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<br />002579 <br /> <br />CHAPTER IV <br /> <br />FUTURE WATER DEMANDS AND SUPPLIES <br /> <br />Water Demands <br /> <br />An inventory or future water requirements for the Pacific <br />Southwest, projected to the year 2000, is shown on table 13. These <br />projected requirements are based on comprehensive studies and pub- <br />lished reports by each of the principal States and Federal agencies <br />concerned. <br /> <br />The intent of this chapter is to clearly define the future needs <br />and deficiencies of the Pacific Southwest region on the basis of <br />demand-supply relationships, without regard to individual States or <br />geographic locations. <br /> <br />Possibilities for Augmentation of <br />Future Supplies [rom Present Sources <br /> <br />Implementation of a basinwide plan of water redistribution could <br />allay the feaI"S of water shortages by individual water-using entities. <br />Water could be provided upon demand within the confines of negotiated <br />agreements and based on predetermined water schedules. Thus, no con- <br />sumer would be forced to carry the burden of reduced supplies in a <br />water-short situationG <br /> <br />Redistribution of Available Water--Under a basinwide water plan, <br />such as is being proposed in this report, full advantage could be <br />taken of water surpluses whene.ier and wherever chey occur to benefit <br />all areaso In the same manner, water shortages in one area could be <br />compenaated for thTough redistribution or available supplies in other <br />areas. Such possibilities presume that coordinated water storage, <br />both surface and underground, is available for all of the major water- <br />use areaSg For example, rlows of the Colorado River~ surplus to <br />river commitments and on-stream storage capability, could be stored <br />against future shortages in off-stream surface reservoirs or in ground- <br />water basins where planned ground-water storage is availableg This <br />concept could be applied throughout the Pacific Southwest. The first <br />requirement under such a plan of operations wOuld be to meet the needs <br />of critical water-shortage areas 0 <br /> <br />Conservation of Available Water--Possibilities for conservation <br />of water exist on all natural channels and within conveyance and <br />distribution systems. <br /> <br />IV-l <br />