Alternative Linear Weir Design
Publication: Journal of Irrigation and Drainage Engineering
Volume 117, Issue 3
Abstract
Weirs are devices installed in channels by means of which flow may be measured within a given degree of accuracy. Linear weir flow‐measuring devices introduce less relative error in discharge measurement. The design of a linear weir is such that the base approaches infinity; this makes its theoretical design physically unrealizable. Various attempts have been made to achieve a practical weir profile by cutting off the infinite bottom wings and providing base weirs of different shapes. Furthermore, all these designs use a constant discharge coefficient, whereas there is a considerable variation in the discharge coefficient with the head/weir‐height ratio. A linear weir profile that includes the variation of discharge coefficient and does not require base and datum corrections is presented herein. A design example has also been included.
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Copyright © 1991 ASCE.
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Published online: May 1, 1991
Published in print: May 1991
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