INTRODUCTION
Electrical resistivity method was developed in the early 1900’s and has become much widely used since the 1970’s due to the availability of computer to process and analyze its data. These techniques are used extensively in searching for suitable groundwater and also monitor types of groundwater pollution. Resistivity is a fundamental and diagnostic physical property that can be determined by a wide variety of techniques under electrical surveying. Some make use of naturally occurring fields within the ground while others require the introduction of artificially generated current into the ground. Any subsurface variation in conductivity changes the flow of current within the ground and thus affects the distribution of electrical potential (Zohdy et al., 1974; Ojo et al., 1990; Olorunfemi and Okhue, 1992).
