Regional Geological Disaster Survey And Evaluation Research Based On GIS

The problem of geological disaster has increasingly prominent,which cause serious damage to people's production and life,bring serious influence people's life and property safety.The paper will use GIS technology to carry out the regional geological disaster survey and evaluation,which is great significance of regional geological disaster prevention.Based on the county of AnFu as the study area,through a comprehensive investigation of AnFu's geological disaster situation,and on the basis of the statistical analysis of the field survey data,summarizes the development regularities of various geological disasters occurred in the study area,Combined with GIS technology and analytic hierarchy process(AHP)model,the analysis of regional geological hazards risk zoning,explore the application of GIS technology to carry out the regional geological disaster survey and evaluation research the technical route and method system,made the following main results::(1)Find out the Anfu county regional geological disaster situation,the space and time characteristics and development regularities.(2)This paper has selected the terrain slope,stratum lithology,geological structure,rainfall,rivers,human activities,scale and distribution density of geological disasters such as the eight factor analyses the evaluation of risk zoning,through building the appraisal model of AHP mathematical,get in each assessment unit risk index value,Based on the platform of GIS,the study area is divided into three grades of danger:high—risk area(84.5%),in the danger area(12.4%),low-risk area(3.1%).(3)Divided the research area of geological disasters prevention and control of partition,In terms of the collision avoidance,engineering measures,monitoring measurement put forward the corresponding geological disaster prevention and control countermeasures(4)By the management and spatial analysis functions of GIS,geological disaster information database is established,for the analysis of geological disaster monitoring and prevention programmes in the study area provides the basic data,theoretical and scientific basis.Practical application and analysis show that the GIS technology combined with hierarchical analysis model for regional geological disaster survey and evaluation effect is good,evaluation result is practical and scientific,can provide service for AnFu's geological disaster prevention,and promote the development of regional economy and social stability.