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<br />o <br />\.....) <br />,,-, <br />( \.) <br />C:") <br />en <br /> <br />174 <br /> <br />5.5.1.8 <br /> <br />Monthly Withdrawals From Lake Mead <br /> <br />Net withdrawals by the state of Nevada from Lake Mead for <br /> <br />municipal and industrial use in the Las Vegas and Boulder City areas <br /> <br /> <br />presently total approximately 0.02 MAF/yr (0.03 km3/yr). Higher <br /> <br />depletion levels are modeled using data from Ribbens and Wilson (1973; <br /> <br />Table X). <br /> <br />5.5.1.9 Adjustments to Control Variable Values for Modeling the <br />Effects of Salinity Control Projects <br /> <br />The reductions in salt loadings from each tributary or side <br /> <br />inflow due to the implementation of anticipated salinity control pro- <br /> <br />jects are also modeled. These projects have been devised to control <br /> <br />flows of salt from irrigated lands as well as from natural diffuse <br /> <br />and point sources of dissolved solids (U.S.C., 1974; Colorado River <br /> <br />Salinity Control Act, PL 93-320, Titles I and II). <br /> <br />The effects of the salinity control projects are modeled <br /> <br />by altering the values of irrigation pick-up of salt and side inflows <br /> <br />of salt as shown in Table 5.10. The quantities of salt removed by the <br /> <br />projects are taken from EPA estimates (EPA, 1971; pages 9 to 10). <br /> <br />5.5.2 Reservoir Operating Parameters <br /> <br />The control variables, which together with the operating rule <br /> <br />described in Section 5.2.3 determine the releases from each reservoir, <br /> <br />are called reservoir operating parameters. <br /> <br />These parameters are <br /> <br />listed in Table 5.4, and consist of maximum and minimum allowed <br /> <br />storages and target discharges for both Lakes Powell and Mead. <br />