“…In the past decade Electrical sounding and Resistivity tomography (VES & ERT) have evolved, potential geophysical technologies to monitor the natural changes in shallow sub-surface resistivity (Binley et al, 2002;Dutta et al, 2006, Arora & Ahmed, 2010Loke et al, 2014;Singha et al, 2014). ERT can be applied to define the water table (Zaidi, 2012), to delineate aquifers (Dutta et al, 2006), to search for karst geological structures (Leuccim, 2005) and find karst water (Metwaly et al, 2012;Vlahović & Munda, 2011;Gan et al, 2013) and also to study the unsaturated zone (Arora, 2013;Carriere et al, 2013).…”