Precipitation-Runoff and Streamflow-Routing Models for the ...

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122˚15´ 122˚00´121˚52´30´´44˚37´30´´River141740000 5 10 MILES0 5 10 KILOMETERSALBANY314174000RM 119.3RM 119.5Calapooia RiverMarys RiverRM 132.5RM 132.1Muddy River30´WillametteMuddyWillametteRiver2RM 143.5Lake CreekLong Tom414170000River 32 RM 145.91Ingram SloughRM 154.1Lake CreekHARRISBURG114166000RM 161.0CreekIngram15´Slough1416600014174000RM 115.5EXPLANATIONTributary inflowStream-gaging station andU.S. Geological Surveyidentification numberRiver mile—measured from themouth of Willamette River44˚07´30´´11Model junction numberModel branch numberBase from U.S. Geological Survey digital data, 1:100,000, 1978-84Universal Transverse Mercator projection, Zone 10Figure 31. Willamette River and tributary basins from Harrisburg to Albany, Oregon, and schematic diagram of thestream network.Figure 32 shows results of routing the input flow41.9 miles downstream where it can be compared toobserved flow at the Willamette River at Albanystream-gaging station (14174000). PRMS was usedto simulate 1,029 mi 2 of intervening drainage area(21 percent of the basin). Results of statistical analysesfor calibration and verification time periods indicateabsolute errors of 5.4 and 5.3 percent, respectively,with a bias of about -1.4 percent (table 12).Willamette River from Albany to SalemThe mapped and schematized Willamette Riverfrom Albany to Salem stream network is shown onfigure 33. For this reach, the Willamette River is schematizedas a three-branch network with eight tributaryinflows. A discharge hydrograph constituted from datacollected at the USGS stream-gaging station on theWillamette River at Albany (14174000) at RM 119.3was used as the upstream boundary input. Subbasinhydrographs for four minor tributaries and two majortributaries were simulated by PRMS modeling andinput to the Willamette WDM file. Inflow data for twodiversions from the North Santiam River (SydneyDitch and part of Pringle Creek flow) were estimatedfrom State and local drainage district records. Thesehydrographs were input to the appropriate grid locationsfor DAFLOW modeling. In one branch, flow wasrouted from the observed flow at the Santiam River atJefferson (14189000) downstream 9.6 miles.Figure 34 shows results of routing the inputflow 35.2 miles downstream, where it can be comparedto observed flow at the Willamette River at Salemstream-gaging station (14191000). PRMS was used to54
1,000ObservedSimulatedDISCHARGE, IN THOUSANDS OF CUBIC FEET PER SECOND100101O N D J F M A M J J A S O N D J F M A M J J A S1973 1974WATER YEARFigure 32. Observed and simulated discharge from combined Precipitation-Runoff Modeling System and DiffusionAnalogy Flow modeling for Willamette River at Albany, Oregon (stream-gaging station 14174000), 1973–74 wateryears. (See Glossary for program descriptions.)simulate 650 mi 2 of intervening drainage area (9 percentof the basin). Absolute error for the calibrationand verification time periods was 3.2 and 3. 9 percent,respectively, and bias was nearly zero (table 12).Willamette River from Salem to Willamette FallsThe mapped and schematized Willamette Riverfrom Salem to Willamette Falls stream network isshown on figure 35. For this reach, the WillametteRiver was schematized as a two-branch network withnine tributary inflows. Flow hydrographs for themouth of the Yamhill River and the mouth of theMolalla River were simulated and input to the WillametteWDM file. A discharge hydrograph fromobserved data at the USGS stream-gaging station onthe Willamette River at Salem (14191000) at RM 84.1was used as the upstream boundary input. Subbasinhydrographs for six minor tributaries were simulatedby PRMS modeling and input to the Willamette WDMfile. Data for a diversion from the North Santiam River(part of the Mill Creek flow) was estimated from Stateand local drainage district records. A discharge hydrographfrom observed data at the USGS stream-gagingstation on the Tualatin River at West Linn (14207500)was used as tributary input from the WDM file. Thesehydrographs were input to the appropriate grid locationsfor DAFLOW modeling.Figure 36 shows results of routing the input flow45.6 miles downstream, where it can be compared to55
Page 1:
Precipitation-Runoff and Streamflow
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U.S. DEPARTMENT OF THE INTERIORBRUC
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Determining Travel Time and Dilutio
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2. Stream-gaging stations used to c
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network-routing models where availa
Page 14 and 15: made on the main stem at base-flow
Page 16 and 17: Figure 1. Willamette River Basin, O
Page 18 and 19: EvapotranspirationINPUTSAirtemperat
Page 20 and 21: Table 1. Climate stations used to c
Page 22 and 23: Table 2. Stream-gaging stations use
Page 24 and 25: Figure 4. Mean annual precipitation
Page 26 and 27: Major Land Use MapHydrologic Soil G
Page 28 and 29: 0.5 mi 2 , created in the merge of
Page 30 and 31: Table 6. Geology and soils matrix o
Page 32 and 33: tion value of the HRU class by the
Page 34 and 35: Table 8. Selected monthly basinwide
Page 36 and 37: Figure 9. Location of Precipitation
Page 38 and 39: Table 11. Statistical analyses of P
Page 40 and 41: flow can become a significant compo
Page 42 and 43: diffusion at selected grid interval
Page 44 and 45: samples were collected at various d
Page 46 and 47: 3,0002,500June 21-30, 1993September
Page 48 and 49: stream network is shown on figure 1
Page 50 and 51: 122˚30´ 15´122˚00´121˚45´Roc
Page 52 and 53: 123˚22´30´´ 123˚15´ 123˚00´
Page 54 and 55: 123˚00´´ 45´30´122˚15´45˚15
Page 56 and 57: YamhillRiver123˚45´ 30´ 15´123
Page 58 and 59: 123˚07´30´´ 123˚00´ 45´ 30´
Page 60 and 61: 123˚07´30´´ 123˚00´ 45´ 30´
Page 62 and 63: 44˚15´14166000122˚07´30´´Will
Page 66 and 67: 44˚52´30´´45´122˚15´ 122˚00
Page 68 and 69: observed flow at the Willamette Riv
Page 70 and 71: DAFLOW model, and peak amplitude is
Page 72 and 73: 20DYE CONCENTRATION, IN MICROGRAMS
Page 74 and 75: ARC-INFO and Geographic Information
Page 76 and 77: WILL.WDMData-base file(Observed pre
Page 78 and 79: WILL.WDMData-base fileSWSTATSFreque
Page 80 and 81: Jobson, H.E., 1980, Comment on A ne
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Page 84 and 85: APPENDIX 1. STREAM GEOMETRY FOR MAI
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APPENDIX 2. ARC MACRO LANGUAGE (AML
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APPENDIX 3. DEFINITIONS OF PARAMETE
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APPENDIX 3. DEFINITIONS OF PARAMETE
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APPENDIX 4. MEASUREMENTS USED TO DE
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APPENDIX 5. EXAMPLE PRECIPITATION-R
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APPENDIX 5. EXAMPLE PRECIPITATION-R
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APPENDIX 6. DIFFUSION ANALOGY FLOW
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APPENDIX 7. PROGRAMMING STEPS TO IN
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APPENDIX 8. PROGRAMMING STEPS TO DE
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150Climatemaxtempmintempprecipitati
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APPENDIX 10. DIRECTORY TREE AND DES
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APPENDIX 11. DIRECTORY TREES AND DE
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APPENDIX 11. DIRECTORY TREES AND DE
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APPENDIX 12. DIRECTORY FOR will.wdm
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APPENDIX 13. PROGRAMMING STEPS FOR
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APPENDIX 14. INPUT FILES FOR BRANCH
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