Large scale experiments on beach evolution induced by bichromatic wave groups with varying group period

Alsina, Jose M., Caceres, Ivan, van der Zanden, Joep, Ribberink, Jan S. and Baldock, Tom E. (2014). Large scale experiments on beach evolution induced by bichromatic wave groups with varying group period. In: Patrick Lynett, Proceedings of the 34th International Conference: Coastal Engineering 2014. International Conference on Coastal Engineering, Seoul, Korea, (1-10). 15-20 June 2014. doi:10.9753/icce.v34.sediment.3

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Author Alsina, Jose M.
Caceres, Ivan
van der Zanden, Joep
Ribberink, Jan S.
Baldock, Tom E.
Title of paper Large scale experiments on beach evolution induced by bichromatic wave groups with varying group period
Conference name International Conference on Coastal Engineering
Conference location Seoul, Korea
Conference dates 15-20 June 2014
Proceedings title Proceedings of the 34th International Conference: Coastal Engineering 2014   Check publisher's open access policy
Place of Publication San Francisco, CA, United States
Publisher Coastal Engineering Research Council
Publication Year 2014
Sub-type Fully published paper
DOI 10.9753/icce.v34.sediment.3
Open Access Status DOI
ISBN 9780989661126
ISSN 2156-1028
Editor Patrick Lynett
Start page 1
End page 10
Total pages 10
Collection year 2015
Language eng
Abstract/Summary New large scale experimental data have been presented showing the wave group influence on beach morphodynamics at the surf and swash zones. Bichromatic wave conditions were generated varying the modulation bandwidth but keeping the wave energetic content constant within the experimentation limits. The wave group influence in the surf zone is observed in the form of the cross-shore location of the breaker bar respect to the initial still water level (SWL) location, which has been shown to increase as increases the wave group period. This influence is explained in terms of differences on the surf zone width induced by the varying wave group periods. In the swash zone, time dependent bed level elevation measurements were done using a newly developed conductivity technique, the CCM+ system. Bed level time variations at the swash zone have shown to be composed of a long scale trend and bed level oscillations of shorter frequencies related to the wave group forcing. A good spectral correlation has been found between the water surface elevation and bed level variation at the wave group period for every bichromatic component indicating an important influence of wave groups on the swash zone morphodynamics.
Keyword Wave groups
Beach morphology
Bed level changes
Swash zone
Breaker bar location
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Conference Paper
Collections: School of Civil Engineering Publications
Official 2015 Collection
 
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Created: Mon, 23 Feb 2015, 15:05:15 EST by Jeannette Watson on behalf of School of Civil Engineering