Risk Assessment of Geological Disasters in Shaoshan City Based on the AHP-Information Quantity Model

Geological disaster risk assessment serves as the foundation and support for risk management and control, playing a critical role in the scientific prevention and mitigation of geological disasters. Taking Shaoshan City, Hunan Province, as the study area, this research selected five primary indicators (e.g., topography) and twelve secondary indicators (e.g., elevation difference) to evaluate disaster susceptibility. Additionally, rainfall intensity and slope-cutting intensity were used as dual inducing factors for hazard assessment. Combined with the vulnerability of disaster-bearing bodies, the study delineated high-, medium-, and low-risk zones for geological disasters. The results indicate that the high-risk zone covers 12.91 km² (5.23% of the total area), the medium-risk zone spans 47.74 km² (19.33%), and the low-risk zone occupies 186.37 km² (75.44%). The research findings can be effectively applied to local disaster prevention and mitigation efforts, and provide a valuable reference framework for risk assessment of geological hazards in a given region.