General geology and prediction of limestone geohazard by using electrical resistivity imaging (eri) at Kampung Lepan Jaya, Gua Musang, Kelantan

Electrical Resistivity Imaging (ERI) survey is a geophysical technique that rapidly produces high-resolution profiles of the subsurface under the most field condition using measurements of the ground’s resistance to an electrical current to develop a two-dimensional model of the subsurface. The objective of this study are to produce geological map of Kampung Lepan Jaya, to study the limestone subsurface condition using ERI survey and to find the probability of limestone geohazards in the study area. The study area is located at Kampung Lepan Jaya, Gua Musang Kelantan with the latitudes 04° 48′ 30″ N - 4o 45’ 50” N and longitudes 101o 59’ 0” E - 102° 01′ 40″ E for a total area of 25 km2. The probability of limestone geohazard is figured out by using ABEM Terrameter S4000 and RES2DINV software. The result shows that, from four survey line, one of the Resistivity Survey Image has high probability of sinkhole while the other three has stable and strong rock formation in the subsurface with very low probability for sinkhole. Overall analysis shows Kampung Lepan Jaya is a stable area and has low probability of sinkhole occuring.