Estimation of the error made in Pole–Dipole Electrical Resistivity Tomography depending on the location of the remote electrode Modeling and field study》.pdf

Journal of Applied Geophysics 100 (2014) 44 –57 Contents lists available at ScienceDirect Journal of Applied Geophysics journal homepa ge: /l ocate/j appgeo Estimation of the error made in Pole–Dipole Electrical Resistivity Tomography depending on the location of the remote electrode: Modeling and field study Stephen Razafindratsima ⁎, Jean-François Lataste Université Bordeaux 1, I2M — Department of Environmental and Civil Engineering, avenue des Facultés, 33405 Talence, France a r t i c l e i n f o a b s t r a c t Article history: Objective: The objective was to estimate the error made in Electrical Resistivity Tomography (ERT) when Pole– Received 27 February 2013 Dipole array (PD) is used, as a function of the location of the remote electrode. Accepted 31 October 2013 Methods: First, we carried out a parametrical analysis to quantify the error in the geometrical factor and in the Available online 11 November 2013 apparent resistivity using analytical calculation and numerical model based on the general moment method. Then, the influence of the remote electrode location was studied considering PsPD (Pseudo-Pole–Dipole i.e. when Keywords: the exact location of the remote electrode is used even when finite) in comparison to PDbias (Pole–Dipole bias i.e. Pole–dipole Remote electrode remote electrode is considered at infinity even when finite). Anomaly Effect (AE) with new consideration of t