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通过系列变率模型试验研究表明，模型变态对水流与泥沙运动均有不同程度的影响：当变率不大于１０，且分流角与两汊过流横断面面积相差均不大时，模型变态对汊道的分流比影响甚微；当变率大于４、模型宽深比小于５ 时，模型变态对纵向垂线平均流速分布、弯道水流动力轴线及其河床变形影响较大，并且模型变态对泥沙冲淤相似的影响较对流场的影响更为敏感。研究还表明，模型变率大小的选择与研究问题的性质密切相关
Through the series of variability model tests, it is shown that the model metamorphism has different degrees of influence on water flow and sediment movement: when the rate of change is not more than 10, and the difference between the flow splitting angle and the cross-sectional area of the two ridges is not large, the model metamorphosis When the rate of deformation is more than 4 and the ratio of width to depth of the model is less than 5, the model metamorphism has a great influence on the distribution of vertical vertical average velocity, the axis of flow and the river bed deformation, and the model metamorphosis The similar impact on sediment deposition and erosion is more sensitive to the influence of convection field. The research also shows that the choice of model variability is closely related to the nature of the research question