Noise Analysis of Resistivity Data at a Dam

Keun-Soo Lee; Ki-Ju Kim; Myung-Jin Ha; Ki-Seog Kim; Nam-Hyun Lee; In-Ky Cho

doi:10.7582/GGE.2026.29.1.001

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2026 Vol.29, Issue 1 Next Page

Research Article

Noise Analysis of Resistivity Data at a Dam 댐에서 얻어진 전기비저항 탐사 자료의 잡음 분석

28 February 2026. pp. 1-14

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Abstract

For a more accurate interpretation of resistivity data, noise must be properly understood and quantified as much as possible. Because measurement errors can play a pivotal role in the inversion, accurate specification of measurement errors is essential to obtain reliable, realistic inversion results. As a preliminary study to develop an effective method quantifying measurement errors, stacking and reciprocal errors were compared for their utility in describing measurement errors. For two resistivity datasets measured at a relatively noisy dam site, the relationships among the contact resistance, injection current, apparent resistivity, stacking error, and reciprocal error were analyzed. The results shows that the measurement error is significantly influenced by contact resistance and that the reciprocal error provides a good estimate of the measurement error. In contrast, the stacking error tends to underestimate the noise level.

Keywords

Electrical Resistivity Method

Noise

Stacking Error

Reciprocal Error

전기비저항 탐사 자료의 더 정확한 해석을 위해서는 잡음을 정확하게 이해하고 가능하면 정량화해야 한다. 측정 오차는 전기비저항 탐사자료의 역산에서 중요하다. 신뢰도가 높고 현실적인 역산 결과 영상을 얻으려면 측정 오차를 정확하게 예측하는 것이 중요하다. 측정 오차를 정량화하는 효과적인 방법을 개발하기 위한 예비 연구로서, 중합오차와 상반성오차를 측정 오차를 비교하였다. 비교적 잡음수준이 높을 것으로 예상되는 댐에서 측정된 두 전기비저항 탐사 자료에 대해 접촉 저항, 주입 전류, 겉보기 전기비저항, 중합오차, 그리고 상반성오차들 사이의 관계를 분석하였다. 분석 결과 측정 오차는 접촉 저항에 크게 영향을 받으며, 상반성오차는 측정 잡음을 적정하게 평가하는 반면, 중합오차는 저평가하는 경향을 나타내었다.

키워드

전기비저항 탐사

잡음

중합오차

상반성오차

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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 :1
Pages :1-14
Received Date : 2025-10-01
Revised Date : 2026-02-13
Accepted Date : 2026-02-23
DOI :https://doi.org/10.7582/GGE.2026.29.1.001

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

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