Investigation and Evaluation of Water Quality of the East Lake, Wuhan

摘要

The East Lake of Wuhan, as a famous scenic area, has been seriously polluted with the influences of human activity. This paper sets up 7 monitoring points (D1～D7) along the East Lake according to the characteristics of point and non-point source pollution, to investigate and evaluate the current situation of water quality on the basis of fuzzy evaluation method. In which, the evaluation factors used for calculation of weight factors are different for lake water collected from different monitoring points. Results showed that the water quality of D3 is at Grade I and that of the other 6 monitoring points are all worse than Grade V. It was deduced that the D3 water was purified by aquatic plant of water lilies, while D1, D2, D4～D7 water were seriously polluted by the wastewater from household, hotels and restaurants, which was without any treatments and discharged into the East Lake directly. In addition, the pollutants from running vehicles on the bank of East Lake possibly went into this lake in the rain or snow weather and brought the lake water pollution. Therefore, some measures of controlling the direct discharge of wastewater from pollution sources, planting aquatic plants in the lake area and separating the lake from roads by a parkway, should be taken to protect the East Lake water environment and improve its water quality.