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| Titel |
Assessment of static flood modeling techniques: application to contrasting marshes flooded during Xynthia (western France) |
| VerfasserIn |
J. F. Breilh, E. Chaumillon, X. Bertin, M. Gravelle |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 13, no. 6 ; Nr. 13, no. 6 (2013-06-20), S.1595-1612 |
| Datensatznummer |
250018503
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| Publikation (Nr.) |
 copernicus.org/nhess-13-1595-2013.pdf |
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| Zusammenfassung |
| This study aims to assess the performance of raster-based flood modeling
methods on a wide diversity of coastal marshes. These methods are applied to
the flooding associated with the storm Xynthia, which severely hit the
western coast of France in February 2010. Static and semi-dynamic methods
are assessed using a combination of LiDAR data, post-storm delineation of
flooded areas and sea levels originating from both tide gauge measurements
and storm surge modeling. Static methods are applied to 27 marshes showing a
wide geomorphological diversity. It appears that these methods are suitable
for marshes with a small distance between the coastline and the landward
boundary of the marsh, which causes these marshes to flood rapidly. On
the contrary, these methods overpredict flooded areas for large marshes
where the distance between the coastline and the landward boundary of the
marsh is large, because the flooding cannot be considered as instantaneous.
In this case, semi-dynamic methods based on surge overflowing volume
calculations can improve the flooding prediction significantly. This study
suggests that static and semi-dynamic flood modeling methods can be
attractive and quickly deployed to rapidly produce predictive flood maps of
vulnerable areas under certain conditions, particularly for small distances between the
coastline and the landward boundary of the low-lying coastal area. |
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