Prepared in cooperation with Douglas County 

Water Quality and Algal Data for the North Umpqua 

River Basin, Oregon, 2005 

By Dwight Q. Tanner, Andrew J. Arnsberg, Chauncey W. Anderson, and Kurt D. Carpenter 

Data Series 229 

U.S. Department of the Interior 

U.S. Geological Survey 
Cover: A USGS scientist collects water samples from the North Umpqua River. 

ii 
U.S. Department of the Interior 

DIRK A. KEMPTHORNE, Secretary 

U.S. Geological Survey 

MARK E. MYERS, Director 

U.S. Geological Survey, Reston, Virginia 2006 

For more information on the USGS—the Federal source for science about the Earth, 

its natural and living resources, natural hazards, and the environment: 

World Wide Web: http://www.usgs.gov 

Telephone: 1-888-ASK-USGS 

Suggested citation: 

Tanner, D.Q., Arnsberg, A.J., Anderson, C.W., and Carpenter, K.D., 2006, Water quality and algal data 

for the North Umpqua River Basin, Oregon, 2005: U.S. Geological Survey Data Series Report 229,

http://pubs.usgs.gov/ds/2006/229/.

Any use of trade, firm, or product names is for descriptive purposes only and does not 

imply endorsement by the U.S. Government 

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

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

iii 
CONTENTS 

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

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

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

Water-Quality Samples and Field Measurements ...................................................................................................5

Algae sampling................................................................................................................................................................7

Quality Assurance ..........................................................................................................................................................8

Results ..................................................................................................................................................................................9

Water-Quality Samples and Field Measurements ...................................................................................................9

Algae.................................................................................................................................................................................9

References Cited ..............................................................................................................................................................10

Figures 

Figure 1. Map showing sampling-site locations in the North Umpqua River Basin, Oregon ...............................2

Tables 

Table 1. Water-quality sampling sites for the July 2005 synoptic survey of the North Umpqua River Basin, 

Oregon ..................................................................................................................................................................................4

Table 2. Methods of water-quality and algal analysis for samples from the North Umpqua River Basin, 

Oregon, July 2005 ...............................................................................................................................................................6

Tables 3–14 are in separate PDF files that can be opened by clicking on links in the report text. 

iv 
Conversion Factors 

Inch/Pound to SI 

Multiply By To obtain 

micrometer (μm) 0.00004 inch (in.) 

cubic micrometer (μm3) 6.10237 x 10-14 cubic inch (in.3) 

millimeter (mm) 0.03937 inch (in.) 

centimeter (cm) 0.3937 inch (in.) 

square centimeter (cm2) 0.1550 square inch (in.2) 

square meter (m2) 10.76 square foot (ft2) 

milligram 0.03527 ounce, avoirdupois (oz) 

milliliter (mL) 0.00382 ounce, fluid (fl. oz) 

liter (L) 33.82 ounce, fluid (fl. oz) 

liter (L) 1.057 quart (qt) 

cubic foot per second (ft3

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

Horizontal coordinate information is referenced to the North American Datum of 1927 (NAD 27). 

Concentrations of water chemistry constituents are reported in milligrams per liter (mg/L), which is 

approximately equivalent to parts per million, and micrograms per liter (μ/L), which is approximately 

equivalent to parts per billion. 

Specific conductance is reported in microsiemens per centimeter at 25 degrees Celsius (μS/cm at 25 °C). 

Temperature in degrees Celsius (°C) may be converted to degrees Fahrenheit (°F) as follows: 

°F=(1.8×°C)+32 

v 
 Water Quality and Algal Data for the North Umpqua 

River Basin, Oregon, 2005 

By Dwight Q. Tanner, Andrew J. Arnsberg, Chauncey W. Anderson, and Kurt D. Carpenter 

Introduction 

The upper North Umpqua River Basin (fig. 1), including the PacificCorp hydroelectric project 

area in the headwaters and the Wild and Scenic Reach farther downstream, has experienced a variety of 

water-quality problems since at least the early 1990’s. A previous report documented nutrient and algal 

conditions, the degree of compliance with State of Oregon water-quality standards, and associations with 

land use in the North Umpqua River during summer of 1995 (Anderson and Carpenter, 1998). Several 

reaches of the North Umpqua River are listed as water-quality limited under section 303(d) of the Clean 

Water Act (Oregon Department of Environmental Quality, 2006). The main-stem North Umpqua River is 

listed as water-quality limited between Lemolo Reservoir and Steamboat Creek (temperature, total 

dissolved gases, and arsenic) and Diamond Lake, in the headwaters of the Basin, is also listed as a waterquality limited waterbody (pH, nuisance algae) (Oregon Department of Environmental Quality, 2006). A 

draft Total Maximum Daily Load (TMDL) was proposed for various parameters (Eilers and others, 2003) 

and is expected to be adopted in full in 2006. 

Diamond Lake, a eutrophic lake that is an important source of water and nutrients to the upper 

North Umpqua River (Anderson and Carpenter, 1998), has experienced potentially toxic blue-green algae 

blooms since 2001 that have resulted in closures to recreational water contact and impacts to the local 

economy. Increased populations of the invasive tui chub fish are reportedly responsible, because they feed 

on zooplankton that would otherwise control the algal blooms. The Final Environmental Impact 

Statement (FEIS) for the Diamond Lake Restoration Project (U.S. Forest Service, 2004) advocates 

reduced fish biomass in Diamond Lake in 2006 as the preferred alternative. A restoration project 

scheduled to reduce fish biomass for the lake includes a significant water-level drawdown that began in 

January 2006. After the drawdown of Diamond Lake, the fish toxicant rotenone was applied to eradicate 

the tui chub. The lake will be refilled and restocked with game fish in 2007 (U.S. Forest Service, 2004). 

Winter exports of nutrients from Diamond Lake during the restoration project could affect the 

summer trophic status of the North Umpqua River if retention and recycling in Lemolo Lake are 

significant. The FEIS includes comprehensive monitoring to assess the water quality of the restored 

Diamond Lake and the effects of that restoration downstream. Included in the monitoring is the North 

Umpqua River from Lake Creek through the Wild and Scenic Reach of the North Umpqua River, to the 

terminus of the Wild and Scenic Reach upstream of Idleyld Park (fig. 1). 

1 
Figure 1. Sampling-site locations in the North Umpqua River Basin, Oregon 

One component of the monitoring is the collection of baseline data, in order to observe changes in 

the river’s water quality and algal conditions resulting from the restoration of Diamond Lake. During July 

2005, the U. S. Geological Survey (USGS), in cooperation with Douglas County, performed a synoptic 

survey of water quality and algal conditions, the results of which can be used for comparison with postrestoration conditions in the river as well as with those documented for 1995 (Anderson and Carpenter, 

1998). The data in this report are an essential component of a project being implemented by the local, 

2 
State, and Federal partners of the Diamond Lake Working Group to address the lake’s water-quality 

problems. The Diamond Lake Working Group includes the Umpqua National Forest, U.S. Fish and 

Wildlife Service, U.S. Environmental Protection Agency, Oregon Department of Fish and Wildlife, 

Oregon Department of Environmental Quality, Oregon Economic and Community Development 

Department, Oregon Water Resources Department, Oregon Division of State Lands, Douglas County, 

PacificCorp, and State Representative Susan Morgan. 

Purpose and Scope 

The overall study objective was to observe changes in water quality and algae condtions of the 

North Umpqua River Basin that could result from restoration efforts at Diamond Lake. The specific 

objectives were to (1) collect data on nutrients and algae before the drawdown at Diamond Lake to allow 

an assessment of potential nutrient sources or sinks, and the status of adherence to State water-quality 

standards and (2) provide data for subsequent evaluation of potential changes in water quality resulting 

from the drawdown. 

The purpose of this report is to document water-quality data from locations sampled in the North 

Umpqua River Basin during July 2005 in conjunction with studies of Diamond Lake prior to rotenone 

application in September 2006. The report presents data from the 2005 survey to help fulfill the 

requirement for predrawdown water-quality data. Nutrients, field parameters (temperature, specific 

conductance, pH, and dissolved oxygen), and periphyton algal samples were collected from sites in the 

hydroelectric project area and in the Wild and Scenic Reach. Most sites sampled in 2005 were the same as 

those sampled in 1995 (Anderson and Carpenter, 1998). Field parameters were measured at the time of 

water sampling and also during the morning and afternoon, to attempt to document the patterns and 

magnitudes of diel minima and maxima of dissolved oxygen and pH as indicators of primary production 

in the river. Organic carbon and nitrogen, both particulate and dissolved, also were analyzed from 

selected sites because they are likely to be an important component of material exported from Diamond 

Lake during the restoration project (U.S. Forest Service, 2004) and were shown to be important factors 

related to the community structure of periphytic algae in the upper basin during 1995 (Anderson and 

Carpenter, 1998). Dissolved silica and arsenic were analyzed at two sites. Assistance during the field 

survey was provided by Douglas County, Oregon Department of Fish and Wildlife, PacifiCorp, and the U. 

S. Forest Service. 

Methods 

The methods for data collection for this study were described in the Quality Assurance Project 

Plan (unpublished) that was prepared by the U.S. Forest Service, Umpqua National Forest, in cooperation 

with the U.S. Geological Survey and the Oregon Department of Environmental Quality (ODEQ). Twentytwo sites were sampled from July 25 to July 29, 2005 (fig. 1 and table 1). 

3 
Table 1. Water-quality sampling sites for the July 2005 synoptic survey of the North Umpqua River Basin, 

Oregon

[ODEQ, Oregon Department of Environmental Quality; °, degree; ', minute; ", second; N, north; W, west; NA, not 

applicable] 

Map 

reference 

number Site name 

Mainstem 

river 

mile 

Tributary 

river mile 

Site 

acronym USGS site number 

ODEQ site 

number 

Site latitude 

and longitude, 

NAD 27 

1 North Umpqua River above 

Lemolo Lake near Inlet 

Campground 

94.8 NA INLET 431839122091300 32144 43°18'39" N 

122°09'13" W 

2 Lake Creek above Lemolo 

Lake 

93.8 1 LAKEM 431750122104500 32415 43°17'50" N 

122°10'45" W 

3 North Umpqua River below 

Lemolo Lake 

92.6 NA LEM1G 14313500 32416 43°19'20" N 

122°11'40" W 

4 North Umpqua River above 

Toketee Reservoir 

77.1 NA TOKLKI 431617122242200 25694 43°16'17" N 

122°24'22" W 

5 Clearwater Canal #2 

Penstock inflow 

75.4 NA CLR2P 431553122243400 25741 43°15'53" N 

122°24'34" W 

6 Clearwater River # 2 Bypass 

Reach 

75.4 0 CLR2B 431546122250600 32147 43°15'46" N 

122°25'06" W 

7 North Umpqua River below 

Toketee Reservoir 

75.4 NA TOKET 431552122252100 25695 43°15'52" N 

122°25'21" W 

8 North Umpqua River at 

Soda Springs 

69 NA BSODA 14316460 25700 43°18'22" N 

122°30'42" W 

9 Boulder Creek near mouth 67.9 0 BOULM 14316495 32149 43°18'13" N 

122°31'45" W 

10 North Umpqua River above 

Copeland Creek 

67.2 NA COPEG 14316500 23897 43°17'46" N 

122°32'08" W 

11 Copeland Creek near mouth 66.6 0 COPEM 431730122323800 32150 43°17'30" N 

122°32'38" W 

12 Calf Creek near mouth 61.8 0 CALFM 431728122370800 32151 43°17'28" N 

122°37'08" W 

13 Panther Creek near mouth 57.7 0 PANTM 431815122404400 32152 43°18'15" N 

122°40'44" W 

14 North Umpqua River above 

Apple Creek 

57.5 NA NUAPC 431820122403700 32153 43°18'20" N 

122°40'37" W 

4 
Table 1. Water-quality sampling sites for the July 2005 synoptic survey of the North Umpqua River Basin, 

Oregon—continued 

[ODEQ, Oregon Department of Environmental Quality; °, degree; ', minute; ", second; N, north; W, west; NA, not 

applicable] 

Map 

reference 

number Site name 

Mainstem 

river 

mile 

Tributary 

river mile 

Site 

acronym USGS site number 

ODEQ site 

number 

Site latitude 

and longitude, 

NAD 27 

15 North Umpqua River at Mott 

Bridge 

53.2 NA MOTTB 432034122440100 32154 43°20'34" N 

122°44'01" W 

16 Steamboat Creek near mouth 53.0 0.5 STEAM 14316700 32155 43°21'00" N 

122°43'40" W 

17 North Umpqua River near 

Steamboat 

52.5 NA NUSTM 432034122442500 32156 43°20'34" N 

122°44'25" W 

18 North Umpqua River below 

Steamboat Creek 

48.2 NA NUBWC 14316800 32158 43°19'18" N 

122°48'30" W 

19 North Umpqua River near 

Idleyld Park 

36.2 NA NURCR 14317450 23892 43°19'29" N 

122°59'55" W 

20 Rock Creek near mouth 35.7 0 ROCKM 432000123000700 32477 43°20'00" N 

123°00'07" W 

21 Little River near Glide 29.1 0.04 LITGL 431750123060000 28396 43°17'50" N 

123°06'00" W 

22 North Umpqua River near 

Glide 

27.8 NA NUGLD 431827123072200 32159 43°18'27" N 

123°07'22" W 

Water-Quality Samples and Field Measurements 

Water samples for laboratory analysis were collected according to the standard USGS protocols 

(Wilde and others, 1999) and ODEQ protocols (Oregon Department of Environmental Quality, 1998). 

Water samples were collected using the Equal-Width-Increment (EWI) method, a depth and width 

integrating technique described by Edwards and Glysson (1999) and adapted for clean sampling (Wilde 

and others, 1999). Samples for dissolved constituents were filtered in the field using Gelman capsule 

filters with a pore size of 0.45 μm. Samples were preserved according to ODEQ requirements as specified 

in table 2. 

5 
Table 2. Methods of water-quality and algal analysis for samples from the North Umpqua River 

Basin, Oregon, July 2005

[Measurements made directly in the field included water temperature, specific conductance, pH, and dissolved oxygen; 

NA, not applicable; C, Celsius; μS/cm, microsiemens per centimeter; mg/L, milligrams per liter; QAPP, U.S. Forest 

Service Quality Assurance Project Plan; mg/m2

, milligrams per square meter; g/m2, grams per square meter.] 

Medium 

sampled Parameter 

Analytical 

method 

Detection limit or 

resolution Reporting limit 

Sample 

preservation 

Water, 

in situ

Water temperature 170.1 a 0.1 ̊C 0.1 ̊C NA 

Water, 

in situ

Specific conductance, 

field 

120.1 a 1 μS/cm 1 μS/cm NA 

Water, 

in situ

pH, field 150.1 a 0.01 standard 

 units 

0.1 standard 

 units 

NA 

Water, 

in situ

Dissolved oxygen, field 4500-O G b 0.01 mg/L 0.1 mg/L NA 

Dissolved orthophosphate 

as P 

4500-P E b 0.0004 mg/L 0.005 mg/L None 

Dissolved organic carbon 5310 B b NA 1 mg/L H2SO4

Dissolved arsenic 3120 B b0.003 mg/L 0.01 mg/L None 

Water, 

filtered 

Dissolved silica 3120 B b 0.003 mg/L 0.15 mg/L None 

Ammonia as N 4500-NH3

b 0.02 mg/L 0.02 mg/L H2SO4

Total Kjeldahl nitrogen as 

N (organic+ammonium N 

in QAPP) 

351.2 a 0.1 mg/L 0.2 mg/L H2SO4

Nitrite plus nitrate as N 4500-NO3 F b 0.001 mg/L 0.005 mg/L H2SO4

Total phosphorus as P 4500-P E b 0.003 mg/L 0.01 mg/L H2SO4

Water, 

unfiltered 

Total organic carbon 5310 B b

NA 1 mg/L H2SO4

Chlorophyll a and 

Pheophytin a 

10200-H b NA 0.1 mg/m2

Algae, Freezing 

periphyton 

Ash-free dry weight 10300 C b 0.1 g/m2 1 g/m2 Freezing 

a

 U.S. Environmental Protection Agency, 1983 

b

 American Public Health Association, 1992 

6 
Laboratory analyses were performed at the ODEQ laboratory following the procedures and 

protocols described in the ODEQ Laboratory Field Sampling Reference Guide (Oregon Department of 

Environmental Quality, 1998), and the ODEQ Laboratory Quality Assurance Manual, (Oregon 

Department of Environmental Quality, 2004). The ODEQ laboratory reported any nutrient value that was 

below the method reporting limit with the letter “E” appended to the numerical value. If the value was 

also smaller than the method detection limit, the value was preceded by “<.” 

The USGS National Water Quality Laboratory (NWQL) was used to analyze several quality 

assurance samples. For the 1995 study (Anderson and Carpenter, 1998), the USGS NWQL was used for 

all water-quality samples. Methods of sample preservation and laboratory analysis used by the NWQL in 

1995 and in 2005 differed from the ODEQ methods used for the present study in that the only 

preservation for nutrients (filtered or unfiltered) used in 1995 for the NWQL was chilling the samples, 

whereas all nutrients except orthophosphate were preserved with H2SO4 for samples collected for analysis 

by the ODEQ laboratory. In 2005, whole-water samples sent to the NWQL for analysis of total 

phosphorus and total nitrogen were also preserved with H2SO4. 

Data for water-quality field measurements and continuous monitors were collected and processed 

in accordance with USGS protocols (Wagner and others, 2006). Water temperature, dissolved oxygen, 

pH, and specific conductance were measured using multiparameter probes adapted for low-ionic strength 

waters. Calibration of these probes is discussed below in the Quality Assurance section. Data for field 

measurements were collected across the cross section of the stream to document representativeness of the 

measurements. On the basis of data from existing continuous water-quality monitors in the basin, located 

at BSODA and NURCR, together with data from Anderson and Carpenter (1998), the time of day 

targeted to measure dissolved oxygen and pH extremes was generally between 06:30 and 8:30 a.m. and 

between 3:00 and 7:00 p.m. Data in table 3 represent the daily minima and maxima, for which continuous 

data collection occurred by short-term deployments of multiparameter sondes. 

Discharge was measured according to standard USGS guidelines as described by Rantz and others 

(1982). Discharge records at continuous-record gaging stations were compiled according to methods 

described by Buchanan and Somers (1984) and Kennedy (1983). Flow data from two gaging stations 

(NUBWC and ROCKM) were obtained from Douglas County, which operated the gages (Brian Connors, 

Douglas County, written commun., 2006). Additional data for continuously measured discharge and 

water-quality parameters are available elsewhere (Herrett and others, 2005, 

http://waterdata.usgs.gov/or/nwis, and Douglas County Department of Natural Resources), and are not 

published here, with the exception of selected values measured during the period of study. 

Algae sampling 

Twelve quantitative algal samples were collected from 11 sites using methods described in 

Moulton and others (2002). At one site, NURCR, a replicate sample was collected for quality assurance. 

Algal samples at each site were collected from 10 representative rocks and composited into a single 

sample. Rocks were removed from wadeable portions of riffles or along stream margin habitats using the 

top rock scrape method described in Carpenter (2003). Round plastic pipe ends (PVC scribes) with 

outside diameters ranging from 4 to 10.4 centimeters were placed on each rock and algal material located 

outside the scribe was removed with a plastic-bristle brush and/or scraped off with a knife and discarded. 

The circular patch of algae remaining on the rock was scraped into a basin, and the material was rinsed 

into a sample bottle using stream water to produce algal samples with volumes ranging from 940 to 2,100 

milliliters. Algal samples were briefly homogenized in an electric blender and transferred into a 10-liter 

churn splitter, and subsamples were removed while churning for chlorophyll a (chl a), ash-free dry mass 

(AFDM), and species identification. Chl a and AFDM subsamples were collected onto glass-fiber filters 

(nominal pore size 0.7 micrometers) using a polypropylene filtration unit, wrapped in foil, sealed, packed 

7 
on dry ice, and sent to the ODEQ laboratory in Portland, Oregon, for fluorometric chl a and gravimetric 

AFDM analyses. Algal species identification samples were preserved with a 5% buffered formalin 

solution and shipped to the Academy of Natural Sciences of Philadelphia (ANSP) for taxon identification 

and enumeration following protocols described by Charles and others (2002). 

Quality Assurance 

The collection, preparation, and analysis of water-quality samples for this study included several 

quality assurance measures. A field replicate is a water sample collected at the same site and concurrently 

with (water sample) or immediately after (algal samples) the primary sample, as a measure of the 

precision of the laboratory analysis. The time of sampling for the field replicates was designated as 1 

minute later than the primary sample. Field replicate samples were collected at two sites (CLR2P and 

COPEG). The analyses by the ODEQ laboratory for the primary and field replicates had similar results for 

the constituents analyzed (table 3). 

Two equipment blanks were analyzed (from COPEG and NURCR) to determine if sample 

handling added contamination. There were nutrient detections for the equipment blanks (table 4), but 

those values were small compared to environmental concentrations. A transport blank showed no 

detection of any analyzed constituent (table 4), demonstrating that transporting the water-quality samples 

did not result in measurable contamination. 

On August 1, 2005, a reference sample, designed to test low-level nutrient analyses, was prepared 

at the USGS Oregon Water Science Center laboratory for blind submittal to the ODEQ laboratory. The 

reference sample contained known concentrations of nutrients from reagent-grade chemicals in an aliquot 

of water that was previously certified to be free of inorganic constituents at the microgram per gram level 

(Micelis Doyle, USGS, written commun., 2005). The DEQ laboratory results were similar to the expected 

concentrations for ammonia, total Kjeldahl nitrogen, total phosphorus, and dissolved orthophosphrous 

(table 4). The maximum relative difference was 13 percent, for total Kjeldahl nitrogen, and the analytical 

precision at the indicated concentrations was acceptable. 

Interlaboratory split samples were collected at BSODA on July 26 and at NURCR on July 27, 

2005. These samples were similar to a field replicate, but one of each pair of samples was instead sent to 

the USGS NWQL. The results of nutrient analysis by both laboratories were similar where detection 

levels were comparable (table 3). However, the detection levels of the NWQL for dissolved ammonia and 

nitrate were significantly higher that those provided by ODEQ, and the comparison is not valid for those 

constituents. Differences in unfiltered-water analysis of total phosphorus, total Kjeldahl nitrogen, 

dissolved orthophophosphate, and dissolved organic carbon were within acceptable limits. 

For measuring field parameters, the multiparameter probes were calibrated before and after use 

according to the manufacturer’s recommendations. Slight linear shifts were applied when differences after 

use exceeded 0.2°C, 0.2 mg/L of dissolved oxygen, 0.2 pH units, or 5% of the specific conductance 

standard. These shifts were equal to the difference between the expected value and the measured value. 

Data were not accepted if the shift would exceed 2.0°C, 2.0 mg/L of dissolved oxygen, 2.0 pH units, or 

30% of the specific conductance. 

8 
Results 

Click on a table number to open the PDF file, which will appear in the browser window. Use the 

Back button on the browser window to return to the report text. 

Water-Quality Samples and Field Measurements 

Table 3. Water-quality data and selected quality assurance data from the July 2005 synoptic sampling in 

the North Umpqua River Basin, Oregon 

Table 4. Quality assurance data from the July 2005 synoptic sampling in the North Umpqua River Basin, 

Oregon 

Table 5. Logged (10 minute interval) field parameter data from Lake Creek above Lemolo Lake (LAKEM, 

431750122104500), from July 25 at 17:10 to July 26 at 09:30 

Table 6. Logged (10 minute interval) field parameter data from North Umpqua River, Oregon, below 

Toketee Reservoir (TOKET, 431552122252100) from July 24 at 17:40 to July 25 at 16:00 

Table 7. Logged (10 minute interval) field parameter data from Steamboat Creek near Mouth (STEAM, 

14316700), North Umpqua River Basin, Oregon, from July 27 at 15:40 to July 28 at 11:30 

Table 8. Logged (10 minute interval) field parameter data from North Umpqua River, Oregon, near 

Steamboat Creek (NUSTM, 432034122442500), from July 28 at 18:50 to July 29 at 13:20 

Table 9. Vertical profile of pH, temperature, specific conductance, and dissolved oxygen in Lemolo 

Lake, North Umpqua River Basin, near the deep intake structure, July 29, 2005 

Table 10. Weather data (rainfall, temperature, barometric pressure) recorded in the upper North 

Umpqua River Basin, Oregon, July 25–29, 2005 

Table 11. Particulate carbon and nitrogen in whole water samples, July 2005 synoptic sampling in the 

North Umpqua River Basin, Oregon 

Algae 

Table 12. Biovolumes of algal taxa collected from 11 sites in the North Umpqua River Basin, Oregon, 

July 2005 

Table 13. Cell densities of algal taxa collected from 11 sites in the North Umpqua River Basin, Oregon, 

July 2005 

Table 14. Periphyton chlorophyll a, pheophytin a, and biomass from the July 2005 synoptic sampling in 

the North Umpqua River Basin, Oregon 

9 
References Cited 

American Public Health Association (APHA), 1992, Standard Methods of Water and Wastewater. 18th 

ed.: Washington D.C., American Public Health Association, American Water Works Association, 

Water Environment Federation. 

Anderson, C.W., and Carpenter, K.D., 1998, Water quality and algal conditions in the North Umpqua 

River Basin, Oregon, 1992-95, and implications for resource management: U.S. Geological Survey 

Water-Resources Investigations Report 98–4125, 78 p + plate 

(http://or.water.usgs.gov/pubs_dir/Abstracts/98-4125.html, accessed October 18, 2006). 

Buchanan, T.J., and Somers, W. P., 1984, Discharge measurements at gaging stations: U.S. Geological 

Survey Techniques of Water-Resources Investigations, book 3, chapter A8, 65 p. 

(http://pubs.usgs.gov/twri/twri3a8/, accessed October 18, 2006). 

Carpenter, K.D., 2003, Water-quality and algal conditions in the Clackamas River Basin, Oregon, and 

their relations to land and water management: U. S. Geological Survey Water-Resources Investigations 

Report 2002–4189, 114 p., (http://pubs.usgs.gov/wri/WRI02-4189/, accessed October 18, 2006). 

Charles, D.F., Knowles, C., and Davis, R.S., 2002, Protocols for the analysis of algal samples collected as 

part of the U.S. Geological Survey National Water-Quality Assessment Program: The Academy of 

Natural Sciences Patrick Center for Environmental Research—Phycology Section Report No. 02–06, 

124 p. (http://water.usgs.gov/nawqa/protocols/algprotocol/index.html, accessed July 19, 2006). 

Edwards, T.K., and Glysson, D.G., 1999, Field methods for measurement of fluvial sediment: U.S. 

Geological Survey Techniques of Water-Resources Investigations, book 3, chapter c2, 89 p. 

(http://pubs.usgs.gov/twri/twri3-c2/html/pdf.html, accessed October 18, 2006) 

Eilers, J.M., Eilers, B.J., and Kann, J., 2003, TMDL modeling and analysis of Diamond Lake, Oregon: 

Bend, Oregon, J.C. Headwaters, Inc., 103 p. 

(http://www.fs.fed.us/r6/umpqua/projects/projectdocs/diamondlkresto/diamondlkrestofeis/feis_web/feis_

appendices/Appendices/App_D_Aquatics/draft_tmdl_%20report.pdf (2.9 MB), accessed October 18, 

2006). 

Herrett, T.A., Hess, G.W., Stewart, M.A., Ruppert, G.P., and Courts, M.L., 2005, Water Resources Data 

for Oregon, Water Year 2005: U.S. Geological Survey Water Data Report OR-05-01, 

http://pubs.usgs.gov/wdr/2005/wdr-or-05, accessed October 18, 2006). 

Kennedy, E.J., 1983, Computation of continuous records of streamflow: U.S. Geological Survey 

Techniques of Water-Resources Investigations, book 3, chapter a13, 53 p. 

(http://pubs.usgs.gov/twri/twri3-a13/, accessed October 18, 2006). 

Moulton, S.R., II, Kennen, J.G., Goldstein, R.M., and Hambrook, J.A., 2002, Revised protocols for 

sampling algal, invertebrate, and fish communities as part of the National Water-Quality Assessment 

Program: U. S. Geological Survey Open-File Report 02–150, 75 p. 

(http://water.usgs.gov/nawqa/protocols/OFR02-150/index.html, accessed October 18, 2006). 

Oregon Department of Environmental Quality, 1998, Laboratory field sampling reference guide, Rev. 6.0: 

Portland, Oregon, 55 p. 

(http://www.deq.state.or.us/lab/qa/Field%20Sampling%20Reference%20Guide%2098%20v.%206.pdf

(1.5 MB), accessed October 18, 2006). 

10 
Oregon Department of Environmental Quality, 2004, Laboratory quality manual, Version 5: Portland, 

Oregon, DEQ91-LAB-0006-QMP, 63 p. 

.Oregon Department of Environmental Quality, 2006, The Umpqua Basin: 

(http://www.deq.state.or.us/WQ/TMDLs/UmpquaBasin.htm, accessed July 18, 2006). 

Rantz, S.E., and others, 1982, Measurement and computation of streamflow, Volumes 1 and 2: U.S. 

Geological Survey Water-Supply Paper 2175, 631 p. (http://pubs.usgs.gov/wsp/wsp2175/, accessed 

October 18, 2006). 

U.S. Environmental Protection Agency, 1983, Methods for chemical analysis of water and wastes: Report 

600/4-79-020, Revised 3/83, 552 p. 

U.S. Forest Service, 2004, Diamond Lake restoration project— Final environmental impact statement: 

Roseburg, Oregon, U. S. Forest Service, Umpqua National Forest, 

http://www.fs.fed.us/r6/umpqua/projects/projectdocs/diamondlkresto/, accessed October 18, 2006. 

Wagner, R.J., Mattraw, H.C., Ritz, G.F., and Smith, B.A., 2000, Guidelines and standard procedures for 

continuous water-quality monitors: station operation, record computation, and data reporting: U. S. 

Geological Survey Techniques and Methods 1—D3, 51 p. plus attachments 

(http://water.usgs.gov/pubs/wri/wri004252/, accessed October 19, 2006). 

Wilde, F.D., Radtke, D.B., Gibs, J., and Iwatsubo, R.T., 1999, Collection of water samples: U.S. 

Geological Survey Techniques of Water-Resources Investigations Book 9, chap. A4, 

http://pubs.water.usgs.gov/twri9A4/, accessed May 5, 2005 

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