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<br />-8- <br /> <br />o <br />~ <br />w <br />~ <br /> <br />strategies indicate the added costs of individual <br />restrictions. Other results evaluate the problems of <br />treating one type of existing use, such as irrigated agri- <br />culture, to offset the salinity attributable to new water <br />developments. <br />There is by no means an absolute certainty in any <br />planning effort. Data m~st be collected and evaluated <br />during the course of time in order to update and refine <br />earlier conclusions. While this work is no exception, and <br />the strategies developed maybe easily modified as new <br />information becomes available or political attitudes alter <br />the importance of salinity, the results illustrate an <br />important and necessary first step. Sensitivity analyses <br />have been used to identify important areas needing special <br />studies and particular data requirements which would most <br />effectively assist accurate determination of future programs <br />and policies. <br />The scope of this work, in a mathematical sense, is <br />also limited by the choice of optimization criteria. <br />Minimum capital, operation, and maintenance costs expressed <br />as an equivalent annual cost are used to systematically <br />compare salinity control alternatives. While recognizing <br />the much broader economic concepts that operate in the real <br />systems this more restricted indicator is believed to be <br />defensible. Most funding for salinity control projects, as <br />currently authorized, is expected to come from federal <br />sources because the real economic system is unable to return <br /> <br />. <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 />