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<br />.0722 <br /> <br />. <br /> <br />.HYDROLOGIC EFFECTS OF REDUCING IRRIGATION TO MAINTAIN <br /> <br />A PERMANENT POOL IN JOHN MARTIN RESERVOIR, <br /> <br />ARKANSAS RIVER VALLEY, COLORADO <br /> <br />By Richard R. Luckey <br /> <br />ABSTRACT <br /> <br />The U.S. Geological Survey has evaluated a plan by the Colorado <br /> <br />Division of Wildlife to maintain a permanent pool of 10,000 acre-feet <br /> <br />7 <br />(1.2xlO cubic meters) in John Martin Reservoir on the Arkansas River. <br /> <br />- <br /> <br />This pool would be maintained through the use of ~ater assigned to shares <br /> <br />in the Catlin Canal Company that the Division has acquired. This plan <br /> <br />was evaluated using a lumped parameter model developed to test <br /> <br />. <br /> <br />management alternatives in a stream-aquifer system. A 25-year period <br /> <br />from 1949 through 1973 was simulated. Based on this simulation, it is <br /> <br />-- <br /> <br />concluded that (1) the Division of ],ildlife has sufficient shares in <br /> <br />the Catlin Canal Company to maintain a permanent pool of the proposed <br /> <br />size, (2) surface-water diversions by most other canals in the basin <br /> <br />would increase slightly under the proposed plan, (3) the flow at the <br /> <br />Colorado-Kansas State line ~ould increase slightly under the proposed <br /> <br />plan, and (4) the ground-water system would not be significantly <br /> <br />affected by the proposed plan. <br /> <br />~." <br /> <br />4 <br />