Landslide data mosaicking based on an airborne laser point cloud and multi-beam sonar images
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Landslide data mosaicking based on an airborne laser point cloud and multi-beam sonar images JI Hao-wei
https://orcid.org/0000-0002-4565-1769; e-mail: [email protected]
LUO Xian-qi*
https://orcid.org/0000-0002-4639-8611;
ZHOU Yong-jun
e-mail:[email protected]
https://orcid.org/0000-0002-9965-4682; e-mail: [email protected]
*Corresponding author School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China Citation: Ji HW, Luo XQ, Zhou YJ (2020) Landslide data mosaicking based on an airborne laser point cloud and multi-beam sonar images. Journal of Mountain Science 17(9). https://doi.org/10.1007/s11629-020-5896-7
© Science Press, Institute of Mountain Hazards and Environment, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract: Landslides are one of the most disastrous geological hazards in southwestern China. Once a landslide becomes unstable, it threatens the lives and safety of local residents. However, empirical studies on landslides have predominantly focused on landslides that occur on land. To this end, we aim to investigate ashore and underwater landslide data synchronously. This study proposes an optimized mosaicking method for ashore and underwater landslide data. This method fuses an airborne laser point cloud with multi-beam depth sounder images. Owing to their relatively high efficiency and large coverage area, airborne laser measurement systems are suitable for emergency investigations of landslides. Based 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 boundaries. Further meticulous extraction of the channel boundaries is then implemented using the probability mean value optimization method. In 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 than Received: 11-Nov-2019 1st Revision: 21-Apr-2020 2nd Revision: 11-Jun-2020 Accepted: 05-Jul-2020
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traditional methods. The 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. Keywords: Laser point cloud; Airborne laser measurement; Mosaicking method; Multi-beam sonar images; Shipborne; Channel boundaries
Introduction A landslide is a slip geological phenomenon that occurs at the shear failure surface between the slope rock and soil transition, and landslides are widely recognized as one of the main types of geological disasters (Vassallo et al. 2019). With the development of marine oil and gas exploration and marine enginee
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