The Effect of Finite Electrodes on ERT Measurements Simulated with the Complete Electrode Model

In the inversion of ERT measurements we usually treat the electrodes as points. However, for small-scale arrays, e.g. lysimeter studies, this assumption may lead to severe misinterpretations. We present a method to incorporate both the electrode shape and its contact impedance in the finite element simulation using the complete electrode model. We show that for small-scale measurements the electrode shape can affect the measurements significantly.