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

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

Nazrin Rahman^1,*, 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

ISSN
0126–5539; e-ISSN 2682-7549