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<br /> <br />. <br /> <br />O~2230 <br /> <br />Moore and Wood - 6 <br />Oral - GSA <br /> <br />, <br />~ <br /> <br />~he wells intercept some of the ground water moving <br /> <br />toward the river as return flow. In many reaches of the <br /> <br />stream, pumping of ground water reverses the slope of <br /> <br />the water table, and water moves from the river toward <br /> <br />the wells. Some reaches of the river that formerly were <br /> <br />gaining are now losing. These losses decrease the amount <br /> <br />of water in the river available for diversion. The <br /> <br />unregulated use of ground water benefits those who have <br /> <br />wells but works a hardship on many of those who have <br /> <br />only surface-water rights. To minimize this adverse <br /> <br />_ effect and to achieve the maximum use of the available <br /> <br />. water supply, ground water and surface water must be <br /> <br />. <br /> <br />developed and managed as a unit. <br /> <br />The purpose of the study in the Arkansas Valley is <br />to evaluate the operation of the hydrologic system <br />quantitatively so that effects of proposed changes in <br />water management can be predicted. To this end, an <br /> <br />analog model of the valley was constructed. Because of <br /> <br />the many unknowns, the large mass of data, and complex <br /> <br />hydrologic interrelations, an evaluation could not <br /> <br />have been made without,such a model. <br /> <br />~ <br /> <br />j <br /> <br />~~ <br />.1' <br />