Landslides risk mapping using the Vigirisks web-tool: application in Normandie (France)

Gilles Grandjean (1) , Yannick Thiery (1) , Audrey Hohmann (1) , Caterina Negulescu (1) , Farid F Smaï (1) , O Maquaire (2)

1 BRGM - Bureau de Recherches Géologiques et Minières (BRGM)
2 UNICAEN UFR SEGGAT - Université de Caen Normandie - UFR de Sciences Économiques, Gestion, Géographie et Aménagement des Territoires

Landslides threaten many parts of the world and cause many deaths and significant damage every year, and this should increase in the future due to climate change. To cope with this situation and prevent landslides impacts, a large variety of susceptibility and hazard mapping tools have been developed, either to assess current potential failure zones or to predict those that will appear in the near future. In the following, we present an application of the Vigirisks multirisks web-platform. This web-tools, developed by BRGM, propose computations allowing multi-risks mapping in a realistic manner, e.g., including cascading effects, vulnerability assessment and damages evaluation. The study site selected here is located in Diepe (Normandie, France); this is a typical case of complex flooding/landsliding processes. The Vigirisk web-tool was tested to evaluate risks when these two processes occur in the same time. We present here a simple "concomitant risks" workflow, implemented by using a weithing method.

Domaines: Milieux et Changements globaux

Gilles Grandjean, Yannick Thiery, Audrey Hohmann, Caterina Negulescu, Farid F Smaï, et al.. Landslides risk mapping using the Vigirisks web-tool: application in Normandie (France). Journées Aléas Gravitaires, May 2022, Montpellier, France. ⟨hal-03636823⟩