The application of airborne lidar technology in landslide investigation and monitoring of Three Gorges Reservoir Area

The airborne lidar is a new kind of remote sensing technology for collecting accurate three-dimensional coordinates on the surface by laser.In order to investigate and monitor the landslide of Three Gorges Reservoir Area,the authors obtained the high-precision DEM through the acquisition and processing of the airborne lidar data.On such a basis,the authors made the airborne lidar landslide investigation and dynamic monitoring test qualitatively and quantitatively.The resutls indicate that the lidar hill shade map can express micro-topography,and the lidar slope and surface roughness maps can provide precise micro-geomorphic feature parameters.In addition,deformation trends and characteristics of the landslide within a certain period can be detected and accurate deformation can be measured by multi-phase airborne lidar data.