Bulletin of the Geological Society of Malaysia, Volume 43, Dec. 1999, pp. 197 – 203
School of Physics, Universiti Sains Malaysia, 11800 Penang, Malaysia
Abstract: Geoelectrical imaging surveys are becoming increasingly important exploration tools in various shallow geotechnical and environmental investigations. The wide range of resistivity variations between the anomaly and the host has made it an attractive physical parameter for subsurface exploration. New field concepts and techniques have been developed for situations where an understanding of subsurface conditions in detail is required. The Multi-scale survey technique has greatly enhanced the horizontal coverage and the resolution of the array used. Moreover it has partially suppressed the effect of electrical noise on the field measurements as well as strengthened the voltage signal to noise ratio of the Wenner-Schlumberger array by using multiple dipole lengths. Interpretation of the resulting resistivity cross-section has enabled the clear identification of the subsurface features.