Abstract:

The paper studies highway flooding in Southwest China,and 6 factors including developing conditions for geological disasters,geomorphological conditions,geological lithology,average annual rainfall,vegetation coverage and geologicaltectonic conditions along the highway have been selected to construct the Index System of hazards inducing environment zoning.The index weight were obtained through the combination of AHP and expert reliability,and the comprehensive index evaluation model for hazards developing environment was built.Supported by ArcGIS,comprehensive index for hazards developing environment in each grid was calculated by the analysis data of each index precisely obtained through 1 km×1 km grids,then hazards developing environment of highway flooding in Southwest China were devided into different zones according to county administrative districts.The results show that Southwest areas have sufficient environment conditions for highway flooding, the comprehensive index of hazards developing environment ranges from 3313 to7746,and the hazards inducing environment zones are mainly distributed in high easyhappening area and medium easyhappening area,among which high easyhappening area,medium easyhappening area and low easyhappening area acounts for 5718%,4039%,442% of the total area.This brings a heavy burden to highway management and operation