Shoreline retreat and free overhang in overdeveloped tombolo behind detached breakwaters: empirical, semi-analytical and numerical approach
Multiple detached breakwaters with narrow gaps have been constructed to dissipate wave energy to a beach and to promote salient or tombolo in the lee for shore protection since the 1960s. Although geometric parameters (breakwater length and distance offshore) are operative for the preliminary design...
| Autores: | , , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universidad de Cantabria (UC) |
| Repositorio: | UCrea Repositorio Abierto de la Universidad de Cantabria |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.unican.es:10902/35302 |
| Acceso en línea: | https://hdl.handle.net/10902/35302 |
| Access Level: | acceso abierto |
| Palabra clave: | Multiple detached breakwaters Salient and tombolo Parabolic model Semi-analytical approach Estimation of shoreline retreat |
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Shoreline retreat and free overhang in overdeveloped tombolo behind detached breakwaters: empirical, semi-analytical and numerical approachLim, ChangbinLee, Jung L.Hsu, John R.C.Multiple detached breakwatersSalient and tomboloParabolic modelSemi-analytical approachEstimation of shoreline retreatMultiple detached breakwaters with narrow gaps have been constructed to dissipate wave energy to a beach and to promote salient or tombolo in the lee for shore protection since the 1960s. Although geometric parameters (breakwater length and distance offshore) are operative for the preliminary design of these structures, neither shoreline retreat from its initial position in the middle of each compartment was assessed, empirically or semi analytically, nor was the tombolo´s overhang length along the structure quantified, if it`s overdeveloped. In this study, prototype data are collected to derive empirical relationship for a salient and tombolo geometry in static equilibrium. A semi-analytical approach is then used to derive algebraic equation for estimating shoreline retreat from an initial position, for three stages of shoreline planform, from a salient to initial tombolo and to an over developed tombolo with free overhang. The results of this new approach are verified using empirical data and an approximate equation for shoreline retreat derived from the numerical results extended from the results of XBeach model. This also enables the backtracking to the existing shoreline, where extra hard protection is constructed in the middle of a compartment between consecutive DBWs, to its initial position. To mitigate the scenario of erosion, a preferred alternative combining nourishment with parabolic model is demonstrated to produce a stable beach with adequate beach bufferThis research is also partially supported by Korea Institute of Marine Science & Technology Promotion (KIMST), funded by the Ministry of Ocean and Fisheries, Korea (RS-2023-00256687).Elsevier LtdUniversidad de Cantabria20252025-01-01journal articlehttp://purl.org/coar/resource_type/c_6501NAhttp://purl.org/coar/version/c_be7fb7dd8ff6fe43info:eu-repo/semantics/articlehttps://hdl.handle.net/10902/35302Applied Ocean Research, 2025, 154, 104385reponame:UCrea Repositorio Abierto de la Universidad de Cantabriainstname:Universidad de Cantabria (UC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:repositorio.unican.es:10902/353022026-06-02T12:39:31Z |
| dc.title.none.fl_str_mv |
Shoreline retreat and free overhang in overdeveloped tombolo behind detached breakwaters: empirical, semi-analytical and numerical approach |
| title |
Shoreline retreat and free overhang in overdeveloped tombolo behind detached breakwaters: empirical, semi-analytical and numerical approach |
| spellingShingle |
Shoreline retreat and free overhang in overdeveloped tombolo behind detached breakwaters: empirical, semi-analytical and numerical approach Lim, Changbin Multiple detached breakwaters Salient and tombolo Parabolic model Semi-analytical approach Estimation of shoreline retreat |
| title_short |
Shoreline retreat and free overhang in overdeveloped tombolo behind detached breakwaters: empirical, semi-analytical and numerical approach |
| title_full |
Shoreline retreat and free overhang in overdeveloped tombolo behind detached breakwaters: empirical, semi-analytical and numerical approach |
| title_fullStr |
Shoreline retreat and free overhang in overdeveloped tombolo behind detached breakwaters: empirical, semi-analytical and numerical approach |
| title_full_unstemmed |
Shoreline retreat and free overhang in overdeveloped tombolo behind detached breakwaters: empirical, semi-analytical and numerical approach |
| title_sort |
Shoreline retreat and free overhang in overdeveloped tombolo behind detached breakwaters: empirical, semi-analytical and numerical approach |
| dc.creator.none.fl_str_mv |
Lim, Changbin Lee, Jung L. Hsu, John R.C. |
| author |
Lim, Changbin |
| author_facet |
Lim, Changbin Lee, Jung L. Hsu, John R.C. |
| author_role |
author |
| author2 |
Lee, Jung L. Hsu, John R.C. |
| author2_role |
author author |
| dc.contributor.none.fl_str_mv |
Universidad de Cantabria |
| dc.subject.none.fl_str_mv |
Multiple detached breakwaters Salient and tombolo Parabolic model Semi-analytical approach Estimation of shoreline retreat |
| topic |
Multiple detached breakwaters Salient and tombolo Parabolic model Semi-analytical approach Estimation of shoreline retreat |
| description |
Multiple detached breakwaters with narrow gaps have been constructed to dissipate wave energy to a beach and to promote salient or tombolo in the lee for shore protection since the 1960s. Although geometric parameters (breakwater length and distance offshore) are operative for the preliminary design of these structures, neither shoreline retreat from its initial position in the middle of each compartment was assessed, empirically or semi analytically, nor was the tombolo´s overhang length along the structure quantified, if it`s overdeveloped. In this study, prototype data are collected to derive empirical relationship for a salient and tombolo geometry in static equilibrium. A semi-analytical approach is then used to derive algebraic equation for estimating shoreline retreat from an initial position, for three stages of shoreline planform, from a salient to initial tombolo and to an over developed tombolo with free overhang. The results of this new approach are verified using empirical data and an approximate equation for shoreline retreat derived from the numerical results extended from the results of XBeach model. This also enables the backtracking to the existing shoreline, where extra hard protection is constructed in the middle of a compartment between consecutive DBWs, to its initial position. To mitigate the scenario of erosion, a preferred alternative combining nourishment with parabolic model is demonstrated to produce a stable beach with adequate beach buffer |
| publishDate |
2025 |
| dc.date.none.fl_str_mv |
2025 2025-01-01 |
| dc.type.none.fl_str_mv |
journal article http://purl.org/coar/resource_type/c_6501 NA http://purl.org/coar/version/c_be7fb7dd8ff6fe43 |
| dc.type.openaire.fl_str_mv |
info:eu-repo/semantics/article |
| format |
article |
| dc.identifier.none.fl_str_mv |
https://hdl.handle.net/10902/35302 |
| url |
https://hdl.handle.net/10902/35302 |
| dc.language.none.fl_str_mv |
Inglés eng |
| language_invalid_str_mv |
Inglés |
| language |
eng |
| dc.rights.none.fl_str_mv |
open access http://purl.org/coar/access_right/c_abf2 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
| dc.rights.openaire.fl_str_mv |
info:eu-repo/semantics/openAccess |
| rights_invalid_str_mv |
open access http://purl.org/coar/access_right/c_abf2 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
| eu_rights_str_mv |
openAccess |
| dc.publisher.none.fl_str_mv |
Elsevier Ltd |
| publisher.none.fl_str_mv |
Elsevier Ltd |
| dc.source.none.fl_str_mv |
Applied Ocean Research, 2025, 154, 104385 reponame:UCrea Repositorio Abierto de la Universidad de Cantabria instname:Universidad de Cantabria (UC) |
| instname_str |
Universidad de Cantabria (UC) |
| reponame_str |
UCrea Repositorio Abierto de la Universidad de Cantabria |
| collection |
UCrea Repositorio Abierto de la Universidad de Cantabria |
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|
| repository.mail.fl_str_mv |
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1869421933786824704 |
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15,81155 |