Long-term morphodynamics of a coupled shelf-shoreline system forced by waves and tides, a model approach

Sand ridges, with length scales of several km, are prominent features of the seafloor landscape of many sandy continental shelves. Knowledge about the extent to which these ridges influence the large-scale (i.e., decadal and kilometer scales) morphodynamic evolution of the adjacent shoreline and vic...

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Detalles Bibliográficos
Autores: Nnafie, Abdel, de Swart, Huib E., Falqués Serra, Albert|||0000-0002-3945-1509, Calvete Manrique, Daniel|||0000-0002-5402-5137
Tipo de recurso: artículo
Fecha de publicación:2021
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/358860
Acceso en línea:https://hdl.handle.net/2117/358860
https://dx.doi.org/10.1029/2021JF006315
Access Level:acceso abierto
Palabra clave:Sand
Sand dunes
Seashore
Sand ridges
Seafloor landscape
Morphodynamic
Wave patterns
Shoreline
Sorra
Dunes
Costa del mar
Àrees temàtiques de la UPC::Física
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network_acronym_str ES
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repository_id_str
spelling Long-term morphodynamics of a coupled shelf-shoreline system forced by waves and tides, a model approachNnafie, Abdelde Swart, Huib E.Falqués Serra, Albert|||0000-0002-3945-1509Calvete Manrique, Daniel|||0000-0002-5402-5137SandSand dunesSeashoreSand ridgesSeafloor landscapeMorphodynamicWave patternsShorelineSorraDunesCosta del marÀrees temàtiques de la UPC::FísicaSand ridges, with length scales of several km, are prominent features of the seafloor landscape of many sandy continental shelves. Knowledge about the extent to which these ridges influence the large-scale (i.e., decadal and kilometer scales) morphodynamic evolution of the adjacent shoreline and vice versa (shelf-shoreline morphodynamic coupling) is limited. The present work aims at quantifying this coupling by using a coupled nonlinear shelf-shoreline model forced by tides and different wave conditions. Model results show that the presence of sand ridges on the shelf creates longshore non-uniform wave patterns, which act as a forcing template for the morphodynamic development of the shoreline. The shelf-shoreline coupling primarily works one way, meaning that the morphodynamic evolution of the shelf affects the evolution of the shoreline. When wave propagation is predominantly aligned with the long axis of the shelf ridges, the forced shoreline undulations are so prominent, that they affect the shelf morphology (significant two-way coupling). Moreover, for those waves, the longshore spacing of the ridges is strongly imprinted on the shoreline morphology. Weaker shoreline undulations develop for waves that propagate more across the ridges and the weakest for time-varying wave conditions with large variability in their angles of propagation. Model results compare fairly well with observations. Physical mechanisms underlying the different morphodynamic responses of the coupled shelf-shoreline system to different wave conditions are also given.American Geophysical Union (AGU)20212021-12-0120212021-12-20journal articlehttp://purl.org/coar/resource_type/c_6501AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/358860https://dx.doi.org/10.1029/2021JF006315reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-NoDerivs 3.0 Spainhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/3588602026-05-27T15:37:01Z
dc.title.none.fl_str_mv Long-term morphodynamics of a coupled shelf-shoreline system forced by waves and tides, a model approach
title Long-term morphodynamics of a coupled shelf-shoreline system forced by waves and tides, a model approach
spellingShingle Long-term morphodynamics of a coupled shelf-shoreline system forced by waves and tides, a model approach
Nnafie, Abdel
Sand
Sand dunes
Seashore
Sand ridges
Seafloor landscape
Morphodynamic
Wave patterns
Shoreline
Sorra
Dunes
Costa del mar
Àrees temàtiques de la UPC::Física
title_short Long-term morphodynamics of a coupled shelf-shoreline system forced by waves and tides, a model approach
title_full Long-term morphodynamics of a coupled shelf-shoreline system forced by waves and tides, a model approach
title_fullStr Long-term morphodynamics of a coupled shelf-shoreline system forced by waves and tides, a model approach
title_full_unstemmed Long-term morphodynamics of a coupled shelf-shoreline system forced by waves and tides, a model approach
title_sort Long-term morphodynamics of a coupled shelf-shoreline system forced by waves and tides, a model approach
dc.creator.none.fl_str_mv Nnafie, Abdel
de Swart, Huib E.
Falqués Serra, Albert|||0000-0002-3945-1509
Calvete Manrique, Daniel|||0000-0002-5402-5137
author Nnafie, Abdel
author_facet Nnafie, Abdel
de Swart, Huib E.
Falqués Serra, Albert|||0000-0002-3945-1509
Calvete Manrique, Daniel|||0000-0002-5402-5137
author_role author
author2 de Swart, Huib E.
Falqués Serra, Albert|||0000-0002-3945-1509
Calvete Manrique, Daniel|||0000-0002-5402-5137
author2_role author
author
author
dc.subject.none.fl_str_mv Sand
Sand dunes
Seashore
Sand ridges
Seafloor landscape
Morphodynamic
Wave patterns
Shoreline
Sorra
Dunes
Costa del mar
Àrees temàtiques de la UPC::Física
topic Sand
Sand dunes
Seashore
Sand ridges
Seafloor landscape
Morphodynamic
Wave patterns
Shoreline
Sorra
Dunes
Costa del mar
Àrees temàtiques de la UPC::Física
description Sand ridges, with length scales of several km, are prominent features of the seafloor landscape of many sandy continental shelves. Knowledge about the extent to which these ridges influence the large-scale (i.e., decadal and kilometer scales) morphodynamic evolution of the adjacent shoreline and vice versa (shelf-shoreline morphodynamic coupling) is limited. The present work aims at quantifying this coupling by using a coupled nonlinear shelf-shoreline model forced by tides and different wave conditions. Model results show that the presence of sand ridges on the shelf creates longshore non-uniform wave patterns, which act as a forcing template for the morphodynamic development of the shoreline. The shelf-shoreline coupling primarily works one way, meaning that the morphodynamic evolution of the shelf affects the evolution of the shoreline. When wave propagation is predominantly aligned with the long axis of the shelf ridges, the forced shoreline undulations are so prominent, that they affect the shelf morphology (significant two-way coupling). Moreover, for those waves, the longshore spacing of the ridges is strongly imprinted on the shoreline morphology. Weaker shoreline undulations develop for waves that propagate more across the ridges and the weakest for time-varying wave conditions with large variability in their angles of propagation. Model results compare fairly well with observations. Physical mechanisms underlying the different morphodynamic responses of the coupled shelf-shoreline system to different wave conditions are also given.
publishDate 2021
dc.date.none.fl_str_mv 2021
2021-12-01
2021
2021-12-20
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
AM
http://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/358860
https://dx.doi.org/10.1029/2021JF006315
url https://hdl.handle.net/2117/358860
https://dx.doi.org/10.1029/2021JF006315
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-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
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-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Geophysical Union (AGU)
publisher.none.fl_str_mv American Geophysical Union (AGU)
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869422730781130752
score 15,300719

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