Estimation of Electrical Resistivity Error using Numerical Model for Waste Landfill Characterisation

Most of studies have shown that Electrical Resistivity Tomography (ERT) can be a suitable method to study relative water content variation for waste landfill applications or for waste characterisation in laboratory. The interpretation of resistivity variations is often debatable, a great number of studies show that there are some distortions or false variations of the interpreted resistivity induced by inversion processes (parameters or optimization methodology), array geometry (array type Wenner-Schlumberger, dipole-dipole or pole-dipole) or unit of electrode spacing. Mistakes on the apparent resistivity data induced by electrode shape at lab scale or by the presence of an insulating boundary at the field scale could impact analyse and disturb the interpretations. The aim of this paper is to demonstrate that variations of apparent resistivity at both scales could be induced by the device used and not by the porous media studied