Changes in the Hydrological Regime of Dongting Lake during the Refill Operation of the Three Gorges Reservoir
Publication: Journal of Hydrologic Engineering
Volume 27, Issue 10
Abstract
The Three Gorges Reservoir (TGR) plays an important role in water resource management, and its influence on the downstream flow has attracted much attention. In this work, Dongting Lake was selected as a case study to analyze the influence of the TGR on the hydrological regime. A one-dimensional and two-dimensional (1D and 2D) coupled hydrodynamic model based on Mike simulation modules (MIKE) was constructed for the Yangtze River and Dongting Lake to analyze the hydrological changes induced by the TGR. Hydrological data from 2015 to 2016 were chosen for calibration, and observed data from 2017 were used for validation of the model. The results show that the TGR operation reduced the Jingjiang River inflow and changed the speed of the outflow from Dongting Lake to the Yangtze River during the refill operation period. The methodology for analyzing the influence of the TGR on the hydrological regime using the 1D–2D coupled hydrodynamic model is generic and can thus provide technical support for optimally scheduling the TGR during refill operation.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
This research was funded by the Research Project of Three Gorges Group Co., Ltd. (Grant No. 0799239), and the open fund of Key Laboratory of Flood and Drought Disaster Defense, the Ministry of Water Resource (Grant No. KYFB202112060041).
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Journal of Hydrologic Engineering
Volume 27 • Issue 10 • October 2022
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Jun 2, 2021
Accepted: May 26, 2022
Published online: Aug 12, 2022
Published in print: Oct 1, 2022
Discussion open until: Jan 12, 2023
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