ABSTRACT
The capabilities of Geographic Information Systems (GIS) range from conventional data storage to complex spatial analysis and graphical presentation. Commonly, GIS uses raster data for the storage, processing, display and analysis of spatial data. A rainfall-induced shallow landslide is a major hazard in mountainous terrain. It can be forecasted in real-time by modeling the relationship between rainfall infiltration and decrease of slope stability. Shallow landslides are frequently observed in mountainous countries after intensive rainfall, resulting in the loss of life and costly damage to the environment. Any landslide hazard estimation system that is commonly used for hazard assessment should give answers to three key questions: the magnitude, the location and the time of occurrence. The causal factors of a given landslide can be summarized as falling into two categories: quasi-static variables and dynamic variables. The quasi-static variables, such as geology, slope gradient, elevation, and geotechnical properties, contribute to landslide susceptibility and determine the location and the magnitude of the failure.
