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Water Resource Regulation and Evaluation Method Based on Optimization of Drought-Limited Water Level in Reservoir Group

Author

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  • Sheng He

    (State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China)

  • Dongmei Wang

    (Jiangsu Hydraulic Research Institute, Nanjing 210017, China)

  • Xuefeng Sang

    (State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China)

  • Geng Niu

    (State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China)

Abstract

Reservoirs, as critical nodes in regional water management, play an increasingly important role in drought mitigation. This study aims to optimize the drought-limited water level in the reservoir group and propose an evaluation method for selecting the optimal regulation scheme during drought periods. The reservoir water supply module within the Water Allocation and Simulation (WAS) model was enhanced to optimize the drought-limited water level of the reservoir group. A comprehensive adaptation index (CAI) was developed to quantitatively evaluate the effectiveness of water resource regulation under various drought scenarios. This methodology was applied to large and medium-sized reservoirs in the central Yunnan Province, China. The results show that the optimized drought-limited water level significantly improved the water supply performance of the reservoir group during drought years. Specifically, the optimized drought-limited water level notably reduced severe water shortage for water users in the long series and typical drought years, effectively mitigating the impacts of drought. Additionally, the most suitable water resource regulation strategies for different drought scenarios were identified. These research findings can provide technical references for reservoir management departments and drought operations authorities to formulate drought-limited level for the reservoir group and implement regional drought early warning and defense decision-making.

Suggested Citation

  • Sheng He & Dongmei Wang & Xuefeng Sang & Geng Niu, 2024. "Water Resource Regulation and Evaluation Method Based on Optimization of Drought-Limited Water Level in Reservoir Group," Sustainability, MDPI, vol. 16(16), pages 1-36, August.
    • Handle: RePEc:gam:jsusta:v:16:y:2024:i:16:p:7015-:d:1457219
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