2001/9/30 .101 .193 .090 .246 .025 .74601399190 Lamington (Black) River at Succasunna, N.J. 1976/10/1 1987/9/30 .145 .582 .018 1.000 -.091 .75501399200 Lamington (Black) R near Ironia, N.J. 1940/10/1 1987/9/30 -.242 .304 -.091 .732 -.061 .83701399500 Lamington (Black) River near Pottersville, N.J. 1921/10/1 2001/9/30 .075 .327 .120 .116 .091 .23301399510 Upper Cold Brook near Pottersville, N.J. 1972/10/1 1997/9/30 -.033 .842 -.080 .602 -.051 .74701399525 Axle Brook near Pottersville, N.J. 1977/10/1 1989/9/30 .455 .062 -.491 .043 -.600 .01301399670 South Branch Rockaway Creek at Whitehouse Station, N.J. 1976/10/1 2001/9/30 -.225 .130 -.225 .130 -.167 .26401400000 North Branch Raritan River near Raritan, N.J. 1923/10/1 2001/9/30 .115 .139 .134 .083 .100 .19601400300 Peters Brook near Raritan, N.J. 1977/10/1 1996/9/30 -.213 .248 -.324 .077 -.368 .04401400350 Macs Brook at Somerville, N.J. 1981/10/1 1996/9/30 -.462 .032 -.436 .044 -.205 .36001400500 Raritan River at Manville, N.J. 1903/10/1 1963/9/30 -.142 .171 .002 .992 -.046 .66001400500 Raritan River at Manville, N.J. 1963/10/1 2001/9/30 -.166 .145 .010 .940 .055 .63301400730 Millstone River at Plainsboro, N.J. 1963/10/1 1990/9/30 .385 .077 .436 .044 .487 .02401401000 Stony Brook at Princeton, N.J. 1953/10/1 2001/9/30 .078 .439 .144 .152 .165 .10001401500 Millstone River near Kingston, N.J. 1933/10/1 1949/9/30 .000 1.000 .100 .620 -.017 .96401401650 Pike Run at Belle Mead, N.J. 1979/10/1 2001/9/30 .043 .809 .038 .833 .019 .92801402000 Millstone River at Blackwells Mills, N.J. 1921/10/1 2001/9/30 .178 .020 .138 .071 .090 .24001402600 Royce Brook Tributary near Belle Mead, N.J. 1966/10/1 1996/9/30 -.194 .205 -.174 .256 -.107 .49201403060 Raritan River below Calco Dam at Bound Brook, N.J. 1902/10/1 1963/9/30 -.188 .206 .022 .901 .022 .90101403060 Raritan River below Calco Dam at Bound Brook, N.J. 1963/10/1 2001/9/30 -.195 .087 -.070 .546 .007 .96001403150 West Branch Middle Brook near Martins Ville, N.J. 1978/10/1 2001/9/30 .104 .516 .048 .778 -.100 .53501403400 Green Brook at Seeley Mills, N.J. 1978/10/1 2001/9/30 -.108 .499 .004 1.000 -.022 .91001403500 Green Brook at Plainfield, N.J. 1938/10/1 1985/9/30 .310 .002 .282 .006 .214 .03701403535 EB Stony Brook at Best Lake at Watchung, N.J. 1979/10/1 2001/9/30 .163 .330 .179 .284 .095 .581

128 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Table 3-2.  Results of trend tests on annual n-day high flow at 138 streamflow-gaging stations in New Jersey, New York, and Pennsylvania.—Continued

[Bold blue indicates a significant upward trend and bold red indicates a significant downward trend; USGS, U.S. Geological Survey]

USGS 

station 

number

Station name

Period of record 1-day high flow 7-day high flow 30-day high flow

Begin End Kendal Tau p-value Kendal Tau p-value Kendal Tau p-value

01403540 Stony Brook at Watchung, N.J. 1974/10/1 2001/9/30 0.003 1.000 -0.068 0.632 -0.094 0.50501405000 Lawrence Brook at Farrington Dam, N.J. 1926/10/1 1990/9/30 .076 .388 .032 .720 -.036 .68401405030 Lawrence Bk at Westons Mills, N.J. 1988/10/1 2001/9/30 -.055 .876 .091 .755 -.018 1.00001405300 Matchaponix Brook at Spotswood, N.J. 1956/10/1 1967/9/30 -.244 .371 -.333 .210 -.511 .04901405400 Manalapan Brook at Spotswood, N.J. 1956/10/1 2001/9/30 .019 .863 -.055 .606 -.051 .63501405500 South River at Old Bridge, N.J. 1938/10/1 1989/9/30 .060 .546 .054 .587 .146 .14001407000 Matawan C at Matawan, N.J. 1931/10/1 1955/9/30 .195 .215 .030 .866 -.074 .65201407500 Swimming River near Red Bank, N.J. 1921/10/1 2001/9/30 .157 .041 .074 .339 -.027 .72801407705 Shark River near Neptune City, N.J. 1966/10/1 2001/9/30 .040 .744 .047 .701 .143 .23301407760 Jumping Brook near Neptune City, N.J. 1966/10/1 2001/9/30 .044 .723 -.018 .887 .029 .82001408000 Manasquan River at Squankum, N.J. 1931/10/1 2001/9/30 .084 .306 .042 .612 .053 .51601408029 Manasquan River near Allenwood, N.J. 1989/10/1 2001/9/30 -.127 .640 -.091 .755 -.055 .87601408120 North Branch Metedeconk River near Lakewood, N.J. 1972/10/1 2001/9/30 .054 .694 -.037 .793 -.064 .63901408500 Toms River near Toms River, N.J. 1928/10/1 1966/9/30 .165 .148 .115 .315 .058 .61501408500 Toms River near Toms River, N.J. 1966/10/1 2001/9/30 -.129 .280 -.190 .112 -.156 .19101409000 Cedar Creek at Lanoka Harbor, N.J. 1931/10/1 1971/9/30 -.020 .900 -.137 .327 -.100 .47801409095 Oyster Creek near Brookville, N.J. 1964/10/1 1985/9/30 .094 .600 .146 .401 .240 .16201409280 Westecunk Creek at Stafford Forge, N.J. 1973/10/1 1988/9/30 -.229 .254 -.162 .428 -.124 .55301409400 Mullica River near Batsto, N.J. 1956/10/1 2001/9/30 -.066 .537 -.053 .620 .008 .94401409500 Batsto River at Batsto, N.J. 1927/10/1 2001/9/30 .016 .849 -.005 .951 -.019 .81501409810 West Branch Wading River near Jenkins, N.J. 1974/10/1 1997/9/30 -.104 .516 -.056 .735 -.004 1.00001410000 Oswego River at Harrisville, N.J. 1930/10/1 2001/9/30 .080 .326 .087 .288 .033 .69101410150 East Branch Bass River near New Gretna, N.J. 1977/10/1 2001/9/30 .142 .355 .138 .369 .083 .59701410500 Absecon Creek at Absecon, N.J. 1945/10/1 1985/9/30 .048 .678 -.075 .513 .018 .88001411000 Great Egg Harbor River at Folsom, N.J. 1924/10/1 2001/9/30 .172 .028 .085 .282 .089 .25801411300 Tuckahoe River at Head of River, N.J. 1969/10/1 2001/9/30 .151 .241 .088 .497 .037 .78601411456 Little Ease Rn near Clayton, N.J. 1987/10/1 2001/9/30 -.051 .855 .077 .760 -.051 .85501411500 Maurice River at Norma, N.J. 1932/10/1 2001/9/30 -.020 .808 -.064 .440 -.059 .47801412000 Menantico Creek near Millville, N.J. 1930/10/1 1985/9/30 -.095 .448 -.163 .188 -.110 .377

Appendix 3 129
Table 3-2.  Results of trend tests on annual n-day high flow at 138 streamflow-gaging stations in New Jersey, New York, and Pennsylvania.—Continued

[Bold blue indicates a significant upward trend and bold red indicates a significant downward trend; USGS, U.S. Geological Survey]

USGS 

station 

number

Station name

Period of record 1-day high flow 7-day high flow 30-day high flow

Begin End Kendal Tau

p-value Kendal Tau

p-value Kendal Tau

p-value

01412500 WB Cohansey River at Seeley, N.J. 1950/10/1 1967/9/30 -0.383 0.043 -0.367 0.053 -.250 0.19201412800 Cohansey River at Seeley, N.J. 1977/10/1 1988/9/30 -.236 .350 -.236 .350 -.455 .06201434000 Delaware River at Port Jervis, N.Y. 1904/10/1 1954/9/30 .017 .867 -.118 .232 -.193 .04801434000 Delaware River at Port Jervis, N.Y. 1954/10/1 2001/9/30 -.094 .354 -.121 .233 -.036 .72701437500 Neversink River at Godeffroy, N.Y. 1954/10/1 2001/9/30 .127 .212 .023 .826 .027 .79701437500 Neversink River at Godeffroy, N.Y. 1937/10/1 1954/9/30 -.015 .967 .059 .773 .088 .65001438500 Delaware River at Montague, N.J. 1954/10/1 2001/9/30 -.080 .430 -.114 .263 -.018 .86901438500 Delaware River at Montague, N.J. 1939/10/1 1954/9/30 -.048 .843 -.029 .921 .029 .92101440000 Flat Brook near Flat Brookville, N.J. 1923/10/1 2001/9/30 .103 .184 .099 .203 .102 .18701440200 Delaware River near Delaware Water Gap, Pa. 1963/10/1 1996/9/30 .118 .359 .127 .320 .144 .26001443500 Paulins Kill at Blairstown, N.J. 1921/10/1 2001/9/30 .033 .666 .082 .290 .064 .41001443900 Yards Creek near Blairstown, N.J. 1966/10/1 2001/9/30 .061 .619 -.018 .890 .018 .89001445000 Pequest River at Huntsville, N.J. 1939/10/1 1962/9/30 .138 .369 .162 .290 .099 .53001445500 Pequest River at Pequest, N.J. 1921/10/1 2001/9/30 .384 .000 .217 .000 .139 .07001446000 Beaver Brook near Belvidere, N.J. 1922/10/1 1961/9/30 -.059 .603 .077 .500 .066 .56001446500 Delaware River at Belvidere, N.J. 1954/10/1 2001/9/30 -.032 .755 -.040 .700 .056 .58201446500 Delaware River at Belvidere, N.J. 1922/10/1 1954/9/30 .117 .355 .113 .372 .048 .70901453000 Lehigh River at Bethlehem, Pa. 1902/10/1 1990/9/30 .033 .660 .124 .100 .105 .16001455200 Pohatcong Creek at New Village, N.J. 1959/10/1 1969/9/30 -.156 .592 -.244 .371 -.200 .47401455500 Musconetcong R at out of Lake Hopatcong, N.J. 1927/10/1 1976/9/30 .032 .755 .001 1.000 .069 .50001456000 Musconetcong R near Hackettstown N.J., 1921/10/1 1974/9/30 .111 .249 .088 .360 .127 .19001457000 Musconetcong River near Bloomsbury, N.J. 1903/10/1 2001/9/30 .186 .013 .170 .020 .131 .08001457500 Delaware R at Riegelsville, N.J. 1954/10/1 1971/9/30 -.382 .036 -.382 .036 -.294 .10801457500 Delaware R at Riegelsville, N.J. 1905/10/1 1954/9/30 .038 .709 -.043 .676 -.121 .23001460440 Delaware and Raritan Canal at Port Mercer, N.J. 1989/10/1 2001/9/30 -.091 .753 .073 .815 .018 1.00001460500 Delaware and Raritan Canal at Kingston, N.J. 1946/10/1 1992/9/30 .410 .000 .463 .000 .518 .00001463500 Delaware River at Trenton, N.J. 1954/10/1 2001/9/30 -.075 .463 -.073 .474 .047 .64701463500 Delaware River at Trenton, N.J. 1912/10/1 1954/9/30 .037 .737 -.031 .778 -.080 .46101464000 Assunpink Creek at Trenton, N.J. 1954/10/1 2001/9/30 .056 .582 .086 .399 .136 .181

130 Streamflow Characteristics and Trends in New Jersey, Water Years 1897-2003
Table 3-2.  Results of trend tests on annual n-day high flow at 138 streamflow-gaging stations in New Jersey, New York, and Pennsylvania.—Continued

[Bold blue indicates a significant upward trend and bold red indicates a significant downward trend; USGS, U.S. Geological Survey]

USGS 

station 

number

Station name

Period of record 1-day high flow 7-day high flow 30-day high flow

Begin End Kendal Tau p-value Kendal Tau p-value Kendal Tau p-value

01464000 Assunpink Creek at Trenton, N.J. 1923/10/1 1954/9/30 -0.058 0.658 -0.019 0.892 -0.049 0.70801464500 Crosswicks Creek at Extonville, N.J. 1939/10/1 2001/9/30 .180 .043 .138 .120 .153 .09001465850 SB Rancocas C at Vincentown, N.J. 1960/10/1 2001/9/30 .317 .096 .250 .192 .100 .62001466000 MB Mt Misery Bk in Lebanon State Forest, N.J. 1952/10/1 1977/9/30 -.218 .328 -.077 .760 -.051 .85501466500 Mcdonalds Branch in Lebanon State Forest, N.J. 1953/10/1 2001/9/30 -.051 .612 -.026 .800 -.042 .68001467000 North Branch Rancocas Creek at Pemberton, N.J. 1921/10/1 2001/9/30 .075 .325 .087 .250 .095 .21001467081 South Branch Pennsauken Creek at Cherry Hill, N.J. 1967/10/1 2001/9/30 .042 .745 -.148 .230 -.087 .49001467150 Cooper River at Haddonfield, N.J. 1987/10/1 2001/9/30 .099 .661 -.165 .443 .077 .74301467150 Cooper River at Haddonfield, N.J. 1963/10/1 1987/9/30 .159 .286 .101 .503 .217 .14301474500 Schuylkill River at Philadelphia, Pa. 1931/10/1 1991/9/30 .000 1.000 .010 .920 .052 .56001475000 Mantua Creek at Pitman N.J., 1939/10/1 1977/9/30 .240 .044 .232 .050 .171 .15001477120 Raccoon Creek near Swedesboro, N.J. 1965/10/1 2001/9/30 .008 .955 -.069 .570 -.079 .51001482500 Salem River at Woodstown, N.J. 1939/10/1 1990/9/30 .027 .812 .057 .600 .196 .07001483000 Alloway Creek at Alloway, N.J. 1952/10/1 1973/9/30 .116 .496 .053 .770 .095 .580

Appendix 3 131
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West Trenton, NJ 08628

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