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

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Major Land Use MapHydrologic Soil Group MapUrbanAgricultureForestB. Moderately fine to moderately coarse −Moderate infiltration ratesC. Moderately fine to fine −Slow infiltration ratesD. Clay layer, impervious −Very slow infiltration ratesGeology MapSlope MapColumbia River basalt groupTertiary−Quaternary sedimentary depositsTertiary−Quaternary Volcanic rocks of the CascadesTertiary marine sedimentary rocks0 to 5 percent slope5 to 30 percent slopeMore than 30 percent slope−−south aspectMore than 30 percent slope−−east aspectMore than 30 percent slope−−west aspectMore than 30 percent slope−−north aspectFigure 6. Major land use, slope and aspect, geology, and soils in the Molalla River Basin, Oregon.16
Table 4. Definition of geologic assemblages in the Willamette River Basin, Oregon, grouped according to water-bearingcharacteristics[#, a code number component from other categories of land use, slope, and soils; [gal/min, gallons per minute (table is excerpted fromtable 1, by McFarland [1983])]________________________________________________________________________________________________Geologicassemblage Lithologic Water-bearingand code description characteristics________________________________________________________________________________________________Tertiary-Quaternary Sand, gravel, and silt, unconsolidated to Permeability generally high; however, less permeablesedimentary deposits consolidated; some weathered basalt and fine material is commonly interlayered with good##0# pyroclastic rocks are also included. aquifers. Wells yield more than 2,000 gal/min in someareas, but average less than 300 gal/min. Most productiveaquifer unit in western Oregon.Tertiary-Quaternary Andesite and basalt, flow and pyroclastic Largely unknown. Available data indicate variablevolcanic rocks of the rocks. permeability. Well yields range from a few gallons perHigh Cascademinute to 300 gal/min. Springs issuing from the unit##3# are commonly large.Columbia River Basalt Basalt; distinctive columnar jointing and Overall permeability low, but interflow zones and##6# fractured interflow zones. scoriaceous flow tops are relatively permeable. Dense,poorly permeable flow centers may limit recharge.Yields may exceed 1,000 gal/min, but are typically lessthan 100 gal/min.Tertiary volcanic Andesite, basalt, and dacite; older rocks are Permeability is generally low; however, fracturing mayrocks of the Western dominantly volcaniclastic and younger rocks form localized permeable zones. Well yields may reachCascade Range are almost entirely flow material. 100 gal/min, but average less than 20 gal/min.##9#Tertiary rocks of the Sandstone, siltstone, and mudstone, Permeability low. Well yields are generally less thanCoast Range commonly tuffaceous; intrusive rocks. 10 gal/min.##1#________________________________________________________________________________________________Table 5. Definitions of soil groups in the Willamette River Basin, Oregon[Source: Hydrologic soil groups from U.S. Soil Conservation Service, 1975]________________________________________________________________________________________________HydrologicInfiltration rategroup [inches/hour] Description________________________________________________________________________________________________A 0.45–0.30 Soils having a high infiltration rate (low runoff potential) when thoroughly wet. Theseconsist mainly of deep, well drained to excessively drained sand or gravelly sand. These soilshave a high rate of water transmission.B .3–.15 Soils having a moderate infiltration rate when thoroughly wet. These consist chiefly of moderatelydeep or deep, moderately well drained or well drained soils that have moderatelyfine texture to moderately coarse texture. These soils have a moderate rate of watertransmission.C .15–.05 Soils having a slow infiltration rate when thoroughly wet. These consist chiefly of soilshaving a layer that impedes the downward movement of water or soils of moderately finetexture or fine texture. These soils have a slow rate of water transmission.D
Page 1: Precipitation-Runoff and Streamflow
Page 4 and 5: U.S. DEPARTMENT OF THE INTERIORBRUC
Page 6 and 7: Determining Travel Time and Dilutio
Page 8 and 9: 2. Stream-gaging stations used to c
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Page 12 and 13: 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 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 64 and 65: 122˚15´ 122˚00´121˚52´30´´4
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
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WILL.WDMData-base file(Observed pre
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WILL.WDMData-base fileSWSTATSFreque
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Jobson, H.E., 1980, Comment on A ne
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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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