Statistical and deterministic analysis of landslide hazard. application to a forested catchment of the South French Alps.
Résumé
The objective of this study is to apply both a statistical model and a deterministic dynamic model on the same dataset of environmental factors to produce hazard maps. Several methods have been developed from simple landslide inventories to more complex probabilistic or deterministic approaches. Statistical analyses are generally used at coarse scales (1:50,000 to 1:10,000), while deterministic analyses of slope stability are used at detailed scales (1:10,000 to 1:2,000).The study site is the Bois Noir forested catchment located in the Barcelonnette Basin (South French Alps). This catchment is affected by shallow rotational and translational slides occurring at the surficial deposit-bedrock interface. Application of both models has allowed to identify the main predisposing and triggering factors of the landslides. This information can be used to assess and map landslide hazard.