Ranking Analysis of Clear Water Scour Depth Equations at Bridge Piers

Vaiza Shiraz, Abdul Sattar Shakir, Noor Muhammad Khan

Abstract


Scouring is one of the major threat to the stability of bridge piers. Both clear and live bed scour conditions are different phenomena and should be evaluated individually. In this evaluation, the available clear water scour prediction equations are evaluated using available laboratory and field data. The overall performance of these equations is quantified by using statistical parameters, namely ‘Sum of squared errors’, ‘Mean Absolute error’ and ‘Root Mean square error’. The results show that no single equation can said to be accurate. The top-ranked three equations which manifest better estimation of clear water scour depth are Sheppard & Miller, Molinas and Gao equations, respectively

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References


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