Geology and assessment of groundwater potential zones using GIS method in Lojing, Gua Musang, Kelantan

The groundwater resources are to support the water resources. Currently no continuous and active research is carried out to delineate this precious resource in the study area. In this case, an assessment was carried out to increase up the groundwater resources. So, as for this limited availability due to the improper strategic planning and mitigation of groundwater resources, Geographical information system (GIS) has become one of the main tools in the field of groundwater research which helps in assessing groundwater resources. A research entitled Geology and Assessment of Groundwater Potential Zones using GIS Method in Lojing, Gua Musang was conducted to find out the groundwater potential zone which covers area of 25km2. The aim of the research is to produce the geological map of the study area with scale 1: 25000, to identify parameters for potential zone of groundwater and to produce the groundwater potential zone map with scale 1:25000. The geological aspects involve the study of geomorphology, stratigraphy, structural geology, and historical geology of the study area. The geological characteristics were analysed through geological mapping method. The landforms of the study area are hilly and mountainous area with elevation 180m to 420m. There are four main lithologies in the study area which are granite, mudstone, quartzite and slate. The method used in generating the groundwater potential zone map is by using the Weighted Overlay Method (WOM). The parameters that trigger the groundwater potential zone were analysed and overlaid in order to generate the groundwater potential zone map. Digital Elevation Model (DEM) data were used to extract the parameters. The results were classified into 5 classes: very low, low, moderate, good and very good. Based on the zonation map, the study area is covered with a low groundwater potential zone probability to occur.