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Seasonal-Spatial Distribution and Long-Term Variation of Transparency in Xin’anjiang Reservoir: Implications for Reservoir Management

Author

Listed:
  • Zhixu Wu

    (Chun’an Environmental Monitoring Station, Hangzhou 311700, China)

  • Yunlin Zhang

    (Taihu Laboratory for Lake Ecosystem Research, State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China)

  • Yongqiang Zhou

    (Taihu Laboratory for Lake Ecosystem Research, State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
    College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China)

  • Mingliang Liu

    (Institute of Environmental Protection Science, Hangzhou 310014, China)

  • Kun Shi

    (Taihu Laboratory for Lake Ecosystem Research, State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China)

  • Zuoming Yu

    (Institute of Environmental Protection Science, Hangzhou 310014, China)

Abstract

Water transparency is a useful indicator of water quality or productivity and is widely used to detect long-term changes in the water quality and eutrophication of lake ecosystems. Based on short-term spatial observations in the spring, summer, and winter and on long-term site-specific observation from 1988 to 2013, the spatial, seasonal, long-term variations, and the factors affecting transparency are presented for Xin’anjiang Reservoir (China). Spatially, transparency was high in the open water but low in the bays and the inflowing river mouths, reflecting the effect of river runoff. The seasonal effects were distinct, with lower values in the summer than in the winter, most likely due to river runoff and phytoplankton biomass increases. The transparency decreased significantly with a linear slope of 0.079 m/year, indicating a 2.05 m decrease and a marked decrease in water quality. A marked increase occurred in chlorophyll a (Chl a ) concentration, and a significant correlation was found between the transparency and Chl a concentration, indicating that phytoplankton biomass can partially explain the long-term trend of transparency in Xin’anjiang Reservoir. The river input and phytoplankton biomass increase were associated with soil erosion and nutrient loss in the catchment. Our study will support future management of water quality in Xin’anjiang Reservoir.

Suggested Citation

  • Zhixu Wu & Yunlin Zhang & Yongqiang Zhou & Mingliang Liu & Kun Shi & Zuoming Yu, 2015. "Seasonal-Spatial Distribution and Long-Term Variation of Transparency in Xin’anjiang Reservoir: Implications for Reservoir Management," IJERPH, MDPI, vol. 12(8), pages 1-16, August.
    • Handle: RePEc:gam:jijerp:v:12:y:2015:i:8:p:9492-9507:d:54120
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    References listed on IDEAS

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    1. Jan Karlsson & Pär Byström & Jenny Ask & Per Ask & Lennart Persson & Mats Jansson, 2009. "Light limitation of nutrient-poor lake ecosystems," Nature, Nature, vol. 460(7254), pages 506-509, July.
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    Cited by:

    1. Jian-Chao Shi & Ting-Lin Huang & Gang Wen & Fei Liu & Xiao-Peng Qiu & Bao-Shan Wang, 2016. "The Variation Characteristic of Sulfides and VOSc in a Source Water Reservoir and Its Control Using a Water-Lifting Aerator," IJERPH, MDPI, vol. 13(4), pages 1-13, April.

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