Subcritical Flow over Rectangular Side Weir
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Volume 120, Issue 1
Abstract
Side weirs are flow‐diversion devices widely used in irrigation, land drainage, urban sewage systems, and so forth. For computation of side‐weir discharge, the de Marchi equation is widely used. Using de Marchi's equation, various investigators have related the weir discharge coefficient with the main channel's upstream Froude number. Thus, the dominant variable ratio of head to weir height has not been considered in previous investigations. Presented herein is a concept of elementary discharge coefficient for the discharge of an elementary rectangular strip along the weir crest. Like that of a normal weir, this elementary discharge coefficient has been related to the head weir height ratio only. Using this relation, a methodology for determination of the weir discharge is described.
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References
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Published In
Journal of Irrigation and Drainage Engineering
Volume 120 • Issue 1 • January 1994
Pages: 212 - 217
Copyright
Copyright © 1994 American Society of Civil Engineers.
History
Received: Apr 18, 1991
Published online: Jan 1, 1994
Published in print: Jan 1994
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