A modeling-based analysis of the flooding associated with Xynthia, central Bay of Biscay
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 seve...
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Online Access: | https://hal.science/hal-01242105 https://doi.org/10.1016/j.coastaleng.2014.08.013 |
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ftinsu: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 - UMR 7266 (LIENSs) Institut national des sciences de l'Univers (INSU - CNRS)-La Rochelle Université (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.science/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.science/hal-01242105 doi:10.1016/j.coastaleng.2014.08.013 ISSN: 0378-3839 Coastal Engineering https://hal.science/hal-01242105 Coastal Engineering, 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 ftinsu https://doi.org/10.1016/j.coastaleng.2014.08.013 2023-02-08T18:29:52Z 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 Institut national des sciences de l'Univers: HAL-INSU Coastal Engineering 94 80 89 |
institution |
Open Polar |
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Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
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 - UMR 7266 (LIENSs) Institut national des sciences de l'Univers (INSU - CNRS)-La Rochelle Université (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.science/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.science/hal-01242105 Coastal Engineering, 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.science/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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1766143313273946112 |