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Risk Evaluation of the Geological Hazards of Sichuan-east Gas Pipeline Based on Fuzzy Logic Method and GIS

CAO Li;DENG Qing-lu;GENG Dan;WAN Fei;TAN Jian;Engineering Faculty,China University of Geosciences;Institute of Geophysics and Geomatics,China University of GeoSciences;Jiangsu,Zhejiang and Shanghai West-east Gas Pipeline Management Office of China National Petroleum Corporation;  
Sichuan-east gas pipeline(Sichuan-Chongqing section)passes through mountains where the terrain is complex,the topography is diverse and geological hazards take place frequently.For the purpose of warning and forecasting the geological hazards along the pipeline,this paper takes landslides in the study area as an example,applies fuzzy logic method based on ArcGIS to modeling and calculates landslide probability values with different gamma values.Then the paper calculates the posterior probability values when gamma is 0.9and reclassifies the posterior probability values.Finally,the paper obtains the zoing map of landslide risk evaluation for the study area with high,medium and low risk levels.The research could provide decision support for the safety operation of Sichuan-east gas pipeline.
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