Evaluation of Ecological Vulnerability of County Areas in Karst Mountain Area Based on VSD Model-A Case Study of Duyun City

Abstract

This thesis can provide a more reasonable and accurate basis for county environmental management in karst regions, by evaluating the ecological vulnerability of Duyun area. The VSD model (Vulnerability Scoping Diagram) was used to construct a comprehensive evaluation of 29 indicators, including natural and human factors through exposure, sensitivity, and adaptability. The results showed that: According to the effects of ecological vulnerability, the environmental vulnerability of Duyun City is mainly mild.The slightly vulnerable area, the mildly vulnerable area, the moderately vulnerable area, the highly vulnerable area and the extremely vulnerable area account for 17.95%, 30.78%, 21.18%, 24.17% and 5.92%. The environmental environment of Duyun City is mainly mildly vulnerable, and the ecological situation in some areas is very delicate. High vulnerable areas and extreme vulnerable areas should actively carry out ecological protection construction, rationally urban layout development, and industrial building.Towns that are located in mildly and moderately vulnerable areas should rely on their abundant natural environment resources and location advantages to conduct moderate development, promote rural revitalization and development, and build ecologically livable cities.