Onset of Skimming Flow on Stepped Spillways
Publication: Journal of Hydraulic Engineering
Volume 125, Issue 9
Abstract
Assuming that skimming flow occurs when the jet leaving a step has a slope equal to that of the stepped spillway when it impinges on the pool behind it on the next step, an equation has been developed to predict the incipient value of yc/h, where yc = critical depth and h = step height. This equation was found to agree well with most of the experimental observations for h/l greater than about 1.0, where l = step length. For h/l = 1.7, the incipient value of yc/h = 0.24, whereas for values of h/l smaller than about 0.8, yc/h is almost constant at 0.8.
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References
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 125 • Issue 9 • September 1999
Pages: 969 - 971
History
Received: Oct 14, 1998
Published online: Sep 1, 1999
Published in print: Sep 1999
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