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<br />000542 <br /> <br />where <br />qjj = integer valued flow rate from node i to j <br />Cjj = cost per unit of flow or water right priority from <br />node i to node j <br />~j = lower bound on flow in the linkage connecting node <br />i to node j <br />Ujj = upper bound on flow in the linkage connecting node <br />i to node j <br /> <br />Equation 2 insures that the flow into anyone node is equal <br />to the flow out of that node. Notice that the bounds in <br />equation 3 are themselves functions of flow qjj" This introduces <br />nonlinearly into the problem which is solved by a successive <br />approximation procedure. <br /> <br />Reservoir System Operations <br /> <br />Target storage levels: <br /> <br />MODSIM computes the system hydrologic state by <br />considering current reservoir storage levels and inflows to a <br />certain user specified subset of reservoirs in the system that <br />best represent hydrologic conditions in the basin. <br /> <br />Associated with each of these states (classified as average, <br />dry, and wet) is a corresponding set of operating rules with <br />ranking priorities. These three hydrologic states are <br />computed at the beginning of each period for the user <br />selected reservoir subset. The user also specifies upper and <br />lower bounds on the average state as fractions of the total <br />subsystem storage capacity: <br /> <br />13 <br />