垃圾填埋场渗漏的频谱激电三维数值模拟

doi:10.11720/wtyht.2025.1384

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Abstract

The contamination of soils and groundwater caused by landfill leachate is increasingly prominent. Given the distinctive electrical properties of leachate, such as low resistivity, high polarization, high time constant, and low-frequency correlation coefficient, this study performed three-dimensional finite element numerical simulations of landfills using the spectral induced polarization (SIP) method. The aim is to explore the theoretical effects of this method in detecting landfill leachate. First, this study conducted forward modeling for typical geoelectric models using the algorithm developed in this study. The result revealed a maximum relative error between the numerical and analytical solutions of less than 2.5%, demonstrating the algorithm's accuracy and effectiveness. Second, the parameters of the SIP model were set based on the actual electrical characteristics of landfills, ensuring that the numerical simulations closely reflected actual conditions. Finally, SIP anomaly responses were compared and analyzed for landfill leachate leakage under different scenarios. The results indicate that the leachate locations can be accurately delineated using the apparent complex resistivity's phase and apparent dispersion, regardless of whether landfills are equipped with high-resistivity impermeable walls. For leachate plumes of the same scale, shallower locations corresponded to more pronounced anomaly morphologies of apparent complex resistivity's phase and apparent dispersion. Compared to the direct current resistivity method, the SIP method can detect richer underground electrical parameters, achieving better application effects in detecting landfill leachate.

Key words： spectral induced polarization (SIP) method numerical simulation landfill leachate finite element method

Received: 14 September 2024 Published: 07 August 2025

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	Articles by authors
	Jing SHI
	Bin XIONG
	Zhi-Feng XU
	Li-Shan HUANG
	Yu-Guo LU
	Yao-Xin LI
	Jia-Min YU

Cite this article:

Jing SHI,Bin XIONG,Zhi-Feng XU, et al. Three-dimensional numerical simulations of spectral induced polarization for detecting landfill leachate[J]. Geophysical and Geochemical Exploration, 2025, 49(4): 980-988.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2025.1384 OR https://www.wutanyuhuatan.com/EN/Y2025/V49/I4/980

Parameters of horizontal layered medium model

The real part (a) and imaginary part (b) of the apparent complex resistivity sounding curve by Schlumberger configuration

The relative error of the apparent complex resistivity sounding curve by Schlumberger configuration

Induced polarization parameters of media in landfill

Landfill without impermeable walls and no leachate of model 1

The contour of Dipole-Dipole configuration apparent complex resistivity components real part (a), imaginary part (b), phase (c) (f=1 Hz) and apparent dispersion (d) of model 1

Landfill without impermeable walls for central leakage of model 2

The contour of Dipole-Dipole configuration apparent complex resistivity components real part (a), imaginary part (b), phase (c) (f=1 Hz) and apparent dispersion (d) of model 2

Landfill without impermeable walls for bottom leakage of model 3

The contour of Dipole-Dipole configuration apparent complex resistivity components real part (a), imaginary part (b), phase (c) (f=1 Hz) and apparent dispersion (d) of model 3

Landfill with impermeable walls and no leachate of model 4

The contour of Dipole-Dipole configuration apparent complex resistivity components real part (a),imaginary part (b), phase (c) (f=1 Hz) and apparent dispersion (d) of model 4

Landfill with impermeable walls for central leakage of model 5

The contour of Dipole-Dipole configuration apparent complex resistivity components real part (a),imaginary part (b), phase (c) (f=1 Hz) and apparent dispersion (d) of model 5

Landfill with impermeable walls for bottom leakage of model 6

The contour of Dipole-Dipole configuration apparent complex resistivity components real part (a), imaginary part (b), phase (c) (f=1 Hz) and apparent dispersion (d) of model 6

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