Water ecological security assessment of Taiyuan urban district in Shanxi Province

With the development of economy and the growth of population, water ecological environment of Fen River in the section of Taiyuan urban district has been severely polluted. Based on the general concept of ecological security and the pressure-state-response conceptual model, this paper constructed a water ecological security assessment system consisting of eighteen assessment indicators, set the classification standard of each assessment indicator, and determined their weights. Besides, by using this system and the analytic hierarchy process, we quantitatively assessed the water ecological security in Taiyuan. Our results showed that the water ecosystem is in a lower security level in 2010, and after a series of measures, such as ecological environment management and integrated water resources protection are performed, the water ecosystem would gradually recover to the security level in 2015, 2020 and 2030, but still fails to reach the ideal level. This research may contribute to the macro control over urban water ecological construction and the environment improvement in Taiyuan urban district.