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<br />. <br /> <br />. <br /> <br />w <br />00 <br />tJ! <br />o <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />and salt movement. Any further development will cause a decrease in flow <br /> <br />quantities and an increase in the salt concentration of the remaining water. <br /> <br />Development of new irrigated areas within the basin on soils having a <br /> <br />residual salt content j:ligher than the equilibrium level under irrigated <br /> <br />agriculture, would increase the total quantity of salt being carried by the <br /> <br />river. Water imported to increase irrigated acreage would have to include an <br /> <br />allotment for the transport of mobilized salt to the sea at a concentration that <br /> <br />would not be detrimental to the lower users. <br /> <br />The early establishment of agricultural communities required a <br /> <br />stable water supply and an irrigated agruculture which would make them <br /> <br />self- sustaining. These settlers accepted the quantity and quality of water <br /> <br />that was available to them from the natural stream flow. Under these cir- <br /> <br />cumstances, industrial and municipal developments were rather limited. <br /> <br />With the development of capabilities for building large reservoirs, canals, <br /> <br />and deversions, the potential for full utilization of the resources became <br /> <br />available. The projects became multi-purpose, rather than single purpose, <br /> <br />providing, not only irrigation, but electrical power, _flood control, and <br /> <br />outdoor recreation with extra water for municipal and industrial use and <br /> <br />further urban development. The generation of electricity by discharges <br /> <br />from irrigation reservoirs made possible the pumping of deep wells and the <br /> <br />development of groundwater in other isolated areas. <br /> <br />The potential for irrigation development in the lower basin would suggest <br /> <br />that importation of water would be practiced in the future. The lower basin <br /> <br />31 <br /> <br />'( <br /> <br />',,~) <br />