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Show PART II PRESENT STATUS OF IRRIGATION Other depletions related to irrigation include reservoir evaporation and consumptive use of water incidental to the cropped area, phreatophytes, and seeped lands. Water depletion by irrigation and related use was 2,127,800 acre-feet for the 1965 level of development. This amounts to about 62 percent of the 3.45 million-acre-foot total depletion for all uses in the region (including transmountain diversions) for the same period. Present on-site water depletions by irrigated cropland and related uses are shown in Tables 9 and 10. Table 9 - Present on-site water depletions by irrigated cropland, incidental use, and irrigation reservoir evaporation-1965^/ (Unit--1,000 acre-feet) Hydrologic Subregions Type of use Green River Subregion Upper Main Stem Subregion San Juan-Colorado Subregion Total Irrigated cropland Incidental use Reservoir evaporation 662.^ 113.6 k2.k 167.3 16.9 287.5 3^.7 55.6 1,697.3 315.6 11^.9 Total 818. k 931.6 377.8 2,127.8 1/ Source: Upper Colorado Region Comprehensive Framework Study, Water Resources Work Group Data, Soil Conservation Service, Denver, Colo, Irrigation water being used on beet field in Colorado, |