Author(s): D. Max Sheppard

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Keywords: NULL

Abstract: The vast majority of structure-induced (local) sediment scour research has been devoted to understanding the complex flow and sediment transport processes and to predicting equilibrium scour depths. Much has been learned over the last few decades through laboratory and field testing and ever improving numerical computation models. As a result, the accuracy of equilibrium scour depth prediction models has improved significantly. Less studied, but also important, is the rate at which local scour occurs. The ability to predict scour rates allows more accurate estimates of design scour depths for real world situations where the design flow is time dependent and/or the sediment properties are depth dependent. A methodology for predicting local scour rates at structures with complex geometries under clearwater flow conditions is discussed along with examples that illustrate where and how the methodology can be used.

DOI:

Year: 2023