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Spatio-Temporal Variation in Nutrient Profiles and Exchange Fluxes at the Sediment-Water Interface in Yuqiao Reservoir, China

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  • Shuailong Wen

    (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)

  • Tao Wu

    (Tianjin Hydraulic Research Institute, Tianjin 300061, China)

  • Jie Yang

    (Tianjin Hydraulic Research Institute, Tianjin 300061, China)

  • Xue Jiang

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

  • Jicheng Zhong

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

Abstract

Nutrients released from sediments have a significant influence on the water quality in eutrophic lakes and reservoirs. To clarify the internal nutrient load and provide reference for eutrophication control in Yuqiao Reservoir, a drinking water source reservoir in China, pore water profiles and sediment core incubation experiments were conducted. The nutrients in the water (soluble reactive P (SRP), nitrate-N (NO 3 − -N), nitrite-N (NO 2 − -N), and ammonium-N (NH 4 + -N)) and in the sediments (total N (TN), total P (TP) and total organic carbon (TOC)) were quantified. The results show that NH 4 + -N was the main component of inorganic N in the pore water. NH 4 + -N and SRP were higher in the pore water than in the overlying water, and the concentration gradient indicated a diffusion potential from the sediment to the overlying water. The NH 4 + -N, NO 3 − -N, and SRP fluxes showed significant differences amongst the seasons. The NH 4 + -N and SRP fluxes were significantly higher in the summer than in other seasons, while NO 3 − -N was higher in the autumn. The sediment generally acted as a source of NH 4 + -N and SRP and as a sink for NO 3 − -N and NO 2 − -N. The sediments release 1133.15 and 92.46 tons of N and P, respectively, to the overlying water each year.

Suggested Citation

  • Shuailong Wen & Tao Wu & Jie Yang & Xue Jiang & Jicheng Zhong, 2019. "Spatio-Temporal Variation in Nutrient Profiles and Exchange Fluxes at the Sediment-Water Interface in Yuqiao Reservoir, China," IJERPH, MDPI, vol. 16(17), pages 1-16, August.
    • Handle: RePEc:gam:jijerp:v:16:y:2019:i:17:p:3071-:d:260516
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    Cited by:

    1. Chen-Yang Shou & Ye Tian & Bin Zhou & Xu-Jin Fu & Yun-Ji Zhu & Fu-Jun Yue, 2022. "The Effect of Rainfall on Aquatic Nitrogen and Phosphorus in a Semi-Humid Area Catchment, Northern China," IJERPH, MDPI, vol. 19(17), pages 1-14, September.

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