无人机倾斜摄影测量在双江口水电站地质隐患分析中的应用

Application of UAV Oblique Photogrammetry in Analysis on Geological Hazard in Shuangjiangkou Hydropower Station

笔者以四川大渡河双江口水电站施工区与库区地形地貌数字航摄测量服务项目为背景,以航空影像数据为基础,利用无人机航空摄影技术快速灵活获取高分辨率影像的特点,获取DEM、DOM及三维实景模型成果,并计算出施工区坡度图、坡向图,同时基于三维地质灾害解译方法提取出地质隐患区域。经实地勘测,地质隐患分析提取成果与实际情况相符,验证了该方法的有效性。

Taking the digital aerial surveying service of the construction area and the reservoir area of Shuangjiangkou Hydropower Station in Dadu River of Sichuan Province as the background and the aerial image data as basis,the author obtains DEM,DOM and 3D real-world model results applying the UAV aerial photography technology which can quickly and flexibly acquire high-resolution images.Based on the real-time results,the author works out the slope gradient and orientation map of the construction area,and extracts the geological hazard area based on the 3D geological disaster interpretation method.Field survey shows that the results of geological hazard analysis and extraction are consistent with the actual situation,and the effectiveness of the method is verified.