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<br />"! r~ .' ~ <br />.LO.i._ <br /> <br />Water Uses <br /> <br />Colorado niver Basin depletions in the Upper Basin are classified <br />by the Bureau of Reclamation as inbasin consumptive uses, transbasin <br />diversions, and reservoir evaporation. Irrigated agriculture is respon- <br />sible for most of the inbasin consumptive uses. The quantity of these <br />uses is estimated by applying unit "later use factors to estimates of <br />the land areas being irrigated. The Bureau of Reclamation estimates <br />of Colorado River "later depletions above Lee Ferry for the 1978 \'later <br />year are: <br /> <br />Acre-feet <br /> <br />Inbasin Depletions <br />Transbasin Diversions <br />neservoir Evaporation <br /> <br />2,420,000 <br />936,000 <br />550,000 <br /> <br />Total, Upper Basin <br />Depletions <br /> <br />3,906,000 <br /> <br />Table 3 shm'lS diversions less measured return floHs for the major <br />\'later users in the Loser Basin during the past five calendar years. As <br />can be seen, LO\'ler Basin use during 1975 was 317,000 acre-feet less than <br />the previous year's use. This decrease uas primarily the result of <br />reduced diversions by the 11etropolitan Hater District (rlr'JD). Because of <br />drought conditions in 1977, MIlD's supply of northern California "later <br />"ras greatly reduced and the District increased its use of Colorado River <br />l'later. In 1978, conditions returned to normal. This year, diversions <br />by the Fort Mojave Indian Reservation (FIUn) are sh01-m. The figures <br />are estimates made early in 1975 by FIIIRo 1977 figures are not yet <br />available. Only minor diversions \'lere made by FIUn prior to 1977. <br /> <br />TABLE 3 <br />DIVERSIONS LESS I!~ASURED RETURNS <br />FOR filAJOR \'IATER USERS <br />LWER COLORADO RIVER <br />1971: to 1978 <br />(Thousands of Acre-feet) <br /> <br /> Calendar Year <br />California 1974 ,1975 1976 1977 1975 <br />lfutropolitan Water Dist. 1,125 782 $00 1,285 715 <br />Palo Verde Irrig. Disto 475 451 3S7 431 ~25 <br />Imperial Irrig. Dist. 3,133 3,047 2,831 2,717 2, 70 <br />Coachella Valley Co. 566 516 <br />Hater District 552 499 525 <br />Yuma Project, Res. Div. 44 46 47 41 45 <br />Ft. 110jave Indo Res. 16 <br />Subtotal, California 5.311 4,1192 4,5Gl 4,973 4,596 <br /> <br />- 4 -- <br />