机载激光雷达技术在长江三峡工程库区滑坡灾害调查和监测中的应用研究
The application of airborne lidar technology in landslide investigation and monitoring of Three Gorges Reservoir Area
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摘要: 提要：机载激光雷达技术是一种利用激光对地表三维坐标精确信息进行采集的新型遥感技术。本文以长江三峡工程库区滑坡灾害调查和监测应用为主要研究目标，通过对试验区的机载激光雷达数据的获取和处理，得到了精度很高的机载激光雷达DEM产品，并从定性和定量两个方面进行了机载激光雷达技术滑坡调查和动态监测应用试验。研究表明机载激光雷达山体阴影图能够直观表达微地貌形态；机载激光雷达坡度和地表粗糙度图像能够提供精确的微地貌特征量；利用多期机载激光雷达数据进行滑坡动态监测，可以掌握一定时间段内滑坡体的变形趋势和特征，并精确测算变形量。Abstract: Abstract：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.
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Keywords:
- airborne lidar /
- DEM /
- landslide /
- investigating and monitoring
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