Application of UAV photogrammetry technology in emergency investigation of Aniangzhai landslide

doi:10.13474/j.cnki.11-2246.2023.0013

Abstract

Abstract: UAV photogrammetry technology has the advantages of high data acquisition efficiency, fast response speed, and abundant and various results, and is gradually applied to emergency investigations of geological disasters. After the resurrection of the Aniangzhai landslide on June 18, 2020, UAV photogrammetry technology is used to conduct emergency investigations. For starters, the feasibility of the drone image-free photogrammetry technology of UAV is verified by checkpoint, and the software selection of rapid stitching and comprehensive processing of UAV image data is studied in a summary. The basic data such as 3D real model, digital surface model (DSM), orthophoto image (DOM) and dense point cloud are generated in the investigation area. Based on the processing and analysis of basic data, the rapid mapping of slide topography and the survey of landslide characteristics are completed, and the difference calculation of multi-phase high-precision UAV photogrammetry data is performed to identify areas with large landslide deformation and quantitatively characterize the landslides deformation characteristics, which provide guidance for the selection of monitoring equipment. With a maximum cumulative deformation of up to 16 m of monitoring on the landslide body,GNSS is effective to ensure the smooth implementation of disaster prevention and control projects by connecting the monitoring data of the professional monitoring equipment deployed on-site to the geological disaster real-time monitoring and early warning system.

Key words: UAV, photogrammetry technology, Aniangzhai landslide, emergency investigation

CLC Number:

P237

CHEN Qiao, YUAN Feiyun, FU Xia, ZHANG Wenju, DONG Xiujun. Application of UAV photogrammetry technology in emergency investigation of Aniangzhai landslide[J]. Bulletin of Surveying and Mapping, 2023, 0(1): 77-83,119.

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