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Identification of Hydro-Meteorological Triggers for Villerville Coastal Landslide

  • Thom BogaardEmail author
  • Laxmi Devi Maharjan
  • Olivier Maquaire
  • Candide Lissak
  • Jean-Philippe Malet
Chapter

Abstract

The Villerville–Cricqueboeuf landslide (Normandy, France) is an example of a very well monitored coastal landslide. The long time series goes back to the 1980s initiated after the January 1982 major re-activation of the landslide complex. The combination of translational movement of large blocks of chalk and sandstone and the rotational movement at the cliff’s toe results in a very complex hydrological system. Earlier research showed a qualitative connection of displacement or re-activation with meteorological forcing and inland hydrological circumstances.

This study aims to analyse the hydrological processes within the larger landslide area and quantifies the hydro-meteorological triggering thresholds. Long-term continuous single point time series and shorter more spatially distributed information were used for the analysis. A conceptual water balance approach on monthly time scale was used to model the regional groundwater system showing a clear non-linear response at higher groundwater levels. An empirical rainfall threshold for landslide re-activation was proposed using rainfall and inland groundwater level as proxy for antecedent conditions.

Keywords

Hydrology Threshold Landslide 

Notes

Acknowledgments

This research was funded through the ANR Risk-Nat project ‘SISCA: Système intégré de Surveillance de Crises de glissements de terrain argileux’ (2009–2011).

References

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Thom Bogaard
    • 1
    • 2
    Email author
  • Laxmi Devi Maharjan
    • 2
  • Olivier Maquaire
    • 3
  • Candide Lissak
    • 3
  • Jean-Philippe Malet
    • 4
  1. 1.Water resources section, Delft University of TechnologyDelftThe Netherlands
  2. 2.UNESCO-IHE Institute for Water EducationDelftNetherlands
  3. 3.UMR 6554 CNRS, LEGT- Geophen, University of Caen Basse-NormandieCaenFrance
  4. 4.Institut de Physique du Globe de Strasbourg, CNRS UMR 7516Université de StrasbourgStrasbourgFrance

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