Comparison of the Spatial Resolution of Standard and Optimised Electrical Resistivity Tomography Arrays

Two new ERT array optimisation strategies are presented that attempt to maximise the spatial resolution of the image for a given number of measurements. Synthetic modelling studies and inversions are used to assess the performance of the optimised arrays against arrays of standard Wenner-Schlumberger and Dipole-Dipole configurations. For the same number of configurations, the optimised arrays are found to perform at least as well as, and mostly better than, the standard arrays.