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- W4308646411 abstract "The construction of fish passage facilities is a promising approach to balance fish conservation and water resource development by improving river connectivity. To be successful, a fishway must efficiently attract fish to its entrance and have an interior flow field that meets the needs of migrating fish. In this paper, methods were explored to improve the efficiency of fishway passages by optimizing the flow field near the fishway entrance and the flow field inside the fishway in a case study at the Niuling Reservoir in the lower Yangtze River basin. The original engineering design was modified by designing a unique retaining wall with a notch to shape the appropriate flow pattern near the fishway entrance. The new wall optimized the flow field near the fish entrance to meet the hydraulic demands of target fishes under three operating scenarios, and the area of the suitable velocity zone increased by 48.79%, 12.71%, and 4.06% in scenarios 1 through 3, respectively. The original vertical slot fishway was modified with a sill to optimize the flow field inside the fishway. The optimized fishway design scheme reduced the main flow velocity inside the fishway to a large extent, and the maximum flow velocity in the upstream and downstream sections of the fishway decreased by 0.10 m/s and 0.09 m/s on average, respectively. The results of this study provide an important reference for the construction and optimization of fish passage facilities and have great significance for fish migration and biological diversity." @default.
- W4308646411 created "2022-11-13" @default.
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- W4308646411 date "2023-01-01" @default.
- W4308646411 modified "2023-09-23" @default.
- W4308646411 title "Optimization schemes to significantly improve the upstream migration of fish: A case study in the lower Yangtze River basin" @default.
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- W4308646411 doi "https://doi.org/10.1016/j.ecoleng.2022.106838" @default.
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