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A new approach for incorporating sea-level rise in hybrid 2D/one-line shoreline models

Hybrid 2D/one-line shoreline models, which typically apply a finite volume approach to simulate sediment transport and the one-line theory to update the shoreline morphology, are being increasingly applied over meso timescales (10(1) to 10(2) years) to inform coastal management. The one-line theory...

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Autor principal: Seenath, Avidesh
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9613980/
https://www.ncbi.nlm.nih.gov/pubmed/36302833
http://dx.doi.org/10.1038/s41598-022-23043-w
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author Seenath, Avidesh
author_facet Seenath, Avidesh
author_sort Seenath, Avidesh
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description Hybrid 2D/one-line shoreline models, which typically apply a finite volume approach to simulate sediment transport and the one-line theory to update the shoreline morphology, are being increasingly applied over meso timescales (10(1) to 10(2) years) to inform coastal management. The one-line theory assumption of a constant closure depth prevents these models from considering the effects of sea-level rise in the shoreline morphology update. Sea-level rise, an endogenous driving factor of meso timescale coastal behaviour, influences the closure depth through its effects on the wave climate. This paper presents a new hybrid 2D/one-line approach that enables a time-varying closure depth in response to annual variations in wave climate as a solution for mirroring the effects of sea-level rise on the coastal profile and associated shoreline evolution. This new hybrid approach is applied to hindcast meso timescale shoreline evolution in a sandy coastal system and compared against the traditional hybrid 2D/one-line approach. Results show that the traditional hybrid approach gives the most accurate predictions whereas the new hybrid approach overpredicts shoreline erosion. However, this overprediction is attributed to net closure depth overestimation. This attribution gives confidence that the shoreline response to the time-varying closure depth specified is within expectations since closure depth overestimation increases offshore sediment transport in shoreline models. Therefore, it is likely that enabling a time-varying closure depth in hybrid 2D/one-line models may improve meso timescale shoreline predictions under sea-level rise if closure depths can be accurately prescribed over time.
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spelling pubmed-96139802022-10-29 A new approach for incorporating sea-level rise in hybrid 2D/one-line shoreline models Seenath, Avidesh Sci Rep Article Hybrid 2D/one-line shoreline models, which typically apply a finite volume approach to simulate sediment transport and the one-line theory to update the shoreline morphology, are being increasingly applied over meso timescales (10(1) to 10(2) years) to inform coastal management. The one-line theory assumption of a constant closure depth prevents these models from considering the effects of sea-level rise in the shoreline morphology update. Sea-level rise, an endogenous driving factor of meso timescale coastal behaviour, influences the closure depth through its effects on the wave climate. This paper presents a new hybrid 2D/one-line approach that enables a time-varying closure depth in response to annual variations in wave climate as a solution for mirroring the effects of sea-level rise on the coastal profile and associated shoreline evolution. This new hybrid approach is applied to hindcast meso timescale shoreline evolution in a sandy coastal system and compared against the traditional hybrid 2D/one-line approach. Results show that the traditional hybrid approach gives the most accurate predictions whereas the new hybrid approach overpredicts shoreline erosion. However, this overprediction is attributed to net closure depth overestimation. This attribution gives confidence that the shoreline response to the time-varying closure depth specified is within expectations since closure depth overestimation increases offshore sediment transport in shoreline models. Therefore, it is likely that enabling a time-varying closure depth in hybrid 2D/one-line models may improve meso timescale shoreline predictions under sea-level rise if closure depths can be accurately prescribed over time. Nature Publishing Group UK 2022-10-27 /pmc/articles/PMC9613980/ /pubmed/36302833 http://dx.doi.org/10.1038/s41598-022-23043-w Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Seenath, Avidesh
A new approach for incorporating sea-level rise in hybrid 2D/one-line shoreline models
title A new approach for incorporating sea-level rise in hybrid 2D/one-line shoreline models
title_full A new approach for incorporating sea-level rise in hybrid 2D/one-line shoreline models
title_fullStr A new approach for incorporating sea-level rise in hybrid 2D/one-line shoreline models
title_full_unstemmed A new approach for incorporating sea-level rise in hybrid 2D/one-line shoreline models
title_short A new approach for incorporating sea-level rise in hybrid 2D/one-line shoreline models
title_sort new approach for incorporating sea-level rise in hybrid 2d/one-line shoreline models
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9613980/
https://www.ncbi.nlm.nih.gov/pubmed/36302833
http://dx.doi.org/10.1038/s41598-022-23043-w
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