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Show PART XI PROJECTED WATER USE Included herein is a summary of estimated water uses in terms of on-site depletions, including the transmountain diversions from the stream system. Water Needs in Terms of On-Site Depletions By the year 2020 there will be on-site depletion needs of 6.5 million acre-feet. The largest consumptive use need, which is 50.5 percent of the total in 2020 or 3.29 million acre-feet, is for irri- gated crops, associated seeped and incidental phreatophyte areas, and irrigation reservoir evaporation. Minor water needs in 2020 are in municipal and industrial water supply (1.3 percent), minerals (0.8 percent), augmented fish and wild- life and recreation (1.4 percent), and stockpond evaporation and livestock use (.9 percent), thermal-electric power generation (9.7 percent). About 1.65 million acre-feet or 25.3 percent of the 2020 depletion would be exported from the region. Main Stem regulating reservoir evaporation would account for 10.1 percent, or 660,000 acre- feet of depletion. Summary tables for stream depletions for the five states and three subregions by types of needs for 1980, 2000, and 2020 follow. The five States agreed that the year 2020 depletion distribution should reflect the States' percentages shown in the Upper Colorado River Basin Compact. This relationship, however, was not to be adherred to in the interim period. The water needs for 1980 and 2000 conform to the respective projections for each subregion. Municipal and Industrial Depletions by domestic, manufacturing, governmental, commercial and other related purposes in the basin for 2020 are 110,100 acre-feet, Population and municipal, industrial, and related water users, Upper Colorado Region Population Depletions Subregion 1980 2000 2020 1980 2000 2020 Ac-ft Ac-ft Ac-ft Green River Upper Main Stem San Juan-Colorado 107,000 143,000 176,000 124,000 171,000 241,900 151,000 204,000 324,800 11,700 16,200 15,100 16,900 24,900 25,900 26,400 40,400 43,300 Region Total 426,000 537,700 680,200 43,000 67,700 110,100 49 |
