Journal of East China Normal University(Natural Science) ›› 2021, Vol. 2021 ›› Issue (4): 64-71.doi: 10.3969/j.issn.1000-5641.2021.04.008

• Water Pollution Control and Treatment • Previous Articles     Next Articles

Investigation of the environmental status of water at the Dalian Lake demonstration area in the Jinze water source area of Taipu River

Yang ZHA1,2,3,4, Difang WANG1,2,4, Chengjin CAO1,2,3,4,*(), Minsheng HUANG1,2,3,4, Xing WANG5, Bowen YU1,2,3,4, Chang LIU1,2,3,4, Haochen DU1,2,3,4, Mengzhuo LI1,2,3,4   

  1. 1. Shanghai Key Laboratory for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai　200241, China
    2. Institute of Eco-Chongming, Shanghai　202162, China
    3. Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, Shanghai　200241, China
    4. Technology Innovation Center for Land Spatial Eco-Restoration in Metropolitan Area (Ministry of Natural Resources), Shanghai　200062, China
    5. Chinese Research Academy of Environmental Sciences, Beijing　100012, China
  • Received:2021-02-01 Online:2021-07-25 Published:2021-07-23
  • Contact: Chengjin CAO E-mail:cjcao@des.ecnu.edu.cn

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Abstract:

In this paper, we use hydrology and water quality survey data around Dalian Lake to assess the environmental status of the water and surface runoff pollution in the Dalian Lake demonstration area. The results show that the water quality of the Jinze water source can largely satisfy class Ⅲ standards for surface water; however, given seasonal differences for some indicators, the water quality of the Jinze water source fails to meet the standard on a consistent basis. The water body surrounding the Dalian Lake demonstration area is predominantly slow flow (flow rate: 0 - 0.03 m/s), with low transparency and neutral or slightly alkaline water (pH = 6.63 - 9.67); these conditions render the area susceptible to forming water bloom. Pollution from nitrogen and phosphorus nutrients at each sampling point was significant, and seasonal differences were noticeable; the water quality in spring and summer is generally better (class Ⅱ—Ⅲ), and some water bodies meet class Ⅴ standards in autumn and winter. The concentration of rainwater runoff in the Dalian Lake demonstration area has a noticeable initial effect. The average concentration of nitrogen and phosphorus in the underlying water is higher than the class Ⅴ standard for surface water, and the pollution is likewise more significant.

Key words: Taihu Lake Basin, Jinze reservoir, drinking water source, water environmental pollution, non-point source pollution

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