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(1) At the beginning of each month, estimate the end-of- <br />month contents for each reservoir. on the first <br />iteration, use the target content; on later iterations, <br />use the interim computations to refine the estimate. <br />Use the mean of the beginning and ending contents to <br />determine evaporation, surface elevation and seepage. <br />(2) Introduce the runoff and/or local flow, and all return <br />flows delayed from previous months; allow the water to <br />run freely to the end of the basin. <br />(3) Sort the natural right diversions by priority date, and <br />work through the list attempting to satisfy the <br />requirements. Return flows (natural) are available to <br />- satisfy earlier diversions which may be short. <br />(4) Sort the project right requirements by priority date, <br />and work through the list attempting to satisfy them. <br />First, attempt to divert project flow, then attempt to <br />divert natural flow, then attempt to release water from <br />control reservoirs. Return flows are available to <br />satisfy earlier project requirements which may be short. <br />Reservoir releases for IFR's and power are available for <br />diversion as soon as they have served the purpose for <br />which they were released. <br />(5) Attempt to release any excess water (above maximum <br />content) from the reservoirs. If there is any release, <br />and if there are any unsatisfied project demands, go <br />back to step (4). <br />(6) Attempt to collect any surplus water (up to maximum <br />content) in the reservoirs. <br />(7) Perform the pool maintenance routine. If this results <br />in any releases, and if there are any unsatisfied <br />project demands, then try to use the releases to satisfy <br />the shortages. <br />(8) Examine the end-of-month content at each reservoir. If <br />the mean content of each reservoir is within 4 acre-feet <br />of the initial estimate, the month is done; otherwise go <br />back to step (1) and repeat the process. <br />19