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Electrical Resistivity Imaging of Suspected Seepage Channels in an Earthen Dam in Zaria, North-Western Nigeria

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DOI: 10.4236/ojapps.2013.31020    4,685 Downloads   8,558 Views   Citations


To determine and map the subsurface conditions of a dam, a 2D electrical resistivity tomography study was carried out within the two flanks of Zaria dam at Shika. This was done to ascertain if the variations in the volume of water content in the dam is due to an anomalous seepage beneath the subsurface or seasonal effects. On the basis of the interpretation of the acquired data, various zones of relatively uniform resistivity values were mapped and identified. The first zone is characterized by moderate resistivity values of 150 - 600 ohm-m. It represents unsaturated topsoil with thicknesses varying from 1 - 4.5 m. The second (intermediate depth) resistivity zone, with values ranging from 5 - 100 ohm-m and thickness varying from 3.5 - 10 m, represents a silt clay layer with high moisture content. The third resistivity zone represents fairly weathered granite and is characterized by relatively high resistivity values ranging from 700 - 6000 ohm-m. The available borehole log data correlated well with the pseudo-sections in relation to the obtained resistivity values and depth. Zones of relatively low resistivity within the bedrock are interpreted to represent potential seepage pathways. Hence, this geophysical method can be successfully used to delineate and map these seepage pathways within the subsurface of the earth dam.

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The authors declare no conflicts of interest.

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A. Chinedu and A. Ogah, "Electrical Resistivity Imaging of Suspected Seepage Channels in an Earthen Dam in Zaria, North-Western Nigeria," Open Journal of Applied Sciences, Vol. 3 No. 1, 2013, pp. 145-154. doi: 10.4236/ojapps.2013.31020.


[1] M. H. Loke and R. D. Barker, “Least-Squares Deconvolution of Apparent Resistivity Pseudosections,” Geophy sics, Vol. 60, No. 6, 1995, pp. 1682-1690.
[2] M. H. Loke and R. D. Barker, “Rapid Least-Squares In version of Apparent Resistivity Pseudosections by Quasi Newton Method,” Geophysical Prospecting, Vol. 44, No. 1, 1996, pp. 131-152.
[3] M. H. Loke, “Electrical Imaging Surveys for Environment and Engineering Studies (A Practical Guide to 2D and 3D Surveys),” Earth Sciences, Vol. 6574525, No. 1999.
[4] M. H. Loke, “Tutorial: 2D and 3D Electrical Imaging Surveys,” 2004.
[5] S. Johansson and T. Dahlin, “Seepage Monitoring in an Earth Embankment Dam by Repeated Resistivity Measurements,” European Journal of Engineering and Geophysics, Vol. 1, 1996, pp. 229-247.
[6] G. Z. A. Aal, A. M. Ismail, N. L. Anderson and E. A. Atekwana, “Geophysical Investigation of Seepage from an Earth Fill Dam, Washington County, MO.,” Journal of Applied Geophysics, Vol. 44, 2004, pp. 167-180.
[7] T. V. Panthulu, C. Krishnaiah and J. M. Shirke, “Detection 407 of Seepage Paths in Earth Dams Using Self-Potential and Electrical Resistivity Methods,” Engineering Geology, Vol. 59, No. 3-4, 2007, pp. 281-295. doi:10.1016/S0013-7952(00)00082-X
[8] T. Dahlin and S. Johansson, “Resistivity Variations in an Earth Embankment Dam in Sweden,” 1st Meeting Environmental and Engineering Geophysics, Torino, 25-27 September 1995, p. 4.
[9] I. Cho and J. Yeom, “Crossline Resistivity Tomography for the Delineation of Anomalous Seepage Path Ways in an Embankment Dam,” Geophysics, Vol. 72, No. 2 2007, pp. 31-38. doi:10.1190/1.2435200
[10] R.C. Benson, R. Glaccum and M. Noel, “Geophysical Techniques for Sensing Buried Wastes and Waste Migra tion (NTIS PB84-198449),” US EPA Environmental Monitoring Systems Laboratory, Las Vegas, 1984, p. 236.
[11] I. B. Osazuwa and A. D. Chinedu, “Seismic Refraction Tomography Imaging of High Permeability Zones Beneath an Earthen Dam, in Zaria Area, Nigeria,” Journal of Applied Geophysics, Vol. 66, 2008, pp. 44-58.
[12] Y. A. Karofi, “Interim Report on the Geology of 1:100,000 Sheet 102 (Zaria),” Geological Survey of Nigeria, 1973.
[13] P. McCurry, “Geology of Degree Sheet 21 Zaria, Nigeria,” Overseas Geology Mineral Research, Vol. 45, 1973, p. 45.
[14] Water and Power Development Company (WAPDECO), “Kaduna State Water Board Rehabilitation Study, Part 1, Zaria Water Supply Scheme,” Final Report, 1991.
[15] M. B. Dobrin and F. Savit, “Introduction to Geophysical Prospecting,” McGraw-Hill Company Ltd., NewYork. 1988.
[16] W. M. Telford, L. P. Geldart and R. E. Sheriff, “Applied Geophysics,” Cambridge University Press, New York, 1990. doi:10.1017/CBO9781139167932
[17] D. H. Griffiths and R. D. Barker, “Two-Dimensional Resistivity Imaging and Modeling in Areas of Complex Geology,” Journal of Applied Geophysics, Vol. 29, No. 3-4, 1993, pp. 211-226. doi:10.1016/0926-9851(93)90005-J
[18] GEOTOMO SOFTWARE, “Rapid 2D Resistivity and IP Inversion Using the Least Squares Method. Wenner (α, β, γ), Dipole-Dipole, Inline Pole-Pole, Pole-Dipole, Equatorial Dipole Dipole, Schlumbeger and Non-Conventional Arrays,” On Land, Underwater and Cross-Borehole Surveys, 2001.
[19] C. De Groot-Hedlin and S. C. Constable, “Occam’s In version to Generate Smooth, Two Dimensional Models from Magneto Telluric Data,” Geophysics, Vol. 55, No. 12, 1990, pp. 1613-1624. doi:10.1190/1.1442813
[20] A. Tarantola, “The Inverse Theory,” Academic Press Inc., Cambridge, 1987.
[21] W. Zhou, F. Beck and A. Adams, “Effective Electrode Array in Mapping Karst Hazards In Electrical Resistivity Tomography, Annealing Optimization for Inversion of First Arrival Times,” Bulletin of the Seismological Society of America, Vol. 84, No. 5, 2002, pp. 1397-1409.
[22] A. C. Okoro, “Interim Report on the Geology of 1:100,000 Sheet 101 (Maska),” Geological Survey of Nigeria, 1973.
[23] National Water Resources Institute (NWRI), “Ground water Research Development,” Completion Report, 2008, Borehole NR. GWR/HG-05(1/6).

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