| 黄河下游河道河槽形态与输沙特性研究 |
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| 引用本文： | 齐璞,齐宏海,孙赞盈,张原锋.黄河下游河道河槽形态与输沙特性研究[J].泥沙研究,2010(6). |
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| 作者姓名： | 齐璞 齐宏海 孙赞盈 张原锋 |
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| 作者单位： | 黄河水利科学研究院;美国马里兰州NMP工程咨询有限公司; |
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| 基金项目： | 水利部公益性行业科研专项 |
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| 摘 要： | 据多年实测大断面的资料统计,分析了各河段的河槽特性水面宽、宽深比B/h、单宽流量与流量的关系.高村以上游荡性河道随着流量的增加,宽深比B/h增加、单宽流量减小,为宽浅型河道;反之艾山以下为窄深型河流.在实测资料范围内,河段的输沙特性与河槽形态关系密切,宽浅型河道具有"多来多淤多排"的输沙特性,窄深型河流在洪水时具有"多来多排"输沙特性.河槽形态的沿程变化,使得洪水输沙能力没有因比降沿程变小而降低,而是通过河宽的沿程变小,流速增加,洪水的输沙能力沿程增强.其底沙的运动速度比洪水传播的慢是造成黄河下游河道长距离冲刷的根本原因.
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| 关 键 词： | 河槽形态 沿程变化 输沙特性 底沙运动 长距离冲刷 黄河 |
Cross-section geometry and sediment transport characteristics of Lower Yellow River |
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| QI Pu,QI Hong-hai,SUN Zan-ying,ZHANG Yuan-feng.Cross-section geometry and sediment transport characteristics of Lower Yellow River[J].Journal of Sediment Research,2010(6). |
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| Authors: | QI Pu QI Hong-hai SUN Zan-ying ZHANG Yuan-feng |
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| Affiliation: | QI Pu1,QI Hong-hai2,SUN Zan-ying1,ZHANG Yuan-feng1(1.Institute of Hydraulic Research,Yellow River Conservancy Commission,45 Shunhe Rd,Zhengzhou,Henan 450003,China,2.NMP Engineering Consultants,Inc.,Executive Plaza III,Suite LL9,11350 McCormick Road,Hunt Valley,MD 21031,USA) |
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| Abstract: | Based on multi-year surveyed cross-section data of the Lower Yellow River,statistical analysis of the characteristics of channel geometry is performed,and the relationship between water surface width,width to depth ratio(B /h),unit discharge and total discharges are studied.The wandering river section upstream of Gaocun can be classified aswide and shallowchannel,since with the increase of discharge,the width to depth ratio(B /h) also increases,while the unit discharge decreases.On the contrary,the river se... |
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| Keywords: | cross-section geometry sediment transport characteristics movement of bottom sediment long distance erosion Yellow River |
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