基于三维电阻率反演的滑坡地质灾害调查——以无锡市雪浪山景区滑坡为例

doi:10.11720/wtyht.2024.0121

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Abstract

Effectively identifying the stratigraphic and landslide structures in landslide-prone areas is significant for disaster prevention and mitigation. By investigating the landslides in the Xuelang Mountain scenic spot in Wuxi, this study analyzed the differences between two-and three-dimensional inversion using the high-density resistivity method. Accordingly, this study explored methods for eliminating the banded effect in the three-dimensional inversion, performed three-dimensional resistivity inversion under the constraints of high-precision surface elevation data and borehole-derived prior information, and constructed a three-dimensional geological model for the study area. The results indicate that three-dimensional resistivity inversion enjoys distinct advantages in complex landslide surveys. The banded effect can be effectively suppressed by optimizing the grid spacing, damping coefficient, and filter parameters for inversion. Furthermore, the terrain-induced impacts and the multiplicity of solutions of the inversion can be significantly reduced using constraints of refined terrain data and prior information, thus improving the resolutions of stratigraphic boundaries and landslide structures. Through three-dimensional resistivity inversion and geological modeling, this study determined the three-dimensional stratigraphic structure, along with the spatial distributions of the landslide bodies and sliding surfaces, and investigated landslide mechanisms, providing important data for the survey and control of landslides in the study area.

Key words： landslide high-density resistivity method three-dimensional inversion geological modeling

Received: 26 March 2024 Published: 08 January 2025

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	Articles by authors
	Guo-Qing JIANG
	She-Feng HAO
	Yong-Xiang YU
	Jian-Guo Du
	Ming LI
	Tong-Xiao SHANG
	Jing-Lei SONG

Cite this article:

Guo-Qing JIANG,She-Feng HAO,Yong-Xiang YU, et al. Landslide survey based on three-dimensional resistivity inversion: A case study of the Xuelang Mountain scenic spot, Wuxi, China[J]. Geophysical and Geochemical Exploration, 2024, 48(6): 1720-1729.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2024.0121 OR https://www.wutanyuhuatan.com/EN/Y2024/V48/I6/1720

Landslide form and deployment of ERT in the study area

Statistical table of regional physical parameters

Comparison of resistivity images for reducing banding effect

Comparison of two-dimensional and three-dimensional resistivity inversion results

3D inverse resistivity and interpretation section of line E3

3D inverse resistivity and interpretation stereogram in key areas

3D stratigraphic structure model in key area

3D landslide morphology and structure model in key area

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