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<br />o <br />CJl <br />~ <br />w, <br /> <br />7 <br /> <br />(1) Store 15,000 acre-feet per month when the spring runoff is <br />low (R = 53.5), and fill the reservoir to its 120,000 acre- <br />feet capacity by Jlll1e 30 for all higher R inflows; <br />, (2) In the summer season borrow per month: <br />14.2 when S = 19.8 with probability .029, <br />9,8 when S = 28.2 with probability .145, and <br />5 when S = 33 with probability .102; <br /> <br />(3) In the winter season draw the reservoir down to 20,000 acre- <br /> <br /> <br />feet on March 31 when S = 19.8 and W ~ 22.6 with probability <br /> <br />.007, and draw the reservoir down to 30,000 acre-feet on <br /> <br />March 31 otherwise. <br /> <br />In this method (as well as in simulations) the average amOlll1t stored <br />equals the average amOlll1t withdrawn less any regulation losses, The fol- <br />lowing table illustrates the storage and borrowing outcomes from this <br /> <br />regulation criteria. <br /> <br />Total Total Total <br />Avail S Avail <br /> = Per W Expected W <br />for Season for W <br />Brwing Brwing Brwing M:>nth Probability Borrowing <br />55 14.2(3) = 12.4 2.1 .007 ,02 <br />45 14.2(3) = 2,4 .4 ,022 .01 <br />45 5(3) = 30.0 5,0 .102 .51 <br />90 9,8(3) = 60.6 10,1 .145 1.46 <br />90 0 = 90,0 15.0 ,724 10.86 <br /> 12.86 <br /> <br />The 12.86 is the expected amount available to augment W season monthly <br />flows. The expected amOlll1t of monthly borrowing in the S season is computed as <br />