Study On Geological Hazard Risk Quantitative Zoning Of Fenyang City Based On GIS

In recent years,with the development of China's infrastructure and resource exploitation,the environmental destruction of human engineering activities has been increasing.The ensuing geological hazard such as landslide,collapse,mud-rock flow and surface subsidence have caused great harm to the human environment and the safety of life and property.The city of Fenyang located in the eastern foothills of Luliang Mountain.Due to special geological environmental conditions and strong human being's engineering activities,geological hazards are extremely developed.This paper relying on the "FenYang detailed investigation of geological hazard" project,on the basis of a comprehensive system of investigation and laboratory data comprehensive collated on,systematically analyzes the characteristics,distribution and harmfulness of geological hazard and Summarizes the formation conditions and influencing factors of geological disasters in Fenyang city.And then with the support of GIS technology,this paper uses the fuzzy synthesis judgment and the Logistic regression analysis model of two kinds of method to carry on the zoning evaluation of the geological hazards risk in Fenyang city,to aim to provide a more effective and scientific basis for hazards prevention and mitigation in fenyang city.Specific contents of this paper are as follows:(1)Through the collection of geological hazard data and statistical analysis of field survey data,deeply study the characteristics,distribution and harmfulness of geological hazard and Summarizes the formation conditions and influencing factors of geological disasters in Fenyang city.(2)Based on data on the detailed survey of geological hazards and DEM(Digital Elevation Model)establish the geological hazard evaluation factor system and quantify it.Established nine factors of density of geological hazard spots,density of geological hazard hazard area,slope height,slope style,slope,rock soil mass types,geological structure,human engineering activity and rainfall construct the evaluation system of geological hazard risk zonation.(3)In the assessment of geological hazard risk zoning,this paper based on GIS technology using the fuzzy synthesis judgment and Logistic regression analysis model of two kinds of method obtained two different evaluation results.By comparing and analyzing the results of the two zoning,the results are more accurate and closer to the actual situation as the basis for the evaluation of the geological hazard risk zoning of Fenyang City.(4)On the basis of the evaluation of geological hazard risk zoning,provide comprehensive,scientific and effective advice on the prevention and control of geological hazard of Fenyang City.