The Fuzzy Comprehensive Evaluation of Water Quality Based on Weighted Modified in Beijing Garden Show Park

In recent years, due to the speeding up of urbanization, the water quality of Yongding river in Beijing is deteriorating. The Garden Show Park was built beside the Yongding river. In this paper, we have made scientific and reasonable evaluation on the water environment of the park, tracking its ecological effect in real time, to provide certain reference for the corresponding improvement measures. Firstly, we collected some water samples in the river, conducted an experiment later, and then we used the improved special operation to calculate the fuzzy result, which is based on the principle of fuzzy comprehensive evaluation. At the same time, we increase the evaluation section, and balance the evaluation results of every section, it is concluded that the water quality level is: the third level (light pollution), and it provides referential basis for the ecological restoration of the river.