Ground-Based SAR Interferometry for Updating DTMs in Landslide Areas and Evaluating Morphological Changes

In an environment where the local topography can change by tens of meters in elevation due to phenomena such as a large landslide, up-to-date accurate topographic mapping is invaluable for many diverse applications. These include the identification of down-slope areas, the measurement of terrain volume, and the modelling of landslides. Recently, the Linear Synthetic Aperture (LiSA) system, a Ground-Based Synthetic Aperture Radar (GB-SAR) developed at the Joint Research Centre of the European Commission has been successfully employed to monitor landslides having different properties. In these cases a zero-baseline interferometric configuration has been used to measure terrain displacements in areas having a spatial extension of a few squared kilometres and located in mountainous regions. This work concerns the application of the LiSA interferometer using a stereoscopic interferometric configuration to map the local topography. The performances of the stereoscopic LiSA interferometer are presented and its application to the study of changes in terrain morphology of a landslide area described. The stereoscopic configuration is used to identify the area interested by morphological changes. The comparison with data acquired with a zero-baseline interferometric configuration allows to confirm that the area identified by means of the stereoscopic configuration is actually moving. This approach could be useful to monitor a landslide on a short and a long time scale.

ANTONELLO Giuseppe;  FORTUNY GUASCH Joaquim;  LEVA Davide;  NICO Giovanni;  TARCHI Dario; 

2008-09-16

European Geosciences Union

JRC45218

1607-7962,   

https://publications.jrc.ec.europa.eu/repository/handle/JRC45218,