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Three‐dimensional imaging of subsurface structures using resistivity data
Author(s) -
Yi MyeongJong,
Kim JungHo,
Song Yoonho,
Cho SeongJun,
Chung SeungHwan,
Suh JungHee
Publication year - 2001
Publication title -
geophysical prospecting
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.735
H-Index - 79
eISSN - 1365-2478
pISSN - 0016-8025
DOI - 10.1046/j.1365-2478.2001.00269.x
Subject(s) - inversion (geology) , regional geology , geology , economic geology , electrical resistivity and conductivity , hydrogeology , inverse problem , environmental geology , engineering geology , electrical resistivity tomography , finite element method , geophysics , mineralogy , seismology , geotechnical engineering , volcanism , mathematics , mathematical analysis , telmatology , physics , engineering , electrical engineering , tectonics , thermodynamics
We have developed a three‐dimensional inverse scheme for carrying out DC resistivity surveys, incorporating complicated topography as well as arbitrary electrode arrays. The algorithm is based on the finite‐element approximation to the forward problem, so that the effect of topographic variation on the resistivity data is effectively evaluated and incorporated in the inversion. Furthermore, we have enhanced the resolving power of the inversion using the active constraint balancing method. Numerical verifications show that a correct earth image can be derived even when complicated topographic variation exists. By inverting the real field data acquired at a site for an underground sewage disposal plant, we obtained a reasonable image of the subsurface structures, which correlates well with the surface geology and drill log data.