f Geoelectric investigation of flood-control embankments: two case histories

Big floods of late years necessitate the detailed status survey of the river embankments to mark out the segments to be repaired. An efficient tool for this purpose is the geoelectrical geophysical measurement. The inhomogeneities in the dam (fissures, cracks, mudded zones, etc.) are in general threedimensional and small in size, therefore their detection needs lot of measurements and for this reason a quick, efficient measuring system and at least two-, but in the most cases threedimensional interpretation procedures. Purpose of investigation is always the determination of the three-dimensional resistivity distribution of the subsoil with as big horizontal and vertical resolution as possible. We present two examples for the measurements performed using multi-electrode geoelectric measuring system (GRM-30) developed and manufactured in KBFI TRIAS Ltd., Hungary.