Riprap Criteria below Pipe Outlet
Publication: Journal of Hydraulic Engineering
Volume 119, Issue 2
Abstract
In this study, a general relationship for incipient motion of the sediment below a jet is first developed. Then, for the particular case of a pipe outlet, an experimental program has been conducted to test the resulting equation and to supply the necessary coefficients. For visual observation of sediments, the half‐jet technique was used, which made it possible to conduct a large number of tests in a relatively short period of time. The methods of sizing riprap, for a no‐scour plunge‐pool energy dissipator, based on incipient motion and incipient failure, are presented. Other topics investigated and discussed in this paper include effects of gradation and thickness of riprap as well as criteria for a gravel filter. A unified relationship for various riprap gradations is proposed by using for the incipient motion and for the incipient failure as the characteristic particle size.
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 119 • Issue 2 • February 1993
Pages: 181 - 200
Copyright
Copyright © 1993 American Society of Civil Engineers.
History
Received: Aug 25, 1989
Published online: Feb 1, 1993
Published in print: Feb 1993
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