MULTICHANNEL ELECTRIC SURVEY METHOD WITH CAPACITOR METHOD

PROBLEM TO BE SOLVED: To obtain resistivity change in depth direction efficiently and exactly by enabling two-dimensionally analyzing identical to direct electric survey in electric survey using alternating current. SOLUTION: Alternating current voltage is impressed between a pair of current electrodes to send current in the ground of which electric potential is detected with a plurality of pairs of electric potential electrodes, and the position data of that measuring point at that moment is detected. From the electric potential data detected with each electric potential electrodes pairs, the apparent resistivity of alternating current is obtained, which is converted to direct current resistivity of homogeneous ground so as to correct the attenuation due to the frequency of the using alternating current and the distance between the current electrodes and electric potential electrodes, and based on the converted direct current resistivity and the position data of the measuring point, two dimensional analysis is conducted to obtain the true ground structure.