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<br />. <br /> <br />. <br /> <br />rctQ3 ~~ ~o.. <br /> <br />LC-712 <br />PRJ-13.00 <br />X-ADM-10.00 <br /> <br />JUN 011992 <br /> <br />From: <br /> <br />Colorado River Water Management Work Group Members ) <br />.IX" <br />~l Planning and Loans Officer /,'~- <br />~.- ,,"-' <br />Colorado River Water Management and Planning Studies (CRWMPS) Vy >,' ,. <br />Results of Colorado River Simulation System (CRSS) Model Runs For June 8, ,f) () <br />1992 Meeting (Annual Operating Plan, Meeting) <br /> <br />To: <br /> <br />Subject: <br /> <br />Enclosed are graphs showing the results of recent model exercises developed for the <br />Management Work Group. These results will be discussed at the upcoming meeting on <br />June 8, 1992, at the Colorado Water Conservation Board meeting room in Denver, <br />Colorado. <br /> <br />As a follow up to discussions at the April 27, 1992 meeting, the model exercises were run <br />to evaluate alternate surplus strategy of using a more liberal surplus trigger elevation <br />until year 2001. <br /> <br />Two new runs were made involving 85 traces and compared with a previous run. All <br />runs use a Shortage Trigger Elevation of 910 feet. The runs also assume that, should a <br />flood control release occur, surplus conditions would be triggered for the remainder of <br />the year. The two runs include: <br /> <br />1. 6OC/80C Surplus Trigger Elevation: 60 percent capacity of Lake Mead during. <br />years 1993 to 2000. Eighty percent capacity of Lake Mead for years 2001 to 2050. .. <br />Surplus releases allowed when capacity of Lake Mead reached 60 percent and <br />80 percent, respectively. <br /> <br />l <br />1-- - <br />fc._....- :/ <br />:~ ,"'/ , <br />. v-~: :~ '"": <br /> <br />.- <br /> <br />2. 7OC/80C Surplus Trigger Elevation: 70 percent capacity of Lake Mead during <br />years 1993 to 2000. Eighty percent capacity of Lake Mead for years 2001 to 2050. <br />Surplus releases allowed when capacity of Lake Mead reached 70 percent and <br />80 percent, respectively. , <br /> <br />'.";. ,... f"'"' <br />. '.ut> <br />~ ., <br />~l, <br />-< <br /> <br />! <br /> <br />These two runs were then compared with the previous 80 percent capacity run: <br /> <br />,...' , <br />r~'''''' " <br />,- , <br />-' <br />1'[.\-- -'. -\.... <br />~ c'w~- . <br /> <br />,-)1 (,:1 to> <br /> <br />LA 80C Surplus Trigger Elevation: 80 percent capacity of Lake Mead. Surplus <br />releases allowed when capacity of Lake Mead reached 80 percent. (This run was <br />completed and presented at the March 23, 1992 meeting. It was used for <br />