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Wave Overtopping of smooth impermeable seawalls under Unidirectional Bimodal Sea Conditions

Stephen Orimoloye, Jose Horrillo-Caraballo Orcid Logo, Harshinie Karunarathna Orcid Logo, Dominic Reeve Orcid Logo

Coastal Engineering, Volume: 165

Swansea University Authors: Stephen Orimoloye, Jose Horrillo-Caraballo Orcid Logo, Harshinie Karunarathna Orcid Logo, Dominic Reeve Orcid Logo

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DOI (Published version): 10.1016/j.coastaleng.2020.103792

Abstract

Reduction of risks due to overtopping of coastal defences is an essential requirement for the design, management and adaptation of coastal structures. Extensive knowledge is available on the prediction of overtopping of smooth, sloping and vertical impermeable seawalls. The existing prediction metho...

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Published in: Coastal Engineering
ISSN: 0378-3839
Published: Elsevier BV 2021
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URI: https://cronfa.swan.ac.uk/Record/cronfa55426
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spelling 2021-12-02T11:16:24.6978843 v2 55426 2020-10-15 Wave Overtopping of smooth impermeable seawalls under Unidirectional Bimodal Sea Conditions 3107cf0289d3e787c77441caab6a1dc7 Stephen Orimoloye Stephen Orimoloye true false 5166f9cd40b7c8628375d3f22d1c473c 0000-0001-7694-3812 Jose Horrillo-Caraballo Jose Horrillo-Caraballo true false 0d3d327a240d49b53c78e02b7c00e625 0000-0002-9087-3811 Harshinie Karunarathna Harshinie Karunarathna true false 3e76fcc2bb3cde4ddee2c8edfd2f0082 0000-0003-1293-4743 Dominic Reeve Dominic Reeve true false 2020-10-15 FGSEN Reduction of risks due to overtopping of coastal defences is an essential requirement for the design, management and adaptation of coastal structures. Extensive knowledge is available on the prediction of overtopping of smooth, sloping and vertical impermeable seawalls. The existing prediction methods provide less certain guidance for combined wind and swell conditions. This experimental study focuses on overtopping characteristics of coastal seawalls under random bimodal waves. Both unimodal and corresponding bimodal conditions were simulated under different slopes and crest freeboards. Proportions of swell in the bimodal sea were varied in each test. Mean wave overtopping discharges were calculated for non-breaking random waves over at least 1000 waves. EurOtop formulae agree closely with our measurements from the unimodal experiments whereas they underpredict the observed wave overtopping rates for bimodal conditions even when using the recommended Tm−1,0 period for such cases. A modification to the EurOtop formula is proposed on the basis of the experimental results, to better capture the overtopping discharge under bimodal conditions. Journal Article Coastal Engineering 165 Elsevier BV 0378-3839 bimodal waves, wave overtopping, EurOtop, swell, storms, seawalls 1 4 2021 2021-04-01 10.1016/j.coastaleng.2020.103792 COLLEGE NANME Science and Engineering - Faculty COLLEGE CODE FGSEN Swansea University SU Library paid the OA fee (TA Institutional Deal) The Petroleum Technology Trust Fund (PTDF), Nigeria (Grant No. OSS/PHD/842/16). 2021-12-02T11:16:24.6978843 2020-10-15T17:45:51.7463747 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering Stephen Orimoloye 1 Jose Horrillo-Caraballo 0000-0001-7694-3812 2 Harshinie Karunarathna 0000-0002-9087-3811 3 Dominic Reeve 0000-0003-1293-4743 4 55426__18425__3e4dad4e6bf747fd97ff6b330353e0c5.pdf 55426.pdf 2020-10-15T17:47:35.1369652 Output 3227487 application/pdf Accepted Manuscript true 2021-10-13T00:00:00.0000000 © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license true eng http://creativecommons.org/licenses/by-nc-nd/4.0/
title Wave Overtopping of smooth impermeable seawalls under Unidirectional Bimodal Sea Conditions
spellingShingle Wave Overtopping of smooth impermeable seawalls under Unidirectional Bimodal Sea Conditions
Stephen Orimoloye
Jose Horrillo-Caraballo
Harshinie Karunarathna
Dominic Reeve
title_short Wave Overtopping of smooth impermeable seawalls under Unidirectional Bimodal Sea Conditions
title_full Wave Overtopping of smooth impermeable seawalls under Unidirectional Bimodal Sea Conditions
title_fullStr Wave Overtopping of smooth impermeable seawalls under Unidirectional Bimodal Sea Conditions
title_full_unstemmed Wave Overtopping of smooth impermeable seawalls under Unidirectional Bimodal Sea Conditions
title_sort Wave Overtopping of smooth impermeable seawalls under Unidirectional Bimodal Sea Conditions
author_id_str_mv 3107cf0289d3e787c77441caab6a1dc7
5166f9cd40b7c8628375d3f22d1c473c
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3e76fcc2bb3cde4ddee2c8edfd2f0082
author_id_fullname_str_mv 3107cf0289d3e787c77441caab6a1dc7_***_Stephen Orimoloye
5166f9cd40b7c8628375d3f22d1c473c_***_Jose Horrillo-Caraballo
0d3d327a240d49b53c78e02b7c00e625_***_Harshinie Karunarathna
3e76fcc2bb3cde4ddee2c8edfd2f0082_***_Dominic Reeve
author Stephen Orimoloye
Jose Horrillo-Caraballo
Harshinie Karunarathna
Dominic Reeve
author2 Stephen Orimoloye
Jose Horrillo-Caraballo
Harshinie Karunarathna
Dominic Reeve
format Journal article
container_title Coastal Engineering
container_volume 165
publishDate 2021
institution Swansea University
issn 0378-3839
doi_str_mv 10.1016/j.coastaleng.2020.103792
publisher Elsevier BV
college_str Faculty of Science and Engineering
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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
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description Reduction of risks due to overtopping of coastal defences is an essential requirement for the design, management and adaptation of coastal structures. Extensive knowledge is available on the prediction of overtopping of smooth, sloping and vertical impermeable seawalls. The existing prediction methods provide less certain guidance for combined wind and swell conditions. This experimental study focuses on overtopping characteristics of coastal seawalls under random bimodal waves. Both unimodal and corresponding bimodal conditions were simulated under different slopes and crest freeboards. Proportions of swell in the bimodal sea were varied in each test. Mean wave overtopping discharges were calculated for non-breaking random waves over at least 1000 waves. EurOtop formulae agree closely with our measurements from the unimodal experiments whereas they underpredict the observed wave overtopping rates for bimodal conditions even when using the recommended Tm−1,0 period for such cases. A modification to the EurOtop formula is proposed on the basis of the experimental results, to better capture the overtopping discharge under bimodal conditions.
published_date 2021-04-01T04:09:37Z
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score 11.016235

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