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<br /> <br />O~2238 <br />.. <br /> <br />Moore and ~ood- <br />Oral - GSA <br /> <br />USE OF MODEL <br /> <br />The analog model is now being tested at the U.S. <br /> <br />Geological Survey's computer laboratory in Phoenix. The <br /> <br />proper weighting of input factors to the model (such as <br />recharge and evapotranspiration) will be determined by <br />trial comparisons with observed aquifer response. The <br />model will then be used to predict the effects of changes <br /> <br />in water management. Some of the evaluations that will <br /> <br />be made by the model are as follows: <br /> <br />1. Quantitative evaluation of the effect of <br /> <br />ground-water pumpage on seepage to and from the river. <br /> <br />2. De,fine areas where additional ground-water <br /> <br />. <br /> <br />withdrawals would be beneficial, such as salvage of <br />ground water that is now being evaporated or transpired <br />nonbeneficially. <br /> <br />3. Use of ground water to satisfy senior water <br />rights downstream from junior appropriators. <br /> <br />4. Provide a means of predicting water availability <br />in different areas under different conditions of surface- <br /> <br />water delivery and ground-water pumpage. <br />, <br /> <br />. <br /> <br /> <br />t, <br />, <br />I <br />14f " <br />, <br />, <br /> <br />-> <br /> <br />. <br />, <br /> <br />l; <br />