Clear-Water Scour around Abutments in Floodplains

Clear-water scour around a bridge abutment in the floodplain of a compound channel was investigated. Experiments were conducted in a flume with a fixed-bed main channel and a movable-bed floodplain in which the abutment terminated. Flow depth, discharge, compound-channel geometry, and abutment lengt...

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Bibliographic Details
Published in:Journal of hydraulic engineering (New York, N.Y.) N.Y.), 1994-08, Vol.120 (8), p.956-972
Main Authors: Sturm, Terry W, Janjua, Nazar Sadiq
Format: Article
Language:English
Subjects:
Earth sciences
Earth, ocean, space
Engineering and environment geology. Geothermics
Engineering geology
Exact sciences and technology
Freshwater
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Summary:Clear-water scour around a bridge abutment in the floodplain of a compound channel was investigated. Experiments were conducted in a flume with a fixed-bed main channel and a movable-bed floodplain in which the abutment terminated. Flow depth, discharge, compound-channel geometry, and abutment length were varied, and measurements of approach velocity distribution and scour depth were obtained. A preliminary relationship for the dimensionless scour depth is suggested to illustrate the compound-channel effects on scour. The proposed relationship is limited to the range of values covered by the variables in this study.
ISSN:0733-9429
1943-7900
DOI:10.1061/(ASCE)0733-9429(1994)120:8(956)