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CRDSS <br />TASK MEMORANDUM 2.09 -20 <br />Summation of CU Estimates (Irrigation and Other Uses) for Selected Basins <br />Within the Colorado River Basin for calendar year 1985 -1990 <br />1.0 ISSUE <br />This task memorandum summarizes the results of consumptive use (CU) for <br />irrigated areas and other uses (livestock, stockponds, municipal, thermal electric, <br />mineral resources, and export) associated with the Yampa, White, Upper <br />Colorado, San Juan, and Dolores River Basins. <br />2.0 DISCUSSION <br />Crop consumptive use has been estimated for selected structures in each of the <br />River Basins mentioned previously through the use of the CRDSS -CU model <br />using water supply values calculated by STATEMOD. The details of the methods <br />used and the results for each structure being modeled are found in the following <br />task memos: <br />Upper Colorado River Basin Task Memo 2.09 -05 <br />White River Basin Task Memo 2.09 -06 <br />Yampa River Basin Task Memo 2.09 -07 <br />San Juan and Dolores River Basin Task Memo 2.09 -08 <br />The consumptive use for other uses is obtained from information from different <br />sources. The following is a summary of the information sources used to calculate <br />the consumptive use for other uses: <br />Livestock: The number of livestock for each county were obtained from the <br />census of agriculture that is conducted every 5 years. The values for 1982, 1987, <br />and 1992 were used to linearly interpolate and obtain the values for years 1985 <br />to 1990. <br />Stockpond: The stockpond areas were obtained by using the State <br />Engineer's Office stockpond database. <br />Reservoir: The reservoir evaporation values were reported by the United <br />Stated Geological Survey in their report: estimated use of water in the united <br />states in 1990. <br />Municipal: The population values reported in the US Census data for 1980 <br />and 1990 were used to linearly interpolate and obtain population values for 1985 <br />to 1990. Per capita usage was used to calculate CU. <br />Mineral: The mineral resource CU values were reported by the United <br />Stated Geological Survey in their reports: estimated use of water in the united <br />states in 1985, and estimated use of water in the united states in 1990. <br />Thermal Electric: The thermal electric CU values reported by the United <br />Stated Geological Survey in their reports: estimated use of water in the united <br />states in 1985, and estimated use of water in the united states in 1990 were both <br />used. <br />Export: The export values were obtained from the State Engineer's Office. <br />Wildlife and Recreation values were not reported by the USGS or the USBR. <br />