FLOOD02741

• County: Statewide
• Basin: Statewide
• Title: HEC-5 Simulation of Flood Control and Conservation Systems
• Date: 6/1/1979
• Prepared For: US
• Prepared By: COE
• Floodplain - Doc Type: Educational/Technical/Reference Information

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HEC-5

SIMULATION nF FLonD CnNTRnL AND cnNSERVATI0N SYSTEMS
USERS MANUAL

INTRnDUCTION

1. ORIGIN OF PROGRAM

This pr09ram was developed at The Hydrologic Engineering Center by
Bill S. Eichert. The initial version was written for flood control
operation of a single flood event and was released as HEC-5, "Reservoir
System Operation for Flood Control," in ~lay 1973. The program was then
expanded to include operation for conservation purposes and for period
of record routings. This revised program was referred to as HEC-5C up
to the February 1978 version. This June 1979 version of HEC-5 super-
sedes all previous versions and is the version this manual documents.

2. PURPOSE OF PROGPAM

This program was develooed to assist in planning studies for evaluating
proposed reservoirs in a system and to assist in sizing the flood control
and conservation storage requirements for each project recommended for
the system. The program can be used in studies made immediately after
the occurrence of a flood to evaluate preproject conditions and to show
the effects of existing and/or proposed reservoirs on flows and damages
in the system. The program should also be useful in selecting the
proper reservoir releases throughout the system during flood emergencies
in order to minimize flooding as much as possible and yet empty the
system as quickly as possible while maintaining a balance of flood
control storage among the reservoirs.

The above purposes are ,accomplished by simulating the sequential
operation of a system of reservoirs of any configuration for short
interval historical or synthetic floods or for long duration nonflood
periods or for combinations of the two. Specifically the program may be
used to determine:

a. Flood control and conservation storage requirements for each
reservoir in the system.

b. The influence of a system of reservoirs on the spatial and
temporal distribution of runoff in a basin.

c. The evaluation of Operational criteria for both flood control
and conservation (including hydropower) for a system of reservoirs.

d. The expected annual flood damages, systems costs, and system
net benefits for flood damage reduction.

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