Experimental research on early identification of landslides by D-InSAR technique

摘要

Monitoring and early warning are the main means to reduce the harm of landslide disaster effectively. Differing from the traditional method of monitoring differential interferometry synthetic aperture radar (D-InSAR) technique has the advantage of detecting and penetrating earth surface in all weather conditions and in all time, with large area and low cost, it can meet the needs of wide-area landslide moving early recognition and dynamic time-spatial monitoring. It have been verified the layover and shadow greatly influence the results of monitoring in mountain areas, in order to obtain reliable monitoring results, 5 images Radarsat-2 programming data are used, and the three-pass differential interferometric processing method is adopted for DInSAR analysis. In the data analysis process, many aspects may probably produce errors, some methods of filter processing are performed on obtaining vertical displacement value. As result, 6 landsliding areas are identified by D-InSAR analysis. It is proved that the combination of D-InSAR technology and data filtering for deformation analysis is a feasible approach for detecting landslides moving.