| 挟极细沙水流的明渠综合糙率系数变化规律研究 |
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| 引用本文： | 朱长军,郝振纯,江恩惠,李军华,赵连军. 挟极细沙水流的明渠综合糙率系数变化规律研究[J]. 三峡大学学报(自然科学版), 2008, 30(5) |
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| 作者姓名： | 朱长军 郝振纯 江恩惠 李军华 赵连军 |
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| 作者单位： | 1. 河海大学水文水资源与水利工程科学国家重点实验室,南京,210098
2. 黄河水利科学研究院,郑州,450003 |
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| 基金项目： | 国家"十一五"科技支撑计划项目，国家自然科学基金委员会与水利部黄河水利委员会黄河联合基金资助项目 |
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| 摘 要： | 小浪底调水调沙过程中,黄河中下游发生的洪峰异常增值现象是由河道糙率减小所致.通过挟极细沙水流的明渠水槽实验,证明极细沙在粗糙床面具有明显的减阻作用,并对减阻机理进行了分析.该研究对于含沙水流的运动规律以及洪水的预报与防洪具有重要的参考价值.
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| 关 键 词： | 糙率 减阻 挟沙水流 实验 |
A Study of Roughness with Extra Fine Sediment in Open Channel |
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| Zhu Changjun,Hao Zhenchun,Jiang Enhui,Li Junhua,Zhao Lianjun. A Study of Roughness with Extra Fine Sediment in Open Channel[J]. Journal of China Three Gorges University(Natural Sciences), 2008, 30(5) |
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| Authors: | Zhu Changjun Hao Zhenchun Jiang Enhui Li Junhua Zhao Lianjun |
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| Affiliation: | Zhu Changjun1 Hao Zhenchun1 Jiang Enhui2 Li Junhua2 Zhao Lianjun2 (1.State Key Laboratory of Hydrology-Water Resources , Hydraulic Engineering,Hohai Univ.,Nanjing 210098,China,2.Yellow River Institute of Hydraulic Research,Zhengzhou 450003,China) |
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| Abstract: | In view of the abnormal phenomenon that a flood peak increased in August 2004 and July 2005 along the lower Yellow River,the mechanism of this abnormal phenomenon is studied.It is found that the flood increase was due to the decrease the channel roughness in the propagation of high concentrated flood carrying the extra fine sediment which was discharged from the Xiaolangdi Reservoir.Then the experiment with extra fine sediment flowing smooth,roughness beds is studied.Based on the comparison between the dist... |
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| Keywords: | roughness drag reduction flow with suspended sediment experiment |
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