Fuzzy Comprehensive Evaluation of Water Security in Central Water Source Area of Middle Route of South-to-North Water Diversion Project

The central water source area of the Middle Route of the South-to-North Water Diversion Project is mainly located in Shiyan City of Hubei Province,and the water quality of this area basically meets the water transfer requirements.However,the water security problems,such as the soil and water loss,water pollution,immigration allocation,and the poverty and backwardness,can affect the quality of water transfer,the water resources allocation,and the sustainable development of society,economy and ecological environment.Therefore,the evaluation of water security in the water source area is urgent.Due to the complexity and fussiness of the meaning and evaluation of water security,a multi-layer fuzzy comprehensive evaluation method,which is based on the selection of 20 representative indexes and the development of the index system,is used to provide a quantitative assessment of the water security in the central water source area of Shiyan City located in the Middle Route of the South-to-North Water Diversion Project.The results show that the water security of the water source area has been in a critical state of basic safety since the implementation of the Middle Route of the South-to-North Water Diversion Project,which is consistent with the results obtained from the principal component analysis.Therefore,the method is feasible and it can provide a reliable conclusion.