Evaluation on effect for the prevention and control against the landslide disasters in the three gorges reservoir area

Abstract

This paper takes the landslide disasters in Three Gorges Reservoir Region as object of study, and then summarizes and analyzes totally 72 control engineering projects that used for the disasters. It sums up the characteristics of prevention technology for landslide disasters in the area. Based on the analysis of the fundamental type and hazard prevention features for the Three Gorges Reservoir Area Landslide Hazard Prevention Project, it has identified the prevention and control efficiency evaluation index, and established the evaluation index system involving up to 11 impact factors and the corresponding prevention and control efficiency grading standards. The landslide hazard prevention and control efficiency evaluation model based on an integrated fuzzy hierarchy process theory was utilized to perform prevention and control efficiency evaluation on the typical project cases, and the evaluation results was excellent in consistent with the judgment result of field geological survey.