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<br />-12- <br /> <br /> <br />C.v <br />CJl <br />...,1 <br />o <br /> <br />Table 2 <br />Summary of Estimated Water Use in the <br />Colorado River Basin~1 II <br />11,000 acre-feet) <br /> <br /> 1986 <br /> base condition 1990 2000 2010 <br />Upper Basin.!.1 3,527 3,894 4.454 4,771 <br />Lower Bas in.~./ 6,343 7,378 7,450 7,450 <br />Total 9,870 11,272 11,904 12,221 <br /> <br />1/ Does not include deliveries to Mexico. <br />11 Lower main stem only. <br />3/ Depletions at point use. Does not include CRSP <br />reservoir evaporation estimated by Reclamation to <br />average 520,000 acre-feet per year under full <br />development. ' <br />4/ Diversions from t,he main 'stem less returns. Does not <br />include main stem reservoir evaporation and stream <br />losses. <br />Salt Routing Studies <br />Salt routing studies were made for the 1987 Revie~ <br />using the Colorado River Simulation System (CRSS) developed <br />by the Bureau of Reclamation.~1 The CRSS is a package of <br />computer programs and data bases developed by Reclamation <br />as a tool for use by water resource managers dealing with <br />water related issues and problems in the Colorado River <br />Basin. The central feature of the CRSS is a computer <br />program which simulates the flow of water and salt through <br />the system and the operation of the reservoirs including <br />hydroelectric power plants. <br />The salt routing studies were conducted to provide <br />estimates of future flow-weighted average annual salinity <br />concentrations for each year of the 1986 through 2010 study <br />period at selected points i~ the Lower Basin using the <br />future water use projections described earlier and an <br />average annual long term water supply of 15 million <br />acre-feet. <br /> <br />11 Detailed information on CRSS is presented in: <br />"Colorado River Simulation System, An Executive <br />Summary," (October 1981); "Colorado River Simulation <br />System, Users Manual," (June 1982); and Colorado River <br />Simulation System, System Over~iew" (1984) all by the <br />Bureau of Reclamation. <br />