Research on Comprehensive Evaluation Method of Water Resources Security in Nanjing City

Aiming at the current situation of water resources utilization in Nanjing City,this paper establishes the index system for comprehensive evaluation on water resources security.The set pair analysis theory is introduced to set up the model for comprehensive evaluation on water resources security in Nanjing City.Analytic Hierarchy Process is adopted to determine the weight of each indicator.On that basis,the multivariate connection numbers of water resources security at different levels are calculated.Thus,the multi-objective problem is converted into single objective for evaluating water resources security in Nanjing City.The evaluation result on water security in Nanjing City turns to be criticality safety.