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Quantifying the Impacts of Climate Change and Human Interventions on Flow Alterations in a Tropical River

Author

Listed:
  • Doan Binh

    (Vietnamese-German University)

  • Binh Quang Nguyen

    (The University of Danang - University of Science and Technology
    Kyoto University)

  • Thi-Thu-Ha Nguyen

    (Van Lang University
    Van Lang University)

  • Xuan-Hien Le

    (Thuyloi University)

  • Luc Anh Tuan

    (Vietnamese-German University)

  • Manh-Hung Le

    (NASA Goddard Space Flight Center
    Science Applications International Corporation)

  • Sameh A. Kantoush

    (Kyoto University)

  • Tam V. Nguyen

    (Helmholtz Centre for Environmental Research - UFZ)

  • Vuong Nguyen Dinh

    (Southern Institute of Water Resources Research - Vietnam Academy for Water Resources)

  • Nguyen Thanh Luan

    (The Key Laboratory of River and Coastal Engineering)

  • Menna Farag Ahmed

    (Kyoto University)

  • Tetsuya Sumi

    (Kyoto University)

Abstract

This study aims to quantify the effects of climate variability, dams, and land use/land cover (LULC) changes on the alterations in the monthly, seasonal, and annual discharge in the Sai Gon Dong Nai (SGDN) River basin, a tropical river system in Vietnam. We employed statistical methods (statistical tests, linear regression, and double mass curves) combined with the Soil and Water Assessment Tool (SWAT) model. We found that (1) climate variability is the primary driver of natural flow, but human activities are essential contributors to statistically significant flow alterations. (2) Dams and reservoirs in the SGDN River basin may have dampened the effects of LULC changes on reducing downstream flood discharge. (3) The Da Nhim and Dai Ninh diversion reservoirs may have had a limited impact on flow alterations in the Dong Nai River. (4) In contrast, the Phuoc Hoa diversion reservoir may have reduced flooding in the Be River but partially increased flooding in the Sai Gon River. (5) Quantitatively, human activities contributed −14.2% to + 22.3% and −55.7% to + 66.5% of the annual and monthly discharge changes in the SGDN River Basin. The findings of this study provide valuable insights for strategic water management in the SGDN River Basin and contribute to efforts to promote sustainable development in river basins within tropical monsoon regions.

Suggested Citation

  • Doan Binh & Binh Quang Nguyen & Thi-Thu-Ha Nguyen & Xuan-Hien Le & Luc Anh Tuan & Manh-Hung Le & Sameh A. Kantoush & Tam V. Nguyen & Vuong Nguyen Dinh & Nguyen Thanh Luan & Menna Farag Ahmed & Tetsuya, 2025. "Quantifying the Impacts of Climate Change and Human Interventions on Flow Alterations in a Tropical River," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 39(7), pages 3537-3552, May.
    • Handle: RePEc:spr:waterr:v:39:y:2025:i:7:d:10.1007_s11269-025-04121-w
    DOI: 10.1007/s11269-025-04121-w
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    References listed on IDEAS

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    3. C. J. Vörösmarty & P. B. McIntyre & M. O. Gessner & D. Dudgeon & A. Prusevich & P. Green & S. Glidden & S. E. Bunn & C. A. Sullivan & C. Reidy Liermann & P. M. Davies, 2010. "Global threats to human water security and river biodiversity," Nature, Nature, vol. 467(7315), pages 555-561, September.
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