Protection Against Scour at SAF Stilling Basins
Publication: Journal of Hydraulic Engineering
Volume 119, Issue 1
Abstract
Severe scour may occur downstream of SAF stilling basins and some type of protection may be required to ensure the integrity of the structure. Tests were conductred using physical models to determine the minimum size and length of riprap required for stability when the riprap was placed at the elevation of the end sill and the elevation of the basin floor. For both placements, the size of riprap required for stability increases exponentially with the Froude number. Larger riprap is required for stability when the riprap is placed at the end sill elevation compared to when it is placed at the basin floor elevation. Relationships are presented to determine the size and length of riprap required to ensure basin integrity.
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References
1.
Blaisdell, F. W. (1959). “The SAF stilling basin, a structure to dissipate the destructive energy in high‐velocity flow from spillways.” Agriculture Handbook No. 156, U.S. Dept. of Agriculture, Agricultural Research Service, Washington, D.C.
2.
Grace, J. L. Jr. (1972). “Outlet works for Branched Oak and Cottonwood Springs Dams, Oak Creek, Nebraska, and Cottonwood Springs Creek, South Dakota.” TR H‐72‐1. U.S. Army Engineer Waterways Experiment Station, Vicksburg, Miss.
3.
Gwinn, W. R. (1981). “Model study of a box‐inlet chute spillway and SAF stilling basin.” ARM‐S‐17, U.S. Department of Agriculture, Science and Education Administration, Washington, D.C.
Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 119 • Issue 1 • January 1993
Pages: 133 - 139
Copyright
Copyright © 1993 American Society of Civil Engineers.
History
Received: Jul 24, 1992
Published online: Jan 1, 1993
Published in print: Jan 1993
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