| Title |
Comparison of the Earth Resistivity Measured by the 3-Electrode and 4-Electrode Fall-of-Potential Methods |
| DOI |
http://dx.doi.org/10.5207/JIEIE.2013.27.2.095 |
| Keywords |
Earth Resistance ; Earth Resistivity ; Wenner Four-Electrode Method ; Three-Electrode Method ; Fall-of-Potential Method ; p-a Curve |
| Abstract |
This paper presents the comparison of the earth resistivity obtained from the measurements made with the three-electrode and four-electrode fall-of-potential techniques. The p-a curve obtained from Wenner four-electrode method in undisturbed earth is in good agreement with the p-1 curve obtained from the three-electrode method based on the fall-of-potential method. However, The p-a curve in disturbed earth with moisture and freezing is significantly different with the p-1 curve. The p-a curve is considerably sensitive to the freezing and the moisture present in the earth surface compared to the p-1 curve. Thus to determine the actual earth resistivity, it is necessary to take into account the earth surface conditions when measuring the earth resistivity. |