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Distribution of individual wave overtopping volumes on a sloping structure with a permeable foreshore

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Salauddin, Md , O'Sullivan, John, Abolfathi, Soroush, Dong, Shudi and Pearson, Jonathan M. (2020) Distribution of individual wave overtopping volumes on a sloping structure with a permeable foreshore. Coastal Engineering Proceedings (36v). doi:10.9753/icce.v36v.papers.54

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Official URL: https://doi.org/10.9753/icce.v36v.papers.54

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Abstract

Maximum wave overtopping volumes on sea defences are an indicator for identifying risks to people and properties from wave hazards. The probability distribution of individual overtopping volumes can generally be described by a two-parameter Weibull distribution function (shape and scale parameters). Therefore, the reliable prediction of maximum individual wave overtopping volumes at coastal structures relies on an accurate estimation of the shape factor in the Weibull distribution. This study contributes to an improved understanding of the distribution of individual wave overtopping volumes at sloping structures by analysing the wave-by-wave overtopping volumes obtained from physical model experiments on a 1V:2H sloped impermeable structure with a permeable shingle foreshore of slope 1V:20H. Measurements of the permeable shingle foreshore were benchmarked against those from an identical experimental set-up with a smooth impermeable foreshore (1V:20H) of the same geometry. Results from both experimental set-ups were compared to commonly used empirical formulations, underpinned by the assumption that an impermeable foreshore exists in front of the sea structure. The effect on the shape factor in the Weibull distribution of incident wave steepness, relative crest freeboard, probability of overtopping waves and discharge are examined to determine the variation of individual overtopping volumes with respect to these key parameters. A key finding from the study is that no major differences in Weibull distribution shape parameter were observed for the tested impermeable and permeable sloped foreshores. Existing empirical formulae were also shown to predict reasonably well the Weibull distribution shape parameter, b, at sloping structures with both impermeable and permeable slopes.

Item Type: Journal Article
Subjects: Q Science > QA Mathematics
T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TC Hydraulic engineering. Ocean engineering
T Technology > TD Environmental technology. Sanitary engineering
Divisions: Faculty of Science > Engineering
Library of Congress Subject Headings (LCSH): Weibull distribution, Water waves, Coast defenses, Coastal zone management , Coastal engineering
Journal or Publication Title: Coastal Engineering Proceedings
Publisher: Coastal Engineering Research Council
ISSN: 2156-1028
Official Date: 31 December 2020
Dates:
DateEvent
31 December 2020Published
31 December 2020Accepted
Date of first compliant deposit: 11 January 2021
Number: 36v
DOI: 10.9753/icce.v36v.papers.54
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
Chancellor’s International Scholarship schemeUniversity of Warwickhttp://dx.doi.org/10.13039/501100000741
UNSPECIFIEDInterreghttp://dx.doi.org/10.13039/100013276
Ecostructure Project : Ireland-Wales Cooperation Programme[ERDF] European Regional Development Fundhttp://dx.doi.org/10.13039/501100008530

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