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<p>With the increasing frequency of global drought events, implementing effective monitoring and early warning systems is essential. The drought-limited water level (DLWL) is a new indicator for drought management in China. This study proposes a refined optimization method for determining the DLWL and drought-resistant operational strategies for each reservoir in multi-reservoir systems based on a general water allocation and simulation model. This study takes representative reservoirs in the North China Plain as a case study. Results show that DLWL effectively mitigates regional water shortages during droughts, reducing overall shortages by 12% in light dry years and 27% in extremely dry years, and reducing severe damage from 75 to 25% by transforming it into more moderate wide and shallow damage during consecutive dry years. In addition, the refined method proved superior to the traditional aggregated approach by enabling more accurate determination of reservoir-specific DLWL, improving drought management efficiency, and mitigating water shortages. The method is well-suited for DLWL determination in complex multi-reservoir systems and provides important references for drought-resistant management of reservoirs.</p>

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Determination and Application of a New Drought Resistant Control Water Level for Multi-Reservoir Systems Based on a Water Resource Allocation Model

  • 期刊论文

  • 发表日期：

    2025年7月12日

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  • Yaping Cheng,
  • Ziqi Yan,
  • Denghua Yan,
  • Miao Liu,
  • Ruishen Wei

摘要

With the increasing frequency of global drought events, implementing effective monitoring and early warning systems is essential. The drought-limited water level (DLWL) is a new indicator for drought management in China. This study proposes a refined optimization method for determining the DLWL and drought-resistant operational strategies for each reservoir in multi-reservoir systems based on a general water allocation and simulation model. This study takes representative reservoirs in the North China Plain as a case study. Results show that DLWL effectively mitigates regional water shortages during droughts, reducing overall shortages by 12% in light dry years and 27% in extremely dry years, and reducing severe damage from 75 to 25% by transforming it into more moderate wide and shallow damage during consecutive dry years. In addition, the refined method proved superior to the traditional aggregated approach by enabling more accurate determination of reservoir-specific DLWL, improving drought management efficiency, and mitigating water shortages. The method is well-suited for DLWL determination in complex multi-reservoir systems and provides important references for drought-resistant management of reservoirs.