Research Article
Dec 1969
Triangular Board-Crested Weir
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VIEW THE REPLYAuthors: Clifford D. Smith and Wen S. LiangAuthor Affiliations
Publication: Journal of the Irrigation and Drainage Division
Volume 95, Issue 4
Abstract
The advantages of flow measurement with a thin plate V-notch weir and a broad-crested weir are reviewed briefly. The triangular broad-crested weir is intended to combine the advantages of both in a single structure. The discharge coefficient and limiting submergence are derived from simple theory based on the assumption of critical flow. Details are given for experiments carried out on a weir with a 90○ notch angle and four different lengths of broad crest. It was found that the actual coefficient was less than theoretical and was not constant; however, the limiting submergence agreed exactly with theory, provided the length of the broad crest was at least three times the head. A design curve for the coefficient is included.
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Published In
Journal of the Irrigation and Drainage Division
Volume 95 • Issue 4 • December 1969
Pages: 493 - 502
Copyright
© 1969 American Society of Civil Engineers.
History
Published in print: Dec 1969
Published online: Feb 11, 2021
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Authors
Affiliations
Clifford D. Smith
Prof. of Civ. Engrg., Univ. of Saskatchewan, Saskatoon, Canada
Wen S. Liang
Grad. Res. Asst., Colorado State Univ., Fort Collins, Colo
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