A Feasibility Study on 3D Inversion of Grid-Based 2D Electrical Resistivity Data for Landfill Sites

Chul Hee Lee; Su In Jeon; Yongjae Lee; Yoonsup Moon; Young-Kyu Kim; Gi Tae Nam; Won-Ki Kim

doi:10.7582/GGE.2026.29.2.112

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2026 Vol.29, Issue 2 Preview Page Next Page

Research Article

A Feasibility Study on 3D Inversion of Grid-Based 2D Electrical Resistivity Data for Landfill Sites 격자형 2차원 전기비저항 자료를 이용한 매립지 3차원 역산 적용성 평가

31 May 2026. pp. 112-120

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Abstract

Effective management of environmental contamination at landfill sites requires the use of highly reliable monitoring techniques, and precise investigations that utilize three-dimensional (3D) spatial information are particularly important. In this study, a 3D inversion was performed using two-dimensional (2D) electrical resistivity survey data acquired from survey lines arranged in a grid pattern at the 2nd Sudokwon landfill site, and it’s the feasibility of this approach for landfill applications was examined. The survey was conducted through a combined inversion of data acquired with 5 m and 10 m electrode spacings to ensure shallow resolution and sufficient investigation depth. In addition, to analyze the effect of data density on the 3D inversion results, inversions were performed for two cases with survey line intervals of 25 m and 50 m, and the results were compared. The analysis revealed that 3D inversion using 2D survey data had a limitation: a grid-like pattern reflecting the survey line geometry appeared in the shallow subsurface, owing to its dependence on the input data. This methodological characteristic arises from the grid-shaped survey line configuration, and its effect tends to decrease with increasing depth. Nevertheless, the method effectively delineated the 3D spatial distribution of high-resistivity zones associated with the upper gravel cover layer and low-resistivity zones influenced by leachate, thereby confirming its potential as an economical and efficient 3D electrical resistivity investigation technique for landfill sites. Furthermore, narrower survey line spacing enhances spatial resolution, demonstrating that ensuring sufficient data density is critical for obtaining reliable 3D inversion results.

Keywords

Landfill

Electrical Resistivity

3D Inversion

Data Density

매립지에서 발생하는 환경오염을 효과적으로 관리하기 위해서는 신뢰도 높은 모니터링 기법의 적용이 필수적이며, 특히 3차원 공간 정보를 활용한 정밀 조사의 필요성이 높다. 본 연구에서는 수도권 제2매립장을 대상으로, 격자 형태로 배치된 측선에서 획득한 2차원 전기비저항 탐사 자료를 이용하여 3차원 역산을 수행하고, 매립지에 대한 적용 가능성을 검토하였다. 탐사는 천부 해상도 확보를 위한 5 m 전극 간격 자료와 탐사 심도 확보를 위한 10 m 전극 간격 자료를 복합 역산하여 수행하였다. 또한, 자료 밀집도가 3차원 역산 결과에 미치는 영향을 분석하기 위해 측선 간격 25 m와 50 m의 두 경우에 대해 역산을 수행하고 결과를 비교하였다. 분석 결과, 2차원 탐사 자료를 이용한 3차원 역산은 입력 자료에 대한 의존성으로 인해 표층부에서 측선 형태의 격자 패턴이 나타나는 한계가 존재하였다. 이는 격자 형태의 측선 배치에 따른 방법론적 특성으로, 심도가 증가할수록 그 영향이 감소하는 경향을 보였다. 그러나 상부 자갈층에 의한 고비저항대와 침출수의 영향을 받은 저비저항대의 3차원 공간 분포를 효과적으로 파악할 수 있어, 경제적이고 효율적인 매립지 3차원 전기비저항 조사 기법으로서의 가능성을 확인하였다. 또한, 측선 간격이 좁을수록 공간 분해능이 향상되어, 신뢰도 높은 3차원 역산 결과를 얻기 위해서는 충분한 자료 밀집도의 확보가 중요함을 확인하였다.

키워드

매립지

전기비저항

3차원 역산

자료 밀집도

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Information

Publisher :Korean Society of Earth and Exploration Geophysicists
Publisher(Ko) :한국지구물리물리탐사학회
Journal Title :Geophysics and Geophysical Exploration
Journal Title(Ko) :지구물리와 물리탐사
Volume : 29
No :2
Pages :112-120
Received Date : 2026-05-11
Revised Date : 2026-05-17
Accepted Date : 2026-05-21
DOI :https://doi.org/10.7582/GGE.2026.29.2.112

Geophysics and Geophysical Exploration ISSN:1229-1064(Print) 2384-051X(Online) 지구물리와 물리탐사

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