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The Influence Research on Nitrogen Transport and Reaction in the Hyporheic Zone with an In-Stream Structure

Author

Listed:
  • Ruikang Sun

    (Hubei Key Laboratory of Ecological Restoration of River-Lakes and Algal Utilization, Hubei University of Technology, Wuhan 430068, China)

  • Jiawei Dong

    (Hubei Key Laboratory of Ecological Restoration of River-Lakes and Algal Utilization, Hubei University of Technology, Wuhan 430068, China)

  • Yi Li

    (Hubei Key Laboratory of Ecological Restoration of River-Lakes and Algal Utilization, Hubei University of Technology, Wuhan 430068, China)

  • Panwen Li

    (Foreign Environmental Cooperation Center, Ministry of Ecology and Environment of China, Beijing 100035, China)

  • Yaning Liu

    (Department of Mathematical and Statistical Sciences, University of Colorado Denver, Denver, CO 80204, USA)

  • Ying Liu

    (Hubei Key Laboratory of Ecological Restoration of River-Lakes and Algal Utilization, Hubei University of Technology, Wuhan 430068, China)

  • Jinghong Feng

    (Hubei Key Laboratory of Ecological Restoration of River-Lakes and Algal Utilization, Hubei University of Technology, Wuhan 430068, China)

Abstract

The hyporheic zone (HZ) is important for river ecological restoration as the main zone with nitrogen biochemical processes. The engineering of river ecological restoration can significantly change the hydrodynamics, as well as solute transport and reaction processes, but it is still not fully understood. In this study, nitrogen transport and reaction processes were analyzed in the HZ with an in-stream weir structure. An HZ model was built, and three reactions were considered with different design parameters of the weir structure and different permeability characteristics of porous media. The results show that a structure with a greater height on the overlying surface water enables the species to break through deeper porous media. It promotes the mean spatial reaction rates of nitrification and denitrification and results in increased net denitrification in most cases. In addition, increasing the burial depth of the structure leads to the same variation trends in the mean spatial reaction rates as increasing the structure height. Larger permeability coefficients in porous media can enhance flow exchange and increase mean spatial reaction rates. The results can help deepen the understanding of nitrogen transport and transformation in the HZ and optimize the design parameters and location of the in-stream structure.

Suggested Citation

  • Ruikang Sun & Jiawei Dong & Yi Li & Panwen Li & Yaning Liu & Ying Liu & Jinghong Feng, 2022. "The Influence Research on Nitrogen Transport and Reaction in the Hyporheic Zone with an In-Stream Structure," IJERPH, MDPI, vol. 19(19), pages 1-21, October.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:19:p:12695-:d:933223
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    References listed on IDEAS

    as
    1. Han Li & Ying Liu & Jinghong Feng & Defu Liu & Yi Li & Lihui Chen & Jingwen Xiao, 2022. "Influence of the In-Stream Structure on Solute Transport in the Hyporheic Zone," IJERPH, MDPI, vol. 19(10), pages 1-18, May.
    2. Patrick J. Mulholland & Ashley M. Helton & Geoffrey C. Poole & Robert O. Hall & Stephen K. Hamilton & Bruce J. Peterson & Jennifer L. Tank & Linda R. Ashkenas & Lee W. Cooper & Clifford N. Dahm & Walt, 2008. "Stream denitrification across biomes and its response to anthropogenic nitrate loading," Nature, Nature, vol. 452(7184), pages 202-205, March.
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