Depth of investigation and vertical resolution of surface geoelectric arrays

Sándor Szalai, Attila Novák, L. Szarka

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

Depth of investigation and vertical resolution values are determined and tabulated for 30 surface geoelectric arrays that have non-zero response, i.e., a depth of investigation characteristic (DIC) function due to a buried thin horizontal sheet. In accord with experience, results show a general reciprocal relationship between depth of investigation and vertical resolution. The most frequently used arrays in multi-electrode studies (i.e., Wenner-α, Wenner-β, Schlumberger, dipole-axial arrays and the pole-dipole array) offer reasonable compromises between depth of investigation and vertical resolution. Depth of investigation can be increased by using the pole-pole array; vertical resolution can be improved with, for example, the α10 or γ10 arrays. Current focussing does not increase the depth of investigation for the horizontal thin-sheet model. The complete set of depth of investigation and vertical resolution values permits exact physical comparison of various geoelectric arrays and provides simple but useful rules for practical geoelectric applications, e.g., how to develop multi-electrode systems with higher vertical resolution, or how to select arrays to satisfy special exploration requirements.

Original languageEnglish
Pages (from-to)15-23
Number of pages9
JournalJournal of Environmental and Engineering Geophysics
Volume14
Issue number1
DOIs
Publication statusPublished - Mar 2009

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ASJC Scopus subject areas

  • Environmental Engineering
  • Geophysics
  • Geotechnical Engineering and Engineering Geology

Cite this

Depth of investigation and vertical resolution of surface geoelectric arrays. / Szalai, Sándor; Novák, Attila; Szarka, L.

In: Journal of Environmental and Engineering Geophysics, Vol. 14, No. 1, 03.2009, p. 15-23.

Research output: Contribution to journalArticle

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