La régionalisation des précipitations : une revue bibliographique des développements récents

St‐Hilaire, André; Ouarda, Taha B. M. J.; Lachance, Marius; Bobée, Bernard; Barbet, Marc; Bruneau, Pierre

doi:10.7202/705497ar

Cited by 14 publications

(14 citation statements)

References 54 publications

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“…The regional approach used here is inspired by the theory of Hosking and Wallis (Hosking and Wallis, 1997) and the studies carried out essentially for river flows (Ouarda et al, 1999;Kjeldsen et al, 2002;Ouarda et al, 2008;Saf, 2009) or for rainfall (St-Hilaire et al, 2003;Abolverdi and Khalili, 2010) with the index flood model.…”

Section: Principle and Interest Of The Methodsmentioning

confidence: 99%

Regional frequency analysis of extreme storm surges along the French coast

Bardet

Duluc

Rebour

et al. 2011

Nat. Hazards Earth Syst. Sci.

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Abstract.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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Section: Principle and Interest Of The Methodsmentioning

confidence: 99%

Regional frequency analysis of extreme storm surges along the French coast

Bardet

Duluc

Rebour

et al. 2011

Nat. Hazards Earth Syst. Sci.

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“…Leur champ d'application s'est ensuite étendu aux précipitations. Au Canada, Alila (1999Alila ( , 2000 met l'accent sur l'importance de l'incorporation de l'information régionale dans l'analyse de fréquence des précipitations à un site alors que, St-Hilaire et al (2003) présentent et comparent les principales méthodes d'analyse de fréquence régionale couramment utilisées pour quantifier les événements pluviaux extrêmes. En France, les travaux de Kieffer (1998) et Djerboua (2001) ont porté sur l'estimation régionale des précipitations extrêmes en Alpes françaises et franco-italiennes.…”

Section: Introductionunclassified

Analyse fréquentielle régionale des précipitations journalières maximales annuelles au Québec, Canada / Regional frequency analysis of annual maximum daily precipitation in Quebec, Canada

Onibon

Ouarda

Barbet

et al. 2004

Hydrological Sciences Journal

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Résumé Une méthodologie d'analyse régionale complète des précipitations journalières a été mise en oeuvre pour la moitié sud du Québec (Canada). La première étape d'une procédure d'estimation régionale consiste à définir les régions homogènes de la zone d'étude et à valider cette homogénéité pour chaque région ainsi définie. Les rapports de L-moments ont été utilisés pour définir les régions homogènes. La variabilité inter-site a ensuite été évaluée à l'aide de simulations pour tester l'homogénéité statistique. La deuxième étape consiste à identifier la distribution régionale et à estimer ses paramètres. La loi GEV ("General Extreme Value"), qui a été utilisée dans de plusieurs études antécédentes de régionalisation des précipitations extrêmes, a été identifiée comme distribution régionale adéquate. Les paramètres de la GEV ont ensuite été calculés à l'aide de la définition des L-CV et L-C S régionaux, de même que les précipitations maximum annuelles. La troisième étape consiste à estimer les quantiles de précipitations pour différentes périodes de retour. Cette dernière étape permet l'estimation de quantiles de précipitations à des sites pour lesquels l'on ne dispose d'aucune mesure. L'utilisation subséquente d'une procédure de ré-échantillonnage de type "jack-knife" à partir des stations du territoire québécois a permis de vérifier la robustesse et l'efficacité de la méthodologie d'analyse régionale. La racine carrée de l'erreur quadratique moyenne est inférieure à 10% pour une période de retour de 20 ans et à 20% pour une période de retour de 100 ans.Mots clefs analyse régionale; précipitations; précipitations extrêmes; L-moments; analyse fréquentielle; Québec, Canada Regional frequency analysis of annual maximum daily precipitation in Quebec, CanadaAbstract A complete regional analysis of daily precipitations is carried out in the southern half of the province of Quebec, Canada. The first step of the regional estimation procedure consists of delineating the homogeneous regions within the area of study and testing for homogeneity within each region. The delineation of homogeneous regions is based on using L-moment ratios. A simulation-based testing of statistical homogeneity allows one to verify the inter-site variability. The second step of the procedure deals with the identification of the regional distribution and the estimation of its parameters. The General Extreme Value (GEV) distribution was identified as an appropriate parent distribution. This distribution has already been recommended by several previous research studies for regional frequency analysis of precipitation extremes. The parameters of the GEV distribution are estimated based on the computation of the regional L-CV, L-C S and the mean of annual maximal daily precipitations. The third step consists of the estimation of precipitation quantiles corresponding to various return periods. The final procedure allows for the estimation of these quantiles at sites where no precipitation information is available. The use of a jack-knife resampling pr...

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“…Une revue bibliographique des techniques de régionalisation des précipitations a été présentée par ST-HILAIRE et al (2003). Il faut cependant noter que les précipitations représentent des variables météorologiques qui ne sont pas directement transformées par les caractéristiques physiographiques des bassins.…”

Section: Diversité Des Variables Hydrologiques Considérées En Analyseunclassified

Synthèse des développements récents en analyse régionale des extrêmes hydrologiques

Ouarda

St‐Hilaire

Bobée

2008

rseau

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SYNTHÈSE DES DÉVELOPPEMENTS RÉCENTS EN ANALYSE RÉGIONALE DES EXTRÊMES HYDROLOGIQUES ABSTRACTAdequate estimation of extreme hydrological variables is essential for the rational design and operation of a variety of hydraulic structures, due to the significant risk that is associated with these activities. Local frequency analysis is commonly used for the estimation of extreme hydrological events at sites where an adequate amount of data is available. However, data are usually only collected at a relatively limited number of sites. In practice, it frequently happens that little or no streamflow data is available at a site of interest (where a dam is to be constructed for example). In such cases, hydrologists can utilize a regional flood frequency procedure, relying on data available from other basins with a similar hydrologic regime.Various methods have been developed over the last few years for the regional analysis of extreme hydrological events. These regionalization approaches aim to estimate different characteristics of the extreme hydrological phenomena of interest, make different assumptions and hypotheses concerning these hydrological phenomena, rely on various types of data, and often fall under completely different theories. The present paper aims to review and classify recent developments in regional frequency analysis of extreme hydrological variables. Analyse régionale des extrêmes hydrologiques 220The specific objectives of the paper are to: i) review the main recent developments in regional hydrologic modeling that have been proposed during the last few years; ii) classify these developments into different groups according to the theoretical background of the method, its specific objectives, and the characteristics of hydrological extreme phenomena it is intended to deal with; iii) propose a comprehensive discussion of these methods, and point out the hypotheses, limitations, data requirements, and potential of each one; iv) identify the new challenges facing engineers in terms of regional frequency analysis of hydrological extremes; and v) propose potential promising directions for future research work which aim to meet these new challenges.Recent developments reviewed in the present paper include improvements in classical approaches for regional delineation and for information transfer, methods combining the delineation and estimation steps, seasonality-based methods, multivariate models for regional frequency analysis, the QdF approach, non stationary models, and approaches for the combination of local and regional data. The paper provides also a discussion of the various hydrological variables treated with regional estimation methodologies, comparative studies of these methodologies, and practical tools that were developed for regional frequency analysis. It is hoped that this document will contribute towards closing the gap between theory and practice, by narrowing the wide body of literature that is available, and by providing comprehensive propositions for regional frequency analysis approache...

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La régionalisation des précipitations : une revue bibliographique des développements récents

Cited by 14 publications

References 54 publications

Regional frequency analysis of extreme storm surges along the French coast

Regional frequency analysis of extreme storm surges along the French coast

Analyse fréquentielle régionale des précipitations journalières maximales annuelles au Québec, Canada / Regional frequency analysis of annual maximum daily precipitation in Quebec, Canada

Synthèse des développements récents en analyse régionale des extrêmes hydrologiques

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