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Assessing the efects of 1D assumption violation in vertical electrical sounding (VES) data processing and interpretation

Identyfikatory
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
This research aimed to discover the possible efects of 1D assumption violations on VES data interpretations. In order to do so, 1D inversion results of logarithmically spaced and linearly spaced VES measurements are compared with their relevant 2D inverted models. Some real case studies are also examined by 1D and 2D inversions to test the results. It is found that linearly spaced VES measurements are not really suitable for 1D inversion in the case of 1D assumption violations and logarithmically spaced VES can better handle these problematic features. In the case of semi-infnite horizontal layers and also small surface resistivity inhomogeneities, logarithmically spaced VES datasets mostly provide a reliable 1.5D model while linearly spaced VES datasets sufer from remarkable artifacts. In the case of vertical structures, both linearly spaced and logarithmically spaced VES techniques fail. In this case (i.e., a vertical dike), artifacts in the form of “extra layer” appear in those VES stations that are adjacent to the dike. However, for VES stations on the dike structure, no extra layer appears in the 1D inversion result. It must be emphasized that 1D violating features are not improbable in many geological situations so they must be considered in mind when processing and interpreting the geophysical VES data.
Czasopismo
Rocznik
Strony
105--122
Opis fizyczny
Bibliogr. 34 poz.
Twórcy
  • Department of Mining and Metallurgical Engineering, Amirkabir University of Technology (Tehran Polytechnic), 424 Hafez Ave, 15875-4413 Tehran, Islamic Republic of Iran
  • Department of Mining and Metallurgical Engineering, Amirkabir University of Technology (Tehran Polytechnic), 424 Hafez Ave, 15875-4413 Tehran, Islamic Republic of Iran
  • Department of Mining and Metallurgical Engineering, Amirkabir University of Technology (Tehran Polytechnic), 424 Hafez Ave, 15875-4413 Tehran, Islamic Republic of Iran
Bibliografia
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  • 23. Porsani JL, Filho WM, Elis VR, Shimeles F, Dourado JC, Moura HP (2004) The use of GPR and VES in delineating a contamination plume in a landfill site: a case study in SE Brazil. J Appl Geophys 55:199–209. https://doi.org/10.1016/j.jappgeo.2003.11.001
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Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-12e95b63-2bde-4429-96af-fe1bbd5d7bce
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