Integrated Geotechnical Investigation And Slope Stability Assessment In Riyad, Saudi Arabia: Implications For Geography, Planning, And Development

Abstract This research presents an integrated geotechnical investigation and slope stability assessment in the Riyad region of Saudi Arabia, a semi-arid area undergoing rapid urban development. The study combines field data, laboratory testing, and advanced geotechnical modeling to evaluate the mechanical behavior of local soils and their susceptibility to slope failure. Topographic and geological maps were analyzed alongside spatial data to identify critical zones, while numerical simulations produced safety factor curves under varying slope angles and soil parameters. Historical records of slope instability events were examined and statistically correlated with precipitation patterns, land use, and geological structures. Geographic Information Systems (GIS) were used to visualize hazard-prone areas, providing a clear geospatial context for decision-makers and engineers. The findings reveal key zones of vulnerability that require urgent mitigation efforts, such as slope reinforcement and improved drainage systems. This multidisciplinary approach, which integrates geotechnical analysis, statistical evaluation, and visual mapping, offers a comprehensive framework for managing slope stability risks in arid urban environments like Riyad.