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A Coupled Modeling Approach for Water Management in a River–Reservoir System

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Listed:
  • Zhenyu Zhang

    (Coastal and Ocean Management Institute, Xiamen University, Xiamen 361102, China)

  • Jinliang Huang

    (Coastal and Ocean Management Institute, Xiamen University, Xiamen 361102, China)

  • Min Zhou

    (Coastal and Ocean Management Institute, Xiamen University, Xiamen 361102, China)

  • Yaling Huang

    (Coastal and Ocean Management Institute, Xiamen University, Xiamen 361102, China)

  • Yimin Lu

    (Spatial Information Research Center of Fujian Province, Fuzhou University, Fuzhou 350108, China)

Abstract

A coupled model is an effective tool to understand the nutrient fate associated with hydrodynamic and ecosystem processes and thereby developing a water resource management strategy. This paper presents a coupled modeling approach that consists of a watershed model and a hydrodynamic model to evaluate the nutrient fate in a river–reservoir system. The results obtained from the model showed a good agreement with field observations. The results revealed that the Shuikou reservoir (Fuzhou, China)exhibited complicated hydrodynamic characteristics, which may induce the pattern of nutrient export. Reservoirs can greatly lower water quality as a result of decreasing water movement. Three scenarios were analyzed for water management. The NH 3 -N (Ammonia Nitrogen) decreased sharply in the outlet of Shuikou reservoir after NH 3 -N level in its tributary was reduced. After removing the farming cages, the water quality of the outlet of Shuikou reservoir was improved significantly. The DO (Dissolved Oxygen) had increased by 3%–10%, NH 3 -N had reduced by 5%–17%, and TP (Total Phosphorus) had reduced by 6%–21%. This study demonstrates that the proposed coupled modeling approach can effectively characterize waterway risks for water management in such a river–reservoir system.

Suggested Citation

  • Zhenyu Zhang & Jinliang Huang & Min Zhou & Yaling Huang & Yimin Lu, 2019. "A Coupled Modeling Approach for Water Management in a River–Reservoir System," IJERPH, MDPI, vol. 16(16), pages 1-14, August.
    • Handle: RePEc:gam:jijerp:v:16:y:2019:i:16:p:2949-:d:258239
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    References listed on IDEAS

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    3. Felzer, Benjamin S., 2012. "Carbon, nitrogen, and water response to climate and land use changes in Pennsylvania during the 20th and 21st centuries," Ecological Modelling, Elsevier, vol. 240(C), pages 49-63.
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