Velocity and acceleration analysis of land deformation: Case study on Kelok Sembilan bridge

Abstract

Characteristic analysis of land deformation in some area is very helpful for mapping and preventing the impact of landslide. Here, Persistent Scatterer Interferometric (PSI) Synthetic Aperture Radar (SAR) technique has been applied on 13 scenes of ascending track acquired by Advanced Land Observation Satellite Phased Array L-band Synthetic Aperture Radar (ALOS PALSAR) from July 2007 until November 2010 for characteristic analysis of the landslide. The technique is employed to identify and measure land deformation on the earth surface. The PSI technique has good accuracy in overcoming temporal and geometric decorrelation compared to conventional interferometric SAR technique. The result for analyzing landslide deformed area on Kelok Sembilan bridge has been identified. In addition, time series of landslide deformation history were used for calculating the past velocity and acceleration of landslide as well as for estimating for the future.