河道模型中泥沙起动粒径公式的比较和验证

Comparison and Verification of Formulas for Starting Grain Size of Sediment in River Modeling

在研究实际工程中的水力学问题时,常常无实测泥沙资料。根据已知的流量资料,分别对四种常用的泥沙起动流速公式进行反算获得相应的泥沙起动粒径,并通过模型试验实测的起动粒径对四种公式的计算结果进行比较和验证,在此基础上选用比较接近实测值的公式来初步估算泥沙级配与输沙率等泥沙参数。为缺乏泥沙资料的河道模型试验提供了一种确定泥沙起动粒径的有效的方法。

By using river modeling for river sediment problems without any measured information of sediment in actual projects, four common formulas of sediment starting velocity can be used for calculating the starting grain size of sediment. The formulas, by which the closest results can be achieved compared with the measured data, could be chosen for estimating the sediment gradation, sediment transporting rate and other parameters. A useful way to determine the sediment size for the river without measured data can be obtained by similar river modeling.