Some Considerations on the Apparent Resistivity in the Cross Hole Resistivity Method

M-28 SOME CONSIDERATIONS ON THE APPARENT RESISTIVITY IN THE CROSS HOLE RESISTIVITY METHOD I.K. CHO 1 J.H. KIM 2 and S.H. CHUNG 2 INTRODUCTION 1 For dc resistivity method conversion to apparent resistivity can be thought of as simply a normalization of the measured potential difference for the transmitted current and the geometric factor of the array so that the data can be presented in units of the intrinsic rock property-resistivity. In reality the sub-surface ground is not a homogeneous medium and thus the resistivity obtained is no longer the 'true' resistivity but the apparent resistivity which can even be