The paper presents recommendations for using the results obtained in sediment transport simulation and modeling of channel deformations in rivers. This work relates to the issues of empirical modeling of the water flow characteristics in natural riverbeds with a movable bottom (alluvial channels) which are extremely complex. The study shows that in the simulation of sediment transport and calculation of channel deformations in the rivers, it is expedient to use the calculation dependences of Chézy’s coefficient for assessing the roughness of the bottom sediment mixture, or the dependences of the form based on the field investigation data. Three models are most commonly used and based on the original formulas of Meyer-Peter and Müller (1948), Einstein (1950) and van Rijn (1984). This work deals with assessing the hydraulic resistance of the channel and improving the river sediment transport model in a simulation of riverbed transformation on the basis of previous research to verify it based on 296 field measurements on the Central-East European lowland rivers. The performed test calculations show that the modified van Rijn formula gives the best results from all the considered variants.

中文翻译：

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冲积河道中的泥沙输运和水流阻力：非均匀粒度泥沙输运的修正模型

本文提出了使用泥沙输运模拟和河流河道变形建模中获得的结果的建议。这项工作涉及对极其复杂的具有可移动底部（冲积河道）的天然河床中的水流特性进行经验建模的问题。研究表明，在河流泥沙输运模拟和河道变形计算中，利用Chézy系数的计算相关性来评估底部泥沙混合物的粗糙度，或基于场的形式的相关性是有利的。调查数据。三种最常用的模型基于 Meyer-Peter 和 Müller (1948)、Einstein (1950) 和 van Rijn (1984) 的原始公式。这项工作涉及评估渠道的水力阻力并在河床转换模拟中改进河流泥沙输运模型，以在前人研究的基础上进行验证，以基于对中东欧低地河流的 296 次实地测量进行验证。执行的测试计算表明，修改后的 van Rijn 公式给出了所有考虑的变体的最佳结果。