GIS method based risk evaluation for landslide hazard in Mian County,Shaanxi Province

摘要

Due to a variety of factors, geological disasters occurred frequently in recent years, giving people a huge loss of life, had cause for concern.Shaanxi is the southern region of geological disasters are more serious, especially landslide hazards.This study chooses Mian County, Shaanxi Province as the study area.Mian County landslide disasters are analyzed the types, distribution, development regularities and geological environmental conditions and main influencing factors of the formation conditions of landslide disaster.To use GIS, fuzzy comprehensive evaluation to evaluate the model, and the Analytic Hierarchy Process.To select engineering geological lithologic, ground motion peak acceleration, geological structure, elevation, geomorphological types, slope, annual rainfall, human engineering activities and land use type as the main evaluation factors for landslide hazard risk assessment.Landslide hazard risk is divided into a high risk, moderate risk, low risk and extreme low risk levels.