非均匀沙起动的有关问题

本文对非均匀沙起动的有关问题进行了分析和研究。首先分析了非均匀沙的起动机理，指出非均匀起动研究应该考虑荫暴作用，并有必要考虑脉动作用力的影响。通过对各种泥沙起动标准的分析，推荐了联系推移质取样分析或推移系输沙率的定量标准。最后，针对目前研究之不足，试述了非均匀沙起动研究的努力方向。

On the Incipient Motion of Non-Uniform Sediments

In this Paper,analysis and study have been conducted on the relevant problems of the incipient motion of non-uniform sediments. Analyses on the mechanism of the incipient motion of non--uniform sediment indicate that the sheltering effect should be taken into account,and it is also necessary to give consideration to the fluctuating forces of water flow. By analysis of a number of incipient motion criteria,the quantitative criterion for bedload sample analysis or transport rate is recommended. At last,some of research ways to promote the study of the incipient motion law of non--uniform sediments have been proposed.