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<br />W <br />"-l <br />en <br />()1 <br /> <br />;)' <br /> <br />Because; of the relatively low TDS of the collected saline water which <br />could be made available for solar ponds, the solar pond would not become <br />operatipnal for a long period of time (50 years or more) unless the <br />saline water were concentrated by use at or near the site. Conse- <br />quently, if power were to be developed in an optimal manner, additional <br />salt wo~ld have to be added throu9h local mining of existing salt <br />deposits at the pond site(s) to bring the concentrations to the level <br />required for pond construction and maintenance. <br /> <br />5. Powerplant Blowdown Water Disposal <br /> <br />Cooling water used by the powerp1ants is recycled and thereby concen- <br />trated to form a brine that must normally be disposed of in costly lined <br />evaporation ponds. The collection and disposal of such blowdown water <br />in a saline water disposal system would be a substitute for constructing <br />evaporation ponds. <br /> <br />D. Other Uses of Saline Water <br /> <br />Saline water with typical TDS levels of 5,000 mg/L or below can also be <br />used for pQwerp1ant ash disposal, dust control, air pollution control, and <br />revegetatiQn of crops using salt-tolerant plant species and agriculture. <br />However, s~ch uses may not be a permanent solution to salt removal from the <br />8asin. <br /> <br />Extracting minerals from saline water is also technically feasible but the <br />low market 'value for the major mineral products of salt, magnesia, and <br />potash, as well as high transportation costs, make mineral recovery uneco- <br />nomical at :present. Aquaculture, halophytes, and other saline water appli- <br />cations are now in the research stages and may provide opportunities in the <br />future. <br /> <br />IV-27 <br /> <br /> <br />I <br />