Riprap Sizing for ARS‐Type Low‐Drop Stilling Basins
Publication: Journal of Hydraulic Engineering
Volume 119, Issue 7
Abstract
The Agricultural Research Service (ARS)‐type low‐drop structure was developed and utilized to stabilize incising channels in northern Mississippi. The structure consists of a sheet pile stabilizer weir and stilling basin protected by riprap. Field inspections and laboratory tests have indicated that the current sizing criteria for riprap protection in the impingement area of the stilling basin may be inadequate during flood events. A 1:12 Froude scale model study was conducted with prototype median riprap sizes ranging from 0.61 m (23.9 in.) to 0.JHEND8 119 m (36.5 in.), prototype discharges ranging from JHEND8 119.7 m3/s (3,308 cfs) to 221.1 m3/s7,801 cfs), and submergences ranging from 0.41 to 1033. The ratio of the approach unit discharge and median rock size was related to the submergence for calculating the stable riprap size. The unit discharge at the weir and the submergence appear to be indicators of riprap stability in the stilling basin.
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References
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 119 • Issue 7 • July 1993
Pages: 864 - 869
Copyright
Copyright © 1993 American Society of Civil Engineers.
History
Received: Feb 24, 1992
Published online: Jul 1, 1993
Published in print: Jul 1993
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