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<p>Over the past 2&#xa0;decades, the Vietnamese Mekong Delta has undergone significant changes in flooding patterns and environmental flow, driven by climate change and human activities. This study investigates these transitions, focusing on the impacts of rising temperatures, altered precipitation patterns, and extensive dam construction upstream. Using the Indicators of Hydrologic Alteration in combination with Flow Duration Curves, we quantify the changes in hydrological parameters and assess their ecological and socio-economic consequences. Our findings reveal a marked increase in low flow events, a reduction in the duration of high flows, and a shift in seasonal flow timing. These changes have disrupted the natural flow regime, with significant repercussions for aquatic ecosystems, agriculture, and local livelihoods. The study emphasizes the urgency of adopting holistic transboundary water management strategies to mitigate the adverse consequences of hydrological changes and ensure sustainable development in the region.</p>

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Transition of flooding patterns and environmental flow in the Mekong Delta, Vietnam over the last 2 decades

  • 期刊论文

  • 发表日期：

    2025年5月2日

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  • Huynh Vuong Thu Minh,
  • Nguyen Dinh Giang Nam,
  • Tran Sy Nam,
  • Nguyen Van Cong,
  • Pankaj Kumar,
  • Nigel K. Downes

摘要

Over the past 2 decades, the Vietnamese Mekong Delta has undergone significant changes in flooding patterns and environmental flow, driven by climate change and human activities. This study investigates these transitions, focusing on the impacts of rising temperatures, altered precipitation patterns, and extensive dam construction upstream. Using the Indicators of Hydrologic Alteration in combination with Flow Duration Curves, we quantify the changes in hydrological parameters and assess their ecological and socio-economic consequences. Our findings reveal a marked increase in low flow events, a reduction in the duration of high flows, and a shift in seasonal flow timing. These changes have disrupted the natural flow regime, with significant repercussions for aquatic ecosystems, agriculture, and local livelihoods. The study emphasizes the urgency of adopting holistic transboundary water management strategies to mitigate the adverse consequences of hydrological changes and ensure sustainable development in the region.