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<br />o <br />or:. <br />w <br />o <br /> <br />-6,- <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />on a large scale. The preliminary basis for this type of <br />analysis has been developed by Walker (1978) and partially <br />tested by Walker et al. (1978). <br />This project was developed in order to evaluate the <br />alternative strategies for controlling salinity in the Upper <br />Basin, and therefore, identify components of individual <br />salinity programs throughout the Upper Basin in the context <br />of how best to use available funds. At the local scale, <br />only the results reported by Evans et al. (1978a,b), Flug <br />et al. (1977), Walker (1978) and. Walker et al. (1978) have <br />been concerned with optimal salinity control strategies. <br />These studies have been completed in only one area, the <br />Grand Valley in western Colorado. Erlenkotter and Scherer <br />(1977) developed an economic optimization model for the <br />entire Colorado River Basin, but stopped short of an <br />ultimate framework for basin-wide salinity management. <br />This writing delineates a cost-effective salinity <br />control policy for future water resource development in the <br />Upper Colorado River Basin taking into account: (a) salin- <br />ity control; (b) energy development; and (c) new water <br />demands. The feasibility of maintaining 1972 levels of <br />salinity at Imperial Dam set forth by the u.s. Environmental <br />Protection Agency and the seven basin states has also been <br />evaluated. Under this criterion, it can be expected that <br />approximately 2 to 3 million Mgm of salt must be eliminated <br />from the flows passing into the Lower Basin in order to <br />offset the development of the remaining Upper Basin <br />