Effectivity enhancement of azimuthal geoelectric measurements

S. Szalai, I. Kósa, T. Nagy, L. Szarka

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Citations (Scopus)

Abstract

For the hydrogeological characterization of fissured rocks it is very important to know the fissure directions. To determine the dominating directions geophysically, the so-called azimuthal geoelectric measurement had seemed to be a realistic way, until its shortages (false fissure directions in many cases) were revealed. In this paper, we improve the azimuthal measurement, on basis of analogue modelling, by using the Wenner array, which is generally applied in azimuthal measurements. We study how many azimuthal measurements are needed to be carried out to determine the dominating fissure directions (each in different measuring point over the investigated area, instead of one single measurement over the whole area as had been earlier suggested). In the model parameter range, we used to characterise three-directional fissure system, it is possible to apply the anisotropy paradox theory (which is not always the case). As we concluded from the model measurements, in order to determine solely the fissure directions, our improved method seems to be a bit expensive, however it is less expensive than the aquifer test. Involving further arrays, or combining the azimuthal measurements with profile geoelectric measurements, we expect a more reliable solution at a somewhat reduced cost.

Original languageEnglish
Title of host publicationNear Surface 2009 - 15th European Meeting of Environmental and Engineering Geophysics
PublisherEuropean Association of Geoscientists and Engineers, EAGE
ISBN (Print)9073781728, 9789073781726
Publication statusPublished - Jan 1 2009
Event15th European Meeting of Environmental and Engineering Geophysics of the Near Surface Geoscience Division of EAGE, Near Surface 2009 - Dublin, Ireland
Duration: Sep 7 2009Sep 9 2009

Publication series

NameNear Surface 2009 - 15th European Meeting of Environmental and Engineering Geophysics

Other

Other15th European Meeting of Environmental and Engineering Geophysics of the Near Surface Geoscience Division of EAGE, Near Surface 2009
CountryIreland
CityDublin
Period9/7/099/9/09

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ASJC Scopus subject areas

  • Geophysics
  • Geotechnical Engineering and Engineering Geology

Cite this

Szalai, S., Kósa, I., Nagy, T., & Szarka, L. (2009). Effectivity enhancement of azimuthal geoelectric measurements. In Near Surface 2009 - 15th European Meeting of Environmental and Engineering Geophysics (Near Surface 2009 - 15th European Meeting of Environmental and Engineering Geophysics). European Association of Geoscientists and Engineers, EAGE.