Ecological Risk Assessment of Debris Flow Disaster in Yanbian Region, China

The frequent occurrence of debris flow disasters in Yanbian region poses a great threat to the safety of local people’s lives and property as well as the ecosystem. This paper studies the ecological risk assessment of debris flow in Yanbian region from three dimensions of hazard, vulnerability and ecological loss. Nine influencing factors were selected to construct the hazard assessment index of debris flow, and the hazard was analyzed by using BP neural network model and information quantity method. The ecosystem was divided into forest, paddy field, dry land, grassland, water area, residential area and other 7 kinds, and the landscape pattern indices were selected to evaluate the ecological vulnerability. Net primary productivity (NPP), soil conservation services (SCS) and biodiversity were selected to build the potential ecological loss model in Yanbian region. The results show that the high ecological risk areas in Yanbian are mainly distributed in the middle of Dunhua City, the middle of Antu City, the south and north of Wangqing City, the south of Hunchun City, the north of Helong city and the north of Longjing City.