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[1]Gao Yayu,Huang Xiao,Song Yu,et al.Safety Monitoring Method of Check Dams in Semi-arid Area of the Loess Plateau[J].Research of Soil and Water Conservation,2024,31(04):59-66,85.[doi:10.13869/j.cnki.rswc.2024.04.013]

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Safety Monitoring Method of Check Dams in Semi-arid Area of the Loess Plateau

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 31 Number of periods: 2024 04 Page number: 59-66,85 Column: Public date: 2024-06-30

Title:: Safety Monitoring Method of Check Dams in Semi-arid Area of the Loess Plateau

Author(s):: Gao Yayu¹, Huang Xiao¹, Song Yu¹, He Wenbo¹, Hua Rongxiang², Gao Jinfang², Lü Xixi³; (1.School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, China; 2.Institute of Soil and Water Conservation of Ganst Province, Lanzhou 730020, China; 3.National University of Singapore, Singapore 119077)

Keywords:: safety monitoring of check dam; point cloud; 3D deviation displacement; dam body deformation; Sijiagou watershed

CLC:: S157.1; P234.4

DOI:: 10.13869/j.cnki.rswc.2024.04.013

Abstract:: [Objective]The aims of this study are to monitor the deformation degree of check dam after flood season in semi-arid area of the Loess Plateau and find the abnormal condition of check dam timely and accurately, and to provide a more scientific and reliable technical method for the safety monitoring of check dams in the semi-arid region of the Loess Plateau. [Methods]The two check dams were scanned by a 3D laser scanner, and high-density, high-precision, continuous and complete 3D point cloud data were obtained. Then, the point cloud data were imported into HD Scene software for point cloud pre-processing, and finally, modeling and comparative analysis were performed by Cloud Compare and Geomagic Control software. [Results]The comparison of point cloud models between the two periods showed that the offset of a large number of point clouds in the Donggou check dam model was less than 0.05 cm, and a small number of point clouds reached the maximum offset of 0.2 cm. The offset of a large number of point clouds in the Xigou check dam model was less than 0.1 cm, and a very small number of point clouds reached the maximum offset of 0.4 cm. The precipitation in flood season accounted for 77.34% of the whole year. After flood season, both of the two check dams had small settlement and horizontal displacement, but the deformation of Xigou check dam was more obviously affected by water pressure component. [Conclusion]The application of 3D laser scanning technology to the safety monitoring of check dams in semi-arid areas of the Loess Plateau can quickly and accurately know whether the deformation occurs after flood season and the degree of deformation, which makes the safety monitoring of check dams more accurate and reliable.

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Last Update: 2024-06-30