Nonlinear Processes in Geophysics www.nonlin-processes-geophys.net 1023-5809 1607-7946 15 6 2008 10.5194/npg-15-977-2008 http://www.nonlin-processes-geophys.net/15/977/2008/ http://www.nonlin-processes-geophys.net/15/977/2008/npg-15-977-2008.html http://www.nonlin-processes-geophys.net/15/977/2008/npg-15-977-2008.pdf 977 986 2008-12-11 Contribution of 3-D electrical resistivity tomography for landmines detection M. Metwaly mmetwaly70@yahoo.com G. El-Qady J. Matsushima S. Szalai N. S. N. Al-Arifi A. Taha National Research Institute of Astronomy and Geophysics (NRIAG), 11722 Helwan, Cairo, Egypt Geosystem Engineering Department, Graduate School of Engineering, The University of Tokyo, Japan Geodetic and Geophysical Research Institute of the Hungarian Academy of Science, University of West Hungary, 9400 Sopron, Csatkai u. 6–8, Hungary Geology Department, Collage of Science, King Saud University, Saudi Arabia Al-Quwiy'yia Community College, King Saud University, Saudi Arabia Landmines are a type of inexpensive weapons widely used in the pre-conflicted areas in many countries worldwide. The two main types are the metallic and non-metallic (mostly plastic) landmines. They are most commonly investigated by magnetic, ground penetrating radar (GPR), and metal detector (MD) techniques. These geophysical techniques however have significant limitations in resolving the non-metallic landmines and wherever the host materials are conductive. In this work, the 3-D electric resistivity tomography (ERT) technique is evaluated as an alternative and/or confirmation detection system for both landmine types, which are buried in different soil conditions and at different depths. This can be achieved using the capacitive resistivity imaging system, which does not need direct contact with the ground surface. Synthetic models for each case have been introduced using metallic and non-metallic bodies buried in wet and dry environments. The inversion results using the L₁ norm least-squares optimization method tend to produce robust blocky models of the landmine body. The dipole axial and the dipole equatorial arrays tend to have the most favorable geometry by applying dynamic capacitive electrode and they show significant signal strength for data sets with up to 5% noise. 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