Study on Integrate Evaluation Method of Sustainable Utilization of Regional Water Resources in Nanjing City

Based on the basic theory of sustainable development as well as present utilization situation of water resources in Nanjing,the paper analyzes a number of key indexes affecting the sustainable utilization of Nanjing water resources and divides these indexs into different levels.According to the contribution of each index to the system,the weight of each index is determined by applying the three-demarcation method,which defines the degree of influence for each index on the object.Comprehensive fuzzy evaluation model is established for evaluating the degree of sustainable development of water resources in Nanjing,and the result turns out to be average degree.