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spelling ftccsdartic:oai:HAL:hal-01242105v1 2023-05-15T17:41:38+02:00 A modeling-based analysis of the flooding associated with Xynthia, central Bay of Biscay Bertin, Xavier Li, Kai Roland, Aron Zhang, Yinglong J. François Breilh, Jean Chaumillon, Eric LIttoral ENvironnement et Sociétés - UMRi 7266 (LIENSs) Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS) National Laboratory for Civil Engineering Lisboa (LNEC) National Laboratory for Civil Engineering (LNEC) BGS IT&E GmbH Virginia Institute of Marine Science (VIMS) 2014-09-26 https://hal.archives-ouvertes.fr/hal-01242105 https://doi.org/10.1016/j.coastaleng.2014.08.013 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.coastaleng.2014.08.013 hal-01242105 https://hal.archives-ouvertes.fr/hal-01242105 doi:10.1016/j.coastaleng.2014.08.013 ISSN: 0378-3839 Coastal Engineering https://hal.archives-ouvertes.fr/hal-01242105 Coastal Engineering, Elsevier, 2014, 94, pp.80-89. ⟨10.1016/j.coastaleng.2014.08.013⟩ [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2014 ftccsdartic https://doi.org/10.1016/j.coastaleng.2014.08.013 2021-12-19T02:49:54Z International audience Storm-induced coastal flooding is among the most destructive natural disasters, as seen recently in the Bay of Bengal, the Gulf of Mexico and the Philippines. This study presents a high resolution hindcast of the flooding associated with Xynthia, a mid-latitude storm that severely hit the central part of the Bay of Biscay in February 2010. A 2DH fully coupled modeling system is applied to the NorthEast Atlantic Ocean, with a resolution locally reaching a few meters along the coastline of the study area. Such a fine resolution was required to adequately represent the dikes and the barriers that usually prevent the area from flooding, but results in a N1,700,000 element unstructured grid. The comparison with the available data reveals that waves and water levels are reproduced with normalized errors of the order of 10% and 5%, respectively. The extension of the flooding is also well reproduced, although with some underestimations along the coastline and overestimation in the inner part of large marshes. These limitations are explained by a lack of spatial resolution locally and the absence of several processes in the model such as infragravity waves and wave runup. The comparison between our baseline simulation and a simulation where the flooding is disabled by increasing the dike height reveals differences in maximum water levels locally reaching 1.0 m. This result is of key importance for coastal management strategies and also questions classical engineering approaches relying on one-way nesting. Article in Journal/Newspaper Northeast Atlantic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Coastal Engineering 94 80 89
institution Open Polar
collection Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
op_collection_id ftccsdartic
language English
topic [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces
environment
[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology
[SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph]
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography
spellingShingle [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces
environment
[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology
[SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph]
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography
Bertin, Xavier
Li, Kai
Roland, Aron
Zhang, Yinglong J.
François Breilh, Jean
Chaumillon, Eric
A modeling-based analysis of the flooding associated with Xynthia, central Bay of Biscay
topic_facet [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces
environment
[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology
[SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph]
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography
description International audience Storm-induced coastal flooding is among the most destructive natural disasters, as seen recently in the Bay of Bengal, the Gulf of Mexico and the Philippines. This study presents a high resolution hindcast of the flooding associated with Xynthia, a mid-latitude storm that severely hit the central part of the Bay of Biscay in February 2010. A 2DH fully coupled modeling system is applied to the NorthEast Atlantic Ocean, with a resolution locally reaching a few meters along the coastline of the study area. Such a fine resolution was required to adequately represent the dikes and the barriers that usually prevent the area from flooding, but results in a N1,700,000 element unstructured grid. The comparison with the available data reveals that waves and water levels are reproduced with normalized errors of the order of 10% and 5%, respectively. The extension of the flooding is also well reproduced, although with some underestimations along the coastline and overestimation in the inner part of large marshes. These limitations are explained by a lack of spatial resolution locally and the absence of several processes in the model such as infragravity waves and wave runup. The comparison between our baseline simulation and a simulation where the flooding is disabled by increasing the dike height reveals differences in maximum water levels locally reaching 1.0 m. This result is of key importance for coastal management strategies and also questions classical engineering approaches relying on one-way nesting.
author2 LIttoral ENvironnement et Sociétés - UMRi 7266 (LIENSs)
Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS)
National Laboratory for Civil Engineering Lisboa (LNEC)
National Laboratory for Civil Engineering (LNEC)
BGS IT&E GmbH
Virginia Institute of Marine Science (VIMS)
format Article in Journal/Newspaper
author Bertin, Xavier
Li, Kai
Roland, Aron
Zhang, Yinglong J.
François Breilh, Jean
Chaumillon, Eric
author_facet Bertin, Xavier
Li, Kai
Roland, Aron
Zhang, Yinglong J.
François Breilh, Jean
Chaumillon, Eric
author_sort Bertin, Xavier
title A modeling-based analysis of the flooding associated with Xynthia, central Bay of Biscay
title_short A modeling-based analysis of the flooding associated with Xynthia, central Bay of Biscay
title_full A modeling-based analysis of the flooding associated with Xynthia, central Bay of Biscay
title_fullStr A modeling-based analysis of the flooding associated with Xynthia, central Bay of Biscay
title_full_unstemmed A modeling-based analysis of the flooding associated with Xynthia, central Bay of Biscay
title_sort modeling-based analysis of the flooding associated with xynthia, central bay of biscay
publisher HAL CCSD
publishDate 2014
url https://hal.archives-ouvertes.fr/hal-01242105
https://doi.org/10.1016/j.coastaleng.2014.08.013
genre Northeast Atlantic
genre_facet Northeast Atlantic
op_source ISSN: 0378-3839
Coastal Engineering
https://hal.archives-ouvertes.fr/hal-01242105
Coastal Engineering, Elsevier, 2014, 94, pp.80-89. ⟨10.1016/j.coastaleng.2014.08.013⟩
op_relation info:eu-repo/semantics/altIdentifier/doi/10.1016/j.coastaleng.2014.08.013
hal-01242105
https://hal.archives-ouvertes.fr/hal-01242105
doi:10.1016/j.coastaleng.2014.08.013
op_doi https://doi.org/10.1016/j.coastaleng.2014.08.013
container_title Coastal Engineering
container_volume 94
container_start_page 80
op_container_end_page 89
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