| Cite this article: | 霍玉国,洪振国,李建伟.不同年份水沙系列下水库泥沙淤积变化分析[J].灌溉排水学报,,():-. |
| Huo Yuguo,Hong Zhen-guo,Li Jian-wei.不同年份水沙系列下水库泥沙淤积变化分析[J].灌溉排水学报,,():-. |
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| Analysis of Sediment Deposition Change of Reservoir under Water and Sediment Series in Different Years |
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Huo Yuguo, Hong Zhen-guo, Li Jian-wei
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Yunnan Water and Hydropower Engineering Investigation,Design and Research Institute
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| Abstract: |
| Sediment siltation causes the water level in the reservoir area to rise, encroaches on the regulated storage capacity, causes storage capacity loss, reduces the regulation capacity of the reservoir, reduces the benefits of the project, and the harmful particle size wears the hydraulic turbine, causing the reduction of the operating efficiency of the hydraulic turbine, the reduction of output and annual power generation, the shortening of maintenance intervals and the increase of costs, affecting the normal operation of the unit. For most mountainous rivers in Yunnan, the sediment content in the river channel is strongly affected by the seasons, the sediment particle size changes greatly, and the river trend has many bends. The constant one-dimensional uniform flow mathematical model cannot truly reflect the reservoir sediment deposition, and is not applicable to Yunnan. At the same time, it is important to analyze the reservoir sediment deposition change under the different years of water and sediment series. In this paper, the susbed-2 one-dimensional steady non-uniform sediment transport model developed by wuhan university of water conservancy and electric power is used to calculate and analyze the changes of sediment deposition in reservoirs in different years. The results show that:. (2) In 1998, the accumulated sediment deposition of water and sediment series was relatively large, while in 1992~2001, the accumulated sediment deposition of water and sediment series was relatively small, but their total sediment deposition was not far away, and the accumulated sediment deposition was generally increasing. (3) Compared with the results obtained under the water and sediment series from 1992 to 2001, the amount of sediment deposition is different due to the different amount of sediment entering the reservoir. However, after 2 to 3 years, the sediment discharge ratio under different water and sediment series is stable at more than 90%, with a variation range of 90% to 102%, and the reservoir is basically balanced. |
| Key words: hydropower station reservoir; water and sediment series; sediment transport model; sediment deposition change |
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