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Comprehensive Treatment for River Pollution in a Coastal City with a Complex River Network: A Case Study in Sanya, China

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  • Wenqing Song

    (State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
    Shanghai Municipal Engineering Design Institute (Group) Co., Ltd., Shanghai 200092, China)

  • Shizhuo Wang

    (State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
    Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China)

  • Jiang Zhao

    (State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China)

  • Shiliang Xu

    (State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
    Shanghai Municipal Engineering Design Institute (Group) Co., Ltd., Shanghai 200092, China)

  • Xuefei Zhou

    (State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
    Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China)

  • Yalei Zhang

    (State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
    Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China)

Abstract

The contamination of urban rivers substantially threatens urban ecology, public health, and general progress. Addressing this matter is complex and challenging, particularly in tidal rivers. After investigating the climate conditions, population, and distribution of rivers and pollution in Sanya, China, a hydraulic and water quality model was built for Sanya utilizing InfoWorks ICM, and a comprehensive remediation approach was proposed. The implementation of this scheme led to a substantial decrease in point and non-point sources of pollution. In particular, COD, NH 3 -N, and TP were reduced by 87.00%, 84.01%, and 74.24%, respectively, from point source pollution. Point source pollution was well-managed north of the bridge, with a reduction rate close to 40% for non-point source pollution. This research confirmed that pollutants are only temporarily retained in the river at high tide and are discharged as the tide recedes, thus having a limited impact on long-term pollution discharge. This research provides valuable references for applying water environment models and the comprehensive treatment of tidal river pollution. The final plan scheme is to significantly improve the water quality of Sanya’s rivers by effectively controlling the discharge of pollutants while achieving considerable cost savings of approximately CNY 1.7 billion.

Suggested Citation

  • Wenqing Song & Shizhuo Wang & Jiang Zhao & Shiliang Xu & Xuefei Zhou & Yalei Zhang, 2023. "Comprehensive Treatment for River Pollution in a Coastal City with a Complex River Network: A Case Study in Sanya, China," Sustainability, MDPI, vol. 15(8), pages 1-15, April.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:8:p:6830-:d:1126697
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    References listed on IDEAS

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    1. Reza Naimaee & Abbas Kiani & Sina Jarahizadeh & Seyed Babak Haji Seyed Asadollah & Pablo Melgarejo & Antonio Jodar-Abellan, 2024. "Long-Term Water Quality Monitoring: Using Satellite Images for Temporal and Spatial Monitoring of Thermal Pollution in Water Resources," Sustainability, MDPI, vol. 16(2), pages 1-20, January.

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