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ZHA Yang, WANG Difang, CAO Chengjin, HUANG Minsheng, WANG Xing, YU Bowen, LIU Chang, DU Haochen, LI Mengzhuo. Investigation of the environmental status of water at the Dalian Lake demonstration area in the Jinze water source area of Taipu River[J]. Journal of East China Normal University (Natural Sciences), 2021, (4): 64-71. doi: 10.3969/j.issn.1000-5641.2021.04.008
Citation: ZHA Yang, WANG Difang, CAO Chengjin, HUANG Minsheng, WANG Xing, YU Bowen, LIU Chang, DU Haochen, LI Mengzhuo. Investigation of the environmental status of water at the Dalian Lake demonstration area in the Jinze water source area of Taipu River[J]. Journal of East China Normal University (Natural Sciences), 2021, (4): 64-71. doi: 10.3969/j.issn.1000-5641.2021.04.008

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

doi: 10.3969/j.issn.1000-5641.2021.04.008
  • Received Date: 2021-02-01
  • Publish Date: 2021-07-25
  • 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.
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