Landslide monitoring in Three Gorges area by joint use of phase based and amplitude based methods

Abstract

Landslides are serious geohazards in Three Gorges area, China especially after the impoundment of Three Gorges Reservoir. It is very urgent to monitoring the landslides for early warning or disaster prevention purpose. In this paper, phase based methods such as traditional differential InSAR and small baseline subset method were used to investigate slow moving landslides. Point-like targets offset tracking (PTOT) was used to investigate fast moving landslides. Furthermore, in order to describe the displacement on landslide, two TerraSAR-X datasets obtained from different descending orbits were combined to obtain the three dimensional displacements on Shuping landslides with the PTOT measurements in the azimuth and range direction.