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0731 <br />• The permanent pool was assumed to contain 10,000 acre -feet (1.2x10 <br />m of water at the start of the simulation and, hence, the initial <br />volume in John Martin Reservoir was increased by a like amount. The <br />permanent pool was limited to 15,000 acre -feet (1.9x10 m but was not <br />allowed to invade the flood- control pool by more than 10,000 acre -feet <br />(1.2x10 7 m 3 ). Neither of these limitations was encountered in the <br />simulation, but the latter condition may be a consideration during times <br />of major flooding. <br />Once the Division of Wildlife's water is stored in John Martin <br />Reservoir, it begins to suffer evaporation losses. Evaporation losses <br />are calculated each month on the basis of the total volume of water in <br />the reservoir. This evaporation is then charged against the permanent <br />pool and other water in the reservoir on the basis of their respective <br />volumes. During a month in which the water is being transferred to John <br />Martin Reservoir, the evaporation charge is one -half of what the charge <br />would be had the water already been in the reservoir. <br />13 <br />