| SHEAR STRESS FOR INITIATION OF MOTION OF NON-UNIFORM SEDIMENT MIXTURES |
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| 引用本文： | Liton Kumar SARKER M. Monowar HOSSAIN M. Anisul HAQUE. SHEAR STRESS FOR INITIATION OF MOTION OF NON-UNIFORM SEDIMENT MIXTURES[J]. 国际泥沙研究, 2007, 22(3): 169-179 |
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| 作者姓名： | Liton Kumar SARKER M. Monowar HOSSAIN M. Anisul HAQUE |
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| 作者单位： | Assis. Engg. Bangladesh Water Development Board (BWDB) Lakshmipur Bangladesh，Prof. Department of Water Resources Engineering Bangladesh University of Engineering and Technology (BUET) Dhaka-1000 Bangladesh，Prof. Institute of Water and Flood Management (IWFM) Bangladesh University of Engineering and Technology (BUET) Dhaka-1000 Bangladesh |
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| 摘 要： | Experiments on initiation of motion of different fractions of non-uniform sediment mixtures are reported. Four sediment mixes and reference transport method to define the threshold of bed particle movement are used in this analysis. Factors controlling the initiation of motion are analyzed. It is found that relative size of different grains with respect to a median size greatly affects the initiation of movement. The incipient motion of non-uniform sediment is very much dependent on the absolute size for coarser fractions. Considering the factors controlling the initiation of motion the experimental data sets along with the other available data yield a new relationship for the calculation of critical shear stress of non-uniform sediments. A set of equations have found that all the data points fall into a single line for the finer and for coarser fractions.
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| 关 键 词： | 临界 剪切力 沉淀物 淤泥 |
| 修稿时间： | 2006-05-01 |
SHEAR STRESS FOR INITIATION OF MOTION OF NON-UNIFORM SEDIMENT MIXTURES |
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| Liton Kumar SARKER,M. Monowar HOSSAIN,M. Anisul HAQUE. SHEAR STRESS FOR INITIATION OF MOTION OF NON-UNIFORM SEDIMENT MIXTURES[J]. International Journal of Sediment Research, 2007, 22(3): 169-179 |
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| Authors: | Liton Kumar SARKER M. Monowar HOSSAIN M. Anisul HAQUE |
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| Abstract: | Experiments on initiation of motion of different fractions of non-uniform sediment mixtures are reported. Four sediment mixes and reference transport method to define the threshold of bed particle movement are used in this analysis. Factors controlling the initiation of motion are analyzed. It is found that relative size of different grains with respect to a median size greatly affects the initiation of movement. The incipient motion of non-uniform sediment is very much dependent on the absolute size for coarser fractions. Considering the factors controlling the initiation of motion the experimental data sets along with the other available data yield a new relationship for the calculation of critical shear stress of non-uniform sediments. A set of equations have found that all the data points fall into a single line for the finer and for coarser fractions. |
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| Keywords: | Non-uniform sediment Critical shear stress Incipient motion Reference shear stress Reference Transport Method (RTM) |
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