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<br />-:.:, <br />,'- <br /> <br />o <br /><7) <br />(.lj <br />(;:"'> <br />~ <br />W <br /> <br />3 <br /> <br />during the irrigation season. This plan is not as <br /> <br />efficient, but it is much simpler and involves no <br /> <br />complicated computations. <br /> <br />A digital model was developed that simulates <br /> <br />reservoir operation through computations of monthly <br /> <br />water budgets. <br /> <br />It allowed testing of the above plans. <br /> <br />The model lists the monthly water budget on a compact <br /> <br />year (November 1 through October 31) basis and compiles <br /> <br />summary tabulations of the key data--headgate diversion <br /> <br />shortages and stateline flow. <br /> <br />Also, some recommendations made by F. M. Bell <br /> <br />concerning the improvement of irrigation efficiency in <br /> <br />Water District 67 were tested with the simulation model <br /> <br />using both of the above operational plans. Bell recom- <br /> <br />mended that the Amity Mutual Irrigation Company discon- <br /> <br />tinue the practice of diverting waters for storage in <br /> <br />their Great Plains reservoir system during November <br /> <br />through March and allow the waters to enter John Martin <br /> <br />Reservoir. His reasoning was that, since the Amity <br /> <br />Mutual Irrigation Company is entitled to a fraction of <br /> <br />all waters entering John Martin Reservoir, which is <br /> <br />about equivalent to the recovery ratio of their Great <br />