Ground-penetrating radar observations for estimating the vertical displacement of rotational landslides
- 1PRODIG, CNRS – UMR8586, Université Paris Diderot, Sorbonne-Paris-Cité, Paris, France
- 2Laboratoire LETG-CAEN GEOPHEN, Géographie Physique et Environnement, CNRS – UMR 6454, Université de Caen-Basse-Normandie, Esplanade de la Paix, 14032 Caen CEDEX, France
- 3Institut de Physique du Globe de Strasbourg, CNRS – UMR 7516, Ecole et Observatoire des Sciences de la Terre, EOST/Université de Strasbourg, 5 rue Descartes, 67084 Strasbourg, France
- 4Laboratoire de Géographie Physique, CNRS – UMR 8591, Meudon, France
- 5University of Canterbury, Natural Hazards Research Centre, Waterways: Centre for Freshwater Management, College of Sciences, Department of Geography, Private Bag 4800, 8140 Christchurch, New Zealand
Abstract. The objective of this paper is to demonstrate the applicability of ground-penetrating radar (GPR) for monitoring the displacement of slow-moving landslides. GPR data are used to estimate the vertical movement of rotational slides in combination with other surveying techniques. The study area is located along the Normandy coast (northeast France) where several rotational landslides are continuously affected by a seasonal kinematic regime (low displacement rates of 0.01 to 0.10 m yr−1) and periodically by major acceleration events (high displacement rates of 1.0 to 7.0 m per event).