U.S. Department of the Interior

U.S. Geological Survey

Scientific Investigations Report 2010–5181

Prepared in cooperation with the Beaver Water District

Constituent Concentrations, Loads, and Yields to Beaver 

Lake, Arkansas, Water Years 1999–2008
Front cover. War Eagle Creek near Hindsville, Arkansas. Photograph provided by Robert Morgan, Beaver Water District.
Constituent Concentrations, Loads, and 

Yields to Beaver Lake, Arkansas, Water 

Years 1999–2008

By Susan E. Bolyard, Jeanne L. De Lanois, and W. Reed Green

Prepared in cooperation with the Beaver Water District

Scientific Investigations Report 2010-5181

U.S. Department of the Interior

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

KEN SALAZAR, Secretary

U.S. Geological Survey

Marcia K. McNutt, Director

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

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Suggested citation:

Bolyard, S.E., De Lanois, J.L., and Green, W.R., 2010, Constituent concentrations, loads, and yields to Beaver Lake, 

Arkansas, water years 1999–2008: U.S. Geological Survey Scientific Investigations Report 2010–5181, 43 p.
iii

Acknowledgments

The U.S. Army Corps of Engineers supported the partial-flow streamflow monitoring at White River near Fayetteville and War Eagle Creek near Hindsville. The Arkansas Natural Resources Commission supported some of the 

water-quality monitoring at White River near Fayetteville.

v

Contents

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

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

Study Area Description........................................................................................................................3

Purpose and Scope ..............................................................................................................................3

Methods...........................................................................................................................................................3

Water-Quality Data Collection and Analysis....................................................................................3

Constituent Load and Yield Estimation..............................................................................................6

Quality Assurance and Control...........................................................................................................9

Constituent Concentrations, Loads, and Yields for White River, a Tributary to Beaver Lake,

near Fayetteville ...............................................................................................................................9

Total Ammonia plus Organic Nitrogen ..............................................................................................9

Dissolved Nitrite plus Nitrate Nitrogen.............................................................................................9

Total Nitrogen ........................................................................................................................................9

Dissolved Orthophosphorus................................................................................................................9

Total Phosphorus ..................................................................................................................................9

Dissolved Organic Carbon.................................................................................................................17

Total Organic Carbon..........................................................................................................................17

Suspended Sediment .........................................................................................................................17

Constituent Concentrations, Loads, and Yields for Richland Creek, a Tributary to Beaver Lake,

at Goshen.........................................................................................................................................17

Total Ammonia plus Organic Nitrogen ............................................................................................17

Dissolved Nitrite plus Nitrate Nitrogen...........................................................................................17

Total Nitrogen ......................................................................................................................................17

Dissolved Orthophosphorus..............................................................................................................20

Total Phosphorus ................................................................................................................................20

Dissolved Organic Carbon.................................................................................................................20

Total Organic Carbon..........................................................................................................................20

Suspended Sediment .........................................................................................................................20

Constituent Concentrations, Loads, and Yields for War Eagle Creek, a Tributary to Beaver

Lake, near Hindsville......................................................................................................................20

Total Ammonia plus Organic Nitrogen ............................................................................................20

Dissolved Nitrite plus Nitrate Nitrogen...........................................................................................20

Total Nitrogen ......................................................................................................................................23

Dissolved Orthophosphorus..............................................................................................................23

Total Phosphorus ................................................................................................................................23

Dissolved Organic Carbon.................................................................................................................23

Total Organic Carbon..........................................................................................................................23

Suspended Sediment .........................................................................................................................23

Tributary Water-Quality Comparison ........................................................................................................23

Annuarl Flow-Weighted Concentrations ........................................................................................23

Annual Loads.......................................................................................................................................29

Annual Yields .......................................................................................................................................29
vi

Summary........................................................................................................................................................29

Selected References...................................................................................................................................32

Appendix 1. Water-quality data results modified from NWIS data for White River near

Fayetteville (07048600), Richland Creek at Goshen (07048800), and War Eagle Creek

near Hindsville (07049000).............................................................................................................34 

Figures

1. Map showing Beaver Lake Basin with streamflow and lake water-quality 

 measurement sites .......................................................................................................................2

2. Streamflow hydrograph with sample points for White River near Fayetteville,

Arkansas, Richland Creek at Goshen, Arkansas, and War Eagle Creek near

Hindsville, Arkansas, for water years 1999–2008 ....................................................................5

3-8. Graphs showing relation between:

 3. Nutrient and sediment concentrations and instantaneous streamflow for

 samples collected at White River near Fayetteville, Arkansas, water years

 1999–2008..............................................................................................................................11

 4. Natural log of instantaneous measured load and natural log of estimated load

 for samples collected at White River near Fayetteville, Arkansas, water years

 1999–2008..............................................................................................................................12

 5. Nutrient and sediment concentrations and instantaneous streamflow for

 samples collected at Richland Creek at Goshen, Arkansas, water years

 2001–08..................................................................................................................................18

 6. Natural log of instantaneous measured load and natural log of estimated load

 for samples collected at Goshen, Arkansas, water years 2001–08 ............................19

 7. Nutrient and sediment concentrations and instantaneous streamflow volume for

 samples collected at War Eagle Creek near Hindsville, Arkansas, water years

 2001–08..................................................................................................................................21

 8. Natural log of instantaneous measured load and natural log of estimated load

 for samples collected at War Eagle Creek near Hindsville, Arkansas, water years

 2001–08..................................................................................................................................22

9-11. Boxplots showing time series of annual load and streamflow at::

 9. White River near Fayetteville, Arkansas, water years 1999–2008 ..............................24

 10. Richland Creek at Goshen, Arkansas, water years 1999–2008....................................25

 11. War Eagle Creek near Hindsville, Arkansas, water years 1999–2008 ........................26

12. Graph showing times series of annual flow-weighted concentrations for nutrients, 

 organic carbon, and sediment at White River near Fayetteville, Richland Creek at

 Goshen, and War Eagle Creek near Hindsville, Arkansas, water years 1999–2008 ........27

13-15. Boxplots showing distributions of:

 13. Annual nutrient, organic carbon, and sediment flow-weighted concentrations

 from water samples collected at White River near Fayetteville, Arkansas,

 Richland Creek at Goshen, and War Eagle Creek near Hindsville, Arkansas, 

 water years 1999–2008 ......................................................................................................28
vii

 14. Annual nutrient, organic carbon, and sediment loads from water samples 

 collected at White River near Fayetteville, Arkansas, Richland Creek at Goshen, 

 and War Eagle Creek near Hindsville, Arkansas, water years 1999–2008...............30

 15. Annual nutrient, organic carbon, and sediment yields from water samples 

 collected at White River near Fayetteville, Arkansas, Richland Creek at Goshen, 

 and War Eagle Creek near Hindsville, Arkansas, water years 1999–2008...............31

Tables

1. Station information and streamflow statistics for continuous streamflow gaging

 stations used for water-quality monitoring in the Beaver Lake Basin, Arkansas .............4

2. Regression models developed using constituent concentrations from water 

 samples collected at water-quality stations at the White River near Fayetteville

 Arkansas, water years 1999–2008, Richland Creek at Goshen, Arkansas, and War

 Eagle Creek near Hindsville, Arkansas, water years 2001–2008 ..........................................7

3. Summary statistics of constituent concentrations from water samples collected at

 water-quality stations for the White River near Fayetteville, Arkansas, water years

 1999–2008, Richland Creek at Goshen, Arkansas, and War Eagle Creek near Hindsville, 

 Arkansas, water years 2001–2008............................................................................................10

4. Estimated total annual constituent load from constituent concentrations in water

 samples collected at water-quality stations for the White River near Fayetteville,

 Arkansas, water years 1999–2008, Richland Creek at Goshen, Arkansas, and War 

 Eagle Creek near Hindsville, Arkansas, water years 2001–08 ............................................13

5. Estimated mean annual constituent loads and yield estimated from constituent

 concentrations in water samples collected at water-quality stations for the

 White River near Fayetteville, Arkansas, water years 1999–2008, Richland Creek at

 Goshen, Arkansas, and War Eagle Creek near Hindsville, Arkansas, water years

 2001–08 .........................................................................................................................................15

6. Estimated mean annual constituent loads, mean annual streamflows, and mean 

 flow-weighted constituent concentrations at water-quality stations for the

 White River near Fayetteville, Arkansas, water years 1999–2008, Richland Creek at

 Goshen, Arkansas, and War Eagle Creek near Hindsville, Arkansas, water years

 2001–08 .........................................................................................................................................16
viii

Conversion Factors

Multiply By To obtain

Length

kilomter (km) 0.6214 mile (mi)

meter (m) 3.281 foot (ft)

Area

square kilometer (km2) 0.3861 square mile (mi2)

Volume

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

Flow rate

cubit meter per second (m3/s) 35.315 cubic foot per second (ft3/s)

Mass

kilogram (kg) 2.250 pound avoirdupois (lb)

kilogram per day (kg/d) 2.205 pound per day (lb/d)

kilogram per year (kg/yr) 2.205 pound per years (lg/yr)

kilogram per year per square

kilometer (kg/yr/km2)

5.710 pound per year per square mile

(lb/yr/mi2)

Vertical coordinate information is referenced to the North American Vertical Datum of 1988 (NAVD 88).)

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

 Altitude, as used in this report, refers to distance above the vertical datum.

Concentrations of chemical constituents in water are given either in milligrams per liter (mg/L) or micrograms per liter 

(μg/L).

Estimated concentration (“E” remark code)—Positive detections below the LRL are not censored. Detected analytes with 

concentrations between the LT-MDL and LRL are reported as estimated (“E” remark code). This is because a detection in 

this region should have a < 1 – percent probability of being a false positive (Childress and others, 1999). There are several 

circumstances that dictate this code; this is one of the most common.

Laboratory reporting level (LRL)—Generally equal to twice the yearly determined LT-MDL. The LRL controls false negative 

error. The probability of falsely reporting a non-detection for a sample that contained an analyte at a concentration equal 

to or greater than the LRL is predicted to be less than or equal to 1 percent. The value of the LRL will be reported with 

a “less than” remark code for samples in which the analyte was not detected. The National Water Quality Laboratory 

collects quality-control data from selected analytical methods on a continuing basis to determine long-term method 

detection levels (LT-MDL’s) and establish laboratory reporting levels (LRL’s). These values are re-evaluated annually based 

on the most current quality-control data and may, therefore, change (Childress and others, 1999).

Long-term method detection level (LT-MDL)—A detection level derived by determining the standard deviation of a minimum 

of 24 MDL spike sample measurements over an extended period of time. LT-MDL data are collected on a continuous basis 

to assess year-to-year variations in the LT-MDL. The LT-MDL controls false positive error. The chance of falsely reporting 

a concentration at or greater than the LT-MDL for a sample that did not contain the analyte is predicted to be less than or 

equal to 1 percent (Childress and others, 1999).
ix

Method detection limit (MDL)—Minimum concentration of a substance that can be measured and reported 

with 99-percent confidence that the analyte concentration is greater than zero. It is determined from the 

analysis of a sample in a given matrix containing the analyte (U.S. Environmental Protection Agency, 1997). At 

the MDL concentration, the risk of a false positive is predicted to be less than or equal to 1 percent (Childress 

and others, 1999). 

Minimum reporting level (MRL)—Smallest measured concentration of a constituent that may be reliably 

reported by using a given analytical method (Timme, 1995).

Water year (WY)—Is the period October 1 through September 30 designated by the calendar year in which 

it ends, for example, the 2008 water year runs from October 1, 2007 to September 30, 2008 (Rantz and 

others,1982).
Constituent Concentrations, Loads, and Yields to Beaver 

Lake, Arkansas, Water Years 1999–2008

By Susan E. Bolyard, Jeanne L. De Lanois, and W. Reed Green

Abstract 

Beaver Lake is a large, deep-storage reservoir used as a 

drinking-water supply and considered a primary watershed 

of concern in the State of Arkansas. As such, information is 

needed to assess water quality, especially nutrient enrichment, 

nutrient-algal relations, turbidity, and sediment issues within 

the reservoir system. Water-quality samples were collected at 

three main inflows to Beaver Lake: the White River near Fayetteville, Richland Creek at Goshen, and War Eagle Creek near 

Hindsville. Water-quality samples collected over the period 

represented different flow conditions (from low to high). Constituent concentrations, flow-weighted concentrations, loads, 

and yields from White River, Richland Creek, and War Eagle 

Creek to Beaver Lake for water years 1999–2008 were documented for this report. Constituents include total ammonia 

plus organic nitrogen, dissolved nitrite plus nitrate nitrogen, 

dissolved orthophosphorus (soluble reactive phosphorus), total 

phosphorus, total nitrogen, dissolved organic carbon, total 

organic carbon, and suspended sediment. Linear regression 

models developed by computer program S-LOADEST were 

used to estimate loads for each constituent for the 10-year 

period at each station. Constituent yields and flow-weighted 

concentrations for each of the three stations were calculated 

for the study. 

Constituent concentrations and loads and yields varied 

with time and varied among the three tributaries contributing 

to Beaver Lake. These differences can result from differences 

in precipitation, land use, contributions of nutrients from point 

sources, and variations in basin size. Load and yield estimates 

varied yearly during the study period, water years 1999–2008, 

with the least nutrient and sediment load and yields generally 

occurring in water year 2006, and the greatest occurring in 

water year 2008, during a year with record amounts of precipitation. Flow-weighted concentrations of most constituents 

were greatest at War Eagle Creek near Hindsville than White 

River near Fayetteville and Richland Creek at Goshen. Loads 

and yields of most constituents were greater at the War Eagle 

Creek and White River stations than at the Richland Creek 

Station. 

Introduction

Beaver Lake (fig. 1) is a large, deep-storage reservoir 

located in the White River Basin in northwestern Arkansas. 

The reservoir was completed in 1963 for the purposes of flood 

control, hydroelectric power, and water supply. Beaver Lake 

is the primary drinking-water supply for northwestern Arkansas. In addition, the reservoir is used for fish and wildlife 

habitat, and for recreation, and receives wastewater-treatment 

plant outflow. Because of the importance of Beaver Lake, it 

is considered a primary watershed of concern for the State of 

Arkansas. Information is needed to assess water quality, especially nutrient enrichment, nutrient-algal relations, turbidity, 

and sediment issues within the reservoir system. 

The U.S. Geological Survey (USGS) along with the U.S. 

Army Corps of Engineers (USACE) has monitored streamflow 

into Beaver Lake since it was impounded in 1963, including a discontinued station at the White River, downstream 

from Beaver Dam in Table Rock Lake since 1909. In 1999, 

streamflow-gaging stations at White River near Fayetteville 

(USGS station number 07048600) and War Eagle Creek near 

Hindsville (USGS station number 07049000) were converted 

from partial-record stations (supported by the USACE) to 

continuous-record stations, and a new streamflow-gaging 

station was established on Richland Creek at Goshen (USGS 

station number 07048800), in cooperation with Beaver Water 

District. Also, periodic water-quality samples were collected 

at the White River near Fayetteville station in cooperation 

with Arkansas Soil and Water Conservation Commission, now 

Arkansas Natural Resources Commission. In 2001, USGS in 

cooperation with Beaver Water District modified the White 

River near Fayetteville water-quality sampling and initiated 

water-quality sampling at both the Richland Creek and War 

Eagle Creek stations. Water-quality sampling has continued 

at all three stations to present. Data collected by the USGS in 

cooperation with Beaver Water District from water years 1999 

through 2008 are summarized in this report (appendix 1). A 

water year is the period October 1 through September 30 designated by the calendar year in which it ends. The USGS, in 

cooperation with Beaver Water District, used streamflow and 
2 Constituent Concentrations, Loads, and Yields to Beaver Lake, Arkansas, Water Years 1999–2008

EXPLANATION

Beaver Lake Basin

Streamflow-gaging station with associated

identification number

Water-quality measurement station with

associated identification number 

07048600

07049000

#

#

62

412

23

12

45

Beaver Lake

Prairie

Creek

Richland Creek

Creek

Eagle

War

River

Fork

West

White

LOCATION MAP

ARKANSAS

Area

enlarged

07048910

#

#

#

07048600

07048700#

#

# 07048930

#

07049690

##07048480

07048490

#

07049200

#

#

#

#

#

#

07049500

07049000

07048800

07048550

36°00’

36°18’

94°12’ 93°36’

Fayetteville

Springdale

Rogers

Lowell

Goshen

Hindsville

Sonora

Huntsville

West Fork

Eureka

Springs

Berryville

MADISON

CARROLL

WASHINGTON

BENTON

0

0 2.5 5 KILOMETERS

Base from U.S. Geological Survey digital data, 1:100,000 2.5 5 MILES

Figure 1. Beaver Lake Basin with streamflow and lake water-quality measurement sites (from Galloway and Green, 2006b).
Methods 3

water-quality data in a study to evaluate constituent concentrations and loads to Beaver Lake.

Study Area Description

Beaver Lake was impounded in 1963 on the White River, 

northeast of the city of Fayetteville, Arkansas, and in 1968, the 

reservoir reached conservation capacity (Haggard and Green, 

2002). The conservation capacity of the reservoir is the storage 

capacity used for hydroelectric power, water supply, fish and 

wildlife, recreation, and water quality (U.S. Army Corps of 

Engineers, 1997). The basin has a drainage area of 3.087 km2

at the Beaver Lake Dam. Beaver Lake contains 6,693 million m3

 (1,653,833 acre-ft) of water at the top of the current 

conservation pool (341.5 m above NAVD of 1988) at a surface 

area of 114 km2 (Haggard and Green, 2002). The length of the 

reservoir is 80 km from the White River at the Highway 45 

Bridge to the Beaver Lake Dam. The depth of the reservoir at 

the dam at conservation pool elevation is 60 m, and the average depth through the reservoir is 17 m (Haggard and Green, 

2002).

Beaver Lake is affected by point and nonpoint sources 

of nutrients, sediment, and pathogens. The city of Fayetteville 

discharges about one-half of its treated sewage effluent into 

the White River immediately upstream from the backwater of 

the reservoir—however, the discharge is located downstream 

from the station where the sample was collected (USGS station 07048600). The city of West Fork discharges its treated 

sewage effluent into the West Fork of the White River, and 

the city of Huntsville discharges treated sewage effluent into 

a tributary of War Eagle Creek. Nutrients, sediment, pathogenic bacteria, and other constituents unrelated to municipal 

wastewater also can enter Beaver Lake through its tributaries 

and around its shoreline. The greatest increase in population in 

the State of Arkansas from 1990 to 2000 occurred in Benton, 

Washington, and Carroll Counties in northwestern Arkansas 

surrounding Beaver Lake where the population increased 

from approximately 239,000 to 335,000 (U.S. Census Bureau, 

2009). The principal agricultural activity in the area is poultry 

production and secondarily, cattle production. As a result of all 

these factors, there is substantial concern about the current and 

future water quality of Beaver Lake. 

The main inflows into Beaver Lake are the White River, 

Richland Creek, and War Eagle Creek (fig. 1). Several smaller 

tributaries also flow into the reservoir. The Basin has a drainage area of 2,968 km2

 upstream from Beaver Lake Dam. The 

White River is the largest tributary to Beaver Lake with a 

drainage area of 1,040 km2 upstream from the streamflowgaging station near Fayetteville (White River near Fayetteville, Arkansas, USGS station number 07048600), composing 

approximately 35 percent of the drainage area of Beaver Lake 

at the dam. War Eagle Creek is the second largest tributary to Beaver Lake with a drainage area of 681 km2

 at the 

streamflow-gaging station near Hindsville (War Eagle Creek 

near Hindsville, Arkansas, USGS station number 07049000), 

composing approximately 22 percent of the Beaver Lake 

Basin upstream from the dam. Richland Creek is another 

major tributary to Beaver Lake, with a drainage area of 357 

km2 upstream from the streamflow-gaging station at Goshen 

(Richland Creek at Goshen, Arkansas, USGS station number 

07048800), composing approximately 12 percent of the drainage area of Beaver Lake upstream from the dam. Combined, 

these three tributaries (at the streamflow-gaging stations) 

represent approximately 69 percent of the total drainage area 

of Beaver Lake. 

Purpose and Scope

 The purpose of this report is to describe constituent concentrations, flow-weighted concentrations, loads, and yields to 

Beaver Lake for White River, Richland Creek, and War Eagle 

Creek for the study period, water years 1999–2008. Constituents include total ammonia plus organic nitrogen, dissolved 

nitrite plus nitrate nitrogen, total nitrogen, dissolved orthophosphorus (soluble reactive phosphorus), total phosphorus, 

dissolved organic carbon, total organic carbon, and suspended 

sediment. 

Methods 

Water-Quality Data Collection and Analysis

The USGS operates 7 continuous streamflow-gaging 

stations and 10 water-quality sampling stations in the Beaver 

Lake Basin in northwestern Arkansas (fig. 1). Three streamflow-gaging stations with water-quality sampling at the same 

stations were selected for use in this report: White River near 

Fayetteville, Arkansas (USGS station 07048600), Richland 

Creek at Goshen, Arkansas (USGS station 07048800), and 

War Eagle Creek near Hindsville, Arkansas (USGS station 

07049000) (table 1, fig. 1). Stream gages were operated 

and streamflows were measured according to the methods 

described in Rantz and others (1982). Streamflow, in cubic 

feet per second, was computed every 15 minutes and averaged 

daily from 1999 through 2008 (and continues) at White River 

near Fayetteville, Richland Creek at Goshen, and War Eagle 

Creek near Hindsville, and was converted to cubic meters per 

second for this report (fig. 1, table 1). Water-quality samples, 

with corresponding instantaneous streamflows (streamflow 

at the time of sample collection), were collected during low-, 

moderate-, and high-flow conditions (fig. 2). The White 

River near Fayetteville water-quality sampling record began 

with bimonthly (occurring every 2 months) and high-flow 

event sampling from November 1999 through October 2000. 

Monthly and high-flow event samples were collected at the 

White River near Fayetteville beginning in January 2001 

and at Richland Creek at Goshen and War Eagle Creek near 
4 Constituent Concentrations, Loads, and Yields to Beaver Lake, Arkansas, Water Years 1999–2008

Table 1. Station information and streamflow statistics for continuous streamflow gaging stations used for water-quality monitoring in the Beaver Lake Basin, Arkansas.[WY, water year; ddmmss, degrees, minutes, seconds in NGVD of 1929; km2, square kilometer; m3/s, cubic meter per second]

Station name 

(number)

Period of 

record for 

station 

(WY)

Latitude 

(ddmmss)

Longitude 

(ddmmss)

Drainage 

area 

(km2)

Mean annual (WY) streamflow (m3/s)

Minimum and maximum

daily mean streamflow

for study period, 

10/01/1998 – 09/30/2008 

(m3/s)

1999 2000 2001 2002 2003 2004 2005 2006 2007 2008

Period

of

record

Minimum 

(date)

Maximum 

(date)

White River near

Fayetteville (07048600)

1964– 1994; 1999–2008 

360423 940452 1,040 16.7 11.8 11.6 20.7 8.58 21.0 14.0 5.38 14.8 24.7 14.9 0.007 (09/18/2000) 1,340 (04/24/2004)

Richland Creek 

at Goshen (07048800)

1999–2008 360615 940027 357 5.75 2.94 2.64 5.61 2.14 6.65 4.33 1.64 3.68 14.6 4.98 0.003 (08/03/2006) 957 (04/10/2008)

War Eagle Creek 

near Hindsville (07049000)

1953–1970;1999–2008

361200 935118 681 11.8 5.58 5.64 12.2 4.08 8.16 8.44 3.60 8.35 15.5 8.32 0.232 (10/11/2005) 767 (03/19/2008)
Methods 5

01/01/1998

01/01/1999

01/01/2000

01/01/2001

01/01/2002

01/01/2003

01/01/2004

01/01/2005

01/01/2006

01/01/2007

01/01/2008

01/01/2009

DATE

10,000

1,000

100

10

1

0.1

0.01

0.001

10,000

1,000

100

10

1

0.1

0.01

0.001

10,000

1,000

100

10

1

0.1

STREAMFLOW, IN CUBIC METERS PER SECOND

White River near Fayetteville

Richland Creek at Goshen

War Eagle Creek near Hindsville

EXPLANATION

Daily mean streamflow

Sample associated with streamflow

Figure 2. Streamflow hydrograph with sample points for White River near Fayetteville, Arkansas, Richland Creek at Goshen, Arkansas, 

and War Eagle Creek near Hindsville, Arkansas, for water years 1999–2008.
6 Constituent Concentrations, Loads, and Yields to Beaver Lake, Arkansas, Water Years 1999–2008

Hindsville beginning in April 2001. Samples were collected 

through November 2004. Bimonthly and high-flow event 

samples were collected at all three stations from January 

2005 through September 2008. Representative water-quality 

samples were collected using equal-width increment methods 

(Edwards and Glysson, 1999).

The USGS National Water Quality Laboratory in 

Lakewood, Colorado, analyzed the water-quality samples for 

total ammonia plus organic nitrogen, dissolved nitrite plus 

nitrate, dissolved orthophosphorus, total phosphorus, total 

nitrogen (Fishman, 1993), dissolved organic carbon (Brenton 

and Arnett, 1993), and total organic carbon (Wershaw and 

others, 1987). Constituent concentrations were reported as 

uncensored values if they were greater than the laboratory 

reporting level (LRL). The LRL is set to reduce false positive 

error and is equal to twice the yearly determined long-term 

method detection level (LT-MDL). When the constituent was 

not detected, the LRL value was reported with a “less than” 

remark code and was considered a censored value. Estimated 

values with concentrations between the LT-MDL and the LRL 

are reported with an “E” remark code because of low confidence in the value (Childress and others, 1999). For the purposes of describing the mean and computing loads, censored 

values were converted to the LT-MDL value (with the “less 

than” remark code), if the LRL was reported at the time of the 

sample analysis, and “E” remark codes were removed. If the 

censored values were reported as less than the LT-MDL at the 

time of analysis, no alteration was made. The modified waterquality values with remark codes described above, which 

were used to determine the mean and loads, are found in the 

appendix (appendix 1).

Suspended-sediment samples were collected during low-, 

moderate-, and high-flow conditions. The USGS Missouri 

Water Science Center Sediment Laboratory in Rolla, Missouri, 

analyzed samples for suspended-sediment concentration following procedures established in Guy (1969).

Streamflow data measured from October 1998 through 

December 2008 are presented in this report. All streamflow 

data described are available on the web at http://water.usgs.

gov/ar/nwis. 

Constituent Load and Yield Estimation 

Linear regression models developed by computer program S-LOADEST were used to estimate loads for each constituent for the 10–year period at each station (table 2). Data 

from all three tributaries generally appeared to fit the models. 

Load is the mass of a constituent transported past a selected 

point in a stream in a given amount of time, usually 1 year. 

The S-LOADEST program (TIBCO Software Inc., 2008) was 

used to estimate constituent loads by the rating-curve method 

(Cohn and others, 1989; Crawford, 1991) for the White River, 

Richland Creek, and War Eagle Creek stations. S-LOADEST 

estimates loads using mean daily streamflow, streamflow 

rating-curve parameters, several regression methods, and a 

ratio estimator. Because some of the constituent concentrations included in the S-LOADEST analyses were censored 

values, parameters were estimated by the adjusted maximum 

likelihood estimation (AMLE) method (Cohn, 1988; Cohn and 

others, 1992). In the absence of censored data, the method 

converts to the maximum likelihood estimation (MLE) method 

(Dempster and others, 1977; Wolynetz, 1979). Uncertainty in 

the estimated load was obtained using the method described 

by Likes (1980) and Gilroy and others (1990). The model 

(equation 1) used to calculate loads was based on the relation 

between the natural logarithms of L and Q:

ln(L) = b0 + b1 ln(Q)

where

ln is natural logarithm;

L is constituent load, in kilograms per day

 (kg/d);

b0 is regression constant, dimensionless;

b1 is a regression coefficient, dimensionless;

Q is daily mean streamflow, in cubic meters

 per second (m3/s).

Estimated mean annual constituent loads and standard 

error of prediction (SEP) of the mean loads were calculated by 

S-LOADEST using all available data for each constituent for 

the 10-year period. The coefficient of determination (R2) is the 

proportion of variability in the data set that is accounted for 

by the statistical model. For this report, an R2 value of 0.90 

or greater was considered a valid regression model. R2 values 

less than 0.90, which demonstrates a positive relation, were 

not considered valid. Estimated residual variance is the maximum likelihood estimation variance corrected for the number 

of observations, number of censored observations, and number 

of parameters in the regression model. 

The 95-percent confidence interval is the interval that 

has a 95-percent chance of containing the true regression line. 

In contrast, the 95-percent prediction interval is the interval 

in which you expect 95 percent of all data points to fall. A 

major factor determining the width of a confidence interval is 

the size of the sample used in the estimation procedure, with 

smaller samples having wider confidence intervals (Helsel and 

Hirsch, 2002).

Constituent yields for each of the three stations were 

calculated by dividing mean annual constituent load by the 

drainage area, in square kilometers (table 1). Flow-weighted 

concentrations for each of the three stations were calculated 

by dividing mean annual constituent loads by mean annual 

streamflow and multiplying by a conversion factor to adjust 

the units.

Linear regression was used to examine the relations 

between estimated daily loads and measured instantaneous 

loads, both reported in kilograms per day. Instantaneous load 

is calculated by multiplying streamflow, in cubic meters per 

second, constituent concentration, in milligrams per liter, 

and a conversion factor to convert to kilograms per day. The 
Methods 

7

Table 2. Regression models developed using constituent concentrations from water samples collected at water-quality stations at the White River near Fayetteville, Arkansas, water years 1999–2008, Richland Creek at Goshen, Arkansas, and War Eagle Creek near Hindsville, Arkansas, water years 2001–08.—Contiinued[N, nitrogen; ln, natural logarithm; L, daily load in kilograms per day; Q, daily mean streamflow in cubic meter per second; P, phosphorus]

Station name

(number)

Constituent

(parameter code)

Number of

observations

Number of

censored

observations1

Regression model

Estimated

residual

variance2

Coefficient of

determination

 (R2)

White River nearFayetteville (07048600) Total ammonia + organic nitrogen, as N (00625) 146 28 ln(L) = 5.29 + 1.13*lnQ 0.936 0.87

Dissolved nitrite + nitrate, as N (00631) 146 0 ln(L) = 5.42 + 1.15*lnQ 0.419 0.94Total nitrogen (00600) 118 0 ln(L) = 6.31 + 1.16*lnQ 0.146 0.98Dissolved orthophosphorus, as P (00671) 146 81 ln(L) = 1.03 + 1.38*lnQ 1.48 0.87Total phosphorus (00665) 146 37 ln(L) = 3.03 + 1.42*lnQ 1.19 0.90Dissolved organic carbon (00681) 104 0 ln(L) = 6.96 + 1.02*lnQ 0.321 0.94Total organic carbon (00680) 103 0 ln(L) = 7.13 + 1.09*lnQ 0.424 0.93Suspended sediment (80154) 146 0 ln(L) = 10.2 + 1.40*lnQ 0.674 0.94

Richland Creek atGoshen (07048800) Total ammonia + organic nitrogen, as N (00625) 102 38 ln(L) = -3.61 + 1.05*lnQ 1.26 0.97

Dissolved nitrite + nitrate, as N (00631) 102 2 ln(L) = -2.33 + 1.05*lnQ 1.51 0.96Total nitrogen (00600) 62 0 ln(L) = -0.771 + 1.04*lnQ 0.427 0.99Dissolved orthophosphorus, as P (00671) 102 60 ln(L) = -7.38 + 1.06*lnQ 2.24 0.94Total phosphorus (00665) 102 51 ln(L) = -6.58 + 1.11*lnQ 2.55 0.94Dissolved organic carbon (00681) 102 0 ln(L) = -0.959 + 1.03*lnQ 0.418 0.99Total organic carbon (00680) 102 0 ln(L) = -0.921 + 1.04*lnQ 0.476 0.99Suspended sediment (80154) 102 0 ln(L) = 1.04 + 1.10*lnQ 1.28 0.97
8 Constituent Concentrations, Loads, and Yields to Beaver Lake, Arkansas, Water Years 1999–2008

Table 2. Regression models developed using constituent concentrations from water samples collected at water-quality stations at the White River near Fayetteville, Arkansas, water years 1999–2008, Richland Creek at Goshen, Arkansas, and War Eagle Creek near Hindsville, Arkansas, water years 2001–08.—Contiinued[N, nitrogen; ln, natural logarithm; L, daily load in kilograms per day; Q, daily mean streamflow in cubic meter per second; P, phosphorus]

Station name

(number)

Constituent

(parameter code)

Number of

observations

Number of

censored

observations1

Regression model

Estimated

residual

variance2

Coefficient of

determination

 (R2

)

War Eagle Creek nearHindsville (07049000) Total ammonia + organic nitrogen, as N (00625) 100 36 ln(L) = 4.76 + 1.20*lnQ 0.959 0.82

Dissolved nitrite + nitrate, as N (00631) 100 0 ln(L) = 6.52 + 0.997*lnQ 0.202 0.94Total nitrogen (00600) 64 0 ln(L) = 7.02 + 1.10*lnQ 0.111 0.98Dissolved orthophosphorus, as P (00671) 100 18 ln(L) = 2.58 + 1.12*lnQ 1.05 0.79Total phosphorus (00665) 100 11 ln(L) = 3.49 + 1.28*lnQ 0.613 0.89Dissolved organic carbon (00681) 100 0 ln(L) = 7.21 + 1.14*lnQ 0.336 0.92Total organic carbon (00680) 98 0 ln(L) = 7.36 + 1.19*lnQ 0.331 0.93Suspended sediment (80154) 100 1 ln(L) = 9.86 + 1.41*lnQ 1.02 0.86

1Censored observations are a result of an analysis value lower than the laboratory minimum reporting level.2Estimated residual variance is the maximum likelihood estimation variance corrected for the number of observations, number of censored observations, and number of parameters in 

the regression model.
Constituent Concentrations, Loads, and Yields for White River, a Tributary to Beaver Lake, near Fayetteville 9

slope of the regression relates to how well the loading model 

estimates constituent loading. A line originating at zero with a 

slope of 1.0 would be the ideal relation.

Means, along with maxima, minima, and medians, were 

determined by an S-Plus software (TIBCO Software Inc., 

2008) data summary statistics application applied to the data 

in appendix 1 (table 3).

Quality Assurance and Control

Field methods were conducted following procedures 

described in the USGS National Field Manual (U.S. Geological Survey, variously dated). Nutrient, total organic carbon, 

and dissolved organic carbon analyses were conducted at the 

USGS National Water Quality Laboratory in Denver, Colorado, following procedures described in Fishman (1993). SSC 

analyses were conducted at the USGS laboratory in Rolla, 

Missouri, following procedures described in Guy (1969). 

Field measurements, including water temperature, dissolvedoxygen concentration, pH, and specific conductance also were 

collected with each sample following protocols described in 

Wilde and Radke (1998). 

To maintain proper quality assurance and control (QA/

QC) of water-quality data, protocols for instrument calibration 

(Wilde and Radke, 1998) and equipment cleaning (Wilde and 

others, 1998) were followed. Associated blank and replicate 

water-quality samples also were collected by USGS personnel 

periodically. Results indicated that cleaning procedures were 

adequate in preventing cross-contamination of samples and 

that the laboratory results were reproducible. Results for QA/

QC samples are available at the USGS National Water Information System webpage (http://waterdata.usgs.gov/nwis) and 

can be obtained through the USGS Arkansas Water Science 

Center in Little Rock, Arkansas. 

Constituent Concentrations, Loads, and 

Yields for White River, a Tributary to 

Beaver Lake, near Fayetteville

Total Ammonia plus Organic Nitrogen

Total ammonia plus organic nitrogen concentrations for 

White River near Fayetteville ranged from less than 0.06 to 

2.6 mg/L as N with a mean concentration of 0.48 mg/L as N 

(table 3). Concentrations tended to increase with increasing 

streamflow (fig. 3). Loads were estimated as a function of 

streamflow (R2 = 0.87; table 2). These estimated loads then 

were compared to instantaneous measured load with a slope 

of 0.88 (fig. 4). For total ammonia plus organic nitrogen, 

the 10-year mean load was 294,000 kg/yr as N (table 4) and 

mean yield was 283 kg/yr/km2 as N (table 5). Estimated mean 

annual flow-weighted concentration was 0.61 mg/L as N (table 

6).

Dissolved Nitrite plus Nitrate Nitrogen

Dissolved nitrite plus nitrate concentrations for White 

River near Fayetteville ranged from 0.03 to 1.4 mg/L as 

N with a mean concentration of 0.44 mg/L as N (table 3). 

Concentrations tended to increase with increasing streamflow 

(fig. 3). Loads were estimated as a function of streamflow (R2 

= 0.94; table 2). These estimated loads were then compared 

to instantaneous measured load with a slope of 0.90 (fig. 4). 

For dissolved nitrate plus nitrite, the 10-year mean load was 

273,000 kg/yr as N (table 4) and mean yield was 262 kg/yr/

km2 as N (table 5). Estimated mean annual flow-weighted 

concentration was 0.57 mg/L as N (table 6).

Total Nitrogen

Total nitrogen concentrations for White River near Fayetteville ranged from 0.31 to 3.0 mg/L with a mean concentration of 0.98 mg/L (table 3). Concentrations tended to increase 

with increasing streamflow (fig. 3). Loads were estimated as 

a function of streamflow (R2 = 0.98; table 2). These estimated 

loads were then compared to instantaneous measured load 

with a slope of 0.94 (fig. 4). For total nitrogen, the 10-year 

mean load was 593,000 kg/yr (table 4) and mean yield 

was 570 kg/yr/km2 (table 5). Estimated mean annual flowweighted concentration was 1.23 mg/L (table 6). 

Dissolved Orthophosphorus 

Dissolved orthophosphorus concentrations for White 

River near Fayetteville ranged from less than 0.003 to 0.110 

mg/L as P with a mean concentration of 0.015 mg/L as P (table 

3). Concentrations tended to increase slightly with increasing streamflow (fig. 3). Loads were estimated as a function of 

streamflow (R2 = 0.87; table 2). These estimated loads were 

then compared to instantaneous measured load with a slope 

of 1.09 (fig. 4). For dissolved orthophosphorus, the 10-year 

mean load was 10,300 kg/yr as P (table 4) and mean yield was 

10 kg/yr/km2 as P (table 5). Estimated mean annual flowweighted concentration was 0.02 mg/L as P (table 6).

Total Phosphorus

Total phosphorus concentrations for White River near 

Fayetteville ranged from less than 0.010 to 0.600 mg/L with a 

mean concentration of 0.084 mg/L (table 3). Concentrations 

tended to increase with increasing streamflow (fig. 3). Loads 

were estimated as a function of streamflow (R2 = 0.90; table 

2). These estimated loads were then compared to instantaneous measured load with a slope of 0.96 (fig. 4). For total 

phosphorus, the 10-year mean load was 73,200 kg/yr (table 4) 
10 Constituent Concentrations, Loads, and Yields to Beaver Lake, Arkansas, Water Years 1999–2008 Table 3. Summary statistics of constituent concentrations from water samples collected at water-quality stations for the White River near Fayetteville, Arkansas, water years 1999 – 2008, Richland Creek at Goshen, Arkansas, and War Eagle Creek near Hindsville, Arkansas, water years 2001-2008. [mg/L, milligram per liter; N, nitrogen; P, phosphorus; <, less than the method detection level. All concentration data, including censored data, were used to calculate statistics] Constituent concentrations Station name (number) Constituent (parameter code) Minimum (mg/L) Median (mg/L) Mean (mg/L) Maximum (mg/L) Number of observations Number of censored observations White River near Fayetteville (07048600) Total ammonia + organic nitrogen, as N (00625) 0.06 0.32 0.48 2.6 146 28 Dissolved nitrite + nitrate, as N (00631) 0.03 0.37 0.44 1.4 146 0 Total nitrogen (00600) 0.31 0.78 0.98 3.0 118 0 Dissolved orthophosphorus, as P (00671) <0.003 0.004 0.015 0.110 146 81 Total phosphorus (00665) <0.010 0.030 0.084 0.600 146 37 Dissolved organic carbon (00681) 0.8 2.4 2.8 10.9 104 0 Total organic carbon (00680) 0.7 2.7 3.6 19.5 103 0 Suspended sediment (80154) 2 32 97 950 146 0 Richland Creek at Goshen (07048800) Total ammonia + organic nitrogen, as N (00625) <0.05 0.16 0.29 1.6 102 38 Dissolved nitrite + nitrate, as N (00631) 0.01 0.825 0.850 3.9 102 2 Total nitrogen (00600) 0.20 1.0 1.2 4.1 62 0 Dissolved orthophosphorus, as P (00671) <0.003 0.004 0.017 0.207 102 60 Total phosphorus (00665) 0.007 0.009 0.044 0.440 102 51 Dissolved organic carbon (00681) 0.6 1.7 2.56 25.4 102 0 Total organic carbon (00680) 0.7 1.9 3.00 19.5 102 0 Suspended sediment (80154) 1 22 58 1,050 102 0 War Eagle Creek near Hindsville (07049000) Total ammonia + organic nitrogen, as N (00625) <0.05 0.185 0.28 2.3 100 36 Dissolved nitrite + nitrate, as N (00631) 0.257 1.12 1.16 2.36 100 0

Total nitrogen (00600) 0.58 1.4 1.5 2.7 64 0Dissolved orthophosphorus, as P (00671) <0.003 0.020 0.029 0.190 100 18Total phosphorus (00665) 0.018 0.040 0.064 0.460 100 11Dissolved organic carbon (00681) 0.7 1.6 2.6 29.8 100 0Total organic carbon (00680) 0.6 1.8 2.8 21.6 100 0Suspended sediment (80154) <0.5 25 50 727 100 1
Constituent Concentrations, Loads, and Yields for White River, a Tributary to Beaver Lake, near Fayetteville 11

0.01 0.1 1 10 100 1,000 10,000 0.01 0.1 1 10 100 1,000 10,000

INSTANTANEOUS STREAMFLOW, IN CUBIC METERS PER SECOND

CONCENTRATION, IN MILLIGRAMS PER LITER

0.1

1

10

0.01

0.1

1

10

0.1

1

10

100

0.001

0.01

0.1

1

10

0.01

0.1

1

10

0.01

0.1

1

10

100

1,000

0.001

0.01

0.1

1

0.1

1

10

100

TOTAL AMMONIA PLUS ORGANIC NITROGEN

AS NITROGEN

DISSOLVED NITRITE PLUS NITRATE NITROGEN 

DISSOLVED ORTHOPHOSPHORUS AS PHOSPHORUS 

TOTAL PHOSPHORUS

TOTAL NITROGEN

DISSOLVED ORGANIC CARBON

TOTAL ORGANIC CARBON SUSPENDED SEDIMENT

Regression line

95 percent confidence interval of the regression

95 percent confidence interval of the prediction

Censored sample value

Measured sample value

EXPLANATION

Figure 3. Relation between nutrient and sediment concentrations and instantaneous streamflow for samples collected at White River 

near Fayetteville, Arkansas, water years 1999–2008.
12 Constituent Concentrations, Loads, and Yields to Beaver Lake, Arkansas, Water Years 1999–2008

NATURAL LOG OF INSTANTANEOUS MEASURED LOAD,

IN KILOGRAMS PER DAY

0 2 4 6 8 10 12 14 16 18 20

0 2 4 6 8 10 12 14 16

0 2 4 6 8 10 12 14 16

-8 -6 -4 -2 0 2 4 6 8 10 12

-6 -4 -2 0 2 4 6 8 10 12 14

-2 0 2 4 6 8 10 12 14 -4 -2 0 2 4 6 8 10 12 14

-2 0 2 4 6 8 10 12 14

-4

-2

0

2

4

6

8

10

12

14

-10

-5

0

5

10

15

0

2

4

6

8

10

12

14

16

0

2

4

6

8

10

12

14

16

18

20

-2

0

2

4

6

8

10

12

14

-6

-4

-2

0

2

4

6

8

10

12

14

NATURAL LOG OF ESTIMATED LOAD, IN KILOGRAMS PER DAY

-2

0

2

4

6

8

10

12

14

0

2

4

6

8

10

12

14

16

TOTAL AMMONIA PLUS

ORGANIC NITROGEN AS

NITROGEN

DISSOLVED NITRITE PLUS

NITRATE NITROGEN 

DISSOLVED ORTHOPHOSPHORUS

AS PHOSPHORUS 

TOTAL PHOSPHORUS

TOTAL NITROGEN

DISSOLVED ORGANIC CARBON

TOTAL ORGANIC CARBON SUSPENDED SEDIMENT

Regression line

95 percent confidence interval of the regression

95 percent confidence interval of the prediction

Sample value

EXPLANATION

Figure 4. Relation between natural log of instantaneous measured load and natural log of estimated load for samples collected at 

White River near Fayetteville, Arkansas, water years 1999–2008.
Constituent Concentrations, Loads, and Yields for White River, a Tributary to Beaver Lake, near Fayetteville 13

Table 4. Estimated total annual constituent load from constituent concentrations in water samples collected at water-quality stations for the White River near Fayetteville, Arkansas, water years 1999–2008, Richland Creek at Goshen, Arkansas, and War Eagle Creek near Hindsville, Arkansas, water years 2001–08.

Constituent 

(parameter 

code)

Total annual load per water year

(kilograms per year)

1999 2000 2001 2002 2003 2004 2005 2006 2007 2008

Mininimum Mean Maximum 

White River near Fayetteville (07048600)

Total ammonia 

+ organic nitrogen, as N (00625)

310,000 236,000 210,000 422,000 158,000 440,000 263,000 96,100 285,000 520,000 96,100 294,000 520,000

Dissolved nitrite 

+ nitrate, as N (00631)

284,000 219,000 191,000 394,000 145,000 414,000 241,000 87,400 263,000 489,000 87,400 273,000 489,000

Total nitrogen 

(00600) 612,000 477,000 412,000 860,000 312,000 906,000 521,000 188,000 570,000 1,070,000 188,000 593,000 1,070,000

Dissolved 

orthophosphorus, as P (00671)

9,000 8,400 5,930 15,800 4,700 18,300 7,960 2,680 9,250 20,800 2,680 10,300 20,800

Total phosphorus (00665) 61,800 59,700 40,700 114,000 32,500 134,000 55,000 18,400 64,900 151,000 18,300 73,200 151,000Dissolved organic carbon 

(00681)

1,540,000 1,100,000 1,060,000 1,940,000 788,000 1,980,000 1,290,000 492,000 1,370,000 2,330,000 492,000 1,390,000 2,330,000

Total organic carbon 

(00680)

2,150,000 1,590,000 1,470,000 2,830,000 1,100,000 2,930,000 1,810,000 674,000 1,950,000 3,460,000 674,000 2,000,000 3,460,000

Suspended 

sediment (80154)

58,300,000 55,800,000 38,400,000 106,000,000 30,600,000 125,000,000 51,800,000 17,400,000 60,800,000 141,000,000 17,400,000 68,500,000 141,000,000

Richland Creek at Goshen (07048800)

Total ammonia 

+ organic nitrogen, as N (00625)

61,900 32,400 27,700 61,700 22,400 76,800 46,500 17,500 39,700 176,000 17,500 56,300 176,000

Dissolved nitrite 

+ nitrate, as N (00631)

253,000 133,000 113,000 252,000 91,700 314,000 190,000 71,700 162,000 723,000 71,700 230,000 723,000

Total nitrogen 

(00600) 242,000 126,000 109,000 240,000 88,100 296,000 182,000 68,600 155,000 672,000 68,600 218,000 672,000

Dissolved 

orthophosphorus, as P (00671)

2,420 1,270 1,080 2,410 878 3,010 1,820 684 1,550 6,940 684 2,210 6,940

Total phosphorus (00665) 9,660 5,190 4,200 9,880 3,400 13,000 7,280 2,710 6,240 31,300 2,710 9,290 31,300
14 Constituent Concentrations, Loads, and Yields to Beaver Lake, Arkansas, Water Years 1999–2008 Constituent (parameter code) Total annual load per water year (kilograms per year) 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 Minini- mum Mean Maximum Dissolved or- ganic carbon (00681) 484,000 251,000 219,000 478,000 177,000 584,000 365,000 137,000 310,000 1,310,000 137,000 432,000 1,310,000 Total or- ganic carbon (00680) 586,000 306,000 263,000 583,000 213,000 721,000 441,000 166,000 376,000 1,650,000 166,000 530,000 1,650,000 Suspended sediment (80154) 10,200,000 5,460,000 4,430,000 10,400,000 3,580,000 13,700,000 7,610,000 2,850,000 6,570,000 32,900,000 2,850,000 9,770,000 32,900,000 War Eagle Creek near Hindsville (07049000) Total ammonia + organic nitrogen, as N (00625) 141,000 70,200 63,400 165,000 42,000 108,000 96,500 40,300 106,000 242,000 40,300 107,000 242,000 Dissolved nitrite + nitrate, as N (00631) 434,000 206,000 208,000 448,000 151,000 301,000 311,000 133,000 308,000 572,000 133,000 307,000 572,000 Total nitrogen (00600) 665,000 322,000 307,000 728,000 213,000 481,000 466,000 196,000 484,000 996,000 466,000 486,000 996,000 Dissolved orthophos- phorus, as P (00671) 15,000 7,290 6,880 16,700 4,730 11,000 10,500 4,380 11,000 23,100 4,380 11,000 23,100 Total phospho- rus (00665) 37,800 19,500 16,800 48,400 10,600 31,100 25,400 10,600 29,600 73,600 10,600 30,300 73,600 Dissolved or- ganic carbon (00681) 1,120,000 547,000 509,000 1,260,000 346,000 828,000 774,000 324,000 825,000 1,780,000 324,000 831,000 1,780,000 Total or- ganic carbon (00680) 1,380,000 688,000 622,000 1,620,000 412,000 1,060,000 946,000 395,000 1,040,000 2,370,000 395,000 959,000 2,370,000

Suspended 

sediment (80154)

33,500,000 18,400,000 14,600,000 47,300,000 8,620,000 31,500,000 21,800,000 9,250,000 28,400,000 80,800,000 8,620,000 29,400,000 80,800,000

Table 4. Estimated total annual constituent load from constituent concentrations in water samples collected at water-quality stations for the White River near Fayetteville, Arkansas, water years 1999–2008, Richland Creek at Goshen, Arkansas, and War Eagle Creek near Hindsville, Arkansas, water years 2001–08.—Continued
Constituent Concentrations, Loads, and Yields for White River, a Tributary to Beaver Lake, near Fayetteville 15

Table 5. Estimated mean annual constituent loads and yield estimated from constituent concentrations in water samples 

collected at water-quality stations for the White River near Fayetteville, Arkansas, water years 1999–2008, Richland Creek at 

Goshen, Arkansas, and War Eagle Creek near Hindsville, Arkansas, water years 2001–08.

[km2, square kilometer; kg/yr, kilograms per year; kg/yr/km2, kilogram per year per square kilometer; SEP, standard error of prediction]

Station name

(number)

Drainage

area

(km2)

Constituent

(parameter code)

Estimated mean annual

Total load1

 (+/- SEP) (kg/yr)

Total yield

 (kg/yr/km2)

White River near Fayetteville 

(07048600) 1,040 Total ammonia + organic nitrogen, as N (00625) 294,000 (219) 283

Dissolved nitrite + nitrate, as N (00631) 273,000 (124) 262

Total nitrogen (00600) 593,000 (155) 570

Dissolved orthophosphorus , as P (00671) 10,300 (16) 10

Total phosphorus (00665) 73,200 (99) 70

Dissolved organic carbon (00681) 1,390,000 (499) 1,340

Total organic carbon (00680) 2,000,000 (913) 1,920

Suspended sediment (80154) 68,500,000 (59,600) 65,900

Richland Creek at Goshen 

(07048800) 357 Total ammonia + organic nitrogen, as N (00625) 56,300 (63) 158

Dissolved nitrite + nitrate, as N (00631) 230,000 (301) 644

Total nitrogen (00600) 218,000 (120) 611

Dissolved orthophosphorus, as P (00671) 2,210 (4) 6

Total phosphorus (00665) 9,290 (24) 26

Dissolved organic carbon (00681) 432,000 (218) 1,210

Total organic carbon (00680) 530,000 (295) 1,480

Suspended sediment (80154) 9,770,000 (12,000) 27,400

War Eagle Creek near Hindsville 

(07049000) 681 Total ammonia + organic nitrogen, as N (00625) 107,000 (103) 157

Dissolved nitrite + nitrate, as N (00631) 307,000 (90) 451

Total nitrogen (00600) 486,000 (125) 714

Dissolved orthophosphorus , as P (00671) 11,000 (10) 16

Total phosphorus (00665) 30,300 (23) 44

Dissolved organic carbon (00681) 831,000 (385) 1,220

Total organic carbon (00680) 959,000 (514) 1,410

Suspended sediment (80154) 29,400,000 (36,800) 43,200

1

Calculated by S-LOADEST and are statistics of all data in the 10-year period.
16 Constituent Concentrations, Loads, and Yields to Beaver Lake, Arkansas, Water Years 1999–2008

Table 6. Estimated mean annual constituent loads, mean annual streamflows, and mean flow-weighted constituent 

concentrations at water-quality stations for the White River near Fayetteville, Arkansas, water years 1999–2008, 

Richland Creek at Goshen, Arkansas, and War Eagle Creek near Hindsville, Arkansas, water years 2001–08.

[kg/yr, kilogram per year; ft3/s, cubic foot per second; mg/L, milligram per liter; N, nitrogen; P, phosphorus]

Station name 

(number)

Constituent 

(parameter code)

Estimated mean annual

Load

 (kg/yr)

Flow-weighted

concentration

(mg/L)

White River near Fayetteville 

(07048600) Total ammonia + organic nitrogen, as N (00625) 294,000 0.61

Dissolved nitrite + nitrate, as N (00631) 273,000 0.57

Total nitrogen (00600) 593,000 1.23

Dissolved orthophosphorus, as P (00671) 10,300 0.02

Total phosphorus (00665) 73,200 0.15

Dissolved organic carbon (00681) 1,390,000 2.94

Total organic carbon (00680) 2,000,000 4.19

Suspended sediment (80154) 68,500,000 136

Richland Creek at Goshen 

(07048800) Total ammonia + organic nitrogen, as N (00625) 56,300 0.35

Dissolved nitrite + nitrate, as N (00631) 230,000 1.42

Total nitrogen (00600) 218,000 1.35

Dissolved orthophosphorus, as P (00671) 2,210 0.014

Total phosphorus (00665) 9,290 0.06

Dissolved organic carbon (00681) 432,000 2.69

Total organic carbon (00680) 530,000 3.28

Suspended sediment (80154) 9,770,000 58.4

War Eagle Creek near Hindsville 

(07049000) Total ammonia + organic nitrogen, as N (00625) 107,000 0.39

Dissolved nitrite + nitrate, as N (00631) 307,000 1.17

Total nitrogen (00600) 486,000 1.81

Dissolved orthophosphorus, as P (00671) 11,000 0.04

Total phosphorus (00665) 30,300 0.11

Dissolved organic carbon (00681) 831,000 3.07

Total organic carbon (00680) 959,000 3.84

Suspended sediment (80154) 29,400,000 102
Constituent Concentrations, Loads, and Yields for Richland Creek, a Tributary to Beaver Lake, at Goshen 17

and mean yield was 70 kg/yr/km2 (table 5). Estimated mean 

annual flow-weighted concentration was 0.15 mg/L (table 6).

Dissolved Organic Carbon

Dissolved organic carbon (DOC) concentrations for 

White River near Fayetteville ranged from 0.8 to 10.9 mg/L 

with a mean concentration of 2.8 mg/L (table 3). There was 

little relation between concentrations and streamflow (fig. 

3). Loads were estimated as a function of streamflow (R2 = 

0.94; table 2). These estimated loads were then compared 

to instantaneous measured load with a slope of 0.90 (fig. 4). 

For DOC, the 10-year mean load was 1,390,000 kg/yr (table 

4) and mean yield was 1,340 kg/yr/km2 (table 5). Estimated 

mean annual flow-weighted concentration was 2.94 mg/L 

(table 6).

Total Organic Carbon

Total organic carbon (TOC) concentrations for White 

River near Fayetteville ranged from 0.7 to 19.5 mg/L with a 

mean concentration of 3.6 mg/L (table 3). There was a slight 

relation between concentration and streamflow (fig. 3). Loads 

were estimated as a function of streamflow (R2 = 0.93; table 

2). These estimated loads were then compared to instantaneous measured load with a slope of 0.89 (fig. 4). For TOC, 

the 10-year mean load was 2,000,000 kg/yr (table 4) and mean 

yield was 1,920 kg/yr/km2 (table 5). Estimated mean annual 

flow-weighted concentration was 4.19 mg/L (table 6).

Suspended Sediment 

Suspended sediment concentrations for White River near 

Fayetteville ranged from 2 to 950 mg/L with a mean concentration of 97 mg/L (table 3). Concentrations tended to increase 

with an increase in streamflow (fig. 3). Loads were estimated 

as a function of streamflow (R2 = 0.94; table 2). These estimated loads were then compared to instantaneous measured 

load with a slope of 0.88 (fig. 4). For suspended sediment, 

the 10-year mean load was 68,500,000 kg/yr (table 4) and 

mean yield was 65,900 kg/yr/km2 (table 5). Estimated mean 

annual flow-weighted concentration was 136 mg/L (table 6).

Constituent Concentrations, Loads, and 

Yields for Richland Creek, a Tributary 

to Beaver Lake, at Goshen

Total Ammonia plus Organic Nitrogen

Total ammonia plus organic nitrogen concentrations 

for Richland Creek at Goshen ranged from less than 0.05 to 

1.6 mg/L as N with a mean concentration of 0.29 mg/L as N 

(table 3). Concentrations tended to increase with increasing 

streamflow (fig. 5). Loads were estimated as a function of 

streamflow (R2 = 0.97; table 2). These estimated loads were 

then compared to instantaneous measured load with a slope 

of 0.79 (fig. 6). For total ammonia plus organic nitrogen as 

N, the 10-year mean load was 56,300 kg/yr as N (table 4) and 

mean yield was 158 kg/yr/km2 as N (table 5). Estimated mean 

annual flow-weighted concentration was 0.35 mg/L as N (table 

6).

Dissolved Nitrite plus Nitrate Nitrogen

Dissolved nitrite plus nitrate concentrations for Richland 

Creek at Goshen ranged from 0.01 (estimated) to 3.9 mg/L 

as N with a mean concentration of 0.850 mg/L as N (table 3). 

Concentrations tended to increase with increasing streamflow 

(fig. 5). Loads were estimated as a function of streamflow (R2 

= 0.96; table 2). These estimated loads were then compared 

to instantaneous measured load with a slope of 0.68 (fig. 6). 

For dissolved nitrite plus nitrate, the 10-year mean load was 

230,000 kg/yr as N (table 4) and mean yield was 644 kg/yr/

km2 as N (table 5). Estimated mean annual flow-weighted 

concentration was 1.42 mg/L as N (table 6).

Total Nitrogen

Total nitrogen concentrations for Richland Creek at 

Goshen ranged from 0.20 to 4.1 mg/L with a mean concentration of 1.2 mg/L (table 3). Concentrations tended to increase 

with increasing streamflow (fig. 5). Loads were estimated as 

a function of streamflow (R2 = 0.99; table 2). These estimated 
18 Constituent Concentrations, Loads, and Yields to Beaver Lake, Arkansas, Water Years 1999–2008

INSTANTANEOUS STREAMFLOW, IN CUBIC METERS PER SECOND

0.001 0.01 0.1 1 10 100 1,000 10,000 0.001 0.01 0.1 1 10 100 1,000 10,000

0.01

0.1

1

10

0.001

0.01

0.1

1

CONCENTRATION, IN MILLIGRAMS PER LITER

0.1

1

10

100

0.1

1

10

100

0.001

0.01

0.1

1

10

100

0.001

0.01

0.1

1

0.1

1

10

100

0.001

0.01

0.1

1

10

100

TOTAL AMMONIA PLUS ORGANIC NITROGEN

AS NITROGEN

DISSOLVED NITRITE PLUS NITRATE NITROGEN 

DISSOLVED ORTHOPHOSPHORUS AS PHOSPHORUS 

TOTAL PHOSPHORUS

TOTAL NITROGEN

DISSOLVED ORGANIC CARBON

TOTAL ORGANIC CARBON SUSPENDED SEDIMENT

Regression line

95 percent confidence interval of the regression

95 percent confidence interval of the prediction

Censored sample value

Measured sample value

EXPLANATION

Figure 5. Relation between nutrient and sediment concentraitons and instantaneous streamflow for samples collected at Richland 

Creek at Goshen, Arkansas, water years 2001–08.
Constituent Concentrations, Loads, and Yields for White River, a Tributary to Beaver Lake, near Fayetteville 19

NATURAL LOG OF INSTANTANEOUS MEASURED LOAD,

IN KILOGRAMS PER DAY

0 2 4 6 8 10 12 14 16 18 20

-2 0 2 4 6 8 10 12 14 16

0 2 4 6 8 10 12 14 16

-8 -6 -4 -2 0 2 4 6 8 10

-6 -4 -2 0 2 4 6 8 10 12

-4 -2 0 2 4 6 8 10 12 14 -6 -4 -2 0 2 4 6 8 10 12 14

-4 -2 0 2 4 6 8 10 12 14

-4

-2

0

2

4

6

8

10

12

14

-8

-6

-4

-2

0

2

4

6

8

10

12

NATURAL LOG OF ESTIMATED LOAD, IN KILOGRAMS PER DAY

-4

-2

0

2

4

6

8

10

12

14

0

2

4

6

8

10

12

14

16

-6

-4

-2

0

2

4

6

8

10

12

14

-8

-6

-4

-2

0

2

4

6

8

10

-2

0

2

4

6

8

10

12

14

16

0

2

4

6

8

10

12

14

16

18

20

TOTAL AMMONIA PLUS

ORGANIC NITROGEN AS

NITROGEN

DISSOLVED NITRITE PLUS

NITRATE NITROGEN 

DISSOLVED ORTHOPHOSPHORUS

AS PHOSPHORUS 

TOTAL PHOSPHORUS

TOTAL NITROGEN

DISSOLVED ORGANIC CARBON

TOTAL ORGANIC CARBON SUSPENDED SEDIMENT

Regression line

95 percent confidence interval of the regression

95 percent confidence interval of the prediction

Sample value

EXPLANATION

Figure 6. Relation between natural log of instantaneous measured load and natural log of estimated load for samples collected at 

Richland Creek at Goshen, Arkansas, water years 2001–08.
20 Constituent Concentrations, Loads, and Yields to Beaver Lake, Arkansas, Water Years 1999–2008

loads were then compared to instantaneous measured load 

with a slope of 0.78 (fig. 6). For total nitrogen, the 10-year 

mean load was 218,000 kg/yr (table 4) and mean yield 

was 611 kg/yr/km2 (table 5). Estimated mean annual flowweighted concentration was 1.35 mg/L (table 6).

Dissolved Orthophosphorus 

Dissolved orthophosphorus concentrations for Richland 

Creek at Goshen ranged from less than 0.003 to 0.207 mg/L 

as P with a mean concentration of 0.017 mg/L as P (table 3). 

Concentrations tended to increase slightly with increasing 

streamflow (fig. 5). Loads were estimated as a function of 

streamflow (R2 = 0.94; table 2). These estimated loads were 

then compared to instantaneous measured load with a slope 

of 0.80 (fig. 6). For dissolved orthophosphorus, the 10-year 

mean load was 2,210 kg/yr as P (table 4) and mean yield was 

6 kg/yr/km2 as P (table 5). Estimated mean annual flowweighted concentration was 0.014 mg/L as P (table 6).

Total Phosphorus

Total phosphorus concentrations for Richland Creek 

at Goshen ranged from 0.007 to 0.440 mg/L with a mean 

concentration of 0.044 mg/L (table 3). Concentrations tended 

to increase with increasing streamflow (fig. 5). Loads were 

estimated as a function of streamflow (R2 = 0.94; table 2). 

These estimated loads were then compared to instantaneous 

measured load with a slope of 0.68 (fig. 6). For total phosphorus, the 10-year mean load was 9,290 kg/yr (table 4) and mean 

yield was 26 kg/yr/km2 (table 5). Estimated mean annual 

flow-weighted concentration was 0.06 mg/L (table 6).

Dissolved Organic Carbon

DOC concentrations for Richland Creek at Goshen 

ranged from 0.6 to 25.4 mg/L with a mean concentration 

of 2.56 mg/L (table 3). Concentrations tended to increase 

slightly with increases in stream streamflow (fig. 5). Loads 

were estimated as a function of streamflow (R2 = 0.99; table 

2). These estimated loads were then compared to instantaneous measured load with a slope of 0.81 (fig. 6). For DOC, 

the 10-year mean load was 432,000 kg/yr (table 4) and mean 

yield was 1,210 kg/yr/km2 (table 5). Estimated mean annual 

flow-weighted concentration was 2.69 mg/L (table 6).

Total Organic Carbon

TOC concentrations for Richland Creek at Goshen ranged 

from 0.7 to 19.5 mg/L with a mean concentration of 3.00 mg/L 

(table 3). Concentrations tended to increase with increasing 

stream streamflow (fig. 5). Loads were estimated as a function 

of streamflow (R2 = 0.99; table 2). These estimated loads were 

then compared to instantaneous measured load with a slope of 

0.77 (fig. 6). For TOC, the 10-year mean load was 530,000 

kg/yr (table 4) and mean yield was 1,480 kg/yr/km2 (table 5). 

Estimated mean annual flow-weighted concentration was 3.28 

mg/L (table 6).

Suspended Sediment 

Suspended sediment concentrations for Richland Creek at 

Goshen ranged from 1 to 1,050 mg/L with a mean concentration of 58 mg/L (table 3). Concentrations tended to increase 

with increasing streamflow (fig. 5). Loads were estimated as 

a function of streamflow (R2 = 0.97; table 2). These estimated 

loads were then compared to instantaneous measured load 

with a slope of 0.70 (fig. 6). For suspended sediment, the 

10-year mean load was 9,770,000 kg/yr (table 4) and mean 

yield was 27,400 kg/yr/km2 (table 5). Estimated mean annual 

flow-weighted concentration was 58.4 mg/L (table 6).

Constituent Concentrations, Loads, and 

Yields for War Eagle Creek, a Tributary 

to Beaver Lake, near Hindsville

Total Ammonia plus Organic Nitrogen 

Total ammonia plus organic nitrogen concentrations for 

War Eagle Creek near Hindsville ranged from less than 0.05 

to 2.3 mg/L as N with a mean concentration of 0.28 mg/L as 

N (table 3). Concentrations tended to increase with increasing streamflow (fig. 7). Loads were estimated as a function of 

streamflow (R2 = 0.82; table 2). These estimated loads were 

then compared to instantaneous measured load with a slope 

of 0.93 (fig. 8). For total ammonia plus organic nitrogen, 

the 10-year mean load was 107,000 kg/yr as N (table 4) and 

mean yield was 157 kg/yr/km2 as N (table 5). Estimated mean 

annual flow-weighted concentration was 0.39 mg/L as N (table 

6).

Dissolved Nitrite plus Nitrate Nitrogen 

Dissolved nitrite plus nitrate concentrations for War 

Eagle Creek near Hindsville ranged from 0.257 to 2.36 mg/L 

as N with a mean concentration of 1.16 mg/L as N (table 3). 

There was no relation between concentrations and changes 

in streamflow (fig. 7). Loads were estimated as a function of 

streamflow (R2 = 0.94; table 2). These estimated loads were 

then compared to instantaneous measured load with a slope of 

0.92 (fig. 8). For dissolved nitrate plus nitrite concentrations, 

the 10-year mean load was 307,000 kg/yr as N (table 4) and 

mean yield was 451 kg/yr/km2 as N (table 5). Estimated mean 

annual flow-weighted concentration was 1.17 mg/L as N (table 

6).
Constituent Concentrations, Loads, and Yields for War Eagle Creek, a Tributary to Beaver Lake, near Hindsville 21

INSTANTANEOUS STREAMFLOW, IN CUBIC METERS PER SECOND

0.1 1 10 100 1,000 10,000 0.1 1 10 100 1,000 10,000

0.01

0.1

1

10

0.001

0.01

0.1

1

CONCENTRATION, IN MILLIGRAMS PER LITER

0.1

1

10

0.1

1

10

100

0.1

1

10

0.001

0.01

0.1

1

0.1

1

10

100

0.1

1

10

100

1,000

10,000

TOTAL AMMONIA PLUS ORGANIC NITROGEN

AS NITROGEN

DISSOLVED NITRITE PLUS NITRATE NITROGEN 

DISSOLVED ORTHOPHOSPHORUS AS PHOSPHORUS 

TOTAL PHOSPHORUS

TOTAL NITROGEN

DISSOLVED ORGANIC CARBON

TOTAL ORGANIC CARBON SUSPENDED SEDIMENT

Regression line

95 percent confidence interval of the regression

95 percent confidence interval of the prediction

Censored sample value

Measured sample value

EXPLANATION

Figure 7. Relation between nutrient and sediment concentrations and instantaneous streamflow volume for samples collected at War 

Eagle Creek near Hindsville, Arkansas, water years 2001–08.
22 Constituent Concentrations, Loads, and Yields to Beaver Lake, Arkansas, Water Years 1999–2008

Figure 8. Relation between natural log of instantaneous measured load and natural log of estimated load for samples collected at War 

Eagle Creek near Hindsville, Arkansas, water years 2001–08.

NATURAL LOG OF INSTANTANEOUS MEASURED LOAD,

IN KILOGRAMS PER DAY

2 4 6 8 10 12 14 16 18 20 22

0 2 4 6 8 10 12 14 16

2 4 6 8 10 12 14 16 18

-8 -6 -4 -2 0 2 4 6 8 10 12

-4 -2 0 2 4 6 8 10 12 14

0 2 4 6 8 10 12 14

0 2 4 6 8 10 12 14

0 2 4 6 8 10 12 14

NATURAL LOG OF ESTIMATED LOAD, IN KILOGRAMS PER DAY

0

2

4

6

8

10

12

14

0

2

4

6

8

10

12

14

-8

-6

-4

-2

0

2

4

6

8

10

12

-4

-2

0

2

4

6

8

10

12

14

0

2

4

6

8

10

12

14

0

2

4

6

8

10

12

14

16

2

4

6

8

10

12

14

16

18

2

4

6

8

10

12

14

16

18

20

22

TOTAL AMMONIA PLUS

ORGANIC NITROGEN AS

NITROGEN

DISSOLVED NITRITE PLUS

NITRATE NITROGEN 

DISSOLVED ORTHOPHOSPHORUS

AS PHOSPHORUS 

TOTAL PHOSPHORUS

TOTAL NITROGEN

DISSOLVED ORGANIC CARBON

TOTAL ORGANIC CARBON SUSPENDED SEDIMENT

Regression line

95 percent confidence interval of the regression

95 percent confidence interval of the prediction

Sample value

EXPLANATION
Tributary Water-Quality Comparison 23

Total Nitrogen

Total nitrogen concentrations for War Eagle Creek near 

Hindsville ranged from 0.58 to 2.7 mg/L with a mean concentration of 1.5 mg/L (table 3). Concentrations tended to 

increase slightly with increasing streamflow (fig. 7). Loads 

were estimated as a function of streamflow (R2 = 0.98; table 

2). These estimated loads were then compared to instantaneous measured load with a slope of 0.94 (fig. 8). For total 

nitrogen, the 10-year mean load was 486,000 kg/yr (table 4) 

and mean yield was 714 kg/yr/km2 (table 5). Estimated mean 

annual flow-weighted concentration was 1.81 mg/L (table 6).

Dissolved Orthophosphorus 

Dissolved orthophosphorus concentrations for War Eagle 

Creek near Hindsville ranged from less than 0.003 to 0.19 

mg/L as P with a mean concentration of 0.029 mg/L as P (table 

3). Concentrations tended to increase slightly with increasing streamflow (fig. 7). Loads were estimated as a function of 

streamflow (R2 = 0.79; table 2). These estimated loads were 

then compared to instantaneous measured load with a slope 

of 0.94 (fig. 8). For dissolved orthophosphorus, the 10-year 

mean load was 11,000 kg/yr as P (table 4) and mean yield was 

16 kg/yr/km2 as P (table 5). Estimated mean annual flowweighted concentration was 0.04 mg/L as P (table 6). 

Total Phosphorus

Total phosphorus concentrations for War Eagle Creek 

near Hindsville ranged from 0.018 to 0.460 mg/L with a 

mean concentration of 0.064 mg/L (table 3). Concentrations 

tended to increase with increasing streamflow (fig. 7). Loads 

were estimated as a function of streamflow (R2 = 0.89; table 

2). These estimated loads were then compared to instantaneous measured load with a slope of 0.91 (fig. 8). For total 

phosphorus, the 10-year mean load was 30,300 kg/yr (table 4) 

and mean yield was 44 kg/yr/km2 (table 5). Estimated mean 

annual flow-weighted concentration was 0.11 mg/L (table 6).

Dissolved Organic Carbon

DOC concentrations for War Eagle Creek near Hindsville 

ranged from 0.7 to 29.8 mg/L with a mean concentration of 

2.6 mg/L (table 3). Concentrations tended to increase slightly 

with increases in streamflow (fig. 7). Loads were estimated as 

a function of streamflow (R2 = 0.92; table 2). These estimated 

loads were then compared to instantaneous measured load 

with a slope of 0.90 (fig. 8). For DOC, the 10-year mean load 

was 831,000 kg/yr (table 4) and mean yield was 1,220 kg/yr/

km2 (table 5). Estimated mean annual flow-weighted concentration was 3.07 mg/L (table 6).

Total Organic Carbon

TOC concentrations for War Eagle Creek near Hindsville 

ranged from 0.6 to 21.6 mg/L with a mean concentration of 2.8 

mg/L (table 3). Concentrations tended to increase with increasing streamflow (fig. 7). Loads were estimated as a function of 

streamflow (R2 = 0.93; table 2). These estimated loads were 

then compared to instantaneous measured load with a slope of 

0.88 (fig. 8). For TOC, the 10-year mean load was 959,000 

kg/yr (table 4) and mean yield was 1,410 kg/yr/km2 (table 5). 

Estimated mean annual flow-weighted concentration was 3.84 

mg/L (table 6).

Suspended Sediment 

Suspended sediment concentrations for War Eagle Creek 

near Hindsville ranged from less than 0.5 to 727 mg/L with 

a mean concentration of 50 mg/L (table 3). Concentrations 

tended to increase with increasing streamflow (fig. 7). Loads 

were estimated as a function of streamflow (R2 = 0.86; table 

2). These estimated loads were then compared to instantaneous measured load with a slope of 0.87 (fig. 8). For 

suspended sediment, the 10-year mean load was 29,400,000 

kg/yr (table 4) and mean yield was 43,200 kg/yr/km2 (table 5). 

Estimated mean annual flow-weighted concentration was 102 

mg/L (table 6).

Tributary Water-Quality Comparison

Constituent concentrations, loads, and yields varied with 

time among the three tributaries contributing to Beaver Lake. 

These variations can result from differences in precipitation, 

land use, contributions of nutrients from point sources, and 

variations in basin size. Overall, for the 10-year period, constituent loads followed streamflow trends resulting from yearly 

weather changes. Generally, during wetter years, increased 

runoff contributed to an increase in streamflow. Fluctuation 

in load values followed the annual streamflow patterns (figs. 

9–11). Load and yield estimates varied yearly during the 

study period, water years 1999–2008, with the least nutrient 

and sediment loads and yields generally occurring in water 

year 2006, and the greatest occurring in water year 2008, a 

year with extreme floods near Beaver Lake (Funkhouser and 

Eng, 2009). 

Annual Flow-Weighted Concentrations

Flow-weighted concentrations of most constituents 

were greater at the War Eagle Creek station than at the White 

River and Richland Creek stations. Of the three stations, 

flow-weighted concentrations of total nitrogen, dissolved 

orthophosphorus as P, DOC, and suspended sediment were 

greatest at the War Eagle Creek station (figs. 12 and 13). 
24 Constituent Concentrations, Loads, and Yields to Beaver Lake, Arkansas, Water Years 1999–2008

Figure 9. Time series of annual load and streamflow at White River near Fayetteville, Arkansas, water years 1999–2008.

2009

1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009

WATER YEAR

1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009

1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009

1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009

1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008

10,000

100,000

1,000,000

10,000,000

1,000

10,000

100,000

1,000,000

LOAD, IN KILOGRAMS PER YEAR

100,000

1,000,000

10,000,000

100,000

1,000,000

10,000,000

10,000

100,000

1,000,000

1,000

10,000

100,000

1,000,000

100,000

1,000,000

10,000,000

100,000,000 LOAD, IN THOUSAND KILOGRAMS PER YEAR

1,000

10,000

100,000

1,000,000

0

5

10

15

20

25

30

0

5

10

15

20

25

30

0

5

10

15

20

25

30

0

5

10

15

20

25

30

MEAN ANNUAL STREAMFLOW, IN CUBIC METERS PER SECOND

0

5

10

15

20

25

30

0

5

10

15

20

25

30

0

5

10

15

20

25

30

0

5

10

15

20

25

30

TOTAL AMMONIA PLUS ORGANIC NITROGEN

AS NITROGEN

DISSOLVED NITRITE PLUS NITRATE NITROGEN 

DISSOLVED ORTHOPHOSPHORUS AS PHOSPHORUS 

TOTAL PHOSPHORUS

TOTAL NITROGEN

DISSOLVED ORGANIC CARBON

TOTAL ORGANIC CARBON SUSPENDED SEDIMENT

Load with 95 percent confidence whiskers

Mean annual streamflow

EXPLANATION
Tributary Water-Quality Comparison 25

2009

1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009

WATER YEAR

1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009

1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009

1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009

1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 LOAD, IN THOUSAND KILOGRAMS PER YEAR

LOAD, IN KILOGRAMS PER YEAR

1,000

10,000

100,000

1,000,000

100

1,000

10,000

100,000

1,000,000

10,000

100,000

1,000,000

10,000,000

1,000

10,000

100,000

1,000,000

10,000,000

10,000

100,000

1,000,000

10,000,000

100

1,000

10,000

100,000

10,000

100,000

1,000,000

10,000,000

100 

1,000

10,000

100,000

1,000,000

MEAN ANNUAL STREAMFLOW, IN CUBIC METERS PER SECOND

0

2

4

6

8

10

12

14

16

0

2

4

6

8

10

12

14

16

0

2

4

6

8

10

12

14

16

0

2

4

6

8

10

12

14

16

0

2

4

6

8

10

12

14

16

0

2

4

6

8

10

12

14

16

0

2

4

6

8

10

12

14

16

0

2

4

6

8

10

12

14

16

TOTAL AMMONIA PLUS ORGANIC NITROGEN

AS NITROGEN

DISSOLVED NITRITE PLUS NITRATE NITROGEN 

DISSOLVED ORTHOPHOSPHORUS AS PHOSPHORUS 

TOTAL PHOSPHORUS

TOTAL NITROGEN

DISSOLVED ORGANIC CARBON

TOTAL ORGANIC CARBON SUSPENDED SEDIMENT

Load with 95 percent confidence whiskers

Mean annual streamflow

EXPLANATION

Figure 10. Time series of annual load and streamflow at Richland Creek at Goshen, Arkansas, water years 1999–2008.
26 Constituent Concentrations, Loads, and Yields to Beaver Lake, Arkansas, Water Years 1999–2008

Figure 11. Time series of annual load and streamflow at War Eagle Creek near Hindsville, Arkansas, water years 1999–2008.

2009

1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009

WATER YEAR

1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009

1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009

1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009

1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008

10,000

100,000

1,000,000

1,000

10,000

100,000

1,000,000

100,000

1,000,000

10,000,000

1,000

10,000

100,000

10,000

100,000

1,000,000

1,000

10,000

100,000

100,000

1,000,000

10,000,000

1,000

10,000

100,000

1,000,000

LOAD, IN THOUSAND KILOGRAMS PER YEAR

LOAD, IN KILOGRAMS PER YEAR

2

4

6

8

10

12

14

16

18

2

4

6

8

10

12

14

16

18

2

4

6

8

10

12

14

16

18

2

4

6

8

10

12

14

16

18

2

4

6

8

10

12

14

16

18

2

4

6

8

10

12

14

16

18

2

4

6

8

10

12

14

16

18

2

4

6

8

10

12

14

16

18

MEAN ANNUAL STREAMFLOW, IN CUBIC METERS PER SECOND

TOTAL AMMONIA PLUS ORGANIC NITROGEN

AS NITROGEN

DISSOLVED NITRITE PLUS NITRATE NITROGEN 

DISSOLVED ORTHOPHOSPHORUS AS PHOSPHORUS 

TOTAL PHOSPHORUS

TOTAL NITROGEN

DISSOLVED ORGANIC CARBON

TOTAL ORGANIC CARBON SUSPENDED SEDIMENT

Load with 95 percent confidence whiskers

Mean annual streamflow

EXPLANATION
Tributary Water-Quality Comparison 27

Figure 12. Time series of annual flow-weighted concentrations for nutrients, organic carbon, and sediment at White River near 

Fayetteville, Richland Creek at Goshen, and War Eagle Creek near Hindsville, Arkansas, water years 1999–2008.

WATER YEAR

2009

1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009

1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009

1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009

1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009

1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008

FLOW-WEIGHTED CONCENTRATION, IN MILLIGRAMS PER LITER

0

0.2

0.4

0.6

0.8

1.0

0

0.05

0.10

0.15

0.20

0.25

0

0.5

1.0

1.5

2.0

2.5

3.0

3.0

3.2

3.4

3.6

3.8

4.0

4.2

4.4

4.6

4.8

5.0

0

0.5

1.0

1.5

2.0

2.5

3.0

0

0.02

0.04

0.06

0.08

2.0

2.5

3.0

3.5

4.0

40

60

80

100

120

140

160

180

200

TOTAL AMMONIA PLUS ORGANIC NITROGEN

AS NITROGEN

DISSOLVED NITRITE PLUS NITRATE NITROGEN 

DISSOLVED ORTHOPHOSPHORUS AS PHOSPHORUS 

TOTAL PHOSPHORUS

TOTAL NITROGEN

DISSOLVED ORGANIC CARBON

TOTAL ORGANIC CARBON SUSPENDED SEDIMENT

White River near Fayetteville, Arkansas

Richland Creek at Goshen, Arkansas

War Eagle Creek near Hindsville, Arkansas

EXPLANATION
28 Constituent Concentrations, Loads, and Yields to Beaver Lake, Arkansas, Water Years 1999–2008

Figure 13. Distributions of annual nutrient, organic carbon, and sediment flow-weighted concentrations from water samples collected 

at White River near Fayetteville, Richland Creek at Goshen, and War Eagle Creek near Hindsville, Arkansas, water years 1999–2008.

RICHLAND

CREEK AT

GOSHEN,

ARKANSAS

WAR EAGLE

CREEK NEAR

HINDSVILLE,

ARKANSAS

WHITE RIVER

NEAR

FAYETTEVILLE,

ARKANSAS

RICHLAND

CREEK AT

GOSHEN,

ARKANSAS

WAR EAGLE

CREEK NEAR

HINDSVILLE,

ARKANSAS

WHITE RIVER

NEAR

FAYETTEVILLE,

ARKANSAS

0.30

0.35

0.40

0.45

0.50

0.55

0.60

0.65

0.70

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0.04

0.06

0.08

0.10

0.12

0.14

0.16

0.18

0.20

0.22

0.01

0.02

0.03

0.04

0.05

0.06

FLOW-WEIGHTED CONCENTRATION, IN MILLIGRAMS PER LITER

1.0

1.2

1.4

1.6

1.8

2.0

2.2

2.4

2.6

2.8

3.0

3.2

3.4

3.6

3.8

3.0

3.5

4.0

4.5

5.0

40

60

80

100

120

140

160

180

200

TOTAL AMMONIA PLUS ORGANIC NITROGEN

AS NITROGEN

DISSOLVED NITRITE PLUS NITRATE NITROGEN 

DISSOLVED ORTHOPHOSPHORUS AS PHOSPHORUS 

TOTAL PHOSPHORUS

TOTAL NITROGEN

DISSOLVED ORGANIC CARBON

TOTAL ORGANIC CARBON SUSPENDED SEDIMENT

EXPLANATION

Value above the 90th percentile

90th percentile

75th percentile

50th percentile

25th percentile

10th percentile

Value below the 10th percentile
Summary 29

Flow-weighted concentrations of total ammonia plus organic 

nitrogen, total phosphorus, and TOC were greatest at the 

White River station. Flow-weighted concentrations of dissolved nitrite plus nitrate were greatest at the Richland Creek 

station. 

Annual Loads

Loads of most constituents were greatest at the War 

Eagle Creek and White River stations (fig. 14, table 4). Load 

amounts do not represent the contribution of the constituent 

for the entire basin but only that part upstream from the station 

where the samples were collected. Of the three stations, loads 

of dissolved nitrite plus nitrate and dissolved orthophosphorus 

were greatest at the War Eagle Creek station. Loads of total 

ammonia plus organic nitrogen, total nitrogen, total phosphorus, DOC, TOC, and suspended sediment were greatest at the 

White River station. Loads were least for all constituents at 

the Richland Creek station. 

Annual Yields

Yields of most constituents were greatest at the War 

Eagle Creek and White River stations (fig. 15, table 5). Yield 

amounts do not represent the contribution of the constituent 

for the entire basin but only that part upstream from the station 

where the samples were collected. Of the three stations, yields 

of total nitrogen and dissolved orthophosphorus were greatest 

at the War Eagle Creek station. Yields of total ammonia plus 

organic nitrogen, total phosphorus, DOC, TOC, and suspended 

sediment were greatest at the White River station. Yields at 

Richland Creek were least for all constituents except dissolved 

nitrite plus nitrate, which were greatest at Richland Creek.

Summary

Beaver Lake is a large, deep-storage reservoir used as 

the primary drinking-water supply for northwestern Arkansas 

and a primary watershed of concern for the State of Arkansas. 

Because of increased population growth and varying land 

use, information is needed to assess water quality, especially 

nutrient enrichment and sediment issues within the reservoir 

system. In 1999, streamflow-gaging stations at White River 

near Fayetteville (USGS station 07048600) and War Eagle 

Creek near Hindsville (USGS station 07049000) were converted from partial-record stations (supported by the USACE) 

to continuous-record stations, and a new streamflow-gaging 

station was established on Richland Creek at Goshen (USGS 

station 07048800), in cooperation with Beaver Water District. 

Also, periodic water-quality samples were collected at the 

White River near Fayetteville station in cooperation with 

Arkansas Soil and Water Conservation Commission, now 

Arkansas Natural Resources Commission. In 2001, USGS in 

cooperation with Beaver Water District modified the White 

River near Fayetteville water-quality sampling and initiated 

water-quality sampling at both the Richland Creek and War 

Eagle Creek stations. Water-quality sampling has continued 

at all three stations to present. Water-quality samples collected 

during the study period represented different flow conditions 

(from low to high). 

This report describes constituent loads, yields, and 

flow-weighted concentrations to Beaver Lake for White 

River, Richland Creek, and War Eagle Creek for the period 

1999–2008 water years. Constituents include total ammonia 

plus organic nitrogen, dissolved nitrite plus nitrate nitrogen, 

total nitrogen, dissolved orthophosphorus (soluble reactive 

phosphorus), total phosphorus, dissolved organic carbon, total 

organic carbon, and suspended sediment.

The Beaver Lake study area comprises the lake with three 

main tributaries: White River, Richland Creek, and War Eagle 

Creek. Several smaller tributaries also flow into the reservoir. 

The basin has a drainage area of 2,968 km2 upstream from 

Beaver Lake Dam. The White River is the largest tributary 

followed by War Eagle Creek and Richland Creek. Combined, 

these three tributaries represent approximately 69 percent of 

the total drainage area of Beaver Lake (measured upstream 

from the measured streamflow-gaging stations).

Estimated mean annual constituent loads and standard 

deviations of the mean loads were calculated by S-LOADEST 

using all available data for each constituent for the 10-year 

period. Constituent yields for each of the three stations were 

calculated by dividing mean annual constituent load by the 

drainage area, in square kilometers. Flow-weighted concentrations for each of the three stations were calculated by dividing mean annual constituent loads by mean annual streamflow 

and multiplying by a conversion factor to adjust the units.

Constituent concentrations, loads, and yields varied with 

time and varied among the three tributaries contributing to 

Beaver Lake. These variations can result from differences in 

precipitation, land use, contributions of nutrients from point 

sources, and variations in basin size. Load and yield estimates 

varied yearly during the study period, water years 1999–2008, 

with the least nutrient and sediment load and yields generally 

occurring in water year 2006, and the greatest occurring in 

water year 2008, during a year with record amounts of precipitation. Flow-weighted concentrations of most constituents 

were greatest at the War Eagle Creek station than at the White 

River and Richland Creek stations. Loads and yields of most 

constituents were greatest at the War Eagle Creek and White 

River stations than at the Richland Creek station. 
30 Constituent Concentrations, Loads, and Yields to Beaver Lake, Arkansas, Water Years 1999–2008

Figure 14. Distributions of annual nutrient, organic carbon, and sediment loads from water samples collected at White River near 

Fayetteville, Richland Creek at Goshen, and War Eagle Creek near Hindsville, Arkansas, water years 1999–2008.

RICHLAND

CREEK AT

GOSHEN,

ARKANSAS

WAR EAGLE

CREEK NEAR

HINDSVILLE,

ARKANSAS

WHITE RIVER

NEAR

FAYETTEVILLE,

ARKANSAS

RICHLAND

CREEK AT

GOSHEN,

ARKANSAS

WAR EAGLE

CREEK NEAR

HINDSVILLE,

ARKANSAS

WHITE RIVER

NEAR

FAYETTEVILLE,

ARKANSAS

ANNUAL LOAD, IN KILOGRAMS PER YEAR

100,000

200,000

300,000

400,000

500,000

600,000

0

20,000

40,000

60,000

80,000

100,000

120,000

140,000

160,000

0

20,000

40,000

60,000

80,000

100,000

120,000

0

2,000,000

4,000,000

6,000,000

8,000,000

100,000

200,000

300,000

400,000

500,000

600,000

700,000

800,000

5,000

10,000

15,000

20,000

25,000

30,000

500,000

1,000,000

1,500,000

2,000,000

2,500,000 LOAD, IN MILLION KILOGRAMS PER YEAR

0

20

40

60

80

100

120

140

160

0

TOTAL AMMONIA PLUS ORGANIC NITROGEN

AS NITROGEN

DISSOLVED NITRITE PLUS NITRATE NITROGEN 

DISSOLVED ORTHOPHOSPHORUS AS PHOSPHORUS 

TOTAL PHOSPHORUS

TOTAL NITROGEN

DISSOLVED ORGANIC CARBON

TOTAL ORGANIC CARBON SUSPENDED SEDIMENT

EXPLANATION

Value above the 90th percentile

90th percentile

75th percentile

50th percentile

25th percentile

10th percentile

Value below the 10th percentile
Summary 31

Figure 15. Distributions of annual nutrient, organic carbon, and sediment yields from water samples collected at White River near 

Fayetteville, Richland Creek at Goshen, and War Eagle Creek near Hindsville, Arkansas, water years 1999–2008.

RICHLAND

CREEK AT

GOSHEN,

ARKANSAS

WAR EAGLE

CREEK NEAR

HINDSVILLE,

ARKANSAS

WHITE RIVER

NEAR

FAYETTEVILLE,

ARKANSAS

RICHLAND

CREEK AT

GOSHEN,

ARKANSAS

WAR EAGLE

CREEK NEAR

HINDSVILLE,

ARKANSAS

WHITE RIVER

NEAR

FAYETTEVILLE,

ARKANSAS

0

100

200

300

400

500

600

YIELD, IN KILOGRAMS PER SQUARE KILOMETER PER YEAR

0

500

1,000

1,500

2,000

0

2,000

4,000

6,000

8,000

10,000

12,000

0

20

40

60

80

100

120

140

160

0

500

1,000

1,500

2,000

2,500

0

5

10

15

20

25

30

35

40

0

1,000

2,000

3,000

4,000

0

20,000

40,000

60,000

80,000

100,000

120,000

140,000

160,000

TOTAL AMMONIA PLUS ORGANIC NITROGEN

AS NITROGEN

DISSOLVED NITRITE PLUS NITRATE NITROGEN 

DISSOLVED ORTHOPHOSPHORUS AS PHOSPHORUS 

TOTAL PHOSPHORUS

TOTAL NITROGEN

DISSOLVED ORGANIC CARBON

TOTAL ORGANIC CARBON SUSPENDED SEDIMENT

EXPLANATION

Value above the 90th percentile

90th percentile

75th percentile

50th percentile

25th percentile

10th percentile

Value below the 10th percentile
32 Constituent Concentrations, Loads, and Yields to Beaver Lake, Arkansas, Water Years 1999–2008

Selected References

Brenton, R.W., and Arnett, T.L., 1993, Methods of analysis by 

the U.S. Geological Survey National Water Quality Laboratory; determination of dissolved organic carbon by UV-promoted persulfate oxidation and infrared spectrometry: U.S. 

Geological Survey Open-File Report 92–480, 12 p.

Childress, C.J.O., Foreman, W.T., Connor, B.F., and Maloney, T.J., 1999, New reporting procedures based on longterm method detection levels and some considerations for 

interpretations of water-quality data provided by the U.S. 

Geological Survey National Water Quality Laboratory: U.S. 

Geological Survey Open-File Report 99–193, 19 p.

Cohn, T.A., 1988, Adjusted maximum likelihood estimation of 

the moments of lognormal populations from type 1 censored 

samples: U.S. Geological Survey Open-File Report 88–350, 

34 p.

Cohn, T.A., DeLong, L.L., Gilroy, E.J., Hirsch, R.M., and 

Wells, D.K., 1989, Estimating constituent loads: Water 

Resources Research, v. 2, no. 5, p. 937–942.

Cohn, T.A., Gilroy, E.J., and Baier, W.G., 1992, Estimating 

fluvial transport of trace constituents using a regression 

model with data subject to censoring: Proceedings of the 

Joint Statistical Meeting, Boston, Mass., August 9–13, 

1992, p. 142–151.

Crawford, C.G., 1991, Estimation of suspended-sediment rating curves and mean suspended-sediment loads: Journal of 

Hydrology, v. 129, p. 331–348.

Dempster, A.P., Laird, N.M., and Rubin, D.B., 1977, Maximum likelihood from incomplete data via the EM algorithm: Journal of the Royal Statistical Society, Series B, v. 

39, no. 1, p. 1–38.

Edwards, T.K., and Glysson, G.D., 1999, Field methods for 

measurement of fluvial sediment: U.S. Geological Survey 

Techniques of Water-Resources Investigations, book 3, 

chap. C2, 89 p.

Fishman, M.J., ed., 1993, Field methods of analysis by the 

U.S. Geological Survey National Water Quality Laboratory; 

determination of inorganic and organic constituents in water 

and fluvial sediments: U.S. Geological Survey Open-File 

Report 93–125, 217 p.

Funkhouser, J.E., and Eng, Ken, 2009, Floods of selected 

streams in Arkansas, spring 2008: U.S. Geological Survey 

Fact Sheet 2008–3103, 4 p.

Galloway, J.M., and Green, W.R., 2006a, Analysis of ambient conditions and simulation of hydrodynamics and 

water-quality characteristics in Beaver Lake, Arkansas, 

2001 through 2003: U.S. Geological Survey Scientific 

Investiga¬tions Report 2006–5003, 55 p.

Galloway, J.M., Green, W.R., 2006b, Application of a twodimensional reservoir water-quality model of Beaver Lake, 

Arkansas, for the evaluation of simulated changes in input 

water quality, 2001–2003: U.S. Geological Survey Scientific Investigations Report 2006–5302, 39 p.

Gilroy, E.J., Hirsch, R.M., and Cohn, T.A., 1990, Mean square 

error of regression-based constituent transport estimates: 

Water Resources Research, v. 26, no. 9, p. 2,069–2,077.

Guy, H.P., 1969, Laboratory theory and methods for sediment 

analysis: U.S. Geological Survey Techniques of WaterResources Investigations, book 5, chap. C1, 58 p.

Haggard, B.E., and Green, W.R., 2002, Simulation of hydrodynamics, temperature, and dissolved oxygen in Beaver 

Lake, Arkansas, 1994–1995: U.S. Geological Survey WaterResources Investigations Report 02–4116, 21 p.

Helsel, D.R., and Hirsch, R. M., 2002, Statistical methods 

in water resources: U.S. Geological Survey Techniques of 

Water-Resources Investigations, book 4, chap. A3, 522 p.

Likes, Jiri, 1980, Variance of the MVUE for lognormal variance: Technometrics, v. 22, no. 2, p. 253–258.

Rantz, S.E., and others, 1982, Measurement and computation of streamflow – Volume 2. Computation of discharge: 

U.S. Geological Survey Water-Supply Paper 2175, v. 2, p. 

285–631.

Runkel, R.L., Crawford, C.G., and Cohn, T.A., 2004, Load 

estimator (LOADEST)—A FORTRAN program for 

estimating constituent loads in streams and rivers: U.S. 

Geological Survey Techniques and Methods, book 4, chap. 

A5, accessed August 2009 at

http://pubs.er.usgs.gov/usgspubs/tm/tm4A5

TIBCO Software Inc., 2008, TIBCO Spotfire S+ 8.1 for Windows.

Timme, P.J., 1995, National Water Quality Laboratory 1995 

Services Catalog: U.S. Geological Survey Open-File Report 

95–352, p. 92.

U.S. Army Corps of Engineers, 1997, Hydrologic engineering 

requirements for reservoirs: U.S. Army Corps of Engineers 

Engineering Manual 1110–2–1420, variously paginated.
Selected References 33

U.S. Census Bureau, 2009, 1999 and 2000 census of popula-

tion and housing, population finder, summary tables, gener-

ated by Susan Bolyard using American FactFinder,

http://factfinder.census.gov, accessed December 14, 2009.

U.S. Environmental Protection Agency, 1997, Guidelines 

establishing test procedures for the analysis of pollutants 

(App. B, Part 136, Definition and procedures for the deter-

mination of the method detection limit): U.S. Code of Fed-

eral Regulations, Title 40, revised July 1, 1997, p. 265–267.

U.S. Geological Survey, variously dated, National field man-

ual for the collection of water-quality data: U.S. Geological 

Survey Techniques of Water-Resources Investigations, book 

9, chaps. A1–A9, available online at http://pubs.water.usgs.

gov/twri9A.

U.S. Geological Survey, 2009, National Water Information 

System, accessed August 10, 2009, at http://pubs.er.usgs.

gov/usgspubs/tm/tm4A5.

Wershaw, R.L., Fishman, M.J., Grabbe, R.R., and Lowe, 

L.E., eds., 1987, Methods for the determination of organic 

substances in water and fluvial sediments: U.S. Geological 

Survey Techniques of Water-Resources Investigations, book 

5, chap. A3, 80 p.

Wilde, F.D., and Radke, D.B., 1998, Field measurements: U.S. 

Geological Survey Techniques of Water-Resources Investi-

gations, book 9, chap. A6, variously paginated.

Wilde, F.D., Radke, D.B., Gibs, J., Iwatsubo, R.T., 1998, 

Cleaning of equipment for water sampling: U.S. Geological 

Survey Techniques of Water-Resources Investigations, book 

9, chap. A3, variously paginated.

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estimation in a linear model with confined and censored 

data: Applied Statistics, v. 28, p. 195–206.
34 Constituent Concentrations, Loads, and Yields to Beaver Lake, Arkansas, Water Years 1999–2008

Appendix 1. Water-quality data results modified from NWIS data for White River near Fayetteville (07048600), Richland Creek at Goshen 

(07048800), and War Eagle Creek near Hindsville (07049000).—Continued

[Units are in milligrams per liter unless otherwise noted; m3/s, cubic meter per second; five-digit numbers in parentheses are STORET parameter 

codes used for computer storage of data; N, nitrogen; p, phosphorus; <, less than; --, missing data. When laboratory reporting limit (LRL) values 

were originally reported, less than values were modified by dividing the LRL by 2 to get the long-term method detection level (LT–MDL) and 

the resulting LT–MDL value is reported below]

Date Time

Instantaneous 

streamflow,

in m3/s

 (30209)

Total 

ammonia 

+ organic, 

as N 

(00625)

Dissolved

nitrite + 

nitrate,

as N 

(00631)

Total 

nitrogen 

(00600)

Dissolved 

orthophosphorus, as P 

(00671)

Total

phosphorus

(00665)

Dissolved 

organic 

carbon 

(00681)

Total 

organic 

carbon 

(00680)

Suspended 

sediment 

(80154)

11/04/1999 1200 0.311 0.31 0.36 0.67 0.010 0.030 --- --- 39

12/09/1999 1330 5.32 0.33 0.86 1.2 <0.010 0.050 --- --- 36

12/12/1999 1715 180 0.64 1.2 1.8 <0.010 0.130 --- --- 167

02/09/2000 945 2.44 <0.10 0.80 --- <0.010 <0.010 --- --- 32

04/13/2000 1200 17.6 0.38 0.46 0.84 <0.010 0.030 --- --- 43

05/07/2000 1700 28.9 0.42 0.29 0.71 <0.010 0.050 --- --- 56

05/25/2000 1010 9.77 0.33 0.21 0.54 <0.010 0.060 --- --- 63

05/26/2000 840 3.17 0.33 0.23 0.56 <0.010 0.050 --- --- 39

05/27/2000 1500 512 2.6 0.43 3.0 0.010 0.600 --- --- 738

06/14/2000 1900 69.7 0.92 0.42 1.3 0.050 0.200 --- --- 206

06/14/2000 2240 90.0 0.91 0.41 1.3 0.020 0.140 --- --- 189

06/17/2000 1315 408 1.9 0.40 2.3 0.110 0.420 --- --- 421

06/17/2000 1745 583 2.0 0.40 2.4 0.100 0.520 --- --- 542

06/18/2000 1140 143 0.62 0.58 1.2 0.030 0.140 --- --- 111

08/08/2000 1030 0.538 0.36 0.16 0.52 0.010 0.030 --- --- 36

10/12/2000 1330 0.963 0.32 0.26 0.58 <0.005 <0.010 --- --- 57

01/08/2001 1100 14.2 <0.10 1.4 --- <0.005 0.030 --- --- 28

02/14/2001 1930 100 1.8 0.88 2.7 0.020 0.390 --- --- 712

02/15/2001 1315 317 1.1 1.0 2.1 <0.005 0.220 --- --- 280

02/17/2001 715 119 0.38 1.3 1.7 0.010 0.030 --- --- 50

03/13/2001 930 9.06 0.28 1.3 1.6 <0.005 <0.010 --- --- 29

04/04/2001 1115 4.33 <0.10 0.73 --- <0.005 <0.010 1.6 2.1 28

04/17/2001 845 10.3 0.27 0.45 0.72 <0.005 0.020 1.6 1.8 24

05/01/2001 1130 3.17 0.29 0.23 0.52 <0.005 <0.010 0.8 1.1 25

05/15/2001 1330 3.74 0.47 0.24 0.71 <0.005 0.020 1.9 1.5 24

05/16/2001 1400 3.00 0.30 0.21 0.51 <0.005 <0.010 --- --- 38

05/30/2001 1400 16.2 0.55 0.32 0.87 <0.005 0.050 2.9 2.6 72

05/30/2001 1430 16.7 0.59 0.32 0.91 <0.005 <0.010 --- --- 72

06/12/2001 1315 1.61 0.29 0.12 0.41 0.020 0.020 2.6 2.7 20

06/15/2001 1015 31.7 0.69 0.18 0.87 0.010 0.090 --- --- 70

06/26/2001 815 0.934 0.42 0.20 0.62 <0.005 0.030 3.3 2.4 32

07/09/2001 1345 0.736 0.50 0.18 0.68 <0.005 <0.010 4.3 3.1 31

07/13/2001 1400 24.5 0.70 0.09 0.79 <0.005 0.060 --- --- 64

07/18/2001 900 6.00 0.83 0.43 1.3 0.010 0.130 --- --- 127

07/23/2001 1100 1.08 0.49 0.24 0.73 <0.005 0.030 2.9 2.4 33

08/06/2001 1415 0.340 0.30 0.15 0.45 <0.005 <0.010 3.2 2.4 33
Appendix 35

Appendix 1. Water-quality data results modified from NWIS data for White River near Fayetteville (07048600), Richland Creek at Goshen 

(07048800), and War Eagle Creek near Hindsville (07049000).—Continued

[Units are in milligrams per liter unless otherwise noted; m3/s, cubic meter per second; five-digit numbers in parentheses are STORET parameter 

codes used for computer storage of data; N, nitrogen; p, phosphorus; <, less than; --, missing data. When laboratory reporting limit (LRL) values 

were originally reported, less than values were modified by dividing the LRL by 2 to get the long-term method detection level (LT–MDL) and 

the resulting LT–MDL value is reported below]

Date Time

Instantaneous 

streamflow,

in m3/s

 (30209)

Total 

ammonia 

+ organic, 

as N 

(00625)

Dissolved

nitrite + 

nitrate,

as N 

(00631)

Total 

nitrogen 

(00600)

Dissolved 

orthophosphorus, as P 

(00671)

Total

phosphorus

(00665)

Dissolved 

organic 

carbon 

(00681)

Total 

organic 

carbon 

(00680)

Suspended 

sediment 

(80154)

08/21/2001 1330 0.425 0.50 0.40 0.90 <0.005 0.030 3.8 3.9 33

09/04/2001 1100 0.453 0.60 0.31 0.91 <0.005 <0.010 --- --- 28

09/05/2001 1215 0.368 0.50 0.28 0.78 <0.005 <0.010 4.3 3.8 22

09/17/2001 1230 9.26 1.1 0.41 1.5 0.050 0.220 4.6 3.9 148

10/01/2001 1250 0.765 0.30 0.44 0.74 <0.005 <0.010 3.6 3.6 32

10/10/2001 2320 151 <0.10 0.33 --- 0.020 0.580 --- --- 950

10/11/2001 355 120 <0.10 0.50 --- 0.080 0.180 --- --- 276

10/11/2001 1530 67.7 <0.10 0.29 --- 0.040 0.230 --- --- 99

10/15/2001 1400 17.8 <0.10 0.96 --- 0.040 0.070 4.3 4.9 37

10/24/2001 1100 2.75 0.20 0.97 1.2 <0.005 0.020 --- --- 37

10/29/2001 1315 1.44 0.30 0.78 1.1 <0.005 <0.010 2.5 2.7 23

11/07/2001 1530 4.98 0.40 1.0 1.4 0.010 <0.010 4.2 5.6 55

11/26/2001 1345 6.43 <0.10 0.32 --- <0.005 <0.010 2.9 4.3 26

12/04/2001 1030 13.7 <0.10 0.57 --- <0.005 0.030 --- --- 38

12/10/2001 1400 7.99 <0.10 0.59 --- 0.010 0.030 1.3 1.4 24

12/17/2001 415 816 1.6 0.57 2.2 <0.005 0.420 6.8 7.0 462

12/17/2001 745 699 1.3 0.58 1.9 0.030 0.310 --- --- 349

12/17/2001 1745 239 0.60 0.78 1.4 0.020 0.140 --- --- 130

01/03/2002 915 6.00 <0.10 1.2 --- <0.005 <0.010 3.8 4.0 25

01/14/2002 1230 3.11 <0.10 1.0 --- <0.005 <0.010 1.5 1.8 16

01/31/2002 1245 266 1.3 0.62 1.9 0.050 0.240 --- --- 306

02/06/2002 1215 22.0 <0.10 0.93 --- <0.005 <0.010 1.7 1.9 19

02/20/2002 1145 40.5 0.70 0.64 1.3 0.020 0.070 3.6 4.1 63

03/05/2002 1400 16.2 <0.10 0.57 --- 0.030 <0.010 1.8 2.2 21

03/07/2002 1000 16.5 <0.10 0.51 --- <0.005 <0.010 --- --- 23

03/19/2002 745 221 0.80 0.45 1.2 0.050 0.180 5.2 5.1 179

04/02/2002 1630 17.9 <0.10 0.58 --- <0.005 <0.010 0.8 --- 23

04/07/2002 2030 209 1.0 0.48 1.5 0.020 0.200 --- --- 373

04/16/2002 1315 16.9 <0.10 0.58 --- <0.005 <0.010 1.0 1.0 29

04/30/2002 1400 14.8 <0.10 0.30 --- <0.005 0.020 1.0 1.5 30

05/13/2002 1745 13.8 0.60 0.27 0.87 <0.005 0.040 2.6 2.8 40

05/15/2002 1430 6.82 0.50 0.03 0.80 <0.005 0.050 --- --- 29

05/17/2002 1300 76.2 1.3 0.25 1.6 0.030 0.120 --- --- 206

05/29/2002 915 7.48 0.20 0.22 0.42 0.010 <0.010 1.9 1.6 26

06/17/2002 1815 8.78 0.40 0.17 0.57 0.020 0.040 2.6 2.3 14

07/08/2002 1115 0.991 0.30 0.15 0.45 0.020 0.040 2.2 2.1 11
36 Constituent Concentrations, Loads, and Yields to Beaver Lake, Arkansas, Water Years 1999–2008

Appendix 1. Water-quality data results modified from NWIS data for White River near Fayetteville (07048600), Richland Creek at Goshen 

(07048800), and War Eagle Creek near Hindsville (07049000).—Continued

[Units are in milligrams per liter unless otherwise noted; m3/s, cubic meter per second; five-digit numbers in parentheses are STORET parameter 

codes used for computer storage of data; N, nitrogen; p, phosphorus; <, less than; --, missing data. When laboratory reporting limit (LRL) values 

were originally reported, less than values were modified by dividing the LRL by 2 to get the long-term method detection level (LT–MDL) and 

the resulting LT–MDL value is reported below]

Date Time

Instantaneous 

streamflow,

in m3/s

 (30209)

Total 

ammonia 

+ organic, 

as N 

(00625)

Dissolved

nitrite + 

nitrate,

as N 

(00631)

Total 

nitrogen 

(00600)

Dissolved 

orthophosphorus, as P 

(00671)

Total

phosphorus

(00665)

Dissolved 

organic 

carbon 

(00681)

Total 

organic 

carbon 

(00680)

Suspended 

sediment 

(80154)

07/22/2002 1600 3.88 0.40 0.14 0.54 <0.005 0.040 2.8 2.8 22

07/25/2002 800 6.82 <0.10 0.05 --- <0.005 0.030 --- --- 15

08/21/2002 1450 3.00 0.20 0.35 0.55 <0.005 0.040 2.4 2.1 23

08/28/2002 1300 0.934 0.40 0.17 0.57 <0.005 0.020 --- --- 8

09/03/2002 1430 0.481 0.40 0.11 0.51 <0.005 <0.010 2.2 1.9 9

10/08/2002 1130 0.119 0.40 0.10 0.50 <0.005 <0.010 3.2 2.9 2

10/29/2002 1545 0.680 0.40 0.28 0.68 0.020 0.060 4.0 3.3 52

11/13/2002 1010 0.139 0.60 0.11 0.71 <0.005 <0.010 3.2 2.9 3

12/11/2002 1445 0.453 0.40 0.10 0.50 <0.005 <0.010 2.4 2.4 4

12/18/2002 1230 2.69 0.50 0.16 0.66 0.030 0.030 2.5 2.9 12

01/07/2003 1330 1.13 <0.10 0.99 --- <0.005 0.030 1.5 1.7 10

01/22/2003 1000 2.21 0.20 0.83 1.0 <0.005 0.020 1.1 1.2 6

02/12/2003 1130 1.27 0.30 0.58 0.88 <0.005 <0.010 2.3 2.6 19

03/11/2003 1345 6.63 <0.10 0.67 --- <0.005 0.010 1.0 1.0 11

03/25/2003 1515 17.6 <0.10 0.50 --- <0.005 0.020 1.2 1.1 14

04/08/2003 1450 5.15 <0.10 0.30 --- <0.005 0.030 1.2 1.1 23

05/05/2003 1530 6.48 <0.10 0.20 --- <0.005 0.020 1.0 0.9 29

06/03/2003 30 48.1 0.70 0.37 1.1 0.040 0.150 4.8 4.3 84

06/05/2003 1445 13.3 0.30 0.33 0.63 0.010 0.060 2.6 2.6 35

07/29/2003 1615 1.33 0.30 0.03 0.33 <0.005 <0.010 1.7 1.5 27

08/20/2003 1300 0.278 0.30 0.17 0.47 <0.005 <0.010 2.8 2.7 24

09/09/2003 1330 0.425 0.30 0.41 0.71 <0.005 0.020 2.8 2.9 28

10/28/2003 1340 0.906 0.40 0.19 0.59 0.010 <0.010 2.1 2.0 20

11/18/2003 1115 53.0 0.40 0.34 0.74 0.010 0.040 1.7 1.8 37

11/19/2003 730 33.4 0.50 0.41 0.91 <0.005 0.050 3.1 3.4 42

12/09/2003 1345 6.40 0.20 0.68 0.88 <0.005 0.040 1.5 1.5 41

01/21/2004 1415 21.4 <0.10 0.66 --- <0.005 <0.010 1.3 1.4 23

02/18/2004 1345 10.4 <0.10 0.55 --- <0.005 <0.010 1.0 1.4 46

03/05/2004 1100 81.8 1.3 0.53 1.8 0.040 0.230 --- --- 205

03/17/2004 1230 9.09 <0.10 0.51 --- <0.005 0.030 1.1 0.7 29

04/13/2004 1315 14.7 <0.10 0.26 --- <0.005 <0.010 1.4 1.3 26

04/22/2004 1415 178 1.0 0.33 1.3 0.040 0.190 7.5 6.8 134

05/19/2004 1245 9.29 0.20 0.26 0.46 <0.005 <0.010 1.8 1.6 26

06/22/2004 1420 82.1 0.70 0.37 1.1 0.020 0.150 5.1 5.2 120

06/23/2004 1015 51.8 0.40 1.3 1.7 0.020 0.090 4.5 4.6 62

07/21/2004 1130 5.10 0.29 0.11 0.40 <0.010 0.020 2.0 4.3 22
Appendix 37

Appendix 1. Water-quality data results modified from NWIS data for White River near Fayetteville (07048600), Richland Creek at Goshen 

(07048800), and War Eagle Creek near Hindsville (07049000).—Continued

[Units are in milligrams per liter unless otherwise noted; m3/s, cubic meter per second; five-digit numbers in parentheses are STORET parameter 

codes used for computer storage of data; N, nitrogen; p, phosphorus; <, less than; --, missing data. When laboratory reporting limit (LRL) values 

were originally reported, less than values were modified by dividing the LRL by 2 to get the long-term method detection level (LT–MDL) and 

the resulting LT–MDL value is reported below]

Date Time

Instantaneous 

streamflow,

in m3/s

 (30209)

Total 

ammonia 

+ organic, 

as N 

(00625)

Dissolved

nitrite + 

nitrate,

as N 

(00631)

Total 

nitrogen 

(00600)

Dissolved 

orthophosphorus, as P 

(00671)

Total

phosphorus

(00665)

Dissolved 

organic 

carbon 

(00681)

Total 

organic 

carbon 

(00680)

Suspended 

sediment 

(80154)

08/11/2004 1200 3.20 0.31 0.07 0.38 <0.010 0.040 1.8 3.3 32

09/09/2004 1400 0.396 0.24 0.10 0.35 <0.010 <0.020 2.0 3.2 22

10/05/2004 1215 0.283 0.26 0.12 0.38 <0.003 0.027 2.3 5.1 31

11/01/2004 1515 320 1.2 0.464 1.6 0.036 0.230 5.0 12.6 347

11/03/2004 1440 37.9 0.28 0.728 1.0 0.007 0.071 1.9 3.6 49

01/03/2005 1945 147 0.79 0.539 1.3 0.042 0.190 5.4 9.4 142

01/11/2005 1600 24.5 0.14 0.812 0.95 <0.003 0.024 1.7 1.9 36

03/08/2005 1500 9.80 0.16 0.275 0.44 <0.003 0.020 0.9 1.6 14

04/18/2005 1340 15.0 0.15 0.306 0.45 <0.003 0.021 1.1 1.3 12

06/29/2005 1515 0.266 0.35 0.093 0.44 <0.003 0.040 3.0 4.3 15

08/17/2005 1500 0.0934 0.39 0.187 0.58 <0.020 0.019 3.2 3.7 21

10/19/2005 1400 0.0651 0.30 0.288 0.58 <0.015 0.023 3.9 3.0 32

12/19/2005 1430 0.119 0.45 0.111 0.56 <0.015 0.091 2.7 5.1 42

02/23/2006 1540 1.02 0.26 0.220 0.48 <0.015 0.025 2.1 3.6 8

05/02/2006 1200 26.6 0.27 0.390 0.66 <0.090 0.043 1.8 4.1 32

05/04/2006 1415 276 1.8 0.369 2.2 0.003 0.330 3.4 19.5 695

05/23/2006 830 6.57 0.19 0.124 0.31 <0.003 0.013 1.3 1.7 9

07/19/2006 900 0.0850 0.34 0.172 0.52 0.004 0.030 2.4 3.4 5

08/23/2006 1330 42.2 2.0 1.08 3.0 0.044 0.390 4.9 17.5 533

08/29/2006 1600 2.55 0.61 0.572 1.2 0.012 0.086 3.9 6.1 40

11/01/2006 1215 1.73 0.22 0.489 0.71 0.003 0.026 10.9 2.1 8

12/13/2006 1230 8.92 0.16 0.974 1.1 <0.003 0.019 7.2 1.2 7

01/13/2007 1615 323 0.76 0.429 1.2 0.040 0.199 4.3 9.3 151

02/13/2007 1430 123 0.61 0.468 1.1 0.024 0.141 4.1 6.4 84

02/20/2007 1430 16.1 0.06 0.590 0.65 0.003 0.017 0.8 0.8 11

05/29/2007 1245 7.53 0.19 0.157 0.34 0.004 0.024 1.3 2.1 12

07/09/2007 1330 4.47 0.29 0.207 0.49 0.005 0.068 2.2 3.4 21

09/04/2007 1640 0.0340 0.27 0.136 0.40 0.004 0.024 2.4 4.0 8

10/22/2007 1023 1.56 0.29 0.188 0.48 0.005 0.029 2.3 2.5 8

01/14/2008 945 5.44 0.22 0.508 0.72 0.004 0.028 1.2 2.0 12

02/16/2008 2333 129 1.6 0.537 2.2 0.029 0.360 3.9 12 563

02/25/2008 1513 21.2 0.18 1.05 1.2 0.004 0.027 1.0 1.4 14

03/19/2008 1525 144 0.85 0.395 1.2 0.025 0.333 3.1 9.1 294

04/10/2008 1915 351 1.4 0.273 1.6 0.012 0.300 7.1 13.6 512

05/06/2008 940 23.8 0.18 0.252 0.43 0.004 0.028 1.2 1.6 23

06/13/2008 915 18.7 0.25 0.289 0.54 0.004 0.047 1.9 2.0 26
38 Constituent Concentrations, Loads, and Yields to Beaver Lake, Arkansas, Water Years 1999–2008

Appendix 1. Water-quality data results modified from NWIS data for White River near Fayetteville (07048600), Richland Creek at Goshen 

(07048800), and War Eagle Creek near Hindsville (07049000).—Continued

[Units are in milligrams per liter unless otherwise noted; m3/s, cubic meter per second; five-digit numbers in parentheses are STORET parameter 

codes used for computer storage of data; N, nitrogen; p, phosphorus; <, less than; --, missing data. When laboratory reporting limit (LRL) values 

were originally reported, less than values were modified by dividing the LRL by 2 to get the long-term method detection level (LT–MDL) and 

the resulting LT–MDL value is reported below]

Date Time

Instantaneous 

streamflow,

in m3/s

 (30209)

Total 

ammonia 

+ organic, 

as N 

(00625)

Dissolved

nitrite + 

nitrate,

as N 

(00631)

Total 

nitrogen 

(00600)

Dissolved 

orthophosphorus, as P 

(00671)

Total

phosphorus

(00665)

Dissolved 

organic 

carbon 

(00681)

Total 

organic 

carbon 

(00680)

Suspended 

sediment 

(80154)

07/09/2008 1450 45.3 0.79 0.290 1.1 0.019 0.143 3.7 7.3 142

08/26/2008 1120 1.02 0.45 0.448 0.90 0.008 0.084 3.4 4.5 33

Richland Creek at Goshen (07048800)

04/04/2001 1415 0.340 <0.10 1.5 --- <0.005 <0.010 2.2 2.5 17

04/17/2001 800 0.906 <0.10 1.2 --- <0.005 <0.010 1.1 1.4 17

05/01/2001 1000 0.538 0.21 0.65 0.86 <0.005 <0.010 0.6 0.9 19

05/15/2001 1210 0.680 0.40 0.74 1.1 <0.005 <0.010 2.3 1.1 23

05/30/2001 1130 0.906 0.32 0.63 0.95 <0.005 <0.010 1.4 1.5 27

06/12/2001 945 0.453 0.28 0.45 0.73 0.020 <0.010 2.3 1.6 24

06/26/2001 715 0.110 0.22 0.60 0.82 <0.005 <0.010 1.5 0.8 24

07/10/2001 1530 0.232 0.30 0.29 0.59 <0.005 <0.010 2.1 1.5 31

07/23/2001 1215 0.232 0.36 0.40 0.76 <0.005 0.020 1.3 0.8 32

08/07/2001 1125 0.0765 0.30 0.08 0.38 <0.005 <0.010 1.6 2.2 28

08/23/2001 1445 0.0481 0.40 0.05 0.45 <0.005 <0.010 1.2 1.8 37

09/05/2001 915 0.0396 <0.10 0.06 --- <0.005 <0.010 2.4 1.9 33

09/17/2001 1400 0.623 <0.10 1.2 --- 0.010 <0.010 1.7 1.7 27

10/01/2001 1400 0.368 <0.10 1.2 --- <0.005 <0.010 1.6 1.7 31

10/15/2001 1500 2.66 <0.10 2.0 --- 0.020 <0.010 2.8 2.8 29

10/29/2001 1430 0.453 <0.10 1.6 --- <0.005 <0.010 2.3 2.1 25

11/06/2001 1330 0.396 <0.10 1.2 --- <0.005 <0.010 2.5 3.0 30

11/26/2001 1510 0.340 <0.10 1.0 --- <0.005 <0.010 3.7 3.8 30

12/10/2001 1500 0.396 <0.10 1.1 --- <0.005 0.020 1.1 1.3 30

12/18/2001 930 24.6 0.30 2.2 2.5 <0.005 0.060 3.5 3.8 102

01/03/2002 1105 1.02 <0.10 2.2 --- <0.005 <0.010 3.6 3.8 28

01/14/2002 1400 0.708 <0.10 1.9 --- <0.005 <0.010 2.1 2.5 20

02/06/2002 1030 7.53 <0.10 1.7 --- <0.005 <0.010 1.9 2.0 16

02/20/2002 1300 10.4 0.40 0.91 1.3 0.020 0.040 2.8 2.8 37

03/05/2002 1510 3.51 <0.10 0.97 --- 0.020 <0.010 1.7 2.0 20

03/18/2002 1630 0 <0.10 0.69 --- 0.010 <0.010 1.3 1.3 7

04/02/2002 1515 0 0.20 1.1 1.3 <0.005 <0.010 0.8 2.0 15

04/15/2002 1615 0 <0.10 1.2 --- <0.005 <0.010 1.0 1.2 15

04/30/2002 1245 0 <0.10 0.68 --- 0.020 <0.010 0.9 1.2 9

05/13/2002 1630 0 0.60 0.85 1.4 0.020 0.060 4.1 4.5 20

05/29/2002 815 0 <0.10 0.87 --- 0.020 <0.010 2.0 1.9 12

06/17/2002 1645 0 <0.10 1.0 --- 0.020 0.020 1.4 1.3 7

07/08/2002 1230 0 0.40 0.79 1.2 0.010 0.030 1.9 2.2 5
Appendix 39

Appendix 1. Water-quality data results modified from NWIS data for White River near Fayetteville (07048600), Richland Creek at Goshen 

(07048800), and War Eagle Creek near Hindsville (07049000).—Continued

[Units are in milligrams per liter unless otherwise noted; m3/s, cubic meter per second; five-digit numbers in parentheses are STORET parameter 

codes used for computer storage of data; N, nitrogen; p, phosphorus; <, less than; --, missing data. When laboratory reporting limit (LRL) values 

were originally reported, less than values were modified by dividing the LRL by 2 to get the long-term method detection level (LT–MDL) and 

the resulting LT–MDL value is reported below]

Date Time

Instantaneous 

streamflow,

in m3/s

 (30209)

Total 

ammonia 

+ organic, 

as N 

(00625)

Dissolved

nitrite + 

nitrate,

as N 

(00631)

Total 

nitrogen 

(00600)

Dissolved 

orthophosphorus, as P 

(00671)

Total

phosphorus

(00665)

Dissolved 

organic 

carbon 

(00681)

Total 

organic 

carbon 

(00680)

Suspended 

sediment 

(80154)

07/22/2002 1500 0 0.30 0.35 0.65 <0.005 0.030 2.5 2.3 7

08/20/2002 1440 0 0.30 0.85 1.1 <0.005 0.030 1.8 1.8 8

09/03/2002 1330 0 0.60 0.42 1.0 <0.005 <0.010 2.3 1.9 11

10/08/2002 930 0 <0.10 0.14 --- <0.005 <0.010 1.2 0.9 5

10/28/2002 1500 0 <0.10 0.10 --- <0.005 <0.010 1.5 1.1 3

11/13/2002 900 0 <0.10 0.11 --- <0.005 <0.010 1.5 1.2 3

12/11/2002 1300 0.227 <0.10 0.89 --- <0.005 0.030 1.1 1.0 4

12/18/2002 1400 1.13 0.20 1.3 1.5 <0.005 <0.010 2.0 2.0 11

01/08/2003 830 1.39 <0.10 1.7 --- 0.020 <0.010 1.9 2.0 6

01/22/2003 1110 0.510 <0.10 1.5 --- <0.005 <0.010 0.8 1.0 5

02/12/2003 940 0.261 <0.10 1.1 --- <0.005 <0.010 1.8 3.5 1

03/12/2003 745 1.44 <0.10 1.2 --- <0.005 <0.010 1.0 1.3 4

03/25/2003 1415 4.96 <0.10 0.84 --- <0.005 <0.010 1.2 1.1 8

04/08/2003 1345 1.27 <0.10 0.72 --- <0.005 <0.010 1.0 0.9 19

05/05/2003 1430 1.50 <0.10 0.40 --- <0.005 <0.010 0.9 0.7 30

06/02/2003 2300 18.3 0.70 0.63 1.3 0.020 0.090 4.7 4.5 60

06/05/2003 1345 3.37 <0.10 0.64 --- 0.010 <0.010 1.4 1.3 24

07/29/2003 1540 0.0680 0.60 0.09 0.69 <0.005 0.050 2.5 2.5 28

08/20/2003 1120 0.0198 0.30 0.01 --- <0.005 <0.010 1.6 1.4 19

09/09/2003 1235 0.130 0.30 0.56 0.86 <0.005 <0.010 2.0 1.8 23

10/28/2003 1200 0.340 0.20 0.85 1.1 <0.005 <0.010 1.2 1.0 24

11/18/2003 1215 11.6 0.40 0.81 1.2 0.010 0.060 2.9 2.7 48

11/19/2003 845 8.41 0.30 0.84 1.1 <0.005 0.030 2.5 2.5 28

12/09/2003 1130 1.47 <0.10 1.1 --- <0.005 <0.010 1.1 1.0 28

01/21/2004 1245 4.76 <0.10 1.1 --- <0.005 0.010 1.7 1.9 22

02/18/2004 1245 2.38 <0.10 1.1 --- <0.005 0.010 1.0 1.0 46

03/17/2004 1030 2.04 <0.10 0.86 --- <0.005 0.010 0.8 0.7 26

04/13/2004 1440 3.74 <0.10 0.28 --- <0.005 <0.010 1.1 1.1 17

04/22/2004 1715 36.0 0.70 0.58 1.3 0.030 0.120 5.2 5.3 119

05/19/2004 930 2.41 <0.10 0.60 --- <0.005 <0.010 1.4 1.1 34

06/23/2004 850 13.8 0.30 0.66 0.96 <0.005 0.050 3.7 3.8 41

07/21/2004 940 1.36 0.18 1.17 1.3 <0.010 <0.020 1.1 2.6 33

08/11/2004 1530 0.878 0.13 0.89 1.0 <0.010 <0.020 1.1 1.5 26

09/08/2004 1250 0.159 0.16 0.38 0.55 <0.010 <0.020 1.3 2.0 25

10/05/2004 1330 0.0538 0.17 0.031 0.20 <0.003 0.013 1.3 3.2 23

11/01/2004 1700 68.5 1.0 1.1 2.1 0.042 0.220 5.3 12.3 351
40 Constituent Concentrations, Loads, and Yields to Beaver Lake, Arkansas, Water Years 1999–2008

Appendix 1. Water-quality data results modified from NWIS data for White River near Fayetteville (07048600), Richland Creek at Goshen 

(07048800), and War Eagle Creek near Hindsville (07049000).—Continued

[Units are in milligrams per liter unless otherwise noted; m3/s, cubic meter per second; five-digit numbers in parentheses are STORET parameter 

codes used for computer storage of data; N, nitrogen; p, phosphorus; <, less than; --, missing data. When laboratory reporting limit (LRL) values 

were originally reported, less than values were modified by dividing the LRL by 2 to get the long-term method detection level (LT–MDL) and 

the resulting LT–MDL value is reported below]

Date Time

Instantaneous 

streamflow,

in m3/s

 (30209)

Total 

ammonia 

+ organic, 

as N 

(00625)

Dissolved

nitrite + 

nitrate,

as N 

(00631)

Total 

nitrogen 

(00600)

Dissolved 

orthophosphorus, as P 

(00671)

Total

phosphorus

(00665)

Dissolved 

organic 

carbon 

(00681)

Total 

organic 

carbon 

(00680)

Suspended 

sediment 

(80154)

11/03/2004 1315 12.1 0.24 3.9 4.1 0.014 0.043 1.9 3.2 43

01/04/2005 855 61.4 1.6 0.868 2.5 0.078 0.440 5.7 19.5 1050

01/11/2005 1400 1.59 0.10 1.51 1.6 0.006 0.019 1.1 1.4 26

03/07/2005 1330 2.55 0.09 0.592 0.68 <0.003 0.007 0.9 1.3 4

04/18/2005 1430 4.62 0.12 0.454 0.57 <0.015 0.012 1.5 1.0 6

06/28/2005 1445 0.159 0.30 0.049 0.35 <0.003 0.021 1.5 2.3 9

08/15/2005 1430 0.0311 0.29 0.014 0.31 <0.020 0.028 9.7 3.5 16

10/19/2005 1230 0.0116 0.27 0.018 0.29 <0.015 0.023 3.9 2.4 35

12/19/2005 1330 0.0136 0.14 0.040 --- <0.015 0.009 1.0 3.9 60

02/22/2006 1410 0.139 0.11 0.257 0.37 <0.015 0.007 1.0 1.5 2

05/04/2006 1700 84.4 1.0 0.356 1.4 0.037 0.220 7.8 15.3 363

05/23/2006 1230 0.736 0.16 0.369 0.53 <0.003 0.009 1.3 2.8 3

07/19/2006 815 0.0272 0.26 0.012 0.27 0.003 0.016 1.6 2.2 4

08/23/2006 1415 8.98 1.4 2.11 3.5 0.207 0.430 8.5 13.3 143

08/29/2006 1355 0.235 0.28 1.31 1.6 0.007 0.020 2.3 2.9 5

10/31/2006 1315 0.708 0.20 1.44 1.6 0.004 0.017 8.2 2.6 5

12/13/2006 1320 0.263 0.16 2.0 2.2 0.006 0.015 25.4 1.5 7

01/13/2007 1715 116 1.6 0.581 2.2 0.063 0.340 5.0 17.6 876

02/13/2007 1400 29.7 0.49 0.805 1.3 0.021 0.094 4.0 5.9 55

02/20/2007 1515 3.40 <0.05 1.36 --- 0.006 0.008 0.9 1.2 6

05/29/2007 1400 0.680 0.12 0.313 0.43 0.004 0.009 1.0 1.4 6

07/09/2007 1500 0.396 0.20 0.226 0.42 0.003 0.015 1.8 2.2 5

09/04/2007 1600 0.0850 0.25 0.035 0.29 0.007 0.019 2.0 2.4 6

10/22/2007 1130 0.235 0.14 0.220 0.36 0.004 0.008 1.5 1.6 2

01/14/2008 1155 0.595 0.11 0.894 1.0 0.004 0.008 1.2 1.1 5

02/17/2008 1230 50.1 0.78 1.21 2.0 0.050 0.208 6.7 8.6 89

02/25/2008 1448 2.63 0.11 1.86 2.0 0.007 0.013 1.2 1.2 5

03/19/2008 1310 762 1.0 0.853 1.9 0.052 0.330 6.6 10.4 428

04/10/2008 1720 1270 1.4 0.559 2.0 0.027 0.330 3.9 13.3 582

05/06/2008 1040 65.4 0.12 0.669 0.79 0.006 0.016 1.0 1.4 14

06/09/2008 1010 74.8 0.24 0.531 0.77 0.003 0.029 1.4 1.6 13

08/26/2008 1042 35.7 0.43 1.03 1.5 0.004 0.047 2.3 3.5 18

09/04/2008 1300 47.3 0.59 1.27 1.9 0.048 0.116 5.0 7.6 27

War Eagle Creek near Hindsville (07049000)

04/05/2001 830 2.15 <0.10 1.5 --- 0.030 0.030 1.8 --- 19

04/17/2001 1400 4.53 0.21 0.89 1.1 0.020 0.030 2.0 2.4 21
Appendix 41

Appendix 1. Water-quality data results modified from NWIS data for White River near Fayetteville (07048600), Richland Creek at Goshen 

(07048800), and War Eagle Creek near Hindsville (07049000).—Continued

[Units are in milligrams per liter unless otherwise noted; m3/s, cubic meter per second; five-digit numbers in parentheses are STORET parameter 

codes used for computer storage of data; N, nitrogen; p, phosphorus; <, less than; --, missing data. When laboratory reporting limit (LRL) values 

were originally reported, less than values were modified by dividing the LRL by 2 to get the long-term method detection level (LT–MDL) and 

the resulting LT–MDL value is reported below]

Date Time

Instantaneous 

streamflow,

in m3/s

 (30209)

Total 

ammonia 

+ organic, 

as N 

(00625)

Dissolved

nitrite + 

nitrate,

as N 

(00631)

Total 

nitrogen 

(00600)

Dissolved 

orthophosphorus, as P 

(00671)

Total

phosphorus

(00665)

Dissolved 

organic 

carbon 

(00681)

Total 

organic 

carbon 

(00680)

Suspended 

sediment 

(80154)

05/02/2001 745 1.56 0.36 0.84 1.2 0.020 0.020 1.0 1.2 22

05/16/2001 850 1.33 0.42 1.0 1.4 0.050 0.070 1.7 1.3 28

05/30/2001 800 1.67 0.26 1.1 1.4 0.030 0.020 1.5 1.4 25

06/12/2001 800 0.934 0.24 1.0 1.2 0.050 0.040 2.2 2.1 27

06/25/2001 1330 0.793 0.21 0.94 1.1 0.020 0.020 1.0 0.8 23

07/09/2001 1215 0.991 0.20 1.3 1.5 0.030 0.040 2.2 1.6 28

07/24/2001 1400 0.651 0.26 0.84 1.1 0.030 0.050 1.3 1.0 26

08/07/2001 615 0.425 0.30 0.76 1.1 <0.005 0.020 2.4 1.8 32

08/21/2001 1130 0.368 0.30 0.41 0.71 <0.005 <0.010 2.9 1.8 42

09/05/2001 730 0.481 <0.10 0.78 --- <0.005 <0.010 2.2 2.5 31

09/18/2001 930 0.850 0.20 1.9 2.1 0.040 0.050 2.9 2.3 25

10/04/2001 800 0.510 <0.10 1.2 --- 0.040 0.050 1.6 1.5 36

10/16/2001 1530 3.40 <0.10 0.86 --- 0.050 0.050 3.0 2.9 26

11/01/2001 730 0.623 <0.10 1.2 --- 0.020 0.030 1.7 1.7 23

11/06/2001 1215 0.651 0.30 1.3 1.6 0.030 0.040 5.3 5.4 34

11/26/2001 1645 1.58 <0.10 1.2 --- 0.060 0.070 3.5 3.8 39

12/13/2001 715 2.97 <0.10 1.0 --- 0.070 0.070 1.9 1.9 30

12/18/2001 815 77.0 0.50 1.9 2.4 0.020 0.080 4.4 6.7 95

01/03/2002 1315 2.35 <0.10 2.2 --- 0.040 0.050 3.7 3.8 26

01/16/2002 1530 1.61 <0.10 2.1 --- 0.080 0.080 0.7 0.6 24

02/06/2002 930 12.1 <0.10 1.7 --- 0.010 0.020 1.8 1.9 20

02/20/2002 1545 16.0 0.30 1.0 1.3 0.020 0.050 1.7 2.1 46

03/07/2002 1530 8.89 <0.10 0.87 --- 0.040 0.030 2.4 --- 23

03/18/2002 1530 8.61 0.20 0.80 1.0 <0.005 <0.010 1.6 1.6 32

04/02/2002 1400 10.1 <0.10 1.3 --- <0.005 0.020 0.9 1.8 26

04/16/2002 1100 10.7 <0.10 1.4 --- 0.020 0.020 1.2 1.2 11

04/30/2002 1145 10.6 <0.10 0.71 --- 0.020 0.030 1.2 1.3 10

05/13/2002 1500 12.8 1.4 1.1 2.5 0.040 0.060 2.0 2.1 16

05/29/2002 715 9.68 <0.10 1.4 --- 0.030 <0.010 1.5 1.4 15

06/17/2002 1530 8.21 <0.10 1.4 --- 0.020 0.020 1.3 1.4 12

07/08/2002 1345 2.10 <0.10 1.4 --- 0.030 0.040 1.6 1.7 7

07/22/2002 1330 3.26 0.20 1.4 1.6 0.070 0.060 2.1 1.3 8

08/20/2002 1615 2.83 <0.10 1.9 --- 0.030 0.060 2.3 2.3 11

09/03/2002 1230 0.680 0.30 1.4 1.7 <0.005 <0.010 1.4 1.1 12

10/08/2002 830 0.425 <0.10 1.4 --- <0.005 <0.010 1.2 1.1 4

10/28/2002 1350 1.05 <0.10 1.6 --- <0.005 <0.010 1.4 1.2 1
42 Constituent Concentrations, Loads, and Yields to Beaver Lake, Arkansas, Water Years 1999–2008

Appendix 1. Water-quality data results modified from NWIS data for White River near Fayetteville (07048600), Richland Creek at Goshen 

(07048800), and War Eagle Creek near Hindsville (07049000).—Continued

[Units are in milligrams per liter unless otherwise noted; m3/s, cubic meter per second; five-digit numbers in parentheses are STORET parameter 

codes used for computer storage of data; N, nitrogen; p, phosphorus; <, less than; --, missing data. When laboratory reporting limit (LRL) values 

were originally reported, less than values were modified by dividing the LRL by 2 to get the long-term method detection level (LT–MDL) and 

the resulting LT–MDL value is reported below]

Date Time

Instantaneous 

streamflow,

in m3/s

 (30209)

Total 

ammonia 

+ organic, 

as N 

(00625)

Dissolved

nitrite + 

nitrate,

as N 

(00631)

Total 

nitrogen 

(00600)

Dissolved 

orthophosphorus, as P 

(00671)

Total

phosphorus

(00665)

Dissolved 

organic 

carbon 

(00681)

Total 

organic 

carbon 

(00680)

Suspended 

sediment 

(80154)

11/13/2002 800 0.736 <0.10 1.6 --- 0.030 0.040 1.4 1.4 3

12/09/2002 1445 1.33 0.30 1.8 2.1 0.040 0.060 1.3 1.5 <0.5

12/19/2002 845 1.93 0.40 2.1 2.5 0.190 0.210 2.1 2.7 7

01/07/2003 1045 3.48 <0.10 1.6 --- 0.030 0.050 1.3 1.5 5

01/22/2003 1245 0.821 <0.10 1.5 --- 0.080 0.110 1.6 1.7 2

02/12/2003 830 0.453 0.20 1.3 1.5 0.040 0.050 1.8 2.9 3

03/11/2003 1220 3.40 <0.10 1.3 --- <0.005 <0.010 1.0 1.0 6

03/25/2003 1245 9.71 <0.10 1.0 --- 0.020 0.050 1.2 1.1 13

04/09/2003 730 2.86 <0.10 0.98 --- 0.020 0.050 1.3 1.1 25

05/05/2003 1300 3.06 <0.10 0.51 --- 0.020 0.040 1.1 1.0 35

06/03/2003 745 21.3 0.30 0.61 0.91 0.010 0.070 2.0 1.9 66

06/05/2003 1215 7.39 <0.10 0.88 --- 0.030 0.050 2.0 2.2 32

07/29/2003 1445 0.510 0.20 0.94 1.1 0.030 0.040 1.6 1.3 37

08/20/2003 1025 0.368 0.20 0.54 0.74 <0.005 0.010 1.8 1.5 27

09/09/2003 1130 0.453 0.20 1.6 1.8 0.020 0.030 1.6 1.6 27

10/28/2003 1100 0.878 0.30 0.97 1.3 0.090 0.080 1.5 1.5 21

11/18/2003 1655 21.8 0.50 0.79 1.3 0.100 0.180 2.0 1.9 89

11/19/2003 1115 13.0 0.50 0.70 1.2 0.020 0.080 3.3 4.2 45

12/09/2003 1000 2.29 <0.10 1.2 --- 0.040 0.050 1.0 1.0 28

01/21/2004 1130 9.00 <0.10 0.69 --- <0.005 0.020 1.5 1.6 28

02/18/2004 1045 4.67 <0.10 1.1 --- <0.005 0.020 0.9 0.9 45

03/17/2004 930 3.82 <0.10 1.0 --- 0.040 0.060 0.9 0.7 30

04/13/2004 1625 6.65 <0.10 0.42 --- 0.020 0.040 1.4 1.3 12

04/22/2004 1800 129 1.2 0.43 1.6 0.020 0.240 7.1 6.6 267

05/19/2004 830 5.55 <0.10 1.3 --- <0.005 <0.010 1.4 1.3 35

06/23/2004 725 6.65 <0.10 1.3 --- 0.030 0.060 1.8 1.9 43

07/21/2004 830 1.64 0.11 1.1 1.2 0.020 <0.020 1.1 2.1 30

08/11/2004 1400 1.33 0.18 1.23 1.4 0.020 0.050 1.2 2.6 34

09/08/2004 1100 0.340 0.16 1.57 1.7 <0.010 0.030 1.1 1.7 34

10/05/2004 1045 0.283 0.15 1.24 1.4 0.006 0.019 1.1 3.1 54

11/02/2004 1115 51.0 0.60 1.2 1.8 0.023 0.138 4.3 7.2 133

11/03/2004 925 56.9 0.36 1.57 1.9 0.023 0.078 2.4 4.4 61

01/04/2005 1230 48.7 1.4 1.38 2.7 0.044 0.300 3.9 15.5 454

01/11/2005 1250 17.3 0.13 1.91 2.0 0.017 0.038 1.4 1.6 38

03/08/2005 815 7.11 0.12 0.931 1.1 <0.003 0.018 1.1 1.3 8

04/19/2005 800 8.33 0.12 0.709 0.83 <0.003 0.036 1.0 1.7 13
Appendix 43

Appendix 1. Water-quality data results modified from NWIS data for White River near Fayetteville (07048600), Richland Creek at Goshen 

(07048800), and War Eagle Creek near Hindsville (07049000).—Continued

[Units are in milligrams per liter unless otherwise noted; m3/s, cubic meter per second; five-digit numbers in parentheses are STORET parameter 

codes used for computer storage of data; N, nitrogen; p, phosphorus; <, less than; --, missing data. When laboratory reporting limit (LRL) values 

were originally reported, less than values were modified by dividing the LRL by 2 to get the long-term method detection level (LT–MDL) and 

the resulting LT–MDL value is reported below]

Date Time

Instantaneous 

streamflow,

in m3/s

 (30209)

Total 

ammonia 

+ organic, 

as N 

(00625)

Dissolved

nitrite + 

nitrate,

as N 

(00631)

Total 

nitrogen 

(00600)

Dissolved 

orthophosphorus, as P 

(00671)

Total

phosphorus

(00665)

Dissolved 

organic 

carbon 

(00681)

Total 

organic 

carbon 

(00680)

Suspended 

sediment 

(80154)

06/28/2005 1330 0.651 0.24 0.914 1.1 0.006 0.043 1.7 1.9 9

08/15/2005 1330 0.368 0.34 0.414 0.75 <0.020 0.035 2.7 3.0 8

10/19/2005 1120 0.255 0.20 0.721 0.92 <0.015 0.023 2.1 4.4 39

12/19/2005 1200 0.368 0.19 1.14 1.3 0.030 0.066 1.4 3.3 43

02/22/2006 1200 0.595 0.17 0.631 0.80 0.033 0.070 1.3 3.3 3

05/04/2006 1900 146 1.6 0.673 2.3 0.060 0.380 5.8 17.8 517

05/23/2006 1100 3.11 0.18 1.18 1.4 0.017 0.035 1.3 1.5 12

07/19/2006 650 0.368 0.32 0.257 0.58 0.003 0.026 1.4 2.2 10

08/29/2006 1240 0.906 0.31 1.46 1.8 0.015 0.041 1.9 2.7 8

11/01/2006 1100 1.87 0.20 1.53 1.7 0.067 0.100 21.7 2.2 6

12/13/2006 1040 6.14 0.12 2.36 2.5 0.025 0.051 29.8 1.5 10

02/13/2007 1300 96.6 0.79 0.973 1.8 0.022 0.194 4.1 8.1 146

02/20/2007 1630 8.81 <0.05 1.84 --- 0.019 0.033 0.9 1.2 18

05/30/2007 820 1.87 0.16 0.968 1.1 0.014 0.033 1.1 1.7 9

07/10/2007 1345 1.39 0.20 0.530 0.73 0.016 0.032 1.9 2.3 4

09/04/2007 1510 0.340 0.21 0.367 0.58 0.006 0.025 1.5 2.7 5

10/22/2007 1245 0.651 0.20 1.19 1.4 0.021 0.035 1.9 2.0 3

01/14/2008 1047 2.29 0.21 0.859 1.1 0.021 0.049 2.0 2.4 9

02/25/2008 1327 5.55 0.13 2.26 2.4 0.020 0.040 1.1 1.5 8

03/04/2008 1030 111 0.76 1.73 2.5 0.025 0.210 4.0 8.1 187

03/19/2008 1015 881 0.97 0.844 1.8 0.063 0.329 9.9 11.0 279

04/10/2008 1430 1060 2.3 0.347 2.6 0.056 0.460 8.2 21.6 727

05/06/2008 1140 7.84 0.12 0.999 1.1 0.008 0.023 1.1 1.5 164

06/09/2008 1110 3.48 0.17 0.886 1.1 0.022 0.044 1.3 1.6 11

08/26/2008 957 1.30 0.26 1.68 1.9 0.048 0.075 1.8 2.0 11

09/04/2008 1400 42.8 0.54 1.68 2.2 0.037 0.115 3.8 4.3 73
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For more information concerning the research

described in the report

U.S. Geological Survey

Arkansas Water Science Center

401 Hardin Road

Little Rock, AR 72211-3528

(501) 228-3600

http://ar.water.usgs.gov
Bolyard—Constituent Concentrations, Loads, and Yields to Beaver Lake, Arkansas, Water Years 1999–2008—Scientific Investigations Report 2010–5181