期刊
ENVIRONMENTAL RESEARCH LETTERS
卷 18, 期 11, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1748-9326/ad0255
关键词
reservoir operation; multiple objectives; water quality; proxy model; water resources management
Dam construction has negative impacts on the transport process of water constituents, resulting in various water quality issues in reservoir areas and hindering the sustainable development of hydropower. Conventional reservoir operation optimizations face challenges in mathematizing multiple water quality objectives and solving high-dimensional computational problems. This study proposes a comprehensive methodology that incorporates the concept of transport timescales into optimal reservoir operation, providing a heuristic tool for comprehensive water quality management in reservoirs.
Dam construction hinders the transport process of water constituents, resulting in various water quality issues in reservoir areas that impede the sustainable development of hydropower. Conventional reservoir operation optimizations to address these issues face challenges in mathematizing multiple water quality objectives and solving high-dimensional computational problems. Taking a comprehensive perspective, we propose a methodology that incorporates the concept of transport timescales into optimal reservoir operation. Firstly, a specific transport timescale is estimated through numerical tracer experiments using a 3D hydrodynamic model. Subsequently, a surrogate model is developed to approximate the hydrodynamic model for computationally efficient estimation. Finally, we employ a non-dominated ranking genetic algorithm, combined with the surrogate model, to search for a Pareto-optimal solution for multiple objectives. As a case study, we selected flushing time as the representation of transport timescales and applied it to Xiangxi Bay (XXB) in the Three Gorges Reservoir, which has experienced serious water quality problems since dam construction. Our results show that under the optimal operation scheme, the average flushing time for the entire XXB is 23.991 d, which represents a 10.9% reduction compared to the practical operation scheme. The reduction rate of flushing time along XXB shows a monotonically increasing trend towards the reservoir mainstream, with a maximum reduction of 90.9%. The proposed methodology provides a heuristic tool that links optimal reservoir operation and the transport process of holistic water constituents for comprehensive water quality management in reservoirs.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据