Temporal Evolution of Clear-Water Pier and Abutment Scour
Publication: Journal of Hydraulic Engineering
Volume 128, Issue 9
Abstract
Scour related to bridge hydraulics received much attention in the past decade, including its relation to flood hydrology and hydraulic processes in addition to steady flow. This paper presents new research on bridge pier and abutment scour based on a large data set collected at ETH Zurich, Switzerland. In total six different sediments were tested, of which three were uniform. Also a large variety of scour elements were considered, from 1 to 60% of the channel width, and flow depths ranging from 1 to about 40% of the channel width. Using similarity arguments and the analogy to flow resistance, an equation for temporal scour evolution is proposed and verified with the available literature data. The agreement of the present scour equation with both the VAW data and the literature data were considered sufficient in terms of river engineering accuracy, provided limitations relating to hydraulic, granulometric, and geometrical parameters are satisfied. These limitations are discussed and refer particularly to effects of viscosity, which were excluded in the present scour equation.
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Published In
Journal of Hydraulic Engineering
Volume 128 • Issue 9 • September 2002
Pages: 811 - 820
Copyright
Copyright © 2002 American Society of Civil Engineers.
History
Received: Nov 20, 2000
Revised: Mar 20, 2002
Published online: Aug 15, 2002
Published in print: Sep 2002
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