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Reflection Analysis of Impermeable Slopes under Bimodal Sea Conditions

Stephen Orimoloye, Harshinie Karunarathna Orcid Logo, Dominic Reeve Orcid Logo

Journal of Marine Science and Engineering, Volume: 8, Issue: 2, Start page: 133

Swansea University Authors: Stephen Orimoloye, Harshinie Karunarathna Orcid Logo, Dominic Reeve Orcid Logo

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DOI (Published version): 10.3390/jmse8020133

Abstract

Understanding of the reflection characteristics of coastal seawalls is crucial for design. Wave reflection can cause difficulties in small vessel manoeuvring at harbour entrances; this can cause damage to the toe of coastal structures by scouring. Previous studies have examined the reflection charac...

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Published in: Journal of Marine Science and Engineering
ISSN: 2077-1312
Published: MDPI AG 2020
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URI: https://cronfa.swan.ac.uk/Record/cronfa53864
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spelling 2020-10-23T11:40:42.1502264 v2 53864 2020-03-25 Reflection Analysis of Impermeable Slopes under Bimodal Sea Conditions 3107cf0289d3e787c77441caab6a1dc7 Stephen Orimoloye Stephen Orimoloye true false 0d3d327a240d49b53c78e02b7c00e625 0000-0002-9087-3811 Harshinie Karunarathna Harshinie Karunarathna true false 3e76fcc2bb3cde4ddee2c8edfd2f0082 0000-0003-1293-4743 Dominic Reeve Dominic Reeve true false 2020-03-25 FGSEN Understanding of the reflection characteristics of coastal seawalls is crucial for design. Wave reflection can cause difficulties in small vessel manoeuvring at harbour entrances; this can cause damage to the toe of coastal structures by scouring. Previous studies have examined the reflection characteristics of coastal seawalls under random wind-generated waves without considering the effects of wave bimodality created by the presence of swell waves. This present study focuses on the influence of random wave bimodality on the reflective characteristics of coastal seawalls. 823 experimental tests were conducted to examine the reflection performance of impermeable sloping seawalls under bimodal waves. Reflection coefficients were computed from each test. The analysis of the results suggests that both unimodal and bimodal waves give similar reflection characteristics. However, the reflection coefficient in bimodal sea states seems to be more prolonged than in the unimodal sea states. It was found that the reflection coefficients of coastal seawalls are strongly influenced by the seawall slope, the wave steepness, the relative water depth, and the surf similarity parameters. A new empirical reflection equation to describe the influence of wave bimodality on the reflection characteristics of coastal seawalls has been formulated based on this study. Journal Article Journal of Marine Science and Engineering 8 2 133 MDPI AG 2077-1312 coastal seawall; impermeable; bimodal seas; reflection coefficient; bimodality; wave steepness; swell percentages 18 2 2020 2020-02-18 10.3390/jmse8020133 COLLEGE NANME Science and Engineering - Faculty COLLEGE CODE FGSEN Swansea University 2020-10-23T11:40:42.1502264 2020-03-25T11:42:54.7732549 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering Stephen Orimoloye 1 Harshinie Karunarathna 0000-0002-9087-3811 2 Dominic Reeve 0000-0003-1293-4743 3 53864__16911__5dc6788189e549c7807c697cced6f781.pdf 53864.pdf 2020-03-25T11:44:21.1381764 Output 2834738 application/pdf Version of Record true This is an open access article distributed under the Creative Commons Attribution License (CC-BY). true eng https://creativecommons.org/licenses/by/4.0/
title Reflection Analysis of Impermeable Slopes under Bimodal Sea Conditions
spellingShingle Reflection Analysis of Impermeable Slopes under Bimodal Sea Conditions
Stephen Orimoloye
Harshinie Karunarathna
Dominic Reeve
title_short Reflection Analysis of Impermeable Slopes under Bimodal Sea Conditions
title_full Reflection Analysis of Impermeable Slopes under Bimodal Sea Conditions
title_fullStr Reflection Analysis of Impermeable Slopes under Bimodal Sea Conditions
title_full_unstemmed Reflection Analysis of Impermeable Slopes under Bimodal Sea Conditions
title_sort Reflection Analysis of Impermeable Slopes under Bimodal Sea Conditions
author_id_str_mv 3107cf0289d3e787c77441caab6a1dc7
0d3d327a240d49b53c78e02b7c00e625
3e76fcc2bb3cde4ddee2c8edfd2f0082
author_id_fullname_str_mv 3107cf0289d3e787c77441caab6a1dc7_***_Stephen Orimoloye
0d3d327a240d49b53c78e02b7c00e625_***_Harshinie Karunarathna
3e76fcc2bb3cde4ddee2c8edfd2f0082_***_Dominic Reeve
author Stephen Orimoloye
Harshinie Karunarathna
Dominic Reeve
author2 Stephen Orimoloye
Harshinie Karunarathna
Dominic Reeve
format Journal article
container_title Journal of Marine Science and Engineering
container_volume 8
container_issue 2
container_start_page 133
publishDate 2020
institution Swansea University
issn 2077-1312
doi_str_mv 10.3390/jmse8020133
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
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description Understanding of the reflection characteristics of coastal seawalls is crucial for design. Wave reflection can cause difficulties in small vessel manoeuvring at harbour entrances; this can cause damage to the toe of coastal structures by scouring. Previous studies have examined the reflection characteristics of coastal seawalls under random wind-generated waves without considering the effects of wave bimodality created by the presence of swell waves. This present study focuses on the influence of random wave bimodality on the reflective characteristics of coastal seawalls. 823 experimental tests were conducted to examine the reflection performance of impermeable sloping seawalls under bimodal waves. Reflection coefficients were computed from each test. The analysis of the results suggests that both unimodal and bimodal waves give similar reflection characteristics. However, the reflection coefficient in bimodal sea states seems to be more prolonged than in the unimodal sea states. It was found that the reflection coefficients of coastal seawalls are strongly influenced by the seawall slope, the wave steepness, the relative water depth, and the surf similarity parameters. A new empirical reflection equation to describe the influence of wave bimodality on the reflection characteristics of coastal seawalls has been formulated based on this study.
published_date 2020-02-18T04:07:03Z
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