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The influence of climate change on flood risks in France-first estimates and uncertainty analysis

Dumas P., Hallegatte S., Quintana-Segui P., Martin E.. 2013. Natural Hazards and Earth Systems Sciences, 13 : p. 809-821.

This paper proposes a methodology to project the possible evolution of river flood damages due to climate change, and applies it to mainland France. Its main contributions are (i) to demonstrate a methodology to investigate the full causal chain from global climate change to local economic flood losses; (ii) to show that future flood losses may change in a very significant manner over France; (iii) to show that a very large uncertainty arises from the climate downscaling technique, since two techniques with comparable skills at reproducing reference river flows give very different estimates of future flows, and thus of future local losses. The main conclusion is thus that estimating future flood losses is still out of reach, especially at local scale, but that future national-scale losses may change significantly over this century, requiring policy changes in terms of risk management and land-use planning. (Résumé d'auteur)

Mots-clés : atténuation des effets du changement climatique; adaptation aux changements climatiques; terre inondée; hydrologie; méthodologie; modèle mathématique; modèle de simulation; analyse du risque; Évaluation du risque; niveau de la mer; inondation; changement climatique; france

Thématique : Météorologie et climatologie; Ressources en eau et leur gestion; Méthodes mathématiques et statistiques; Géographie

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