Set Pair Analysis-Variable Fuzzy Set Model for Evaluation of Regional Water Resources Shortage Risk

The risk rate,weakness,possibility of recovery,period for reoccurrence and risk level are defined as the indexes for evaluation of the water shortage risk of regional resources.A new model for evaluation of the water shortage is put forward in this paper based on the set pair analysis(SPA) and the variable fuzzy sets(VFS) theory.The suggested method is used to evaluate the water shortage risk of Zhanghe irrigation region in Hubei province in the current year,2010 and 2020.The result shows that the water shortage risk of Zhanghe irrigation region is at a low level.The prediction results are in line with the situation about the level of exploitation and utilization and shortage of water.This model is operative and practical and can be applied to evaluate water shortage.