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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />o <br />~ <br />lV <br />~ <br /> <br />-5- <br /> <br />(1) To delineate the regions in which salinity control <br />projects should be implemented to achieve the <br />maximum salinity reductions for various levels of <br />available funding; <br /> <br />(2) To evaluate the best salinity control policies as <br />functions of alternative water development sce- <br />narios in the basin, i.e., interbasin transfers, <br />energy industry developments, and expanded agri- <br />cultural diversions; <br /> <br />(3) To determine the impact of state and federal <br />policies on the costs of Upper Basin salinity <br />management plans; and <br /> <br />(4) To assess the sensitivity of the derived optimal <br />policies to assumptions regarding the physical <br />nature of the salinity system, and costs of <br />alternative control measures, and the effective- <br />ness of salinity control programs. <br /> <br />SCOPE OF INVESTIGATION <br /> <br />The salinity problem in the Colorado River Basin is <br /> <br />characteristic of arid and semi-arid river systems approach- <br /> <br />ing conditions of full water resource development. Several <br /> <br />years of intensive research and demonstration of alternative <br /> <br />salinity control technologies have yielded results which <br /> <br />should be applicable throughout the river basins in the <br /> <br />western united States as they reach full development. The <br /> <br />Colorado River salinity control program, therefore, might be <br /> <br />expected to serve as a model for future efforts elsewhere. <br /> <br />One major aspect of the Colorado River Basin salinity <br /> <br />problem has not heretofor been addressed. An analysis <br /> <br />integrating the existing information concerning alternative <br /> <br />salinity control measures into a basin-wide policy for water <br /> <br />quality improvement has not been made. It was necessary to <br /> <br />take the final step in developing salinity control technology <br />