Optimizing Surface-to-tunnel ERT Measurements

The applicability of tunnel-to-surface electrical resistance tomography (ERT) measurements for imaging subsurface targets is studied in this work. Various issues of this special arrangement are discussed and explored by means of synthetic, simulation tank and real data examples. In particular different electrode arrays including experimentally chooses optimum ones are examined and compared for various targets. Further, the significance of the tunnel effect as well as the accuracy of the electrode positioning in relation to the measured arrays is examined. Ways for taking tunnel effect as well as electrode positioning errors into account while selecting optimum electrode arrays are proposed.