| Shehong county is located in the central sichuan basin upper hilly north rim siltstones,high terrain north south low,belong to the low hilly land,geological structure is relatively simple in the area,siltstones abundant water resources,human engineering activities in the area,artificially induced disasters phenomenon is obvious.Relying on the shehong county geological disaster in sichuan in 2016,this paper has a detailed survey projects,on the basis of field geological investigation,study the shehong county geological environmental conditions and the development of disaster situation,summarized the development rule of the geological disasters detailed analyzed the disaster cause features and application based on ArcGIS information rights model of shehong county geological disaster risk zoning,this paper get the following research.1.Analyzed the geological environmental conditions and the relationship between the geological disaster causes of Shehong,finding out the landform,stratum lithology,geological structure,drainage,rainfall and human engineering to the influence of geological disasters.2.According to the formation of geological hazard on the factors affecting the most select 7 evaluation indexes,application principle and information analysis hierarchy process model of information superiority in ArcGIS platform completed shehong county geological disaster risk zoning,it is divided into high,middle,low and non-danger zone.3.By comparing risk zoning maps with disasters layer overlay can be seen,this article partitions high point fit with existing hazard,high risk areas are mainly concentrated in the fu river and along the main road on both sides,the objectivity of evaluation results is high,the disaster prevention and control has a certain significance for guiding the reality. |
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