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Fig. 5

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Étude de l’influence d’un merlon sur l’exposition du village du Prêcheur aux coulées de débris. L’échelle de couleur donne les zones impactées en fonction du volume des coulées de débris. (a) Cas de référence, avec la topographie d’août 2018 (DEAL Martinique/Helimap). (b) Avec un merlon de 175 m de long. (c) Avec un merlon de 400 m de long. (c) Avec un merlon de 575 m de long. (e) Dimensions du merlon. Adapté de Peruzzetto (2021a).

Analysis of the influence of protection walls on the vulnerability of the Prêcheur village to debris flows. The colorscale indicates which areas are affected by debris flows, depending on their volumes. (a) Reference case, with the topography of August 2018 (DEAL Martinique/Helimap). (b) With a 175 m protection wall. (c) With a 400 m protection wall. (d) With a 575 m protection wall. (e) Dimensions of the protection wall. Adapted from Peruzzetto (2021a).

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