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<br />002259 <br /> <br />Chapter II <br /> <br />Development of a Physically Based Distributed <br />Parameter Rainfall Runoff Model <br /> <br />Table 2.-Spatial data layers in the Gunnison GIS database <br /> <br />Spatial data layer (coverages) <br />Hydrography <br /> <br />Scale Source <br /> <br />Comments <br /> <br />1:100,000 USGS <br />DLG's <br /> <br />Edge matched and filtered by <br />Reclamation <br /> <br />DEM <br /> <br />1 :250,000 USGS 3 arc second <br />1 :250,000 USGS Land use/land cover <br />1 :500,000 NWS Digitized from NWS maps by <br /> Reclamation <br />1 :250,000 USGS OEM Created from DEM by USGS <br />1 :250,000 USGS OEM Created from DEM using TIN by <br /> Reclamation <br />1 :250,000 USGS DEM Created from OEM using TIN by <br /> Reclamation <br /> <br />Land cover <br /> <br />Isohyetal <br /> <br />Elevation <br /> <br />Aspect <br /> <br />Slope <br /> <br />Irrigable lands <br /> <br />1 :24,000 Various <br /> <br />Reclamation Upper Colorado <br />Irrigable Lands Database <br /> <br />Subbasins <br /> <br />1:100,000 USGS <br /> <br />Drawn and digitized from <br />topographic maps by Reclamation <br /> <br />Soils <br /> <br />1 :250,000 NRCS <br /> <br />STATSGO database <br /> <br />HRU <br /> <br />1 :250,000 Various <br /> <br />Derived from aspect, land cover, <br />and subbasin coverages by <br />Reclamation <br /> <br />DEM = Digital elevation model <br />DLG = Digital line graph <br />NRCS = Natural Resource Conservation Service <br />NWS = National Weather Service <br />TIN = Triangulated irregular networks <br />ST A TSGO = State geographic database <br /> <br />11 <br />