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Influence of directional spreading on wave overtopping of sea dikes with gentle and shallow foreshores

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10.1016/j.coastaleng.2020.103654
 
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hdl:2117/178528

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Altomare, CorradoMés informacióMés informacióMés informació
Suzuki, T.
Verwaest, Toon
Document typeArticle
Defense date2020-04
Rights accessOpen Access
Attribution-NonCommercial-NoDerivs 4.0 International
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 4.0 International
ProjectDURCWAVE - amending the Design criteria of URban defences in LECZs through Composite-modelling of WAVE overtopping under climate change scenarios (EC-H2020-792370)
Abstract
The work highlights the importance of directional spreading effects on wave overtopping estimation in shallow and mild sloping foreshores. Wave short-crestedness leads, in general, to a reduction of mean overtopping discharges on coastal structures. In the present work, the case of a sea dike with gentle foreshore in very and extremely shallow water conditions is analysed. Physical model tests have been carried out in order to investigate the effect of directional spreading on overtopping and incident wave characteristics. In the present experimental campaign, the effect of wave spreading has only been investigated for perpendicular wave attack. Results show that directional spreading is proved to cause a reduction of average discharge of sea dikes with gentle and shallow foreshore. Expressions for the reduction factor for directional spreading are derived, fitted on the tested database. The use of this reduction factor leads to more accurate prediction and avoids overtopping overestimation, however reduction-factor formulations are overtopping-formula depending.
CitationAltomare, C.; Suzuki, T.; Verwaest, T. Influence of directional spreading on wave overtopping of sea dikes with gentle and shallow foreshores. "Coastal engineering", Abril 2020, vol. 157, p. 103654:1-103654:12. 
URIhttp://hdl.handle.net/2117/178528
DOI10.1016/j.coastaleng.2020.103654
ISSN0378-3839
Publisher versionhttps://www.sciencedirect.com/science/article/abs/pii/S0378383919302418
Other identifiershttps://arxiv.org/abs/2002.04531
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  • LIM/UPC - Laboratori d'Enginyeria Marítima - Articles de revista [233]
  • Departament d'Enginyeria Civil i Ambiental - Articles de revista [2.617]
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