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Landslide data mosaicking based on an airborne laser point cloud and multi-beam sonar images

Journal of Mountain Science 2020年第9期17卷 2068-2080页

作者： JI Hao-wei LUO Xian-qi ZHOU Yong-jun School of Naval Architecture Ocean and Civil EngineeringShanghai Jiao Tong UniversityShanghai 200240China

Landslides are one of the most disastrous geological hazards in southwestern *** a landslide becomes unstable,it threatens the lives and safety of local ***,empirical studies on landslides have predominantly focused on landslides that occur on *** this end,we aim to investigate ashore and underwater landslide data *** study proposes an optimized mosaicking method for ashore and underwater landslide *** method fuses an airborne laser point cloud with multi-beam depth sounder *** to their relatively high efficiency and large coverage area,airborne laser measurement systems are suitable for emergency investigations of *** on the airborne laser point cloud,the traversal of the point with the lowest elevation value in the point set can be used to perform rapid extraction of the crude channel *** meticulous extraction of the channel boundaries is then implemented using the probability mean value optimization *** addition,synthesis of the integrated ashore and underwater landslide data angle is realized using the spatial guide line between the channel boundaries and the underwater multibeam sonar images.A landslide located on the right bank of the middle reaches of the Yalong River is selected as a case study to demonstrate that the proposed method has higher precision thantraditional *** experimental results show that the mosaicking method in this study can meet the basic needs of landslide modeling and provide a basis for qualitative and quantitative analysis and stability prediction of landslides.

关键词： Laser point cloud Airborne laser measurement Mosaicking method multi-beam sonar images Shipborne Channel boundaries

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