【摘要】 Froude数同水流强度和水流能量关系密切,水深型Froude数不适用于黄河沙质河段,面积型Froude数在判断复杂河流水流相对强度、河床冲淤与稳定程度等方面都有较大价值。本文以此为基础研究面积型Froude数在河型判别的应用,利用不同河型临界关系式,得到整治流量或整治河宽计算式,以及均衡条件下的河床形态公式。根据黄河模型小河造床过程,得到主槽最大输沙或相对稳定状态下,断面单位能量与河相系数关系方程,进一步研究了最大输沙流量对应的主河槽宽深尺度的计算。更多还原

【Abstract】 The water depth type Froude number is not applicable to the sandy river section of the Yellow River. The area type Froude number can describe the relative intensity of water flow, and it is great value in terms of stability and scour of the complex river bed. The application of the area type Froude number as the channel pattern discrimination is studied. After introducing the Manning formula, a series of riverbed configuration formulas under equilibrium conditions are constructed. The relationship between the unit energy of maximum sediment transport and fluvial phase coefficient are obtained based on the model test, and the calculation of the main channel scale corresponding to the maximum sediment transport flow is further studied.更多还原