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河床质中几乎没有悬移质颗粒，对河床演变起主要作用的是推移质泥沙。Bedload is the main factor resulting in bed form for few sands of suspend load in the river bed.

分别用几种有代表性的输沙率公式计算了都江堰河段的推移质输沙率。Finally, bedload transport rate of Dujiangyan was computed with several representative formulas.

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底沙运动过程中粗粒沙滞留在沙洲，细粒沙被搬走。In the bedload movement process, coarse sand tended to stay on the sand bar, find sand was brought away.

利用极值假说研究输沙率为零时的稳定断面形状。The research of stable channel shape on the condition of bedload discharge equals zero by use the extreme hypotheses.

主要在床沙与推移质交换的同时，考虑了床沙与推移质向悬移质的净交换。Especially, while exchanging between bedload and bed material, the net transport of bed load towards waters was considered.

文中基于无线遥测技术，设计了水库泥沙量远程无人值守自动测报系统。Based on wireless remote measure technology, remote automatic measure system for reservoir- bedload is designed in this pa- per.

经上述修正的推移质公式与试验资料符合良好，可供计算应用。The bedload transport formula that has been modified as mentioned above well agrees with the experimental data and can be applied to computation.

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基于任意面上非粘性沙颗粒的受力分析，考虑了非平衡条件，推导了更具普遍性的泥沙输移矢量式。Based on the analysis of non equilibrium forces acting on a non cohesive particle, the general vectorial equation of bedload transport is derived.

实质上是床沙、推移质和悬移质根据当地水流条件引起的比例再分配，趋向于泥沙交换平衡方向调整。As a matter of fact, the proportion of bed material, bedload and suspended load may redistribute and adjust to equilibrium exchanging according to flow intensity.

该模型考虑了非均匀推移质不平衡输移，并引入混合层模式用于模拟河床组成的变化。This model takes into account non-equilibrium transport of non-uniform bedload and introduces the mixed layer model to calculate the changes of bed material grain class.

实测资料表明，推移质输沙率与床面层内有效水流功率有良好的相关性，且高于推移质输沙率与水流功率的相关性。The measured data show that the bedload sediment transport rate is related more closely to the effective stream power within the bed-surface layer than to the river stream power.