Warta Geologi, Vol. 46, No. 3, December 2020, pp. 220–224


Warta Geologi, Vol. 46, No. 3, December 2020, pp. 220–224

Groundwater potential assessment using 2-D resistivity method in Kluang, Johor (Malaysia)

Nazrin Rahman1,*, Edy Tonnizam Mohamad2, Rosli Saad1
1 Geophysics Section, School of Physics, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia
2 Centre of Tropical Geoengineering (GEOTROPIK), Universiti Teknologi Malaysia, 81310 Johor Bahru, Malaysia
* Corresponding author email address: nazrinrahman94@gmail.com

Abstract: Sources of clean water are decreasing due to rapid usage, contaminated surface waters, pollution and dry season. The dependence on the existing water source is not enough to fulfil the increasing demand of population in Malaysia. In order to overcome the problem, groundwater source is the most suitable alternative. 2-D resistivity method was carried out in a granitic area of Kluang, Johor to delineate and locate groundwater resource. 5 survey lines were conducted by using ABEM SAS4000 terrameter and electrode selector which were connected to 41 electrodes through lund cables. Pole-dipole array was chosen in this study for deeper penetration. Collected data were processed by using RES2DINV software to produce inversion model which was then exported to Surfer8 software for visualisation and interpretation. The result shows that most of the study area consist of granite with different level of fracturing. Unconfined aquifer was found at depths of 0 to 50 m. Confined aquifers can be seen at two different zones. They exhibit same properties at three parallel lines, R1-R3 and show continuity between them. It is predicted that the aquifers flow in the southwest to northeast direction. The hard rock aquifers are highly recommended to be drilled as they contain a large amount of fresh water for further usage.

Keywords: Groundwater, 2-D resistivity, granite, confined aquifer

DOI : https://doi.org/10.7186/wg463202009