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Trends and Causes of Raw Water Quality Indicators in the Five Most Famous Lakes of Jiangsu Province, China

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  • Yajun Chang

    (Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Nanjing 210014, China
    Jiangsu Engineering Research Center of Aquatic Plant Resources and Water Environment Remediation, Nanjing 210014, China)

  • Zheyuan Feng

    (School of Rail Transportation, Soochow University, Suzhou 215131, China)

  • Jixiang Liu

    (Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Nanjing 210014, China
    Jiangsu Engineering Research Center of Aquatic Plant Resources and Water Environment Remediation, Nanjing 210014, China)

  • Junfang Sun

    (Dongwu Business School, Soochow University, Suzhou 215021, China)

  • Linhe Sun

    (Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Nanjing 210014, China
    Jiangsu Engineering Research Center of Aquatic Plant Resources and Water Environment Remediation, Nanjing 210014, China)

  • Qiang Tang

    (School of Rail Transportation, Soochow University, Suzhou 215131, China)

  • Dongrui Yao

    (Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Nanjing 210014, China
    Jiangsu Engineering Research Center of Aquatic Plant Resources and Water Environment Remediation, Nanjing 210014, China)

Abstract

Due to pollutants from industrial and agricultural activities, the lakes in China are faced with ecological and environmental problems. The five most famous lakes of Jiangsu Province, Taihu Lake, Gehu Lake, Gaobaoshaobo Lake, Hongze Lake, and Luoma Lake, have long-term fixed monitoring points for water body-related indicators. Over a five-year period, the monitoring showed that Gehu Lake had the highest average total nitrogen (TN) and total phosphorus (TP) concentrations among all lakes which were close to the Grade V critical value of the China’s Environmental Quality Standards for Surface Water (CEQSW). The NH 3 -N concentrations in all lakes were Grade IV according to the China’s Water Quality Standard for Drinking Water Sources (CWQSDWS) and Grade II according to the CEQSW. In addition, although TP concentrations in Taihu Lake did not exceed Grade V in the CEQSW, TP removal was the main factor controlling eutrophication. It was also found that the petroleum concentrations in all lakes were lower than the Grade I according to the CEQSW. Despite this relatively low petroleum pollution, the concentration of petroleum was negatively correlated with the phytoplankton densities in all lakes. This indicated that phytoplankton density was very sensitive to petroleum concentration. For heavy metals, the concentrations of Pb, Cu, As, and Cd in all lakes were significantly lower than Grade I (CEQSW) from 2013 to 2017. However, the accumulated heavy metals in sediments will remain an important pollution source affecting water quality and aquatic products in the future. The comprehensive pollution index analysis showed that the five lakes were often moderately polluted, indicating that the protection of lake resources in China should not be relaxed for a long time in the future.

Suggested Citation

  • Yajun Chang & Zheyuan Feng & Jixiang Liu & Junfang Sun & Linhe Sun & Qiang Tang & Dongrui Yao, 2022. "Trends and Causes of Raw Water Quality Indicators in the Five Most Famous Lakes of Jiangsu Province, China," IJERPH, MDPI, vol. 19(3), pages 1-16, January.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:3:p:1580-:d:738578
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    References listed on IDEAS

    as
    1. Yulin Wang & Liang Wang & Jilin Cheng & Chengda He & Haomiao Cheng, 2019. "Recognizing Crucial Aquatic Factors Influencing Greenhouse Gas Emissions in the Eutrophication Zone of Taihu Lake, China," Sustainability, MDPI, vol. 11(19), pages 1-13, September.
    2. Mueller, Hannah & Hamilton, David P. & Doole, Graeme J., 2016. "Evaluating services and damage costs of degradation of a major lake ecosystem," Ecosystem Services, Elsevier, vol. 22(PB), pages 370-380.
    3. Linhe Sun & Huijun Zhao & Jixiang Liu & Bei Li & Yajun Chang & Dongrui Yao, 2021. "A New Green Model for the Bioremediation and Resource Utilization of Livestock Wastewater," IJERPH, MDPI, vol. 18(16), pages 1-13, August.
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