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<br />which schematically illustrates terms to be used in solving for the <br />volumes to be stored, SA' In the fig. 6.02, Q1 represents the inflow <br />and Q2 represents the constant outflow. The recession constant. Ts . <br />may be defined as <br /> <br />T = <br />s <br /> <br />6S <br />li1I = <br /> <br />SA <br />2 + Q2 t <br />= <br />Q1 - Q2 <br /> <br />SA + 2Q2t <br />2{Q1 - Q2J <br /> <br />( 6-1) <br /> <br />then, <br /> <br />t = T2 - T1 = -Ts <br /> <br />Q2 <br />loge ""1f,"""" <br />1 <br /> <br />Q <br />= Ts loge 0;- <br /> <br />(6-2) <br /> <br />Substituting (6-2) into (6-1) and rearranging <br /> <br />SA = 2Ts (Ql - Q2 <br /> <br />Q1 <br />- Q2 loge Ci'2) <br /> <br />Q1 <br />= 2Ts [Q1 - Q2 (1 + loge Ci'2) ] <br /> <br />(6-3) <br /> <br />For each of various inflow rates and for each of various outflow rates, <br />compute the volume of water that must be stored, SA' using equation 6-3. <br />Then determine pool levels by subtracting SA from the storage value for <br />the given outf1o~1 as defined by the "induced surcharge envelope curve." <br />The computations are illustrated in table 6.01. The pool levels thus <br />determined represent the maximum pool levels that should be permitted <br />for the corresponding inflow and release rates. <br /> <br />~. Obtain a family of regulation curves by plotting the pool levels <br />corresponding to various outflows using inflow as a parameter. The <br />family of curves is shown in fig. 6.03. <br /> <br />6-06 <br />