Groundwater Potential Using Electrical Resistivity Imaging In Batu Melintang, Jeli, Kelantan

Abstract

The study is carried out in the northern Kelantan region, specifically at Batu Melintang, Jeli, across a distance of around 20 km2. The study's main aim is to analyze groundwater potential that can be used for future mining or agricultural propose. Batu Melintang's lithology consists of slate, phyllite, schist, hornfels, metasiltstone and metasandstone with granitic intrusions. Sungai Pergau and Sungai Tadoh are the major rivers in the area fed by tributary drainages located in the gold mining zones. It is crucial to assess the groundwater potential for future usage as any disruption of the watershed drainage system, could interfere with the primary surface river system which will eventually hinder the importance of Batu Melintang as a gaining popularity geotourism site. This research is conducted by using geological mapping and resistivity surveys. Four survey lines of 200 m are conducted within the study area using the Wenner configuration. Resistivity data is processed using Res2Dinv software and result with RMS error lower than 20% were produced. Both pseudosection of lines L1 and L2 show the occurrence of fresh groundwater (1-100ohm.m) at a depth of 5 meters and below the surface. It also shows the activity of normal faulting that might produce the aquifer. In the cases of LS3 and LS4, potential groundwater found in the continuous low angle aquifer located deeper around 10m to 30m might also be produced by the activity of the thrust fault. The study also found that the best groundwater potential occurred in the zone within the fractured bedrock of metamorphic rock.