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Landslides are one of the most common natural hazards in Malaysia, and besides geological conditions, rainfall intensity and duration are critical factors in assessing landslide risk. This study investigates the impact of daily rainfall variation on landslide susceptibility mapping and risk assessment. For this study, drainage, road, geological, and rainfall data were considered as key. The results show that rainfall significantly contributes to landslide risk increment by keeping geological and other triggering factors constant. Landslide vulnerability due to high-intensity rainfall was high on steep slopes causing high susceptibility compared to low-slope regions. The results also highlighted the relationship between triggering and geological factors in susceptibility assessment. Additionally, a comprehensive analysis through big data sets would help understand the spatio-temporal relationship between rainfall intensity and other landslide factors. Spatio-temporal data resolution will improve landslide susceptibility mapping and prediction accuracy to protect infrastructure and communities from potential landslide disasters in tropical climates.

The Gua Ikan Karst Complex (GIKC) is one of the geosite in the Stong Geopark. It consists of spectacular Middle Permian–Late Triassic Gua Musang Formation karst topography, represented by four (4) caves i.e., Gua Ikan, Gua Keris, Gua Pagar, and Gua Gelap. The GIKC can be potentially developed for nature-based tourism since it holds great geoheritage values. The aim of this research is to evaluate the current state of geotourism condition (qualitatively/quantitatively) and geoheritage features of the GIKC using two (2) values in the Modified Geosite Assessment Model (M- GAM) i.e., the Main Value (MV) and Additional Value (AV). The results indicate that the GIKC offers high Scientific/Educational Value (VSE); in the aspect of karst geomorphology (underground river caves, valley/wang, cave chambers, unique shape of stalactite/stalagmite/columns), lithology (metamorphosed limestone of the Gua Musang Formation and the Taku Shist), and palaeogeographic features (coral fossils, sea notch). In summary, the Total Main Value (∑MV) are Gua Ikan (9.73), Gua Keris (9.39), Gua Pagar (9.27) and Gua Gelap (8.66). The Total Additional Value (∑AV) are Gua Ikan (11.56), Gua Keris (11.25), Gua Pagar (11.04) and Gua Gelap (10.98). This paper’s findings reveal a comprehensive base for the improvement, planning, and management of the GIKC to become a geotourism end-point.

The current research project focuses on geological mapping and groundwater quality analysis of domestic wells in and around Kampung Panglima Bayu, in Tanah Merah district, Kelantan. The objective of this research is to produce an updated geological map of the study area at a scale of 1:25000 and to conduct groundwater quality analysis in the research region. Groundwater samples were obtained from 12 domestic wells for the analysis of physicochemical parameters. Temperature, pH, electrical conductivity, turbidity, and total dissolved solids were measured using a multiparameter and turbidity meter on site. Atomic Absorption Spectroscopy (AAS) was used to analyse major trace elements such as potassium, sodium, calcium, magnesium, iron, and manganese, while the titration method was used to analyse bicarbonate and chloride. While spectrophotometer methods were used to analyse fluoride, sulphate, and nitrate. Based on the data analysis of the geology of Kampung Panglima Bayu, three rock units can be found: granite is the most common kind of rock detected in the research region, followed by schist and alluvium. Furthermore, the geomorphology of the study area revealed elevation differences consisting of low land to high hills. The petrographic analysis revealed principle minerals like quartz, alkali feldspar, plagioclase and biotite with the granitic rocks identified as ‘biotite granite porphyry’ due to the high amount of biotite mineral present in the thin section. In addition, the results of our analysis for groundwater quality were compared to World Health Organization (WHO) and Ministry of Health Malaysia (MoHM) standards values. It was observed that 7 of the 12 wells were contaminated because the pH values were below the normal level. Turbidity was high in wells 4, 5, and 11, and sodium ion levels surpassed the standard allowable limit in well 11.