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<br />ELICTROMIC COMPUTIR PROGRAM ABSTRACT <br />TITLE or PROGIIlIAM I P"OG"AM NO. <br />Simulation of Flood Control & Conservation Systems (HEC-5 ) 723-500 <br />PIIE".'''MG All."cvUS Army Engineer Distri.ct, Sacramento, Corps of Engineers, >--- <br />The Hydrologic Enldneering Center 609 Second Street, Davis, California 95616 <br /> I C"""LETEO _.__u___ . <br />I AUT HO..,.. IT ATUI 0.. PIIIOCUlIAM <br /> PH.." IITA.. H <br />Bill S. Eichert June 1979 Init. Op. <br />I A. pu"POIE OP ~"OG"A. <br />The program is designed to simulate the sequential operation of a reservoir- <br />channel system of any configuration. The program can be used to evaluate <br />existing and proposed systems using defined flow sequences. Any two time <br />intervals can be used throughout a discharge sequence to best define the <br />essence of the modeled operation. Expected annual damages, system costs, and <br />net benefits for flood damage reduction can also be determined. Automatic <br />determination of yield or conservation storage can be made for up to nine <br />independent reservoirs. <br />e. PROOIIAM.NeIP'CATIONS <br />The program is dimensioned for 15 control points, 10 reservoirs, 5 power plants, <br />11 diversions and approximately 50 time periods. (Any number of time periods <br />can be used with the program.) The dimensions can be varied for larger or <br />smaller computer systems. One single array is used to store all variables that <br />vary with time, and that array can be easily increased or set by the computing <br />system. <br />c. .aT HODl <br />Discharge hydrogrpahs are provided to the modeled locations in the system. <br />Hydrographs are routed through channels by any of five hydrologic routing <br />techniques. Reservoir releases are made to evacuate flood control storage as <br />rapidly as possible without causing flooding, to provide for two levels of <br />minimum flow requirements, and to provide defined hydropower requirements. <br />Pump-storage & diversions can also be simulated within the system. <br />D. .auIPII.IIT DaT AU.' <br />The program has been subdivided into two separate programs labeled HEC-5A and <br />HEC-5B. The programs were written in FORTRAN IV, on a CDC 7600 computer with <br />65K words of central memory and 500K words of extended memory. The library <br />version operates on the CDC with 75K storage and 8 scratch units. The <br />program can easily be overlayed to operate with 60K words of storage. <br />a. ,..~,. OUTO'UT <br />Card input and printer output are used. The first program reads the input data <br />operates the system, and generates an intermediate file. The second reads <br />the intermediate file, displays output, and computes economic results. <br />Subroutines can be added to the output half of the program to provide for <br />interactive interrogation of the intermediate file of results. A separate <br />interactive output program has been developed on the Boeing Computer System. <br />'0 ADDITIONAL. 'U!:IIAluca <br />This program represents a major expansion of the capabilities of the original <br />HEC-5 program for flood control operation. It also replaces the earlier <br />versions labeled HEC-5C. Input for the earlier versions is gererally compatible <br />with the current version. <br /> <br />IIlII '01111 <br />t AUO 60 <br /> <br />2883 <br /> <br />"Rnloue aOlTION8 "'". O.ecU..&T&. <br /> <br />14 <br />