| 明渠浅水回流区泥沙淤积的试验研究 |
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| 引用本文： | 王兴奎,Asim M,王龙,郑钧. 明渠浅水回流区泥沙淤积的试验研究[J]. 水力发电学报, 2009, 28(4): 149-153 |
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| 作者姓名： | 王兴奎 Asim M 王龙 郑钧 |
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| 作者单位： | 清华大学水沙科学与水利水电工程国家重点实验室,北京,100084;清华大学水沙科学与水利水电工程国家重点实验室,北京,100084;清华大学水沙科学与水利水电工程国家重点实验室,北京,100084;清华大学水沙科学与水利水电工程国家重点实验室,北京,100084 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 通过试验,系统研究了边墩下游各种糙率条件下的泥沙淤积特性,分析了泥沙淤积的发展过程和变化规律.泥沙主要在矢量流速小于0.1m/s的主流与回流区交界带淤积.试验初期泥沙的淤积速度很快,2.0h后淤积减缓,3.0h基本达到淤积平衡,淤积体的沙脊达到水面.在泥沙淤积大致平衡的条件下,得出了泥沙淤积厚度、淤积面积和淤积体积与水流阻力系数的回归关系,三者均随糙率的加大而增加.
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| 关 键 词： | 河流泥沙工程学 泥沙淤积 回流区 阻力系数 |
Experimental study on sediment deposition in circulation zone of shallow water flows |
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| WANG Xiangkui,Asim M,WANG Long,ZHENG Jun. Experimental study on sediment deposition in circulation zone of shallow water flows[J]. Journal of Hydroelectric Engineering, 2009, 28(4): 149-153 |
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| Authors: | WANG Xiangkui Asim M WANG Long ZHENG Jun |
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| Affiliation: | State Key Laboratory of Hydroscience and Engineering;Tsinghua University;Beijing 100084 |
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| Abstract: | The fluvial process downstream an abutment of 50cm wide under different bed roughness condition was observed by laboratory experiments.The measured data show that most of the sediment deposition is along the border belts of the circulation region,where the flow velocity is less than 0.1m/s.Sediment deposition is very quick at the initial stage of experiment,about two hours later it slows down,and about three hours later the deposition body is approximately in equilibrium.The experiment continues until or un... |
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| Keywords: | river sedimentation engineering sediment deposition circulation zone resistance coefficient |
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