Anomalous Contraction Scour? Vertical-Contraction Case
Publication: Journal of Hydraulic Engineering
Volume 136, Issue 2
Abstract
Clear-water scour due to a short vertical (pressure flow) contraction was investigated in a laboratory channel. Two approach velocities were studied for a (nominally) single configuration of depth and degree of contraction, with experiments conducted for various durations up to a maximum of 48 h, and the evolution of the scour hole over time monitored. The location of maximum scour in both cases was observed to occur downstream of the contraction, with maximum scour depths substantially in excess of values predicted by published models, even though equilibrium scour conditions were not reached.
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Acknowledgments
The present work benefited from preliminary studies by Andy Selle and Yi-Chih Chen. Some remarks were also prompted by a discussion with Robert Ettema.
References
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 136 • Issue 2 • February 2010
Pages: 137 - 141
Copyright
© 2010 ASCE.
History
Received: Nov 15, 2005
Accepted: Sep 25, 2009
Published online: Jan 15, 2010
Published in print: Feb 2010
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