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Gravel Barrier Beach Morphodynamic Response to Extreme Conditions

Kristian Ions, Harshinie Karunarathna Orcid Logo, Dominic Reeve Orcid Logo, Douglas Pender

Journal of Marine Science and Engineering, Volume: 9, Issue: 2, Start page: 135

Swansea University Authors: Kristian Ions, Harshinie Karunarathna Orcid Logo, Dominic Reeve Orcid Logo

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DOI (Published version): 10.3390/jmse9020135

Abstract

Gravel beaches and barriers form a valuable natural protection for many shorelines. The paper presents a numerical modelling study of gravel barrier beach response to storm wave condi-tions. The XBeach non-hydrostatic model was set up in 1D mode to investigate barrier volume change and overwash unde...

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Published in: Journal of Marine Science and Engineering
ISSN: 2077-1312
Published: MDPI AG 2021
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URI: https://cronfa.swan.ac.uk/Record/cronfa56120
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first_indexed 2021-01-25T09:44:56Z
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spelling 2021-02-23T15:25:52.2569513 v2 56120 2021-01-25 Gravel Barrier Beach Morphodynamic Response to Extreme Conditions 364f2d380fbdc5e825ee2cfdc2e10396 Kristian Ions Kristian Ions true false 0d3d327a240d49b53c78e02b7c00e625 0000-0002-9087-3811 Harshinie Karunarathna Harshinie Karunarathna true false 3e76fcc2bb3cde4ddee2c8edfd2f0082 0000-0003-1293-4743 Dominic Reeve Dominic Reeve true false 2021-01-25 FGSEN Gravel beaches and barriers form a valuable natural protection for many shorelines. The paper presents a numerical modelling study of gravel barrier beach response to storm wave condi-tions. The XBeach non-hydrostatic model was set up in 1D mode to investigate barrier volume change and overwash under a wide range of unimodal and bimodal storm conditions and barrier cross sections. The numerical model was validated against conditions at Hurst Castle Spit, UK. The validated model is used to simulate the response of a range of gravel barrier cross sections under a wide selection of statistically significant storm wave and water level scenarios thus simulating an ensemble of barrier volume change and overwash. This ensemble of results was used to develop a simple parametric model for estimating barrier volume change during a given storm and water level condition under unimodal storm conditions. Numerical simulations of barrier response to bimodal storm conditions, which are a common occurrence in many parts of the UK were also investigated. It was found that barrier volume change and overwash from bimodal storms will be higher than that from unimodal storms if the swell percentage in the bimodal spectrum is greater than 40%. The model is demonstrated as providing a useful tool for estimating barrier volume change, a commonly used measure used in gravel barrier beach management. Journal Article Journal of Marine Science and Engineering 9 2 135 MDPI AG 2077-1312 gravel barrier beaches; storms; XBeach; morphodynamic change; overwash; bimodal spectrum 28 1 2021 2021-01-28 10.3390/jmse9020135 COLLEGE NANME Science and Engineering - Faculty COLLEGE CODE FGSEN Swansea University 2021-02-23T15:25:52.2569513 2021-01-25T09:43:41.7202497 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering Kristian Ions 1 Harshinie Karunarathna 0000-0002-9087-3811 2 Dominic Reeve 0000-0003-1293-4743 3 Douglas Pender 4 56120__19324__a8233d0416b84c40969ecfe7931f7f39.pdf 56120.pdf 2021-02-17T17:40:02.7339321 Output 5155479 application/pdf Version of Record true © 2021 by the authors. This article is an open access article distributed under the terms of the Creative Commons Attribution (CC BY) license true eng https://creativecommons.org/licenses/by/4.0/
title Gravel Barrier Beach Morphodynamic Response to Extreme Conditions
spellingShingle Gravel Barrier Beach Morphodynamic Response to Extreme Conditions
Kristian Ions
Harshinie Karunarathna
Dominic Reeve
title_short Gravel Barrier Beach Morphodynamic Response to Extreme Conditions
title_full Gravel Barrier Beach Morphodynamic Response to Extreme Conditions
title_fullStr Gravel Barrier Beach Morphodynamic Response to Extreme Conditions
title_full_unstemmed Gravel Barrier Beach Morphodynamic Response to Extreme Conditions
title_sort Gravel Barrier Beach Morphodynamic Response to Extreme Conditions
author_id_str_mv 364f2d380fbdc5e825ee2cfdc2e10396
0d3d327a240d49b53c78e02b7c00e625
3e76fcc2bb3cde4ddee2c8edfd2f0082
author_id_fullname_str_mv 364f2d380fbdc5e825ee2cfdc2e10396_***_Kristian Ions
0d3d327a240d49b53c78e02b7c00e625_***_Harshinie Karunarathna
3e76fcc2bb3cde4ddee2c8edfd2f0082_***_Dominic Reeve
author Kristian Ions
Harshinie Karunarathna
Dominic Reeve
author2 Kristian Ions
Harshinie Karunarathna
Dominic Reeve
Douglas Pender
format Journal article
container_title Journal of Marine Science and Engineering
container_volume 9
container_issue 2
container_start_page 135
publishDate 2021
institution Swansea University
issn 2077-1312
doi_str_mv 10.3390/jmse9020135
publisher MDPI AG
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering
document_store_str 1
active_str 0
description Gravel beaches and barriers form a valuable natural protection for many shorelines. The paper presents a numerical modelling study of gravel barrier beach response to storm wave condi-tions. The XBeach non-hydrostatic model was set up in 1D mode to investigate barrier volume change and overwash under a wide range of unimodal and bimodal storm conditions and barrier cross sections. The numerical model was validated against conditions at Hurst Castle Spit, UK. The validated model is used to simulate the response of a range of gravel barrier cross sections under a wide selection of statistically significant storm wave and water level scenarios thus simulating an ensemble of barrier volume change and overwash. This ensemble of results was used to develop a simple parametric model for estimating barrier volume change during a given storm and water level condition under unimodal storm conditions. Numerical simulations of barrier response to bimodal storm conditions, which are a common occurrence in many parts of the UK were also investigated. It was found that barrier volume change and overwash from bimodal storms will be higher than that from unimodal storms if the swell percentage in the bimodal spectrum is greater than 40%. The model is demonstrated as providing a useful tool for estimating barrier volume change, a commonly used measure used in gravel barrier beach management.
published_date 2021-01-28T04:10:50Z
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