4:45 PM - 5:00 PM
[HDS07-24] Evaluation of Landslide Hazard Susceptibility in Ampang Jaya, Malaysia: Geological and Anthropogenic Influences
Keywords:landslide susceptibility, disaster risk reduction, slope failure, GIS , tropical climate
Over the past decade, Ampang Jaya, Selangor, Malaysia has experienced a series of tragic landslides resulting in significant casualties due to the impacts of climate change and urbanisation. This study investigates the geological factors influencing landslide hazard susceptibility in the region, with the objective of preventing future incidents and enhancing the livelihoods of local residents. A comprehensive assessment of high-risk slopes was conducted using a slope strength database, alongside the collection and laboratory testing of rock and soil samples to evaluate their physical and mechanical properties. Geographic Information System (GIS) analysis was employed to identify contributing factors to landslide susceptibility, revealing that urban zones under Kuala Lumpur Granite are particularly at risk. The findings indicate that organic silty soils with low plasticity, resulting in diminished shear strength, are highly susceptible to landslides. Additionally, steep slopes exhibiting convex and concave curvatures were identified as zones of high susceptibility due to increased shear stress, as well as soil saturation and erosion. The study highlights the exacerbating role of anthropogenic activities, such as urbanization, deforestation, and infrastructure development, which alter land use and increase surface runoff, thereby heightening landslide hazards. The results of this research can inform the development of more effective landslide mitigation strategies tailored for the region.