Geological Hazard Distribution And Risk Assessment In Gao Tan Zi Yang Qin Ba Area

With the rapid development of China's economy,the urbanization of the continuous advancement,population and building density growing,infrastructure and major projects continue to build,geological hazard risk is gradually increasing.Qinling area geological environment and natural ecological environment fragile,coupled with extreme weather conditions in recent years and unreasonable human engineering activities,frequent geological disasters,threatening the people's lives and property.Geological disaster risk assessment is the basis for scientific planning,deployment and implementation of geological disaster prevention and control,to provide the basis for disaster prevention and mitigation projects.The artical Takes Qinba Mountains Ziyang County Gaotan town as the study area,relying on China Geological Survey Bureau,"the survey of Geological Hazards in Longnan-Qinba Mountain Area".Based on the detailed investigation of the geological disasters and the GIS in Gaotan,this artical systematically studies the geological environment background,the geological disaster development condition,the distribution law and the influencing factors,the geological disaster formation condition analysis,on the basis of the comprehensive evaluation of the advantages and disadvantages of each evaluation method,The mathematical statistics combined with the quantitative model of the method,the study area of geological disasters prone to risk and risk assessment and zoning,the results achieved are as follows:1.Explore the development characteristics of geological disasters in the Gaotan town,forming conditions,distribution.Study the development characteristics of landslide and collapse disaster by mathematical statistics and GIS.Based on the study of the formation conditions of the disaster topography,stratigraphic lithology,geological structure,slope structure and influencing factors,summary the characteristics and distribution of geological disasters in Gaotan Town.2.Through the study of the slope structure and failure mechanics of the geological disaster,put forward the failure mechanism of the landslide and collapse.3.This artical analyzes the advantages and disadvantages of the geological disaster zoning method and combines the characteristics of geological disasters and the degree of research in the study area.The information quantity model and the binary logistic regression method are used to evaluate the susceptibility and risk of geological disasters.And ROC curves were used to verify the model reliability.Through the qualitative analysis and quantitative calculation,the vulnerability of the disaster-bearing area in the study area was evaluated,and the risk of the Gaotan town was determined by combining the danger and the vulnerability.The risk of disaster prevention and mitigation work has important practical value in Gaotan town.