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Evaluation of existing equations for temporal scour depth around circular bridge piers

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Abstract

Scour is defined as the processes of removal of sediment particles from water stream bed by the erosive action of activated water, and also carries sediment away from the hydraulic structures. Scour is the main cause of pier failure. Numerous equations are available for estimating temporal and equilibrium scour depth. The present study describes the phenomenon of temporal scour depth variation at bridge piers and deals with the methods for its estimation. The accuracy of six temporal scour depth equations are also checked in this study. After graphical and statistical analysis, it was found that the relationship proposed by Oliveto and Hager (J Hydraul Eng (ASCE) 128(9):811–520, 2002) predicts temporal scour depth better than other equations. Three equations of equilibrium time of scour are also used for computing equilibrium time. Equilibrium time equation proposed by Choi and Choi (Water Environ J 30(1–2):14–21, 2016) gives better agreements with observed values.

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Authors and Affiliations

  1. Indian Institute of Technology, Roorkee, 247667, India

    Manish Pandey, P. K. Sharma, Z. Ahmad & Umesh Kumar Singh

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  1. Manish Pandey
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  2. P. K. Sharma
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  3. Z. Ahmad
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  4. Umesh Kumar Singh
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Correspondence to Manish Pandey.

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Pandey, M., Sharma, P.K., Ahmad, Z. et al. Evaluation of existing equations for temporal scour depth around circular bridge piers. Environ Fluid Mech 17, 981–995 (2017). https://doi.org/10.1007/s10652-017-9529-9

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  • DOI: https://doi.org/10.1007/s10652-017-9529-9

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