Seasonal and long term analysis of precipitation-displacement relationships on a deep seated unstable slope (Séchilienne, French Alps) - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2013

Seasonal and long term analysis of precipitation-displacement relationships on a deep seated unstable slope (Séchilienne, French Alps)

Résumé

Time series analysis and cross-wavelet analysis are used to characterize the relationship between water input and displacement in the most active zone of the Séchilienne unstable slope. Time series analysis shows a displacement long term trend and seasonal intra-annual variations, respectively independent and synchronous to precipitations. Wavelet analysis has allowed identifying and characterizing the precipitation-detrended displacement relationship which shows that the Séchilienne destabilisation is rather linked to effective rainfall than to raw precipitation (rainfall + snowfall), involving then groundwater process. Seasonal analysis of this relationship was performed, showing that displacement rate follows the behaviour of the hydrological cycle. Finally, trend was analysed and a weakening model approach was developed with an attempt to forecast the next modifications in unstable slope destabilisation behaviour.
Fichier principal
Vignette du fichier
HAL.pdf (60.38 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-01062428 , version 1 (09-09-2014)
hal-01062428 , version 2 (09-02-2015)

Identifiants

  • HAL Id : hal-01062428 , version 2

Citer

Aurélien Vallet, Jean-Baptiste Charlier, Marie-Aurélie Chanut, Catherine Bertrand, Laurent Dubois, et al.. Seasonal and long term analysis of precipitation-displacement relationships on a deep seated unstable slope (Séchilienne, French Alps). JAG - 3èmes journées Aléas Gravitaires, Sep 2013, Grenoble, France. pp.1-6. ⟨hal-01062428v2⟩
341 Consultations
208 Téléchargements

Partager

Gmail Facebook X LinkedIn More