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Gestion institutionnelle et réponses des populations face aux crises volcaniques : études de cas à La Réunion et en Grande Comore

Abstract : Volcanic crisis management is a marginal study subject, whatever the research field. The complex nature of volcanic phenomena (multiple hazards, uncertainty of forecast), the lack of conceptual and methodological frameworks to study such crises, the reduced opportunities of experiencing volcanic crises, and the fact that Earth scientists focus on the hazard are all the reasons behind this lack of commitment. The objective of this thesis is to make up for some of these shortcomings by building up information on ways to manage crises. It provides post-crisis analysis about the management of the eruptive crisis of May 2006 at Karthala volcano (Grande Comore), and of April 2007 at the Piton de la Fournaise (La Reunion island). It also contains another analysis about the management of lahars subsequent to the explosive eruptions in 2005 in Grande Comore. These study case on personal experiences of analysed crises, then on investigations undertaken with local authorities, scientist, media and population. They highlight, amongst other things, a blatant lack of resources, information and training of all agents on both islands. The cause for such dysfunctioning factors are looked into. The analysis reveals the importance of human, cultural, political, socioeconomic, and territorial components in responding to crises. Finally, this thesis suggests tools and approaches to improve crisis management on both islands.
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Julie Morin. Gestion institutionnelle et réponses des populations face aux crises volcaniques : études de cas à La Réunion et en Grande Comore. Volcanologie. Université de la Réunion, 2012. Français. ⟨NNT : 2012LARE0035⟩. ⟨tel-01199868⟩

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