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<p>Sediment accumulation in reservoirs reduces storage capacity and threatens long-term operational safety and efficiency, while also affecting downstream water quality. This study combines monitoring and modeling to analyze sediment dynamics and improve management in the Enguri reservoir. Methods included topographic mapping, sub-bottom profiling, and water sample analysis. Sediment transport was simulated using Delft3D, considering variable hydrological and operational conditions. Results showed a 16% loss in storage volume, mainly in the dead storage zone. Depth profile analysis quantified sediment deposition, while modeling highlighted reservoir water level as a key factor. Partial flushing of the dam proved to be suboptimal, ultimately leading to the recommendation of drawdown flushing strategies. The integrated approach provided valuable insights and practical recommendations to enhance sediment management, extend reservoir lifespan, and protect downstream ecosystems. This study offers a robust framework for addressing sediment challenges in large reservoirs like Enguri.</p>

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Monitoring und Modellierung der Verlandungsdynamik des Enguri-Stausees in Georgien

  • 期刊论文

  • 发表日期：

    2026年4月27日

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  • Andreas Kron,
  • Tim Jakobs,
  • Peter Oberle,
  • Klaijdi Sotiri,
  • Stephan Hilgert

摘要

Sediment accumulation in reservoirs reduces storage capacity and threatens long-term operational safety and efficiency, while also affecting downstream water quality. This study combines monitoring and modeling to analyze sediment dynamics and improve management in the Enguri reservoir. Methods included topographic mapping, sub-bottom profiling, and water sample analysis. Sediment transport was simulated using Delft3D, considering variable hydrological and operational conditions. Results showed a 16% loss in storage volume, mainly in the dead storage zone. Depth profile analysis quantified sediment deposition, while modeling highlighted reservoir water level as a key factor. Partial flushing of the dam proved to be suboptimal, ultimately leading to the recommendation of drawdown flushing strategies. The integrated approach provided valuable insights and practical recommendations to enhance sediment management, extend reservoir lifespan, and protect downstream ecosystems. This study offers a robust framework for addressing sediment challenges in large reservoirs like Enguri.