【摘要】 我国茂密植被山区地质灾害具有高位、高隐蔽性的特点,传统地质灾害排查手段在有效解决隐患的早期识别方面存在一定困难。机载雷达技术不仅可获取地面反射的三维激光点云,同时能够提供高分辨率、高精度的地形地貌二维影像。机载雷达的多次回波技术可"穿透"地面植被,通过滤波算法能够有效去除地表植被的影响,获取真地面高程数据信息,从而可获取相关区域精细准确的地面特征和坡体变形迹象及灾害体形态特征。本文将机载Li DAR技术在广东佛山西樵山公园进行应用实践,研究成果表明,机载Li DAR技术可提高茂密植被山区地质灾害隐患的早期识别能力,对进一步提高综合防灾减灾能力作用显著。更多还原

【Abstract】 The geological hazards in densely vegetated mountainous areas of China are characterized by high position and high concealment. But the traditional methods of geological hazard investigation can not effectively solve the problem of early identification of hidden hazards. The airborne radar can obtain 3D laser point cloud with ground reflection intensity,which can not only provide high resolution and high precision two-dimensional image of topography,but also can "penetrate"the ground vegetation with multi-echo technology. The filtering algorithm can effectively remove the influence of the vegetation on the ground surface and obtain the true ground elevation data,so that the features of various terrain features and the signs of slope deformation in the relevant areas can be seen clearly. And the fine and accurate morphological features of the disaster body can be obtained. In this paper,the application of airborne LiDAR technology in Qiaoshan Park,Foshan City,Guangdong Province,has been studied. The results show that airborne LiDAR technology can improve the early identification ability of geological hazards in densely vegetated mountainous areas,which is helpful to improve the ability of comprehensive disaster prevention and reduction.更多还原