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| Titel |
Regional frequency analysis of extreme storm surges along the French coast |
| VerfasserIn |
L. Bardet, C.-M. Duluc, V. Rebour, J. L'Her |
| 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 ; 11, no. 6 ; Nr. 11, no. 6 (2011-06-14), S.1627-1639 |
| Datensatznummer |
250009484
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| Publikation (Nr.) |
 copernicus.org/nhess-11-1627-2011.pdf |
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| Zusammenfassung |
| A good knowledge of extreme storm surges is necessary to ensure protection
against flood. In this paper we introduce a methodology to determine time
series of skew surges in France as well as a statistical approach for
estimating extreme storm surges. With the aim to cope with the outlier issue
in surge series, a regional frequency analysis has been carried out for the
surges along the Atlantic coast and the Channel coast. This methodology is
not the current approach used to estimate extreme surges in France. First
results showed that the extreme events identified as outliers in at-site
analyses do not appear to be outliers any more in the regional empirical
distribution. Indeed the regional distribution presents a curve to the top
with these extreme events that a mixed exponential distribution seems to
recreate. Thus, the regional approach appears to be more reliable for some
sites than at-site analyses. A fast comparison at a given site showed surge
estimates with the regional approach and a mixed exponential distribution
are higher than surge estimates with an at-site fitting. In the case of
Brest, the 1000-yr return surge is 167 cm in height with the regional
approach instead of 126 cm with an at-site analysis. |
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