GPR RESPONSES ON DIFFERENT PHYSICAL AND GEOMETRICAL PARAMETERS OF LANDSLIDE FACTORS

Ground penetrating radar(GPR)responses are examined with a number of synthetic models resembling main landslide factors with different physical and geometrical parameters. The factors include slip band thick, slip band with different filling mediums, type of rock and soil, different cracks. The GPR responses are simulated using an improved finite difference time domain forward modeling algorithm. It is shown that there are mathematical relationships between the characteristics of GPR responses and the respective geometrical and physical parameters of landslide. Such mathematical relationships are applied to real field data for deriving estimations of hidden subsurface landslide parameters which can be used to assess the landslide accurately. In order to show the applicability of this study, the GPR field data of Jiangjuntan landslide in Three Gorges Reservoir area is chosen to infer using the mathematical relationships. The result is shown that factors including the depth and distribution of the landslide, the development of the cracks, can be successfully identified.