Evaluation and Prediction of Carrying Capacity of Water Resources and Environment in Xi'an City

Based on the connotation of carrying capacity of water resources and environment system, the index system of carrying capacity of water resources and environment in Xi 'an was constructed from four aspects of water resources, water environment,society and economy. The TOPSIS method and fuzzy comprehensive evaluation method were adopted to evaluate the carrying capacity of water resources and environment in Xi 'an from 2006 to 2020. Based on the evaluation results, GM(1,1) model was used to predict the change trend of carrying capacity of water resources and environment the next two years. The results showed that the carrying capacity of water resources and environment in Xi 'an fluctuated and rised, and the comprehensive scores of each subsystem all rised on the whole from 2006 to 2020. In the next two years, the carrying capacity of water resources and environment would increase year by year, and both of them have reached a high-quality level. The water environment and economic subsystem were green lights, and the social subsystem would rise to a green light in 2022, however the level of water resources subsystem was still worrying.