TY - GEN
T1 - Comparing the ground resistivity measured by DC and capacitively-coupled resistivity methods
AU - Niu, Q.
AU - Wang, Y. H.
PY - 2013
Y1 - 2013
N2 - The Capacitively-Coupled (CC) resistivity method is an emerging geophysical technique for near surface investigations. Compared with the conventional Direct Current (DC) resistivity method, the CC resistivity method can be used with less restrictions and time consumption because there is no need to install steel electrodes. However, discrepancy in the measured apparent resistivity between the DC and CC resistivity methods can be found. Field measurements in this study demonstrate that if the arrays used in the DC and CC resistivity methods have a similar sensitivity function, i.e., similar depthinvestigation characteristics, the measured apparent resistivity from the two methods is comparable and vice versa. In addition, the gap effect in the CC resistivity methods using OhmMapper can produce errors that cannot be simply ignored if the ground surface is very rough.
AB - The Capacitively-Coupled (CC) resistivity method is an emerging geophysical technique for near surface investigations. Compared with the conventional Direct Current (DC) resistivity method, the CC resistivity method can be used with less restrictions and time consumption because there is no need to install steel electrodes. However, discrepancy in the measured apparent resistivity between the DC and CC resistivity methods can be found. Field measurements in this study demonstrate that if the arrays used in the DC and CC resistivity methods have a similar sensitivity function, i.e., similar depthinvestigation characteristics, the measured apparent resistivity from the two methods is comparable and vice versa. In addition, the gap effect in the CC resistivity methods using OhmMapper can produce errors that cannot be simply ignored if the ground surface is very rough.
UR - http://www.scopus.com/inward/record.url?scp=84866906462&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84866906462
SN - 9780415660709
T3 - Geotechnical and Geophysical Site Characterization 4 - Proceedings of the 4th International Conference on Site Characterization 4, ISC-4
SP - 963
EP - 969
BT - Geotechnical and Geophysical Site Characterization 4 - Proceedings of the 4th International Conference on Site Characterization 4, ISC-4
T2 - 4th International Conference on Site Characterization, ISC'4
Y2 - 18 September 2012 through 21 September 2012
ER -