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<br />discount rates (higher for example), if uniform for all system <br />components,will generally not affect the relative attractiveness <br />(one to another) but will affect the overall attractiveness of the <br />system. Damage potential, because it becomes integrated with hydrol- <br />ogic and hydraulic data to yield expected annual damages, must change <br />significantly among control points before major differences in system <br />formulation would result. This is not the situation which exists for <br />costs, they enter the analysis directly and thus should receive, <br />relatively speaking, more attention in accommodating uncertainty in <br />system formulation. <br /> <br />SUMMARY <br /> <br />The systems viewpoint applied to reservoir flood control systems <br />includes the physical representation of the system (sites, storage, <br />costs, stream conveyance, basin hydrology) and the economic representa- <br />tion of the consequences of flooding (damage centers, damage potential, <br />frequency of flooding). The flood control system to be formulated con- <br />sists of the reservoirs and their operating characteristics. Computer <br />Pro~ram HEC-5C, "Simulation of Flood Control and Conservation Systems," <br />has been developed by The Hydrologic En~ineering Center as a general- <br />ized tool which can be used to simulate any flood control system. <br />The pro~ram was written to be compatible with generally accepted <br />analysis procedures that require data normally developed in the <br />course of studying flood control reservoirs. <br /> <br />31 <br />