Which data for quantitative landslide susceptibility mapping at operational scale? Case study of the Pays d'Auge plateau hillslopes (Normandy, France) - Université de Bretagne Occidentale Accéder directement au contenu
Article Dans Une Revue Natural Hazards and Earth System Sciences Année : 2014

Which data for quantitative landslide susceptibility mapping at operational scale? Case study of the Pays d'Auge plateau hillslopes (Normandy, France)

Résumé

This paper aims at assessing the impact of the data set quality for landslide susceptibility mapping using multivariate statistical modelling methods at detailed scale. This research is conducted on the Pays d'Auge plateau (Normandy, France) with a scale objective of 1 / 10 000, in order to fit the French guidelines on risk assessment. Five sets of data of increasing quality (considering accuracy, scale fitting, and geomorphological significance) and cost of acquisition are used to map the landslide susceptibility using logistic regression. The best maps obtained with each set of data are compared on the basis of different statistical accuracy indicators (ROC curves and relative error calculation), linear cross correlation and expert opinion. The results highlight that only high-quality sets of data supplied with detailed geomorphological variables (i.e. field inventory and surficial formation maps) can predict a satisfying proportion of landslides in the study area.

Mots clés

Fichier principal
Vignette du fichier
nhess-14-569-2014.pdf (6.66 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-01108488 , version 1 (22-01-2015)

Identifiants

Citer

Mathieu Fressard, Yannick Thiery, O. Maquaire. Which data for quantitative landslide susceptibility mapping at operational scale? Case study of the Pays d'Auge plateau hillslopes (Normandy, France). Natural Hazards and Earth System Sciences, 2014, pp.569-588. ⟨10.5194/nhess-14-569-2014⟩. ⟨hal-01108488⟩
305 Consultations
334 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More