非均匀悬移质输沙过程概化模型

General model of non-uniform suspended load transport

对非均匀悬移质输沙过程进行了系统描述,建立了非均匀悬移质输沙的概化模型。讨论了概化模型的两种理想过程的解,基于实测数据对解式进行了验证,结果表明概化模型是合理的。指出了一类挟沙能力计算公式存在的问题,总结了非均匀沙实际输沙过程的一般规律。要揭示非均匀悬移质输沙机理,不仅要准确计算均匀沙平衡输沙的挟沙能力,而且应探求浑水中不同粒径泥沙自身的运动特性和颗粒间的相互影响。

The paper gives a systematic description of non-uniform suspended load transport and presents a general model which is fit for non-uniform suspended load transport.The validation of the model based on measured data shows that the model tallies with the actual situation.After pointing out some defects of a kind of sediment carrying capacity formulas,a summary of the laws of non-uniform suspended load transport is given.To reveal the mechanism of non-uniform suspended load transport,not only the accurate calculation of uniform sediment carrying capacity,but also the exploration of both the characteristics of motion of different size sediment particles and the mutual influence among them in the muddy water are necessary.