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

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123˚07´30´´ 123˚00´ 45´ 30´15´122˚00´´121˚45´´45˚30´45˚15´River1416550014165000MohawkCampCreekMcKenzieRiverGateCreek14162500MarinCreek45˚00´0 5 10 15 20 MILES0 5 10 15 20 KILOMETERSBase from U.S. Geological Survey digital data, 1:100,000, 1978-84Universal Transverse Mercator projection, Zone 1014165500RM 2.81EXPLANATIONTributary inflowDiversion (outflow)Stream-gaging station andU.S. Geological Surveyidentification numberRiver mile—measured fromthe mouth of McKenzieRiverModel junction numberLeaburg7 Walterville 667.5 16.626.634.75 4 3 25 RM RM 4 3 RM 21 RM14165000CanalCanalRM2.8RM RMRMRM13.7 20.732.041.4Canterbury Creek14165500RM 7.1UnnameddrainageMohawkRiverCamp CreekUnnameddrainageOsborn CreekHolden CreekMcKenzie1 Model branch numberFigure 27. McKenzie River Basin, Oregon, and schematic diagram of the stream network.Ritchie CreekRiverGate CreekRM44.3Marin Creek114162500RM 47.7River is schematized as a seven-branch network, withtwo of those branches as parallel canals that normallycarry about 40 percent of the flow. Eleven tributariesflow into the network. The parallel canals are forpower production and are operated by EWEB. Dischargehydrographs from observed data at the USGSstream-gaging station on the McKenzie River at Vida(14162500) at RM 47.7 were used as the upstreamboundary input. Subbasin hydrographs for the tributariesshown on figure 27 were simulated by PRMS modelingand input to the Willamette WDM file.Figure 28 shows results of routing the input flow40.6 miles downstream from Vida, where it can be comparedto observed flow at the McKenzie River at Coburgstream-gaging station (14165500, discontinued), whereonly 1 year of record was available for comparison purposes.PRMS was used to simulate 230 mi 2 of interveningdrainage area (17 percent of the basin). Absoluteerror for the calibration period was 8.3 percent, andthere was a positive bias of 4.7 percent (table 12). Broadand Collins (1996) report that an average of 260 ft 3 /swas consumed in the basin in 1990.50
100ObservedSimulatedDISCHARGE, IN THOUSANDS OF CUBIC FEET PER SECOND101O N D J F M A M J J A S1972WATER YEARFigure 28. Observed and simulated discharge from combined Precipitation-Runoff Modeling System (PRMS) andDiffusion Analogy Flow (DAFLOW) modeling for the McKenzie River at Coburg, Oregon (stream-gaging station14165500), 1972 water year. (See Glossary for program descriptions.)Main-Stem NetworksFor convenience, the main stem of theWillamette River was divided into four networks.River segments were divided into several branches andconnected to one another similar to how the tributarynetworks were constructed. A starting hydrographfrom observed streamflow was input at grid 1 ofbranch 1. Tributary inflow was simulated by PRMSmodeling of the appropriate HRU’s, which were inputto corresponding grid locations in DAFLOW. Wheremajor tributary inflow was required, such as flow fromthe McKenzie River, the flow from that network had tobe simulated first to obtain the required input hydrograph.Input files for the following networks can befound in Appendix 7.Willamette River from Jasper to HarrisburgThe mapped and schematized Willamette Riverfrom Jasper to Harrisburg stream network is shownon figure 29. For this reach, the Willamette River isschematized as a three-branch network with fivetributary inflows. A flow hydrograph for the mouthof the McKenzie River was simulated by routingflow from the stream-gaging station at Vida andPRMS modeling of tributary basins and then inputto the Willamette WDM file. A discharge hydrographfrom observed data at the USGS stream-gaging stationon the Middle Fork Willamette River at Jasper(14152000) at RM 195.0 was used as the upstreamboundary input. Subbasin hydrographs for three minortributaries were simulated by PRMS modeling and51
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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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Page 12 and 13: network-routing models where availa
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Page 16 and 17: Figure 1. Willamette River Basin, O
Page 18 and 19: EvapotranspirationINPUTSAirtemperat
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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
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Page 46 and 47: 3,0002,500June 21-30, 1993September
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Page 56 and 57: YamhillRiver123˚45´ 30´ 15´123
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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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