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<br />002827 <br /> <br />- <br /> <br />e <br /> <br />, I \ or- <br />releases. Releases from Lake Powell were then computed using the target \\~ ~Q~ <br />Q,\ vJ <br />storage, inflow, beginning of year storage, evaporation, and upper bas:JOn v.q~_.h~ ~ <br />fvn... Lob: Powdl eJ~ Jo~ <br />depletions. The annual releasesAwere constrained to be at least (C\o-.P U/Q., <br />~f\ (&1 <br />nO \ ,01,/ <br />I' \fir':. ':T'" ~ <br />T0\~~~{ \. <br />q\V-~ '{f'~ <br />8 j'~' <br /> <br />8,230,000 acre-feet. <br /> <br />Results of this model were useful in estimating the general impact of <br /> <br />the strategies on the river system. <br /> <br />More specific information on the <br /> <br />monthly impact of these strategies was needed, however, and a seasonal <br /> <br />(monthly) simulation model was developed. <br /> <br />Seasonal Model <br /> <br />This mOdet(known as MONSIM) estimates releases from Lake Mead on an <br />annual basis using the annual strategy. <br /> <br />Based on the annual release strategy results, a decision is made at the <br />start of the water year to (a) release only downstream requirements, <br /> <br />(b) de~lare ~ surplus to MWD and CAP, (c) declare a surplus to MWD, CAP, <br /> <br />and to Mexico, or (d) declare surpluses beyond CAP, MWD, and Mexico. If <br /> <br />(d) is selected, then the excess surplus beyond CAP, MWD, and Mexico is <br />Men 11' It <br />distributed according to the normal historically observedArelease <br /> <br />pattern. <br /> <br />At the start of the water year, once releases have been planned for, a <br />commitment is made for any CAP~ MWD, or Mexican surplus releases. In <br />addition, those other surplus releases beyond CAP, MWD, and Mexico are <br /> <br />committed for the first 5 months of the water year. <br /> <br />6 <br />