依据黄河动床模型相似律完成了小浪底水库下游游荡性河段模型的设计。验证试验结果表明：模型满足水流运动相似、阻力相似、泥沙运动相似、河床变形相似等条件，且通过验证试验选取的河床变形时间比尺与水流运动时间比尺基本一致，从而避免了因时间变态引起的一系列问题。利用该模型对小浪底水库运用后游荡性河道河床演变规律和将出现的问题进行了预估，并先后完成了洪水预报和河道整治方案检验试验。 Based on the similar law of the Yellow River dynamic bed model, the design of the downstream reach of the Xiaolangdi Reservoir was completed. The results of the verification test show that the model meets the conditions of similar water flow movement, similar resistance, similar sediment movement and similar deformation of the riverbed. The riverbed deformation time scale selected by the validation test is basically consistent with the water flow movement time scale, Metamorphosis caused a series of problems. The model was used to predict the evolution of the riverbed of the late-wandering channel and to predict the problems that occurred in the Xiaolangdi Reservoir, and the flood forecast and the river regulation test were completed successively.