Geological Hazard Susceptibility Evaluation Along Pipelines Based on GIS and Integrated Index Model

The development of geological hazards along the pipeline is a major threat to pipeline safety. This paper takes the area where the natural gas pipeline from Jinhua to Lishui of Zhejiang Province passes through as the research object. The characteristics of geological hazard development and spatial distribution were considered, and a geological hazard susceptibility evaluation index system was constructed. The weight of each index is calculated by the analytic hierarchy process, and each index is graded and assigned. Then, the susceptibility index of each evaluation unit in the study area is calculated using the comprehensive index model, and the susceptibility is graded using the natural breakpoint method. Finally, the geological disaster susceptibility zoning map is made on ArcGIS PRO. The results show that the low, lower, medium, higher and high susceptibility zones accounted for 7.2%, 46.1%, 35.4%, 10.7% and 0.6% of the total study area, respectively. The evaluation results basically match the distribution of historical geological hazards and accurately reflect the characteristics of geological hazard development in the study area, which can provide an important reference for the protection of geological hazards in the area along the pipeline.