Adaptation et gestion des risques : usages et limites de l'analyse coût-bénéfice

Stéphane Hallegatte (1, 2) , Patrice Dumas (2, 3)

1 Météo-France
2 CIRED - centre international de recherche sur l'environnement et le développement
3 Cirad - Centre de Coopération Internationale en Recherche Agronomique pour le Développement

An simplified application of cost-benefit analysis to sea level rise and to the increased risk of storm surges is performed for the Languedoc-Roussillon region of France. This analysis allows to show the interests and limits of cost-benefit analysis. It shows that taking into account the current level of protection is important. It also highlights that cost-benefit analysis is usefull to communicate on the opportunity to rise defenses. However, uncertainty and elements difficult to quantify, such as non monetary amenities prevent the cost-benefit analysis to be the sole basis for decision.

Domaines: Environnement et Société

Stéphane Hallegatte, Patrice Dumas. Adaptation et gestion des risques : usages et limites de l'analyse coût-bénéfice. Gestion des risques naturels, leçons de la tempête Xynthia, Quae, pp.197-207, 2012. ⟨hal-00836774⟩