What would a flood cost to your home? Hazard-asset spatial overlays and induced uncertainty in natural risk assessments

Nathalie Saint-Geours (1) , Thibaud Langer (2) , Jean-Stéphane Bailly (3, 1) , Frédéric Grelot (2)

1 UMR TETIS - Territoires, Environnement, Télédétection et Information Spatiale
2 UMR G-EAU - Gestion de l'Eau, Acteurs, Usages
3 UMR LISAH - Laboratoire d'étude des Interactions Sol - Agrosystème - Hydrosystème

We investigate how hazard spatial datasets and land use spatial datasets can be overlaid in natural risk assessments. Based on a case-study of a flood damage assessment on the Orb River, France, we show that the variability of spatial overlay techniques considered as a spatial model uncertainty may result in significant uncertainty in natural risk assessments.

Mots clés: GIS; Uncertainty; Spatial overlay; Spatial support; Natural hazard

Domaines: Sciences de la Terre

Nathalie Saint-Geours, Thibaud Langer, Jean-Stéphane Bailly, Frédéric Grelot. What would a flood cost to your home? Hazard-asset spatial overlays and induced uncertainty in natural risk assessments. Spatial Accuracy 2014, ISARA, Jul 2014, East Lansing, Michigan, United States. ⟨hal-01523294⟩