The 2D resistivity imaging method in mountainous area over different slope
Keywords:2D resistivity imaging method, Mountainous areas
AbstractAssessing the reliability of the 2D electrical resistivity imaging method is investigated in mountainous areas. Several profiles are surveyed on different surface slopes ranging between 17° to 55° degrees. Two types of electrode arrays with different electrode spacing (2.0, 3.0 and 5.0 meters) are used. Repeated measurements are carried out for each profile by using different field parameters such as data density, pulse duration and voltage. The inverse sections are compared with the drilled bore holes in the area. The results show that the 2D resistivity imaging works well in the mountainous area when suitable field parameters are selected. The study has proved that the inverse sections are highly sensitive to the number of data points. The optimal number of data points has direct relation with surface slope, number of electrodes and electrode spread. On the other hand pulse durations and voltages magnitude have no significant effects on the quality of the field data. An empirical equation is suggested for the optimal acceptable number of data points that has a direct relation to the profile length, number of electrodes, electrode spacing and angle of the slope.
-Dahlin, T., 1996: 2D resistivity surveying for environmental and engineering applications. First Break, 14, PP 275-284.
-Dahlin, T., and Owen, R., 1998: Geophysical investigation of alluvial aquifer in Zimbabwe, Procs. 4th Meeting Environmental and Engineering Geophysics, Barcelona, Spain, 14-17 Sept, Pp 69-72.
-Dahlin, T., Glatz, D., and Persson, N., 1999: Electrical and magnetic investigations of deep aquifers in north Matabeleland, Zimbabwe, Procs., EEGS99, Budapest, Hungary.
-El-Qady, G., Sakamato, C., and Ushijima, K, 1999: 2-D inversion of VES data in Saqqara archaeological area, Egypt, Earth Planet Space Journal, 51, PP 1091-1098.
-Gwaze, P., Dahlin, T., Owen,.R., Gwavava, O., and Danielsen, J., 2000: Geophysical investigation of the Karoo aquifer at Nyamandhlovu, Zimbabwe, Procs. EEGS00, Bochum, Germany.
-Jassim, S.Z. and Goff, J.C., 2006: Geology of Iraq, publication of Dolin, Prague and Moravian Museum, Brno, 341p.
-Loke, M.H., and Dahlin T.2002: A combine Gauss-Newton and Quasi-Newton inversion methods for interpretation of apparent resistivity pseudosections, Paper presented at the 3rd Meeting of the Environmental and Engineering geophysics Society-European Section, Sept. 1997, Aarhus, Denmark.
-Loke, M.H., 2004:Tutorial: 2-D and 3-D electrical imaging surveys, [email protected], 127P. Mendoza, A., Bjelm, L. and Dahlin, T., 2000: Resistivity imaging as a tool for groundwater studies at Santo Domingo, central Nicaragua, Procs. EEGS 00 Bochum, Germany, 3-7 September 2000, EL 15.
-Pham, V.N., Boyer, D., Mouel, L.J. and Nguyen, T.K., 2002: Hydro geological investigation in the Mekong Delta around Ho-Chi-Minh City (south Vietnam) by electric tomography, C.R Geosciences, 334, PP 733-740.
-Shamsuddin, S. and Sanker, K.N., 2002: GIS Integration of remote sensing and electrical sounding data for hydrogeological exploration, Journal of Spatial Hydrology, 2, No.1, PP 1-12.
-Slater, L., Binley, A.M., Zaidman, M.D., and, West, L.J., 1997: Investigation of vadose zone flow mechanisms in unsaturated chalk using cross-borehole ERT. Proceedings of the EEGS European Section 3rd Meeting, Aarhus, Denmark, PP 17- 20.
-Slater, L., Reeve, A. and Glaser, D., 2001: Improving understanding of peat land hydrogeology using electrical geophysics, Faculty research, University of Missouril.
-Williams, L.J., 2002: The role of two-dimensional direct-current resistivity profiling in a water-resource investigation: Application to groundwater exploration and development in igneous and metamorphic rocks of the Georgia Piedmont/ Blue Ridge. Unpublished PhD thesis, Lund University, 187 P.
Copyright (c) 2013 Bakhtiar Qader Aziz
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.