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<br />C40U <br />To fulfill these objectives, a digital ground-water model was used <br /> <br />to simulate current conditions and conditions with the proposed reser- <br /> <br />voir added SO that changes caused by its presence could be determined. <br /> <br />The analysis is based on steady-state conditions; that is, the proposed <br /> <br />.. <br />. <br /> <br />reservoir pool is maintained at a constant level and the water table in <br /> <br />the aquifer has reached its equilibrium position in response to head <br /> <br />changes caused by the reservoir. The study does not consider: (1) <br /> <br />Whether the South Platte River can supply enough water to fill the <br /> <br />reservoir and maintain the level of the pool so that steady-state condi- <br /> <br />tions could be achieved, and (2) reservoir operations that may require <br /> <br />rapid changes in reservoir stage. Item 2 could result in ground-water <br /> <br />secpage gains to or seepage losses from the proposed reservoir that <br /> <br />w01l1d be sig"ificautly different from the steacil-state solutions. <br /> <br />Steady-state analysis will provide estimates of the maximum changes in <br /> <br />water-table altitude and ground-water discharge to the river and the <br /> <br />minimum seepage rates to or from the reservoir. An investigation to <br /> <br />determine the effects of unsteady river and reservoir stage on the <br /> <br />hydrologic system is beyond the scope of this study. However, an inves- <br /> <br />tigation of unsteady conditions is needed to complete the hydrologic <br /> <br />analysis of the proposed reservoir. <br /> <br />/1 <br />