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Gravel Barrier Beach Morphodynamic Response to Storm Events / KRISTIAN IONS

Swansea University Author: KRISTIAN IONS

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Abstract

Gravel beaches and barriers form a valuable natural protection for many shorelines. Gravel beach response to waves has been studied extensively, for regular and irregular waves, but there is little reported investigation of beach response to bimodal wave conditions, quite commonly experienced at mid...

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Published: Swansea 2021
Institution: Swansea University
Degree level: Master of Research
Degree name: MSc by Research
Supervisor: Karunarathna, Harshinie
URI: https://cronfa.swan.ac.uk/Record/cronfa58789
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first_indexed 2021-11-25T14:02:20Z
last_indexed 2021-11-26T04:17:00Z
id cronfa58789
recordtype RisThesis
fullrecord <?xml version="1.0"?><rfc1807><datestamp>2021-11-25T14:24:48.7571919</datestamp><bib-version>v2</bib-version><id>58789</id><entry>2021-11-25</entry><title>Gravel Barrier Beach Morphodynamic Response to Storm Events</title><swanseaauthors><author><sid>0eaeea3a999ce1ef38ade9b3b5f26a22</sid><firstname>KRISTIAN</firstname><surname>IONS</surname><name>KRISTIAN IONS</name><active>true</active><ethesisStudent>false</ethesisStudent></author></swanseaauthors><date>2021-11-25</date><abstract>Gravel beaches and barriers form a valuable natural protection for many shorelines. Gravel beach response to waves has been studied extensively, for regular and irregular waves, but there is little reported investigation of beach response to bimodal wave conditions, quite commonly experienced at midlatitudes. The paper presents a numerical modelling study of gravel barrier beach response to storm wave conditions. 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 realisations 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. Attempts were also made to model overwash and crest changes of barriers, however further study Is required. Numerical simulations of barrier response to bimodal storm conditions, which are a common occurrence in many parts of the UK, reveals that barrier volume change and overwash from bimodal storms will be higher than that from unimodal storms if the swell percentage is greater than 40%. The limitations of the modelling approach and the model results are noted. The model is demonstrated as providing a useful tool for estimating barrier volume change, a commonly used measure used in gravel barrier beach management.</abstract><type>E-Thesis</type><journal/><volume/><journalNumber/><paginationStart/><paginationEnd/><publisher/><placeOfPublication>Swansea</placeOfPublication><isbnPrint/><isbnElectronic/><issnPrint/><issnElectronic/><keywords>Coastal Engineering, XBeach, Computational Modelling, Morphodynamics</keywords><publishedDay>25</publishedDay><publishedMonth>11</publishedMonth><publishedYear>2021</publishedYear><publishedDate>2021-11-25</publishedDate><doi/><url/><notes>A selection of third party content is redacted or is partially redacted from this thesis due to copyright restrictions.ORCiD identifier: https://orcid.org/0000-0001-7659-0586</notes><college>COLLEGE NANME</college><CollegeCode>COLLEGE CODE</CollegeCode><institution>Swansea University</institution><supervisor>Karunarathna, Harshinie</supervisor><degreelevel>Master of Research</degreelevel><degreename>MSc by Research</degreename><degreesponsorsfunders>KESS II</degreesponsorsfunders><apcterm/><lastEdited>2021-11-25T14:24:48.7571919</lastEdited><Created>2021-11-25T13:58:38.0864788</Created><path><level id="1">Faculty of Science and Engineering</level><level id="2">School of Engineering and Applied Sciences - Uncategorised</level></path><authors><author><firstname>KRISTIAN</firstname><surname>IONS</surname><order>1</order></author></authors><documents><document><filename>58789__21690__c347c1f8535642b68ee1cfa48206b5b4.pdf</filename><originalFilename>Ions_Kristian_D_MSc_by_Research_Final_Redacted.pdf</originalFilename><uploaded>2021-11-25T14:21:15.4620256</uploaded><type>Output</type><contentLength>5917301</contentLength><contentType>application/pdf</contentType><version>Redacted version - open access</version><cronfaStatus>true</cronfaStatus><documentNotes>Copyright: The author, Kristian D. Ions, 2021.</documentNotes><copyrightCorrect>true</copyrightCorrect><language>eng</language></document></documents><OutputDurs/></rfc1807>
spelling 2021-11-25T14:24:48.7571919 v2 58789 2021-11-25 Gravel Barrier Beach Morphodynamic Response to Storm Events 0eaeea3a999ce1ef38ade9b3b5f26a22 KRISTIAN IONS KRISTIAN IONS true false 2021-11-25 Gravel beaches and barriers form a valuable natural protection for many shorelines. Gravel beach response to waves has been studied extensively, for regular and irregular waves, but there is little reported investigation of beach response to bimodal wave conditions, quite commonly experienced at midlatitudes. The paper presents a numerical modelling study of gravel barrier beach response to storm wave conditions. 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 realisations 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. Attempts were also made to model overwash and crest changes of barriers, however further study Is required. Numerical simulations of barrier response to bimodal storm conditions, which are a common occurrence in many parts of the UK, reveals that barrier volume change and overwash from bimodal storms will be higher than that from unimodal storms if the swell percentage is greater than 40%. The limitations of the modelling approach and the model results are noted. The model is demonstrated as providing a useful tool for estimating barrier volume change, a commonly used measure used in gravel barrier beach management. E-Thesis Swansea Coastal Engineering, XBeach, Computational Modelling, Morphodynamics 25 11 2021 2021-11-25 A selection of third party content is redacted or is partially redacted from this thesis due to copyright restrictions.ORCiD identifier: https://orcid.org/0000-0001-7659-0586 COLLEGE NANME COLLEGE CODE Swansea University Karunarathna, Harshinie Master of Research MSc by Research KESS II 2021-11-25T14:24:48.7571919 2021-11-25T13:58:38.0864788 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised KRISTIAN IONS 1 58789__21690__c347c1f8535642b68ee1cfa48206b5b4.pdf Ions_Kristian_D_MSc_by_Research_Final_Redacted.pdf 2021-11-25T14:21:15.4620256 Output 5917301 application/pdf Redacted version - open access true Copyright: The author, Kristian D. Ions, 2021. true eng
title Gravel Barrier Beach Morphodynamic Response to Storm Events
spellingShingle Gravel Barrier Beach Morphodynamic Response to Storm Events
KRISTIAN IONS
title_short Gravel Barrier Beach Morphodynamic Response to Storm Events
title_full Gravel Barrier Beach Morphodynamic Response to Storm Events
title_fullStr Gravel Barrier Beach Morphodynamic Response to Storm Events
title_full_unstemmed Gravel Barrier Beach Morphodynamic Response to Storm Events
title_sort Gravel Barrier Beach Morphodynamic Response to Storm Events
author_id_str_mv 0eaeea3a999ce1ef38ade9b3b5f26a22
author_id_fullname_str_mv 0eaeea3a999ce1ef38ade9b3b5f26a22_***_KRISTIAN IONS
author KRISTIAN IONS
author2 KRISTIAN IONS
format E-Thesis
publishDate 2021
institution Swansea University
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 Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
document_store_str 1
active_str 0
description Gravel beaches and barriers form a valuable natural protection for many shorelines. Gravel beach response to waves has been studied extensively, for regular and irregular waves, but there is little reported investigation of beach response to bimodal wave conditions, quite commonly experienced at midlatitudes. The paper presents a numerical modelling study of gravel barrier beach response to storm wave conditions. 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 realisations 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. Attempts were also made to model overwash and crest changes of barriers, however further study Is required. Numerical simulations of barrier response to bimodal storm conditions, which are a common occurrence in many parts of the UK, reveals that barrier volume change and overwash from bimodal storms will be higher than that from unimodal storms if the swell percentage is greater than 40%. The limitations of the modelling approach and the model results are noted. 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 2021-11-25T04:15:36Z
_version_ 1763754048634224640
score 11.01628

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