U.S. ENVIRONMENTAL PROTECTION AGENCY NATIONAL EUTROPHICATION SURVEY WORKING PAPER SERIES REPORT ON OXBW RESEWOIR BAKER COUNTY, OREGON ADAMS GOUMY, IDAHO EPA REGION X WORKING PAPER No, 832 CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON and ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA ------- REPORT ON OXBOW RESEfMHR BAKER COUNTY, OREGON ADAMS GOIMIY, IDAHO EPA REGION X WORKING PAPER No, 832 WITH THE COOPERATION OF THE OREGON DEPARTMENT OF ENVIRONMENTAL QUALITY, THE IDAHO DEPARTMENT OF HEALTH AND WELFARE, AND THE OREGON NATIONAL GUARD M«CH, 1978 ------- CONTENTS Foreword i i List of Oregon Lakes and Reservoirs iv Lake or Reservoir Drainage Area Map v Secttons I, Conclusions 1 II . Drainage Basin Characteristics 4 III. Water Quality Summary 5 IV. Nutrient Loadings 9 V. Literature Reviewed . 13 VI. Appendices 14 ------- 11 FOREWORD The National Eutrophication Survey was initiated in 1972 in response to an Administration commitment to investigate the nation- wide threat of accelerated eutrophication to freshwater lakes and reservoirs. OBJECTIVES The Survey was designed to develop, in conjunction with state environmental agencies, information on nutrient sources, concentrations, and impact on selected freshwater lakes as a basis for formulating comprehensive and coordinated national, regional, and state management practices relating to point-source discharge reduction and non-point source pollution abatement in lake watersheds. ANALYTIC APPROACH The mathematical and statistical procedures selected for the Survey's eutrophication analysis are based on related concepts that: a. A generalized representation or model relating sources, concentrations, and impacts can be constructed. b. By applying measurements of relevant parameters associated with lake degradation, the generalized model can be transformed into an operational representation of a lake, its drainage basin, and related nutrients. c. With such a transformation, an assessment of the potential for eutrophication control can be made. LAKE ANALYSIS In this report, the first stage of evaluation of lake and water- shed data collected from the study lake and its drainage basin is documented. The report is formatted to provide state environmental agencies with specific information for basin planning [§303(e)J, water quality criteria/standards review [§303(c)j, clean lakes [§314(a,b)J, and water quality monitoring [§106 and §305(b)] activities mandated by the Federal Water Pollution Control Act Amendments of 1972. ------- Beyond the single lake analysis, broader based correlations between nutrient concentrations (and loading) and trophic condi- tion are being made to advance the rationale and data base for refinement of nutrient water quality criteria for the Nation's fresh water lakes. Likewise, multivariate evaluations for the relationships between land use, nutrient export, and trophic condition, by lake class or use, are being developed to assist in the formulation of planning guidelines and policies by EPA and to augment plans implementation by the states. ACKNOWLEDGEMENT The staff of the National Eutrophication Survey (Office of Research & Development, U. S. Environmental Protection Agency) expresses sincere appreciation to the Oregon Department of Environmental Quality and the Idaho Department of Health and Welfare for professional involvement and to the Oregon National Guard for conducting the tributary sampling phase of the Survey. William H. Young, Director; Harold L. Sawyer, Administrator, and the staff of the Water Quality Control Division of the Oregon Department of Environmental Quality; and the staff of the Division of Environment of the Idaho Department of Health and Welfare provided invaluable lake documentation and counsel during the Survey, reviewed the preliminary reports, and provided critiques most useful in the preparation of this Working Paper series. Brigadier General Richard A. Miller, the Adjutant General of Oregon, and Project Officer Lt. Colonel John Mewha, who directed the volunteer efforts of the Oregon National Guardsmen, are also gratefully acknowledged for their assistance to the Survey. ------- IV NATIONAL EUTROPHICATION SURVEY STUDY LAKES and RESERVOIRS STATE OF OREGON NAME COUNTY Brownlee Baker, OR; Washington, ID Diamond Douglas Hells Canyon Baker, Wallowa, OR; Adams, Idaho, ID Hills Creek Lane Owyh.ee Malhuor Oxbow . Baker, OR; Adams, ID Suttle Jefferson Waldo Lane ------- 11655 06A1/03A2 outlet OXBOW RESERVOIR <8> Tributary Sampling Site X Lake Sampling Site 1234 1 ScaTe 2 3 Mi \02 4455- Ore. Map Location 3B1 •^^f J06A2 Dam '"••\ Brownlee ?•'•''] Reservoir 4450- ------- OXBOW RESERVOIR STORE! NO. 4106 I. CONCLUSIONS A. Trophic Condition: Survey data indicate Oxbow Reservoir is eutrophic. It ranked sixteenth in overall trophic quality when the 21 Oregon and Idaho lakes and reservoirs sampled in 1975 were compared using a combination of six water quality parameters*. Seventeen of the water bodies had less median total phosphorus and dissolved orthophosphorus, all of the others had less median inorganic nitrogen, 13 had less mean chlorophyll a^, and 14 had greater mean Secchi disc transparency. Some depression of dissolved oxygen with depth occurred at stations 1 and 2 in August and September. Survey limnologists did not observe surface concentrations of algae; however, the relatively high chlorophyll a^ concen- tration at station 2 in April is indicative of a near-bloom con- dition (see page 7). B. Rate-Limiting Nutrient: The algal assay results are not considered representative of conditions in the reservoir at the time the samples were collected (09/15/75). The reservoir data indicate phosphorus limitation in April but nitrogen limitation in August and September. * See Appendix A. ------- 2 C. Nutrient Controllability: 1. Point sources—No known point sources directly impacted Oxbow Reservoir during the sampling year. However, those point sources contributing nutrients to upstream Brownlee Reservoir* probably affect Oxbow Reservoir as well, since 54% of the phos- phorus input to Brownlee Reservoir was not retained and entered Oxbow Reservoir. The sampling year phosphorus loading of 183.51 g/m2 is over 20 times that proposed by Vollenweider (Vollenweider and Dillon, 1974) as a eutrophic loading (see page 12). Although Vollenweider's model may not be applicable to water bodies with short hydraulic retention times, the trophic condition of Oxbow Reservoir is evidence of excessive nutrient loads. Any improvement in water quality would require minimization of the nutrient loads from both non-point sources and the point sources impacting upstream Brownlee Reservoir. 2. Non-point sources—As considered in this report, "non-point" sources include those contributing nutrients as a result of human activities (e.g., agricultural practices, urbanization, extractive processes, etc.) as well as natural sources (i.e., direct precipi- tation, leaf fall, wild birds and animals, etc.). The apparent non-point source phosphorus contribution accounted for all of the total phosphorus load during the sampling year. How- ever, as stated above, part of this load is attributable to point * Working Paper No. 827. ------- 3 sources further upstream. The Snake River contributed 99.0% of the total phosphorus load, and the Wildhorse River contributed 0.6%. The ungaged minor tributaries and immediate drainage contributed an esti- mated 0.4%. ------- II. RESERVOIR AND DRAINAGE BASIN CHARACTERISTICS7 A. Morphometry : 1. Surface area: 5.66 kilometers2. 2. Mean depth: 11.4 meters. 3. Maximum depth: 38.1 meters. 4. Volume: 64.758 x 106 m3. 5. Mean hydraulic retention time: 1 day. B. Tributary and Outlet: (See Appendix C for flow data) 1. Tributaries - Name Snake River Wildhorse River Minor tributaries & immediate drainage - Drainage area (km2)* 188,033.9 458.4 312.9 Totals 188,805.2 2. Outlet - Snake River C. Precipitation****: 1. Year of sampling: 27.0 centimeters. 2. Mean annual: 27.3 centimeters. Mean flow (m3/sec)* 526.270 4.920 1.470 532.660** 188,810.9*** 532.660 t Table of metric equivalents—Appendix B. tt McHugh, 1972; Martin and Hanson, 1966. * For limits of accuracy, see Working Paper No. 175, "...Survey Methods, 1973-1976". ** Sum of inflows adjusted to equal outflow. *** Includes area of reservoir. **** See Working Paper No. 175. ------- 5 III. WATER QUALITY SUMMARY Oxbow Reservoir was sampled three times during the open-water season of 1975 by means of a pontoon-equipped Huey helicopter. Each time, samples for physical and chemical parameters were collected from a number of depths at three stations on the reservoir (see map, page v). iDuring each visit, a single depth-integrated (4.6 m to surface) sample was composited from the stations for phytoplankton identification and enumeration; and during the September visit, a single 18.9-liter depth- integrated sample was collected from each of the stations for chlorophyll ^analysis. The maximum depths sampled were 29.3 meters at station 1, 34.7 meters at station 2, and 12.5 meters at station 3. The sampling results are presented in full in Appendix D and are summarized in the following table. ------- A. SUMMARY OF PHYSICAL AND CHEMICAL CHARACTERISTICS FOR STORET CODE 4106 OXBOH! RESERVOIR PARAMETER TEMP (C) OISS OXY (MG/L) CNDCTVY (MCROMO) PH (STAND UNITS) TOT ALK (MG/L) TOT P (MG/L) ORTHO P (MG/L) N02+N03 (MG/L) AMMONIA (MG/L) KJEL N (MG/L) INORG N (MG/L) TOTAL N (MG/L) CHLRPYL A (UG/D SECCHI (METERS) 1ST SAMPLING ( 4/ 3 SITES RANGE MEAN 6.9 - 7.6 7.3 15.2 - 15.6 15.5 237. - 247. 240. 8.4 - 8.5 8.5 129. - 134. 131. 0.074 - 0.087 0.080 0.024 - 0.051 0.036 0.640 - 0.660 0.645 0.040 - 0.060 0.052 0.300 - 0.500 0.385 0.680 - 0.720 0.697 0.940 - 1.150 1.030 13.3 - 23.0 18.0 0.5 - 0.8 0.7 9/75) 2ND SAMPLING ( 8/ 4/75) 3 SITES 3RD SAMPLING ( 9/15/75) 3 SITES MEDIAN 7.4 15.6 239. 8.4 131. 0.081 0.037 0.640 0.050 0.400 0.700 1.040 17.7 0.7 RANGE 17.7 2.8 233. 8.1 95. 0.036 0.012 0.160 0.020 0.200 0.180 0.460 3.4 0.4 - 23.9 9.2 - 281. 8.9 - 102. - 0.057 - 0.043 - 0.360 - 0.040 - 0.300 - 0.380 - 0.660 8.7 3.2 MEAN 20.3 6.0 257. 8.4 99. 0.048 0.032 0.300 0.027 0.250 0.327 0.550 5.7 2.3 MEDIAN 20.3 5.8 261. 8.4 101. 0.050 0.034 0.300 0.030 0.250 0.335 0.540 5.0 3.2 RANGE 20.9 4.0 417. 8.0 151. 0.065 0.063 0.670 0.020 0.200 0.690 0.890 6.1 2.4 - 21.8 8.6 - 426. 8.2 - 171. - 0.096 - 0.067 - 0.710 - 0.070 - 0.500 - 0.780 - 1.210 8.5 3.4 MEAN 21.2 4.9 420. 8.1 162. 0.074 0.065 0.691 0.023 0.269 0.714 0.960 7.2 2.7 MEDIAN 21.1 4.6 419. 8.1 166. 0.072 0.064 0.690 0.020 0.250 0.710 0.940 7.1 2.4 ------- B. Biological characteristics: 1. Phytoplankton - Sampling Date 04/09/75 08/04/75 09/15/75 Domi nant Genera 1. Stephanodiscus sp. 2. Asterionella sp/ 3. Melosira sp. 4. Surirella sp. 5. Chroomonas (?) sp. Other genera Total 1 . Fragilaria sp'. 2. Stephanodiscus S£. Total 1. Melosira SJD. 2. Cyclotella sp. 3. Cryptomonas sp. Algal Units „ per ml 5,621 300 257 '43 43 44 6,308 433 31 464 807 70 35 2. Chlorophyll a_ - Sampling Date 04/09/75 08/04/75 09/15/75 Total Station Number 1 2 3 1 2 3 1 2 3 912 Chlorophyll a 13.3 23.0 17.7 8.7 5.0 3.4 7.1 8.5 6.1 ------- 8 C. Limiting Nutrient Study: The algal assay results are not considered representative of conditions in the reservoir at the time the sample was col- lected (09/15/75) due to significant changes in the nutrient levels in the sample during shipment from the field to the laboratory. The reservoir data indicate phosphorus limitation in April and, nitrogen limitation in August and September. The mean inor- ganic nitrogen/orthophosphorus ratios in April were 14/1 or greater at'all stations and were 12/1 or less at all stations in August and September. ------- IV. NUTRIENT LOADINGS (See Appendix E for data) For the determination of nutrient loadings, the Oregon National Guard collected monthly near-surface grab samples from each of the tributary sites indicated on the map (page v), except for the high runoff month of February when two samples were collected. Sampling was begun in October, 1974, and was completed in September, 1975. Through an interagency agreement, stream flow estimates for the year of sampling and-a "normalized" or average year were provided by the Oregon District Office of the U.S. Geological Survey for the tributary sites nearest the reservoir. In this report, nutrient loads for sampled tributaries were determined by using a modification of a U.S. Geological Survey com- puter program for calculating stream loadings*. Nutrient loads for unsampled "minor tributaries and immediate drainage"1 ("ZZ" of U.S.G.S.) were estimated using the nutrient loads at station B-l, in kg/kmVyear, and multiplying by the ZZ area in km2. i No known wastewater treatment plants directly impacted Oxbow Reservoir during the sampling year.' * See Working Paper No. 175. ------- 10 A, Waste Sources: 1. Known municipal - None 2. Known industrial - None B. Annual Total Phosphorus Loading - Average Year: 1. Inputs - kg P/ % of Source yr total a. Tributaries (non-point load) - Snake River 1,023,210 98.5 Wildhorse River 9,075 0.9 b. Minor tributaries & immediate drainage (non-point load) - 6,260 0.6 c. Known municipal STP's - None. d. Septic tanks - None e. Known industrial - None - f. Direct precipitation* - 100 < O.t. Total 1,038,645 100.0 2., Outputs - Reservoir outlet - Snake River 895,060 3. Net annual P accumulation - 143,585 kg. * See Working Paper No. 175. ------- 11 C. Annual Total Nitrogen Loading - Average Year: 1. Inputs - kg N/ % of Source yr total a. Tributaries (non-point load) - Snake River 18,218,785 98.6 Wildhorse River 151,760 0.8 b. Minor tributaries & immediate drainage (non-point load) - 103,570 0.6 c. Known municipal STP's - None d. Septic tanks - None e. Known industrial - None f. Direct precipitation* - 6,110 < 0.1 Total 18,480,225 100.0 2. Outputs - Lake outlet - Snake River 25,222,530 3. Net annual N loss - 6,742,305 kg. D. Non-point Nutrient Export by Subdrainage Area: Tributary kg P/km2/yr kg N/km2/yr Snake River 5 97 Wildhorse River 20 331 * See Working Paper No. 175. ------- 12 E. Yearly Loads: In the following table, the existing phosphorus loadings are compared to those proposed by Vollenweider (Vollenweider and Dillon, 1974). Essentially, his "dangerous" loading is one at which the receiving water would become eutrophic or remain eutrophic; his "permissible" loading is that which would result in the receiving water remaining oligotrophic or becoming oligotrophic if morphometry permitted. A meso- trophic loading would be considered one between "dangerous" and "permissible". Note that Vollenweider's model may not be applicable to water bodies with short hydraulic retention times. Total Phosphorus Total Nitrogen Total Accumulated Total Accumulated grams/mVyr 183.51 25.37 3,265.1 loss* Vollenweider phosphorus loadings (g/m2/yr) based on mean depth and mean hydraulic retention time of Oxbow Reservoir: "Dangerous" (eutrophic loading) 9.00 "Permissible" (oligotrophic loading) 4.50 * There was an apparent loss of nitrogen during the sampling year. This may have been due to nitrogen fixation in the reservoir, solubilization of previously sedimented nitrogen, recharge with nitrogen-rich ground water, unsampled point sources discharging directly to the reservoir, or (probably) insufficient outlet sampling in relation to the very short hydraulic retention time of the reservoir. Whatever the cause, a similar nitrogen loss has occurred at Shagawa Lake, Minnesota, which has been intensively studied by EPA's former National Eutrophication and Lake Restoration Branch (Malueg et al., 1975). ------- 13 V. LITERATURE REVIEWED Malueg, Kenneth W., D. Phillips Larsen, Donald W. Schults, and Howard T. Mercier; 1975. A six-year water, phosphorus, and nitrogen budget for Shagawa Lake, Minnesota. Jour. Environ. Qual., vol. 4, no. 2, pp. 236-242. Martin, R. A. R., and Ronald L. Hanson, 1966. Reservoirs in the United States. Water Supply Paper No. 1838, U.S. Geol. Surv., Wash., DC. McHugh, Robert A., 1972. Interim study of some physical, chemical, and biological properties of selected Oregon lakes. OR Dept. of Environ. Qua!., Portland. Vollenweider, R. A., and P. J. Dillon, 1974. The application of the phosphorus loading concept to eutrophication research. Natl. Res. Council of Canada Publ. No. 13690, Canada Centre for Inland Waters, Burlington, Ontario. ------- VI. APPENDICES 14 APPENDIX A LAKE RANKINGS ------- LAKE DATA TO BE USED IN BANKINGS LAKE CODE LAKE NAME 1601 AMERICAN FALLS RESERVOIR 1603 CASCADE LAKE 1603 LAKE COEUR D'ALENE 1604 OWORSHAK RESERVOIR 1605 MAUSER 1606 HAYOEN LAKE 1607 ISLAND PARK RESERVOIR 1608 LAKE LOWELL 1609 MAGIC RESERVOIR I6lu PALISADES RESERVOIR 1611 LOWER PAYETTE 1612 LOwfER TWIN LAKES 1613 UPPER TWIN LAKES 4101 8ROWNLEE RESERVOIR 4102 DIAMOND LAKE 4103 HELLS CANYON RESERVOIR 4104 HILLS CREEK RESERVOIR 4105 O'-VYHEE 4106 OXBOW RESERVOIR 4107 SUTTLE LAKE 4108 WALDO LAKE MEDIAN TOTAL P 0.105 0.032 0.017 0.010 0.028 0.010 0.034 0.070 0.062 0.024 0.013 0.016 0.017 0.079 0.028 0.068 0.038 0.095 0.071 0.031 0.005 MEDIAN INORG N 0.080 0.060 0.040 0.080 0.075 0.040 0.050 0.070 0.130 0.080 0.060 0.050 0.045 0.560 0.040 0.640 0.060 •0.425 0.690 0.04Q 0.040 500- MEAN SEC 463.800 415.067 380.348 401.866 366.286 243.500 391.778 477.111 400.750 345.428 234.000 370.000 369.143 428.133 294.500 429.111 435.200 480.417 425.555 95.000 -100.000 MEAN CHLORA 15.379 8.081 10.391 2.420 11.112 2.787 9.322 25.389 7.322 2.067 4.600 2.318 34.962 16.207 7.300 18.722 2.333 3.350 10.311 9.167 0.350 15- MIN DO 14.700 14.600 12.200 7.^00 14.800 11.800 12.800 14.600 14.700 12.800 9.600 13.600 8.200 14.500 6.800 12.400 7.400 13.200 12.200 6.800 6.800 MEu>I OISS OKI 0.035 0.009 O.OOb 0.009 0.013 0.003 0.012 0.015 0.020 0.007 0.007 0.009 0.0 Of 0.0<+3 0.011 0.045 0.027 0.064 0.040 0.020 G.OG6 ------- PERCENT or LAKES WITH HIGHER VALUES (NUMBER OF LAKES WITH HIGHER VALUES) LAKE" CODE LAKE NAME 1601 AMERICAN FALLS RESERVOIR 1602 CASCADE LAKE 1603 LAKE COEUfi O'ALENE 1604 OWORSHAK RESERVOIR 1605 HAUSER 1606 HAYDEN LAKE 1607 ISLAND PARK RESERVOIR 1608 LAKE LOWELL 1609 MAGIC RESERVOIR 1610 PALISADES RESERVOIR 1611 LOWER PAYETTE 1612 LOWER TWIN LAKES 1613 UPPER TWIN LAKES 4ioi BROWNLEE: RESERVOIR 4102 DIAMOND LAKE 4103 HELLS CANYON RESERVOIR 4104 KILLS CREEK RESERVOIR 410'5 OWYHEE 4106 OXBOW RESERVOIR 4107 SUTTLE LAKE 4108 WALOlPLAKE MEDIAN TOTAL P 0 ( 0) ' 45 ( 75 ( 93 ( 58 ( 93 ( 40 ( 20 < 30 < 65 ( 85 < 80 ( 70 ( 10 ( 58 ( 25 ( 35 < 5 ( 15 < 50 ( 100 ( 9) 15) 18) ID 18) 8) 4) 6) 13) 17) 16) 14) 2) 11) 5) 7) 1) 3) 10) 20) MEDIAN INORG N 30 ( 5) 58 1 93 1 30 i 40 < 93 1 68 1 45 1 20 1 30 1 58 I 68 1 75 1 10 < 93 1 5 1 50 1 15 1 0 I 80 ( 93 < I 11) ; 17) [ 5) [ 8) : 17) ! 13) ; 9) ! 4) 1 S) I 11) [ 13) ! 15) I 2) ! 17) [ 1) I 10) : 3) ; o) [ 16) ! 17) 500- MEAN SEC 10 ( 2) 35 ( 55 < 40 ( 70 ( 85 ( 50 ( 5 ( 45 ( 75 ( 90 ( 60 ( 65 ( 25 ( 80 < 20 ( 15 ( 0 ( 30 ( 95 ( 100 ( 7) 11) 8) 14) 17) 10) 1) 9) 15) 18) 12) 13) 5) 16) 4) 3) 0) 6) 19) 20) MEAN CHLORA 20 ( 4) 50 30 80 25 75 40 5 55 95 65 90 0 15 60 10 85 70 35 45 100 ( 10) ( 6) ( 16) ( 5) ( 15) < 8) ( 1) < ID < 19) ( 13) ( 18) ( 0) ( 3) ( 12) ( 2) ( 17) ( 14) ( 7) ( 9) ( 20) 15- MEDIAN MIN 00 DISo OKTMO P 13 (2) 20 ( 4) 3 ( 58 ( 83 < 3 < 65 ( 43 ( 20 ( 13 ( 43 ( 70 ( 30 ( 75 ( 25 ( 95 ( 50 ( 83 ( 35 ( 58 ( 95 ( 95 ( 0) 11) 16) 0) 13) 8) 4) 2) 8) 14) 6) 15) 5) 18) 10) 16) 7) ID 18) 18) 65 ( 90 ( 65 ( 45 ( 100 ( 50 ( 40 ( 30 ( 80 ( 75 ( 65 ( 95 ( 10 ( 55 ( 5 ( 25 ( , 0 < 15 ( 35 ( 85 ( 12) 18) 12) 9) 20) 10) 8) 6) 16) 15) 12) 19) 2) 11) 1) 5) 0) 3) 7) 17) IND£X NO i 93 i 256 401 391 241 511 291 135 193 388 4-f3 393 380 *5 441 115 2*3 125 lo3 400 573 ------- LAKES RANKED BY INDEX NOS. RANK LAKE CODE LAKE NAME INDEX NO 1 4103 WALDO LAKE 573 2 1606 HAYOElM LAKE 511 3 1611 LOWER PAYETTE 443 4 4102 DIAMOND LAKE 441 5 1603 LAKE COEUR O'ALENE 401 6 4107 SUTTLE LAKE 4CO 7 1612 LOWER TWIN LAKES 393 s 1604 DW/ORSHAK RESERVOIR 391 9 i6io PALISADES RESERVOIR 388 10 1613 UPPER TWIN LAKES 380 11 4104 HILLS CREEK R£SERv6lR 293 12 1607 ISLAND PARK RESERVOIR 291 13 1602 CASCADE LAKE ?56 14 1605 HAUSER 241 15 1609 MAGIC RESERVOIR 193 16 4106 OXBOW RESERVOIR 153 17 1608 LAKE LOWELL 135 18 4105 OWYHEE - 125 19 4103 HELLS CANYON RESERVOIR '115 20 4101 8ROWNLEE RESERVOIR 95 21 1601 AMERICAN PALLS RESERVOIR 93 ------- APPENDIX B CONVERSION FACTORS ------- CONVERSION FACTORS - Hectares x 2.471 = acres Kilometers x 0.6214 = miles. Meters x 3.281 = feet Cubic meters x 8.107 x 10 "^ = acre/feet Square kilometers x 0.3861 = square miles Cubic meters/sec x 35.315 - cubic feet/sec Centimeters x 0.3937 = inches Kilograms x 2.205 = pounds Kilograms/square kilometer x 5.711 = Ibs/square mile ------- APPENDIX C TRIBUTARY FLOW DATA ------- TRIdUTAkY FLOW INFORMATION FOR OREGON 08/11/76 LAKE CODE 4106 ox BOW RESERVOIR TOTAL DRAINAGE AREA OF LAKE(SO KM) 188810.9 FE8 MAR APR SUB-DRAINAGE TRIBUTARY AREAfSQ KM) JAN MAY NORMALIZED FLOWS(CMS) JUN JUL AUG SEP OCI NOV UEC MEAN 4106A1 4106A2 4106H1 4106ZZ 188810.9 188033.9 458.4 89.1 597.V* 713.58 676.77 716.42 634.30 620.14 336.97 325.64 396.44 447.41 444.57 501.21 532.66 594.65 710.75 671.11 707.92 2.27 2.1> 5.10 6.51 0.42 0.51 0.68 0.79 614.48 15.57 2.41 600 15 1 .32 .57 .42 331.31 4.25 0.68 322.61 1.42 0.23 396.44 0.99 0.17 444.57 1.42 0.20 441 2 0 .74 .27 .23 498.38 1.42 0.23 526.27 4.92 0.66 SUMMARY TOTAL DRAINAGE AREA OF LAKE = SUM OF SUB-DRAINAGE AREAS = 188810 188581 .9 .4 TOTAL FLOW IN = TOTAL FLOW OUT = 6401. 6410. 27 92 MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS) TRIBUTARY MONTH YEAR MEAN FLOW DAY 4106A1 FLOW DAY FLOW DAY FLOW 4106A2 10 11 1? 1 ? 3 4 5 6 7 a 9 10 11 12 1 ? 3 4 5 6 7 8 9 74 74 74 75 75 75 75 75 75 75 75 75 74 74 74 75 75 75 75 75 75 75 75 75 501.208 495.545 523.862 614.476 719.248 877.822 1268.595 1347.882 733.406 413.426 328.475 444.574 498.376 492.713 523.862 614.476 719.248 872.159 1260.100 1328.060 719.243 407.762 325.644 444.574 19 23 14 4 9 9 13 17 7 9 28 19 23 14 4 9 9 13 17 7 9 28 410.594 521.030 538.020 620.139 25 569.168 22 897.644 1155.327 82.119 744.733 311.485 430.416 410.594 521.030 538.020 617.307 25 569.168 22 889.149 1149.664 51.537 722.080 308.654 430.416 656.951 894.812 656.951 891.980 ------- TRIBUTARY FLOW INFORMATION FOR OREGON 08/11/76 LAKE CODE 4106 OX BOW RESERVOIR MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS) TRIBUTARY MONTH YEAR MEAN FLOW DAY 4106B1 10 11 12 1 ? 3 4 5 6 7 8 9 74 74 74 75 75 75 75 75 75 75 75 75 FLOW DAY 0.850 0.566 0.623 0.708 1.416 5.360 5.947 17.556 12.743 4.531 1.076 0.793 19 23 14 4 9 9 13 17 7 9 28 0.906 0.623 0.623 0.623 0.991 8.495 5.663 25.485 18.406 0.708 0.566 25 22 FLOW DAY 0.850 1.189 FLOW ------- APPENDIX D PHYSICAL and CHEMICAL DATA ------- STORET RETRIEVAL DATE 76/08/12 410^01 44 58 07.0 116 50 02.0 3 OXBOW RESERVOIR 41001 OREGON 130892 11EPALES 2111202 0064 FEET DEPTH CLASS 00 DATE FROM TO 75/04/09 75/08/04 75/09/15 DATE FROM TO 75/04/09 75/08/0*. 75/09/15 TIME DEPTH OF DAY FEET 10 00 0000 10 00 0005 10 00 0015 10 00 0035 10 00 0060 09 00 0000 09 00 0005 09 00 0015 09 00 0035 09 00 0070 09 00 0096 15 00 0000 15 00 0005 15 00 0015 15 00 0035 15 00 0065 15 00 0096 TIME DEPTH OF DAY FEET 10 00 0000 10 00 0005 10 00 0015 10 00 0035 10 00 0060 09 00 0000 09 00 0005 09 00 0015 09 00 0035 09 00 0070 09 00 0096 15 00 0000 15 00 0005 15 00 0015 15 00 0035 15 00 0065 15 00 0096 00010 WATER TEMP CENT 6.9 7.1 7.1 7.0 7.0 23.9 22.2 21.1 20.6 20.0 19.2 21.6 21.0 21.0 20.9 20.9 20.9 00665 PHOS-TOT MG/L P 0.087 0.084 0.074 0.079 0.079 0.036 0.040 0.040 0.042 0.051 0.055 0.073 0.069 0.071 0.072 0.096 0.085 00300 00077 00094 00 TRANSP CNDUCTVY SECCHI FIELD MG/L INCHES MICROMHO 15.4 27 15.6 15.2 15.6 15.4 9.2 126 7.6 5.6 6.0 4.8 5.8 5.6 96 8.6 4.5 4.2 4.3 4.0 32217 00031 CHLRPHYL INCDT LT A REMNING UG/L PERCENT 13.3 8.7 7.1 247 239 239 240 243 281 275 269 265 249 241 426 419 417 417 417 420 00400 PH SU 8. 8. 8. 8. 8. a. 8. 8. 8. 8. 8. 8. 8. 8. 8. 8. 8. SO 45 40 45 45 90 70 40 35 15 65 20 10 10 10 10 10 00410 00610 00625 00630 00671 T ALK NH3-N TOT KJEL N02&N03 PHOS-DIS CAC03 TOTAL N N-TOTAL ORTHO MG/L MG/L MG/L MG/L MG/L P 132 131 130 129 129 101 102 102 101 97 96 167 166 165 165 166 166 0.050 0.040 0.050 0.040 0.050 0.020 0.030 0.030 0.020 0.030 0.030 0.020K 0.020K 0.020K 0.020K 0.070 0.020K 0.400 0.400 0.400 0.400 0.400 0.300 0.300 0.300 0.200 0.200 0.300 0.200 0.200 0.200 0.200 0.500 0.200 0.650 0.640 0.640 0.640 0.640 0.160 0.240 0.280 0.300 0.320 0.350 0.690 0.700 0.700 0.710 0.710 0.710 0.033 0.037 0.042 0.039 0.040 0.012 0.019 0.027 0.029 0.034 0.037 0.067 0.065 0.066 0.066 0.066 0.067 K VALUE KNOWN TO BE LESS THAN INDICATED ------- STORE! RETRIEVAL DATE 76/08/12 410602 44 56 10.0 116 49 58.0 3 OXttOw RESERVOIR 41001 OREGON 130892 11EPALES 2111202 0094 FEET DEPTH CLASS 00 DATE FROM TO 75/04/09 75/08/04 75/09/15 DATE FROM TO TIME DEPTH OF DAY FEET 10 25 0000 10 25 0005 10 25 0015 10 25 0050 10 25 0090 09 30 0000 09 30 0005 09 30 0015 09 30 0030 09 30 0060 09 30 0090 09 30 0114 15 20 0000 15 20 0005 15 20 0015 15 20 0035 15 20 0070 15 20 0101 TIME DEPTH OF DAY FEET 00010 WATER TEMP CENT 7.2 7.5 7.5 7.4 7.4 21.7 21.7 21.0 20.8 19.9 19.5 19.5 21.8 21.5 21.3 21.1 21.1 21.1 00665 PHOS-TOT MG/L P 00300 DO MG/L 15.6 15.6 15.6 15.4 15.6 8.0 4.4 3.0 2.8 7.0 5.3 5.2 5.1 4.9 4.6 4.5 32217 CHLRPHYL A UG/L 00077 00094 TRANSP CNDUCTVY SECCHI FIELD INCHES MICROMHO 30 239 239 238 239 239 126 273 275 270 265 257 247 247 96 423 423 419 418 418 419 00031 INCDT LT REMNING PERCENT 00400 PH SU 8. 8. 8. 8. 8. a. 8. 8. 8. 8. 8. 8. 8. 8. 8. 8. 8. 8. 50 50 50 45 45 60 60 40 35 20 10 55 20 20 20 10 10 00 00410 T ALK CAC03 MG/L 129 130 129 134 132 101 101 100 97 99 99 101 165 166 169 169 171 154 00610 00625 NH3-N TOT KJEL TOTAL Mii/L 0.060 0.050 0.060 0.060 0.050 0.030 0.040 0.040 0.030 0.030 0.020 0.030 0.020K 0.020K 0.020K 0.020K 0.020K 0.020K N MG/L 0.300 0.400 0.400 0.300 0.400 0.300 0.300 0.200K 0.200 0.200 0.200 0.200 0.200 0.200 0.200 0.300 0.300 0.400 00630 N02&N03 N-TOTAL MG/L 0.650 0.640 0.650 0.660 0.650 0.280 0.270 0.300 0.330 0.330 0.340 0.300 0.690 0.690 0.690 0.670 0.690 0.690 00671 PHOS-DIS OHTHO MG/L P 0.041 0.044 0.051 0.033 0.028 0.034 0.037 0.039 0.036 0.035 0.035 0.030 0.063 0.063 0.063 0.064 0.065 0.067 K VALUF KNOWN TO BF 75/04/09 75/08/04 75/09/15 10 25 0000 10 25 0005 10 25 0015 10 25 0050 10 25 0090 09 30 0000 09 30 0005 09 30 0015 09 30 0030 09 30 0060 09 30 0090 09 30 0114 15 20 0000 15 20 0005 15 20 0015 15 20 0035 15 20 0070 15 20 0101 0.081 0.082 0.085 0.081 0.081 0.042 0.043 0.041 0.055 0.051 0.051 0.057 0.071 0.073 0.076 0.074 0.078 0.085 23.0 5.0 8.5 LESS THAN INDICATED ------- STORET RETRIEVAL DATE 76/08/12 DATE FROM TO 75/04/09 75/08/04 75/09/15 TIME OF DAY 11 00 11 00 11 00 10 05 10 05 10 05 16 40 16 40 16 40 16 40 DEPTH FEET 0000 0005 0015 0000 0005 0013 0000 0005 0017 0041 tfATER TEMP CENT 7.5 7.6 7.4 17.7 17.8 17.8 21.2 21.2 21.2 21.2 410603 44 51 23.0 116 53 25.0 3 OXBOW RESERVOIR 41001 OREGON 130892 11EPALES 2111202 0019 FEET DEPTH CLASS 00 00010 ATER TEMP CENT 7.5 7.6 7.4 17.7 17.8 17.8 21.2 21.2 21.2 21.2 00300 DO MG/L 15.6 15.2 15.2 8.8 5.4 5.8 4.6 4.6 4.6 4.5 00077 TRANSP SECCHI INCHES 20 17 132 00094 CNDUCTVY FIELD M1CROMHO 237 237 238 233 235 233 420 420 421 419 00400 PH SU 8.45 8.45 8.50 8.55 8.20 8.10 8.15 8.20 8.20 8.10 00410 T ALK CAC03 MG/L 131 132 132 102 97 95 153 154 151 151 00610 NH3-N TOTAL MG/L 0.050 0.060 0.050 0.020 0.020 0.020 0.020K 0.020K 0.020K 0.020K 00625 TOT KJEL N MG/L 0.500 0.300 0.400 0.300 0.300 0.200 0.300 0.300 0.300 0.300 00630 N02«*N03 N-TOTAL MG/L 0.650 0.640 0.640 0.280 0.360 0.360 0.680 0.680 0.680 0.680 00671 PHOS-OIS ORTHO MG/L P 0.024 0.029 0.026 0.025 0.042 0.043 0.063 0.063 0.064 0.063 DATE FROM TO 75/04/09 75/08/04 75/09/15 TIMF DEPTH OF DAY FEET 11 00 0000 11 00 0005 11 00 0015 10 05 0000 10 05 0005 10 05 0013 16 40 0000 16 40 0005 16 40 0017 16 40 0041 00665 PHOS-TOT MG/L P 0.076 0.075 0.079 0.049 0.053 0.056 0.068 0.065 0.065 0.067 32217 CHLRPHYL A UG/L 17.7 3.4 6.1 00031 INCDT LT REMNING PERCENT K VALUE KNOWN TO BE LESS THAN INDICATED ------- APPENDIX E TRIBUTARY DATA ------- STOfiET RETRIEVAL DATE 76/08/12 DATE TIME DEPTH N02&N03 FROM OF TO DAY FEET 74/10/19 12 50 74/11/23 12 30 75/01/25 14 22 75/02/09 14 50 75/02/22 15 35 75/05/17 14 00 75/06/07 13 00 75/08/09 75/09/28 11 00 4106A1 44 58 30.0 116 51 15.0 4 SNAKE RIVER 41 15 COPPERFIELO 0/OX BOW RESERVOIR 130892 BRDG BELOW OXBOW POWERHOUSE 11EPALES 2111204 0000 FEET DEPTH CLASS 00 0630 I&N03 OTAL IG/L 0.800 0.960 0.810 0.750 0.720 0.070 0.055 0.300 0.620 00625 TOT KJEL N MG/L 1.400 0.400 0.500 1.100 0.400 0.750 1.300 1.850 0.500 00610 NH3-N TOTAL MG/L 0.055 0.035 0.056 0.072 0.044 0.030 0.030 0.050 0.025 00671 PHOS-DIS ORTHO MG/L P 0.065 0.050 0.016 0.024 0.016 0.010 0.010 0.030 0.050 00665 PHOS-TOT MG/L P 0.075 0.050 0.030 0.050 0.040 0.090 0.060 0.060 0.070 ------- STORET RETRIEVAL OA1E 7b/6s/i3 DATE TIME DEPTH N02&N03 FROM OF TO DAY FEET 74/10/19 74/11/33 74/13/14 75/02/09 75/02/22 75/03/09 75/04/13 75/05/17 75/06/07 75/09/28 14 30 12 00 13 30 11 15 12 00 12 00 10 55 11 35 12 25 4106A2 44 50 45.0 116 53 45.0 4 SNAKE RIVER 41 15 COPPERFIELD T/OX BOW RESERVOIR 130892 PVD HWY BRDG .4 MI N OF BROKNLEE 0AM 11EPALES 2111204 0000 FEET DEPTH CLASS 00 0630 &N03 OTAL IG/L 0,800 0.950 0.990 0.760 0.720 0.825 0.500 0.060 0.050 0.640 00625 TOT KJEL N MG/L 0.600 0.400 0.700 0.600 0.400 1.100 1.850 1.630 0*550 1.000 00610 NH3-N TOTAL MG/L 0.065 0.075 0.060 0.056 0.056 0.044 0.055 0.045 0.040 0.045 00671 PHOS-DIS ORTHO MG/L P 0.060 0.045 0.045 0.016 0.016 0.024 0.020 0.015 0.010 0.060 00665 PHOS-TOT MG/L P 0.070 0.045 0.050 0.050 0.040 0.070 0.080 0.080 0.050 0.090 ------- STORET RETRIEVAL DATE 76/08/12 DATE TIME DEPTH N02&N03 FROM OF TO DAY FEET 74/10/19 74/11/23 74/12/14 75/01/04 75/01/25 75/02/09 75/02/22 75/03/09 75/04/13 75/05/17 75/06/07 75/09/28 14 15 11 45 13 06 11 00 10 55 11 00 12 05 12 04 10 45 11 30 12 20 410681 44 51 15.0 116 53 30.0 4 WlLDHORSE RIVER 41 15 COPPERFIELD T/OX BOW RESERVOIR 130892 BRDG .4 MI N OF ADAMS/WASH CO LINE 11EPALES 2111204 0000 FEET DEPTH CLASS 00 0630 &N03 OTAL IG/L 0.040 0.016 0.056 0.096 0.088 0.152 0.232 0.297 0.105 0.070 o.oao 0.045 00625 TOT KJEL N MG/L 0.600 0.200 0.300 0.700 0.700 0.600 0.100 0.700 1.050 0.850 1.050 0.600 00610 NH3-N TOTAL MG/L 0.025 0.030 0.010 0.020 0.016 0.040 0.012 0.032 0.020 0.080 0.015 0.015 00671 PHOS-DIS ORTHO MG/L P 0.015 0.015 0.015 0.028 0.016 0.016 0.016 0.024 0.025 0.025 0.015 0.010 00665 PHOS-TOT MG/L P 0.020 0.020 0.020 0.040 0.020 0.030 0.020 0.070 0.080 0.050 0.050 ------- |