Detecting and monitoring landslide phenomena with TerraSAR-X persistent scatterers data: the Gimigliano case study in Calabria region (Italy)

This work illustrates the potential of Persistent Scatterer Interferometry (PSI) using X-band SAR (Synthetic Aperture Radar) data for a detailed detection and characterization of landslide ground displacements at local scale. We present the case study of Gimigliano, located in Calabria Region (Italy) and extensively affected by past and present landslide phenomena. 27 TerraSAR-X SAR images were collected from December 2010 to October 2011, over the Gimigliano area to perform the PSI analysis. In order to assess any spatial and temporal evolution patterns of deformation, the present X-band PS data were compared with historical motion rates derived from ERS1/2 and ENVISAT satellites, and with geo-morphological evidences resulting from auxiliary data like pre-existing landslide inventories and orthophotos referred to different dates, finally validated with recent field checks. The outcomes of this work can be taken into account for further hazard-reduction analysis and to support risk mitigation design within the investigated area.