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<br />10 <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 /> <br />increased water supply would have to be acquired. A coopera- <br />tive institutional mechanism would be needed to organize, <br />fund, install, operate and maintain such projects in most <br />cases. Project costs, water yields, and economic feasibility <br />would vary widely from area to area and would have to be <br />determined on a project-by-project basis. <br /> <br />Estimated average annual runoff from noncultivated lands <br />throughout the High Plains Region vary from about zero to <br />more than ten inches. Those lands with high average runoff <br />characteristics could be considered as potential water source <br />areas and those with minimum runoff as potential recharge <br /> <br />areas. <br /> <br />Because representati ve projects are not avail abl e for <br />assessment and because the legal/institutional mechanisms are <br />not in place for initiating such projects, no projections of <br />potential local water supply augmentation have been included <br />for this technology by any of the six study states. <br /> <br />d. Artificial recharge - there are extensive areas in most High <br />Plains states where increased recharge to the Ogallala Forma- <br />tion is feasible (e.g. Nebraska Sand Hills, dune areas in <br />eastern New Mexico and western Texas, etc.). A combination of <br />precipitation management, vegetative management and water <br />spreading in these areas could accelerate recharge of the <br />Ogallala. Treatments to modify more favorable areas as catch <br />basins or runoff retention areas could provide artificial <br />recharge opportunities. <br /> <br />While such projects could significantly increase local re- <br />charge to the Ogallala in some areas, the potential benefits <br />(increased ground water suppl ies) should not accrue only to <br />