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Comparison of Three Electrical Resistivity Arrays to Investigate Weak Zones in Soil, Along a Profile Southeast Baghdad City, Iraq


  • Hussein Abdulrahim Al-Saady PhD student, University of Baghdad, College of Science, Department of Geology, Baghdad, Iraq
  • Hussein H. Karim Professor, Civil Engineering Department, University of Technology - Iraq, Baghdad, Iraq
  • Firas H. AL-Menshed The General Commission for Groundwater, Ministry of Water Resources, Baghdad, Iraq



Comparison, Dipole-Dipole, Wenner, Schlumberger, Weak Zone


     The electrical resistivity method is one of the geophysical methods for detecting weak subsurface zone. The 2D resistivity data were used to compare three electrode configurations, Wenner, Dipole-dipole, and Schlumberger, to detect weak subsurface zones along a profile south of Baghdad near the Bismayah pumping station. The results show many zones of low resistivity that may be weak zones. A dipole-dipole array is a large number of measurements and is more sensitive than others. The Wenner-Schlumberger array has a depth also higher than other arrays. Wenner array has higher signal strength than other arrays. Because it is more sensitive to horizontal and vertical structures, the dipole-dipole array is the optimum for mapping subsurface weak zone.


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