ISSUES AND CHALLENGES IN INTERPRETING 2D RESISTIVITY IMAGE

The ability of geophysical technique in mapping the subsurface
bedrock has long been
recognized in the engineering field. In most cases the seismic
refraction investigating method
were used. This technique has proven itself to be very effectiv
e in area where the subsurface
interface is relatively simple such as the granite bedrock over
lain by the weathered layer. In
area where the interface is complicated such as in karst topogr
aphy, a more complicated
survey technique is needed.