Reduction of bend scour by an outer bank footing: Flow field and turbulence

Roca, M. and Blanckaert, K. and Martín-Vide, J.P. (2009) Reduction of bend scour by an outer bank footing: Flow field and turbulence. Journal of Hydraulic Engineering ASCE, 135 (5). pp. 361-368.

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Official URL: https://ascelibrary.org/doi/abs/10.1061/%28ASCE%29...

Abstract

River bank protection is a costly but essential component in river management. Outer banks in river bends are most vulnerable to scour and erosion. Previous laboratory experiments illustrated that a well-designed horizontal foundation of a vertical outer bank protruding into the cross section, called a footing, can reduce the scour depth and thereby protect the bank. This paper provides detailed experimental data in a reference experiment without footing and an experiment with footing carried out under similar hydraulic conditions, which suggest a delicate interaction between bed topography, downstream and cross-stream velocity, and to lesser extent turbulence. The presence of the outer bank footing modifies this delicate interaction and results in a more favorable configuration with respect to bank stability including: reduced maximum scour depth, more uniformly distributed downstream velocity, and weaker cross-stream circulation cells.

Item Type: Article
Subjects: Floods > River management
Floods > General
Coasts > Sediment transport and scour
Water > General
Divisions: Floods
Water
Depositing User: Unnamed user with email i.services@hrwallingford.com
Date Deposited: 02 Apr 2020 09:48
Last Modified: 29 May 2020 09:40
URI: http://eprints.hrwallingford.com/id/eprint/726

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