Several Results from our Near-surface Geoelectric Investigations

In this presentation we illustrate some of our results from the last few years. We calculated among others the consequences of incorrect positioning of the electrodes for various multielectrode systems. In practice we found these effects negligible with the exception of rocky surface, where it is impossible to put the electrodes in the desired positions. We carried out tensorial geoelectric measurements around a Monastery. These measurements provided much more detailed and unambiguous anomalies than 2D profile measurements. We tested the applicability of 3-D electrical resistivity tomography (ERT) technique to detect landmines in different soil conditions and at various depths. Metallic and non-metallic landmines buried in wet and dry soils had been synthetically modeled. We elaborated furthermore a geoelectrical procedure to map multidirectional fissure systems by combining geoelectrical profiling and geoelectrical azimuthal measurements. Results received by using both the so-called null-, and traditional arrays were jointly interpreted. At last we present a new technique, the so-called standardized pricking probe (PP) surveying technique and demonstrate its usefulness in an archaeological study. The optimum PP parameters: horizontal interval, pricking depth, observable quantity and its way of presentation were optimized through field experiments.