Investigation and Stability Analysis of a Mountainous Slope in Bo Kluea District, Nan Province

Abstract

Bo Kluea District in Nan Province, situated in the mountainous northern region of Thailand, features steep terrain that is highly susceptible to landslides triggered by prolonged heavy rainfall during the rainy season. This study involved conducting field surveys in the area to simulate the terrain with the objective of analysing landslide risks. The research utilised aerial surveying with unmanned aerial vehicles to capture topographic images and generate a digital elevation model. Furthermore, soil boring tests and laboratory analyses were carried out to determine the engineering properties of the soil. Electrical resistivity surveys were also conducted to evaluate the thickness and characteristics of the soil layers in the region. All collected data were analysed to assess slope stability. The study underscores the potential of integrating aerial survey technologies, field investigations, and spatial data analysis for evaluating slope stability and identifying areas prone to landslides. This approach improves both the accuracy and efficiency of managing high-risk areas. The findings from this research provide a framework for planning measures to mitigate landslide impacts and enhance the safety of communities in at-risk areas in a sustainable manner.