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Time Scale for Contraction Scour at Bridges
Several methods exist for predicting rates of pier and abutment scour. Contraction scour equations are developed using sediment transport equations for live-bed conditions and initiation of motion concepts for clear-water conditions. This paper extends these concepts to predict the rate of contraction scour primarily at tidal bridges under storm surge conditions. The method is incorporated into a spreadsheet and can be used for either clear-water or live-bed conditions. The ultimate scour predicted with this approach compares very well with the standard contraction scour equations and, depending on the amount of upstream sediment supply, can occur within a few hours to several months.
Time Scale for Contraction Scour at Bridges
Several methods exist for predicting rates of pier and abutment scour. Contraction scour equations are developed using sediment transport equations for live-bed conditions and initiation of motion concepts for clear-water conditions. This paper extends these concepts to predict the rate of contraction scour primarily at tidal bridges under storm surge conditions. The method is incorporated into a spreadsheet and can be used for either clear-water or live-bed conditions. The ultimate scour predicted with this approach compares very well with the standard contraction scour equations and, depending on the amount of upstream sediment supply, can occur within a few hours to several months.
Time Scale for Contraction Scour at Bridges
Zevenbergen, Lyle W. (author)
Joint Conference on Water Resource Engineering and Water Resources Planning and Management 2000 ; 2000 ; Minneapolis, Minnesota, United States
Building Partnerships ; 1-6
2000-09-11
Conference paper
Electronic Resource
English
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