摘要
Employing the well-known D-InSAR technique,we investigated landslide monitoring in the Three Gorges region using TerraSAR-X data.The experiment demonstrates that using both the amplitude and differential phase allows us to identify the precise location,deformation and time range of occurrence of certain landslides.To overcome the atmospheric effect on D-InSAR results,a time-series analysis was also carried out.The observed nonlinear relationship between the deformation and water level suggests that reservoir water level fluctuation is one of the major causes of landslides,which is significant in terms of issuing landslide warnings.In addition,the comparison of TerraSAR-X and C-band ASAR data results indicates that TerraSAR-X data provide far more reasonable deformation measurements because of their high temporal and spatial resolutions.
Employing the well-known D-InSAR technique, we investigated landslide monitoring in the Three Gorges region using Ter- raSAR-X data. The experiment demonstrates that using both the amplitude and differential phase allows us to identify the pre- cise location, deformation and time range of occurrence of certain landslides. To overcome the atmospheric effect on D-InSAR results, a time-series analysis was also carried out. The observed nonlinear relationship between the deformation and water level suggests that reservoir water level fluctuation is one of the major causes of landslides, which is significant in terms of is- suing landslide warnings. In addition, the comparison of TerraSAR-X and C-band ASAR data results indicates that Ter- raSAR-X data provide far more reasonable deformation measurements because of their high temporal and spatial resolutions.
基金
supported by National Basic Research Program of China (Grant No.2007CB714405)
National Natural Science Foundation of China (Grant No.41021061)
Major Research Program of the Three Gorges Region Geologic Disaster Protection (Grant No.SXKY3-6-4)
