Multiobjective Reservoir Optimization Considering Sedimentation Applied to the Three Gorges Reservoir
Publication: Journal of Water Resources Planning and Management
Volume 147, Issue 4
Abstract
Increasing the power generation and reducing the sediment deposition in a reservoir are two contradictory and incommensurable objectives. Hence, these two operational objectives rarely are considered simultaneously in reservoir optimization. This study proposes a method to balance sediment desilting and power generation in reservoirs, and to study their quantitative relationship. First, a formula to calculate the suspended sediment transport rate for reservoirs was established. Second, based on that formula, a multiobjective model was built that considers simultaneously, the sediment transporting efficiency and the power generation efficiency. The nondominated sorting genetic algorithm (NSGA-II) along with Pareto optimality was used to find the Pareto front of the model. The proposed method was applied to the Three Gorges project in China. The research results not only provide the Pareto front of the reservoir operation scheme, but also imply that the maximum annual sediment runoff was improved by 6% at the expense of 9% of the annual power generation.
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Data Availability Statement
Sediment concentration data that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
This research was supported by the Integration Program of the Major Research Plan of the National Natural Science Foundation of China (91847302) and the National Natural Science Foundation of China (51879137 and 51979276). The authors thank Xiaoyong Hu from China Three Gorges Corporation for the consultation.
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Published In
Journal of Water Resources Planning and Management
Volume 147 • Issue 4 • April 2021
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Feb 24, 2020
Accepted: Sep 30, 2020
Published online: Feb 3, 2021
Published in print: Apr 1, 2021
Discussion open until: Jul 3, 2021
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