Micro-UAV based remote sensing method for monitoring landslides in Three Gorges Reservoir, China

摘要

To overcome the defects of landslide monitoring methods on ground or airborne- or satellite-based remote sensing, the micro unmanned aerial vehicle (micro-UAV) based remote sensing method is used to monitoring Qinglingou slope, a steep slope in Three Gorges Reservoir, China. A tailormade micro-UAV with multi-rotor, high-accuracy position orientation system and digital camera is assembled, and it can fly and photograph automatically according to flight plan. After acquiring all photographs, the digital orthophoto and digital terrain model (DTM) with high spatial resolution and high accuracy can be produced by photogrammetric processing. Accordingly, the exact spatial characteristics, especially the new surface deformation can be easily identified, even if these deformations occurred in inaccessible area and covered by dense vegetation. Results show that the method has incomparable superiority, because it can directly reflect the whole surface of slope or landslide from aeroview.