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<br />Q <br />C"J <br />',-) <br />-..J <br />CJ1 <br />~ <br /> <br />SUMMARY AND CONCLUSIONS <br /> <br />Water Depletion Requirements <br /> <br />Projected water depletion requirements, associated with four <br />alternative levels of development were: <br /> <br /> OBE- Reg. 6.5 8.16 <br />Year !RL Int. MAF ~ <br /> - Mi1~ acre-feet - <br />1965 3.4 3.4 3.4 3.4 <br />1980 4.2 4.8 4.8 4.9 <br />2000 4.9 6.1 6.3 6.8 <br />2020 5.1 6.5 6.5 8.1 <br /> <br />For the regional interpretation of OBE-ERS projections total water <br />depletions were 15, 25, and 28 percent higher in 1980, 2000 and 2020 <br />than for OBE-ERS projections. Total water requirements were about <br />the same in each time frame for both regional interpretation of OBE- <br />ERS projections and States I alternative 'at 6.5 MAF. Projected de- <br />pletions for States' alternative at 8.16 MAF were greater than region- <br />al interpretation by 100,000 acre-feet in 1980, 700,000 acre-feet in <br />2000 and 1.6 million acre-feet in 2020. <br /> <br />Recommendations <br /> <br />Social scientists should be included at the policy-making, <br />management and technical levels of comprehensive natural resources <br />development planning studies and project implementation studies. <br />An interdisciplinary approach to planning is vital and necessary <br />to provide meaningful analyses of natural resources development <br />that will be responsive to real needs of people. <br /> <br />Future analyses should explore those alternatives which have <br />been traditionally ignored in water resources planning such as the <br />reallocation of water from use in marginal agriculture to urban or <br />industrial uses and the shifting of water among industrial uses. <br />These, and other such alternatives, must be explored in depth, if <br />optimal use of water resources is to be achieved for the well-being <br />of all. <br /> <br />Sensitivity analyses of alternatives and assumptions should <br />be done for efficiencies of water use, alternative cropping patterns, <br />alternative crop yields and levels of water availability. <br /> <br />v <br /> <br />\, <br /> <br />