Study on vulnerability assessment of Xiaoxiang water source in Qujing

Abstract

Most of the urban water sources in Yunnan Plateau Basin, which are mainly reservoir type, are located in Karst mountainous area, with low eco-environmental capacity, high sensitivity and strong vulnerability. However, the vulnerability assessment of water source area is the basis of scientific protection and ecological restoration measures of urban water source area in plateau basin. Based on the study of vulnerability, started from the point of view of the vulnerability of urban water sources in Yunnan plateau basin, and combined with the concept and connotation of urban water source vulnerability in plateau basin, this paper constructs an evaluation index system that reflects the vulnerability of urban water sources in the plateau basin. In this paper, the fuzzy comprehensive evaluation model of urban water source vulnerability in plateau basin is constructed by using the method of fuzzy mathematics, and an example is given to evaluate the vulnerability of Xiaoxiang urban water source in Qujing. The evaluation results show, then combined with the principle of maximum membership degree, it is concluded that the vulnerability comprehensive evaluation vector of Xiaoxiang water source area is (0.125, 0.087, 0.414, 0.359, 0.019), the Xiaoxiang water source area in Qujing is moderately fragile. Among them, hydrometeorological factors and eco-environmental factors are in a state of moderate vulnerability, water pollution factors are in a high vulnerability state, and surface disturbance factors are in a state of non-vulnerability.