Flow‐Measurement Structures of Compound Cross Section for Rivers
Publication: Journal of Irrigation and Drainage Engineering
Volume 120, Issue 1
Abstract
Several types of flow‐measurement structures are used in rivers. One of the more common flow‐measurement structures is the critical‐depth flume. By definition, the velocity increases through the contracted section of the flume, which, in turn, minimizes deposition of sediment in the structure. Critical‐depth flumes are preferred in rivers where sediment transport through the structure is substantial. Dimensioning of these flumes for sediment‐free flow conditions over the structure has not yet been studied. In this paper, theoretical and experimental studies carried out on critical‐depth flumes of symmetrical compound cross sections are presented. Design criteria based on hydraulic model studies conducted with sedimentary materials having various properties are given. Following the procedure for dimensioning a proper flow‐measurement structure, a design example is presented for application. This procedure can easily be applied to a river of known hydraulic and geometric properties to determine the appropriate dimensions of the flow‐measurement structure along which there will be no sediment deposition under any flow condition. Consequently, a fixed rating curve that is unaffected by sediment deposition can be obtained for the flow‐measurement structure.
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Information & Authors
Information
Published In
Journal of Irrigation and Drainage Engineering
Volume 120 • Issue 1 • January 1994
Pages: 110 - 127
Copyright
Copyright © 1994 American Society of Civil Engineers.
History
Received: May 14, 1992
Published online: Jan 1, 1994
Published in print: Jan 1994
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