Research Article
Jan 1963

Analog Models for Flood Control Systems

Publication: Transactions of the American Society of Civil Engineers
Volume 128, Issue 1

Abstract

The success of applying analog model techniques to tidal flow channels has led to the extension of the technique to the simulation of flood control systems. The similarity relationships for long period flood waves are derived. Methods for the simulation of the channel sections are described, with particular attention paid to the non-linear properties of the stage-discharge relation and the stage-storage relation. The introduction of boundary conditions in the form of stream flows and rainfall excesses is programmed for each six hours in the prototype, for a total period of ten days, by special pin boards. Each simulated flood requires five milliseconds, after which initial conditions of flow, at the initial instant of the ten-day period, are re-established in preparation for the next flood period. The time history of stage or discharge at any two of fifty stations can be displayed simultaneously on an oscilloscope screen. Provision is made for the insertion of up to six reservoirs into the analog, each of which is provided with a programmable output simulating the action of reservoir release gates. It is expected that the analog will be useful both in project planning and during flood emergencies.

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Go to Transactions of the American Society of Civil Engineers
Transactions of the American Society of Civil Engineers
Volume 128Issue 1January 1963
Pages: 993 - 1004

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Published in print: Jan 1963
Published online: Feb 10, 2021

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J. A. Harder, M.ASCE
Asst. Prof. of Hydr. Engrg., Univ. of California, Berkeley, Calif.

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