De la perception du risque d'inondation aux propositions d'adaptation en territoire de côtes basses densément peuplées : le cas de la communauté urbaine de Dunkerque

Abstract : Flooding is one of the world's main natural hazards. In view of this risk, being amplified by climate change, management has become crucial, especially in low-lying coastal areas. Risk perception, as a complex notion referring to cognitive, social, economic and environmental aspects, is a real contribution to reveal the vulnerability points of populations. This PhD thesis adresses the analysis of the population's perception of the flood risk within the "Communauté Urbaine de Dunkerque". In this territory, located on a densely populated, urbanized and historically flood-affected low-lying coastal area, a large perception survey was carried out among inhabitants and risk management stakeholders. Its aim was to measure their flood risk perception and to bring to light various factors that influence it. The survey was conducted according to a methodology at the crossroads of several disciplines (geography, sociology, psychosociology and economics). The results highlight : (1) a discordant perception of this risk and a low concern ; (2) spatial risk representations very different from official ones ; (3) the influence of risk perception on willingness to pay to prevent themselves from risk. This thesis provides input to cindynics sciences and risk geography. It suggests adjustments to reduce these inhabitant's vulnerability to flood risk.
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Nicolas Verlynde. De la perception du risque d'inondation aux propositions d'adaptation en territoire de côtes basses densément peuplées : le cas de la communauté urbaine de Dunkerque. Géographie. Université du Littoral Côte d'Opale, 2018. Français. ⟨NNT : 2018DUNK0500⟩. ⟨tel-02085107⟩

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