Practical Constant‐Accuracy Linear Weir
Publication: Journal of Irrigation and Drainage Engineering
Volume 120, Issue 3
Abstract
This paper is concerned with the modifications of the Extended Bell‐mouth Weir (EBM weir) earlier designed by Keshava Murthy. It is shown that by providing inclined sides (equivalent to providing an inward‐trapezoidal weir) over a sector of a circle of radius , separated by a distance , and depth , the measurable range of EBM can be considerably enhanced (over 375%). Simultaneously, the other parameters of the weir are optimized such that the reference plane of the weir coincides with its crest making it a constant‐accuracy linear weir. Discharge through the aforementioned weir is proportional to the depths of flow measured above the crest of the weir for all heads in the range of , within a maximum deviation of ±1% from the theoretical discharge. Experiments with two typical weirs show excellent agreement with the theory by giving a constant‐average coefficient of discharge of 0.619.
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References
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Information & Authors
Information
Published In
Journal of Irrigation and Drainage Engineering
Volume 120 • Issue 3 • May 1994
Pages: 550 - 562
Copyright
Copyright © 1994 American Society of Civil Engineers.
History
Received: Aug 3, 1993
Published online: May 1, 1994
Published in print: May 1994
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