Morphological changes, beach inundation and overwash caused by an extreme storm on a low-lying embayed beach bounded by a dune system (NW Mediterranean)

14 pages, 13 figures, 4 tables

Detalles Bibliográficos
Autores: Durán, Ruth, Guillén, Jorge, Ruiz, Antonio, Jiménez-Quintana, José Antonio, Sagristà, Enric
Tipo de recurso: artículo
Fecha de publicación:2016
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/143571
Acceso en línea:http://hdl.handle.net/10261/143571
Access Level:acceso abierto
Palabra clave:LiDAR
Vulnerability
Shoreline erosion and accretion
Sediment budget
id ES_2ae62dbfbbd6746ae4f0a307cac04019
oai_identifier_str oai:digital.csic.es:10261/143571
network_acronym_str ES
network_name_str España
repository_id_str
spelling Morphological changes, beach inundation and overwash caused by an extreme storm on a low-lying embayed beach bounded by a dune system (NW Mediterranean)Durán, RuthGuillén, JorgeRuiz, AntonioJiménez-Quintana, José AntonioSagristà, EnricLiDARVulnerabilityShoreline erosion and accretionSediment budget14 pages, 13 figures, 4 tablesThe geomorphological evolution of a low-lying, micro-tidal sandy beach in the western Mediterranean, Pals beach, was characterized using airborne Light Detection and Ranging (LiDAR) data. Data were collected in prior to and six months after the impact of an extreme storm with a return period of approx. 50 years, with the aim of characterizing the beach's response to the storm. The use of repeated high-resolution topographic data to quantify beach geomorphic changes has allowed assessment of the accuracy of different proxies for estimating beach volume changes. Results revealed that changes in the shoreline position cannot accurately reproduce beach volume changes on low-lying beaches where overwash processes are significant. Observations also suggested that volume estimations from beach profiles do not accurately represent subaerial volume changes at large profile distances on beaches with significant alongshore geomorphological variability. Accordingly, the segmentation of the beach into regularly spaced bins is proposed to assess alongshore variations in the beach volume with the accuracy of the topographic data. The morphological evolution of Pals beach during the study period showed a net shoreline retreat (− 4 m) and a significant sediment gain on the subaerial beach (+ 7.5 m/m). The net gain of sediment is mostly due to the impact of the extreme storm, driving significant overwash processes that transport sediment landwards, increasing volume on the backshore and dunes. The increase of volume on the foreshore and the presence of cuspate morphologies along the shoreline also evidence post-storm beach recovery. Observed morphological changes exhibit a high variability along the beach related to variations in beach morphology. Changes in the morphology and migration of megacusps result in a high variability in the shoreline position and foreshore volume changes. On the other hand, larger morphological changes on the backshore and larger inundation distances occur when the beach and the dunes are lower, favouring the dominance of overwash. The observed storm-induced morphological changes differ from predicted beach storm impacts because of spatial and temporal variations in the beach morphology, suggesting that detailed morphological parameters and indicators used for predicting beach vulnerability to storms should be regularly updated in order to represent the pre-storm beach conditions. Finally, observed morphological changes in Pals Bay evidenced a different behaviour between natural and urban areas, with better post-storm beach recovery on natural areas where the beach is not artificially narrowedIt was supported by the FORMED (CGL2012-33989) Project funded by the Spanish Ministry of Economy and Competitiveness. R. Durán is supported by a CSIC JAE-Doc contract co-funded by the FSE (Grant No. JAEDOC035). JAJ was funded by the RISC-KIT (Grant No. 603458) and PaiRisC-M (CTM2011-29808) projects funded by the European Union and the Spanish Ministry of Economy and Competitiveness, respectively.Peer ReviewedInternational Geosynthetics SocietyEuropean CommissionConsejo Superior de Investigaciones Científicas (España)Ministerio de Economía y Competitividad (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2017201720162017info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/143571reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttps://dx.doi.org/10.1016/j.geomorph.2016.09.012Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1435712026-05-22T06:33:51Z
dc.title.none.fl_str_mv Morphological changes, beach inundation and overwash caused by an extreme storm on a low-lying embayed beach bounded by a dune system (NW Mediterranean)
title Morphological changes, beach inundation and overwash caused by an extreme storm on a low-lying embayed beach bounded by a dune system (NW Mediterranean)
spellingShingle Morphological changes, beach inundation and overwash caused by an extreme storm on a low-lying embayed beach bounded by a dune system (NW Mediterranean)
Durán, Ruth
LiDAR
Vulnerability
Shoreline erosion and accretion
Sediment budget
title_short Morphological changes, beach inundation and overwash caused by an extreme storm on a low-lying embayed beach bounded by a dune system (NW Mediterranean)
title_full Morphological changes, beach inundation and overwash caused by an extreme storm on a low-lying embayed beach bounded by a dune system (NW Mediterranean)
title_fullStr Morphological changes, beach inundation and overwash caused by an extreme storm on a low-lying embayed beach bounded by a dune system (NW Mediterranean)
title_full_unstemmed Morphological changes, beach inundation and overwash caused by an extreme storm on a low-lying embayed beach bounded by a dune system (NW Mediterranean)
title_sort Morphological changes, beach inundation and overwash caused by an extreme storm on a low-lying embayed beach bounded by a dune system (NW Mediterranean)
dc.creator.none.fl_str_mv Durán, Ruth
Guillén, Jorge
Ruiz, Antonio
Jiménez-Quintana, José Antonio
Sagristà, Enric
author Durán, Ruth
author_facet Durán, Ruth
Guillén, Jorge
Ruiz, Antonio
Jiménez-Quintana, José Antonio
Sagristà, Enric
author_role author
author2 Guillén, Jorge
Ruiz, Antonio
Jiménez-Quintana, José Antonio
Sagristà, Enric
author2_role author
author
author
author
dc.contributor.none.fl_str_mv European Commission
Consejo Superior de Investigaciones Científicas (España)
Ministerio de Economía y Competitividad (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv LiDAR
Vulnerability
Shoreline erosion and accretion
Sediment budget
topic LiDAR
Vulnerability
Shoreline erosion and accretion
Sediment budget
description 14 pages, 13 figures, 4 tables
publishDate 2016
dc.date.none.fl_str_mv 2016
2017
2017
2017
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/143571
url http://hdl.handle.net/10261/143571
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://dx.doi.org/10.1016/j.geomorph.2016.09.012
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv International Geosynthetics Society
publisher.none.fl_str_mv International Geosynthetics Society
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869405101251100673
score 15,81155

Similares en LA Referencia