Abstract
The objective of this work is to document the deformation pattern of the deep-seated La Clapière landslide for the period 2007–2010 from the combination of L-band synthetic aperture radar (SAR) interferograms, ground-based total station measurements and identification of the slope geomorphological structures. The interferograms are calculated for pairs of ALOS/PALSAR images at a time interval of 46 days. The displacement field derived from the interferograms reveals a non-uniform displacement gradient from the top (subsidence) to the bottom (accumulation). Vertical velocities are calculated from the unwrapped phase values and are in good agreement with ground-based measurements. The results demonstrate the potential of L-band ALOS/PALSAR imagery for the monitoring of active landslides characterized by complex kinematic patterns and by important changes in the soil surface backscattering in time.
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Acknowledgments
This work was supported by the EU 7th framework Marie Curie ITN project ‘CHANGES: Changing Hydro-meteorological Risks as Analyzed by a New Generation of European Scientists’ under Grant Agreement No. 263953. ALOS/PALSAR images are provided by the Japan Aerospace Exploration Agency (JAXA) and the European Space Agency (ESA) under the contract C1P.8859. The total station measurements were provided by Centre d’Etudes et d’Expertise sur les Risques, l’Environnement, la Mobilité et l’Aménagement (CEREMA) in agreement with the Direction Départementale des Territoires et de la Mer (DDTM-06). We thank E. Palis (University of Nice) for fruitful discussion on the geomorphology of the landslide.
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Schlögel, R., Malet, JP., Doubre, C. et al. Structural control on the kinematics of the deep-seated La Clapière landslide revealed by L-band InSAR observations. Landslides 13, 1005–1018 (2016). https://doi.org/10.1007/s10346-015-0623-0
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DOI: https://doi.org/10.1007/s10346-015-0623-0