Zhang et al. (2026) From precipitation forecasts to optimal reservoir operation: an integrated downscaling-forecasting-operation framework for reservoir floodwater utilization

Identification

• Journal: Journal of Hydrology
• Year: 2026
• Date: 2026-09-04
• Authors: Libin Zhang, Keke Zhou, Yonggen Zhang, Jianzhu Li, Ping Feng, Zhanguo Sun, Qinghua Liu, Lutz Weihermüller
• DOI: 10.1016/j.jhydrol.2026.136371

Research Groups

• Institute of Hydrology and Water Resources, China University of Geosciences (Beijing)
• Department of Hydraulic Engineering, Tsinghua University (Beijing)
• Helmholtz Centre for Environmental Research - UFZ (Leipzig, Germany)

Short Summary

This study presents an integrated framework that combines downscaling, forecasting, and operation to optimize reservoir floodwater utilization. The framework was successfully applied in a case study of the Three Gorges Reservoir.

Objective

• Investigate the potential of integrating downscaling and forecasting techniques with reservoir operation rules for improved floodwater management

Study Configuration

• Spatial Scale: Watershed scale (Three Gorges Reservoir, China)
• Temporal Scale: Daily to seasonal time scales

Methodology and Data

• Models used:
  • WRF-Hydro model for downscaling and forecasting
  • MIKE11 model for reservoir operation simulation
• Data sources:
  • Precipitation forecasts from the National Meteorological Center of China
  • Reservoir water level and outflow data from the Three Gorges Dam

Main Results

• The integrated framework improved floodwater utilization by 15% compared to traditional operation rules.
• The optimal reservoir operation strategy was identified as a function of precipitation forecasts, current reservoir state, and downstream flow requirements.

Contributions

• This study provides an innovative approach to integrating downscaling and forecasting techniques with reservoir operation rules for improved floodwater management.
• The framework can be applied to other large-scale reservoirs worldwide.

Funding

• National Key Research and Development Program of China (Grant No. 2016YFC0401404)
• German Federal Ministry of Education and Research (BMBF) through the Helmholtz Association (Grant No. ZT-I-5-06)

Citation

@article{Zhang2026From,
  author = {Zhang, Libin and Zhou, Keke and Zhang, Yonggen and Li, Jianzhu and Feng, Ping and Sun, Zhanguo and Liu, Qinghua and Weihermüller, Lutz},
  title = {From precipitation forecasts to optimal reservoir operation: an integrated downscaling-forecasting-operation framework for reservoir floodwater utilization},
  journal = {Journal of Hydrology},
  year = {2026},
  doi = {10.1016/j.jhydrol.2026.136371},
  url = {https://doi.org/10.1016/j.jhydrol.2026.136371}
}