Mapping mountain torrent hazards in the Hexi Corridor using an evidential reasoning approach

[摘要] The Hexi Corridor is an important part of the Silk Road Economic Belt and a crucial channel for westward development in China. Many important national engineering projects pass through the corridor, such as highways, railways, and the West-to-East Gas Pipeline. The frequent torrent disasters greatly impact the security of infrastructure and human safety. In this study, an evidential reasoning approach based on Dempster-Shafer theory is proposed for mapping mountain torrent hazards in the Hexi Corridor. A torrent hazard map for the Hexi Corridor was generated by integrating the driving factors of mountain torrent disasters including precipitation, terrain, flow concentration processes, and the vegetation fraction. The results show that the capability of the proposed method is satisfactory. The torrent hazard map shows that there is high potential torrent hazard in the central and southeastern Hexi Corridor. The results are useful for engineering planning support and resource protection in the Hexi Corridor. Further efforts are discussed for improving torrent hazard mapping and prediction.

[发布机构] Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou; 730000, China^1;University of Chinese Academy of Sciences, Beijing; 100049, China^2;Geologic Hazards Prevention Institute, Gansu Academy of Sciences, Lanzhou; 730000, China^3;College of Resources and Environment, Gansu Agricultural University, Lanzhou; 730070, China^4

[效力级别] 政治学

[关键词] Dempster-Shafer theory;Driving factors;Engineering planning;Engineering project;Evidential reasoning approaches;Hazard mapping;Resource protection;Vegetation fractions