Overtopping a truncated planar beach

Hogg, Andrew J., Baldock, Tom E. and Pritchard, David (2011) Overtopping a truncated planar beach. Journal of Fluid Mechanics, 666 521-553. doi:10.1017/S0022112010004325

Author Hogg, Andrew J.
Baldock, Tom E.
Pritchard, David
Title Overtopping a truncated planar beach
Journal name Journal of Fluid Mechanics   Check publisher's open access policy
ISSN 0022-1120
Publication date 2011-01-10
Year available 2010
Sub-type Article (original research)
DOI 10.1017/S0022112010004325
Volume 666
Start page 521
End page 553
Total pages 33
Place of publication Cambridge, United Kingdom
Publisher Cambridge University Press
Collection year 2012
Language eng
Abstract Run-up on a truncated impermeable beach is analysed theoretically and experimentally to find the volume of fluid, associated with a single wave event, that flows over the end of the beach. The theoretical calculations investigate the motion using the shallow-water equations and the fluid is allowed to flow freely over the end of the beach. Two models of wave events are considered: dam-break initial conditions, in which fluid collapses from rest to run-up and overtop the beach, and a waveform that models swash associated with the collapse of a long solitary bore. The calculations are made using quasi-analytical techniques, following the hodograph transformation of the governing equations. They yield predictions for the volume of fluid per unit width that overtops the beach, primarily as a function of the dimensionless length of the beach. These predictions are often far in excess of previous theoretical calculations. New experimental results are also reported in which the overtopping volumes due to flows initiated from dam-break conditions are studied for a range of reservoir lengths and heights and for a range of lengths and inclinations of the beach. Without the need for any empirically fitted parameters, good agreement is found between the experimental measurements and the theoretical predictions in regimes for which the effects of drag are negligible.
Keyword Coastal engineering
Hydraulic control
Shallow water flows
Hydraulic resistance
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes First published online 16 Novemeber 2010

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
Official 2012 Collection
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Citation counts: TR Web of Science Citation Count  Cited 6 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 5 times in Scopus Article | Citations
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Created: Sun, 06 Mar 2011, 00:08:59 EST