| 基于能量耗散关系的黄河内蒙段河床形态调整分析 |
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| 引用本文： | 孙东坡,杨真真,张立,李彬.基于能量耗散关系的黄河内蒙段河床形态调整分析[J].水科学进展,2011,22(5):653-661. |
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| 作者姓名： | 孙东坡 杨真真 张立 李彬 |
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| 作者单位： | 1.华北水利水电学院水力学及河流研究所, 河南郑州 450011; |
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| 基金项目： | 国家自然科学基金资助项目(51079055); 水利部公益性行业科研专项经费资助项目(200901018)~~ |
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| 摘 要： | 从河流能量耗散角度研究河床形态调整规律,引入河流功与纵、横向能坡等指标,对50年实测资料进行了研究。黄河内蒙河段受上游水库影响,出现如漫滩洪水减小等水沙过程变化,导致河床宽深比增大,平面活动性增强。在河床形态调整过程中,受水库运用影响的来沙系数与河相系数之间、主槽摆动速率与水沙特征值之间均存在密切联系。分析该河段断面形态变化、平面摆动特性与能量耗散的关系表明:反映河流功的径流量及其过程对河槽过流面积的塑造有直接影响;径流因子与河床形态因子间的相关性受河流能量耗散结构的制约;在研究河段,与来沙系数S/Q有关的河流总功率跟与河段平面摆动速率、月径流离差系数有关的能量分配耗散组合,在不同时期总保持近似制衡关系。
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| 关 键 词： | 河床演变 能量耗散 河流功 制约机制 河相系数 平面活动性 |
| 收稿时间： | 2010-11-17 |
Analysis of riverbed form adjustment based on energy dissipation in the Inner Mongolia Reach of Yellow River |
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| SUN Dong-po,YANG Zhen-zhen,ZHANG Li,LI Bin.Analysis of riverbed form adjustment based on energy dissipation in the Inner Mongolia Reach of Yellow River[J].Advances in Water Science,2011,22(5):653-661. |
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| Authors: | SUN Dong-po YANG Zhen-zhen ZHANG Li LI Bin |
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| Institution: | 1.Hydraulics and River Research Institute, North China University of Water Resources and Electric Power, Zhengzhou 450011, China;2.Guangdong Research Institute of Water Resources and Hydropower, Guangzhou 510140, China |
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| Abstract: | In order to study the adjustment regulation of riverbed form,in view of river energy dissipation,the 50-year river data collected from the Inner Mongolia Reach of Yellow River is analyzed by introducing the targets such as river work,longitudinal and transverse energy slope.It is found that the operation of upstream reservoirs has a great impact on the hydraulic regime of the river reach,such as decreasing the frequency of overbank flooding,increasing the channel width/depth ratio,and enhancing the horizont... |
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| Keywords: | fluvial process river energy dissipation water energy constraint mechanism parameter of fluvial facies horizontal activity |
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