Laserfiche WebLink
<br />7.0 Sources of data <br /> <br />The sources of data, as used in the SAMSON model, are the following: <br />. Aquifer boundaries - USGS maps, compiled by Hurr et a1. (1972) <br /> <br />. Ground surface elevation (river system) - USGS topographic maps <br /> <br />. Water table elevation values (river system) - Water table elevation contour maps, <br />compiled by Hurr et a1. (1972) <br /> <br />. Specific yield of aquifer (average) - Hurr et al. (1972) <br /> <br />. Average transmissivity for each cell - Transmissivity contour maps, compiled by Hurr et <br />a1. (1972) <br /> <br />. <br /> <br />Saturated thickness values - Saturated thickness contour maps, compiled by Hurr et a1. <br />(1972) <br />Waterlogged cells - USGS topographic maps and Division of water Resources (State of <br />Colorado), aerial photographic maps <br />River reach length, width, bed elevation - USGS topographic maps and Division of Water <br />Resources (State of Colorado), aerial photographic maps <br />River diversion points - State Engineer's Office <br />Diversion capacities - Colorado water data bank <br />Rating curves for gaging station - State Engineer's Office <br />Canal reach length, bed slope/elevation - USGS topographic maps <br />Canal capacities - Colorado water data bank <br />Seepage characteristics (canals) - Woodward-Clyde Consultants (1982) <br />Boundaries of supply areas - USGS topographic maps and USDA land use maps <br />On-farm efficiencies for supply areas - Woodward-Clyde Consultants (1982) and ditch <br />companies <br />Location and capacity of irrigation wells - Colorado Water Data bank <br />Total irrigated area under ditch company - Ditch companies in study area <br />Crop distribution for entire region - Colorado Agricultural Statistics and ditch companies <br />Soil characteristics of root zone - Soil Conservation Service curve numbers based on soil <br />type in each area <br />Location and area of each reservoir - USGS topographic maps <br />Bare soil distribution information - Division of Water Resources (State of Colorado), <br />aerial photographic maps <br />Phreatophyte growth area information - Ditch companies in study areas <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />12 <br />