Through incipient motion drag force, it obtains the occurring conditions of scouring.
从土壤的冲刷起动拖曳力入手，得出了发生坡面冲刷的条件。
The results show that the equivalent grain can reflect the characteristics of the sediment incipient motion.
说明采用等效粒径能反映泥沙的起动特性。
When flow velocity decreases below the corresponding incipient motion condition, no sediment movement occurs.
当水流速度小于相应的起始运动时，将无泥沙运动。
According to some previous results, the relationships among three common incipient motion conditions are deduced.
从泥沙起动的已有研究成果出发，推导出常见的3种泥沙起动条件的转换关系。
The quantitative criteria of incipient motion which are quite coincident with various observed data are presented.
在此基础上约定了起动的数量标准，它们能概括起动的各种实际资料。
Using the dynamic laws of sediment incipient motion, an equation of incipient starting of sediment has been derived.
从泥沙起动所遵循起动条件的力学规律出发，导出泥沙起动条件方程。
The research results show that the incipient motion and the erosion of cohesive deposits are greatly influenced by the dry bulk density.
研究结果表明：干容重对粘性淤积物起动和冲刷的影响非常大。
Considering these relationships, dozens of incipient motion conditions are united, and K of all kinds of formulas is otained commonly from 3.37 to 7.86.
利用这些关系，将国内外现有的几十种泥沙起动条件进行了统一，可得各种公式的K值一般在3 37～7 86之间。
Test results show:for the same grain size groups the flow velocity relating incipient motion of these granite sand grains decreases as the bed slope increases;
实验结果表明，同一粒径组的非粘性花岗岩风化砂粒随底坡坡度的增加其起动流速变小；
Based on both shear force and stream power and through theoretical derivation, the incipient motion critical conditions of cohesionless uniform sediment are achieved.
通过理论推导，得出基于剪切力和水流功率的均匀沙起动临界条件表达式。
The formula for calculating the incipient motion condition of non-uniform sediment has been established by considering the equivalent grain and the relative exposure degree.
阐述了泥沙起动机理，通过对等效粒径概念及表达式的引入，推得了泥沙起动公式。
Incipient motion of solid grain in solid-liquid two \ | phase flow is often concerned in many petroleum technologies, such as horizontal drilling, gravel-packing and sand washing.
水平井钻井、砾石充填及冲砂等作业都涉及到固液两相流动的固体颗粒起动问题。
Sediment incipient motion mechanism of rainfall runoff is the important theoretical foundation for soil and water loss control on sloping land and comprehensive treatment of watershed.
坡面降雨径流泥沙起动规律研究对控制坡面水土流失、开展流域综合治理具有重要意义。
According to the statistical theory of sediment transportation the statistical characteristics of incipient sediment motion is further described.
文中根据泥沙运动统计理论进一步阐述和验证了泥沙起动的统计规律。
According to the statistical theory of sediment transportation the statistical characteristics of incipient sediment motion is further described.
文中根据泥沙运动统计理论进一步阐述和验证了泥沙起动的统计规律。
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