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<br />HEC-5C was developed to assist in planning studies involving <br /> <br /> <br />sizing system components for flood control and conservation require- <br /> <br /> <br />ments. The program can be used in the planning, design, operation <br /> <br /> <br />or post flood phases of system evaluation. The program can be used <br /> <br /> <br />to calculate the value of an existing system immediately after a flood <br /> <br /> <br />event to demonstrate the effects of existing and/or proposed reservoirs <br /> <br /> <br />on flows and damages in the system. The program could also be useful <br /> <br /> <br />in selecting the proper reservoir releases throughout a system during <br /> <br /> <br />flood emergencies. <br /> <br /> <br />The program simulates the sequential operation of the system <br />components for any system configuration for short-time intervals (such <br />as hourly) for historical or synthetic floods or for long duration <br />time intervals, (such as MOnthly) for nonflood periods, or for com- <br />binations of the two. Specifically the program may be used to deter- <br />mine: <br /> <br />- Flood control and conservation storage requirements for <br />each reservoir in the system. <br />- The effect of a system of reservoirs, or other structures <br />on the spatial and temporal distribution of runoff in a basin. <br />- The evaluation of flood control and conservation opera- <br />tional criteria for a system of reservoirs. <br />- The expected annual flood damages, expected annual benefits, <br />system costs, and system net benefits. <br /> <br />7 <br />