Comparison of Wenner and dipole?dipole arrays in the study of an underground three-dimensional cavity

The objective of this paper was to compare Wenner and dipole-dipole configurations in delineating an underground cavity at a site near the University of Malaya, Malaysia. A three-dimensional electrical resistivity imaging survey was carried out along seven parallel lines using Wenner and dipole-dipole arrays. A three-dimensional least-squares algorithm, based on the robust inversion method, was used in the inversion of the apparent resistivity data. In the inverted model, both the horizontal and vertical extents of the anomalous zones were displayed. Results indicate the superiority of the Wenner array over the dipole-dipole array for determining the vertical distribution of the subsurface resistivity, although the dipole-dipole array produced a better lateral extent of the subsurface features. The results show that the three-dimensional electrical resistivity imaging survey using both the Wenner and dipole-dipole arrays, in combination with an appropriate three-dimensional inversion method and synthetic model analysis, can be highly useful for engineering and environmental applications, especially for underground three-dimensional cavity detection.

[1]  T. Dahlin,et al.  Quasi-3D resistivity imaging - mapping of three dimensional structures using two dimensional DC resistivity techniques , 1997 .

[2]  Fernando A. Monteiro Santos,et al.  2D joint inversion of dc and scalar audio-magnetotelluric data in the evaluation of low enthalpy geothermal fields , 2007 .

[3]  Wanfang Zhou,et al.  Effective electrode array in mapping karst hazards in electrical resistivity tomography , 2002 .

[4]  R. Barker,et al.  Practical techniques for 3D resistivity surveys and data inversion1 , 1996 .

[5]  D. Oldenburg,et al.  METHODS FOR CALCULATING FRÉCHET DERIVATIVES AND SENSITIVITIES FOR THE NON‐LINEAR INVERSE PROBLEM: A COMPARATIVE STUDY1 , 1990 .

[6]  Y. Rotstein,et al.  Cave detection and 4-D monitoring: A microgravity case history near the Dead Sea , 2001 .

[7]  Gad El-Qady,et al.  3D inversion of VES data from the Saqqara archaeological area, Egypt: a case study , 2005 .

[8]  T. Dahlin.  2D resistivity surveying for environmental and engineering applications , 1996 .

[9]  P. Cosentino,et al.  Comparative tests on different multi-electrode arrays using models in near-surface geophysics , 2009 .

[10]  On the 3-D inversion of vertical electrical soundings: Application to the South Ismailia area—Cairo desert road, Cairo, Egypt , 2008 .

[11]  Jong-Oh Park,et al.  Electrical resistivity surveys for gold-bearing veins in the Yongjang mine, Korea , 2009 .

[12]  Klaus Spitzer,et al.  The three‐dimensional DC sensitivity for surface and subsurface sources , 1998 .

[13]  Christian Bernstone,et al.  A Roll-Along Technique For 3D Resistivity Data Acquisition With Multi-Electrode Arrays , 1997 .

[14]  J. Claerbout,et al.  Robust Modeling With Erratic Data , 1973 .

[15]  Fernando A. Monteiro Santos,et al.  A study of the groundwater seepage at Hibis Temple using geoelectrical data, Kharga Oasis, Egypt , 2006 .

[16]  Filippos Vallianatos,et al.  Use of engineering geophysics to investigate a site for a building foundation , 2007 .

[17]  Ali Ismet Kanli,et al.  Imaging of buried 3D objects by using electrical profiling methods with GPR and 3D geoelectrical measurements , 2007 .

[18]  A. Dey,et al.  Resistivity modeling for arbitrarily shaped three-dimensional structures , 1979 .

[19]  Matthew J. Yedlin,et al.  Some refinements on the finite-difference method for 3-D dc resistivity modeling , 1996 .

[20]  M. Loke.  Tutorial : 2-D and 3-D electrical imaging surveys , 2001 .

[21]  L. S. Edwards,et al.  A modified pseudosection for resistivity and IP , 1977 .

[22]  Douglas W. Oldenburg,et al.  Applied geophysical inversion , 1994 .

[23]  T. Dahlin,et al.  A 3-D resistivity investigation of a contaminated site at Lernacken, Sweden , 2002 .

[24]  A. P. Annan,et al.  Water table detection with ground‐penetrating radar , 1991 .

[25]  A. Casas,et al.  Detection of underground cavities by combining gravity, magnetic and ground penetrating radar surveys: a case study from the Zaragoza area, NE Spain , 2008 .

[26]  M. Waelkens,et al.  Two‐dimensional resistivity imaging: a tool in archaeoseismology. An example from ancient Sagalassos (Southwest Turkey) , 2004 .

[27]  Keisuke Ushijima,et al.  2-D inversion of VES data in Saqqara archaeological area, Egypt , 2003 .

[28]  Y. L. Ekinci,et al.  3D resistivity imaging of buried tombs at the Parion necropolis (NW Turkey) , 2007 .