在河流动床泥沙模型中，如何考虑水沙之间的相互作用，以及在模型动床上如何进行大变态加糙，以满足河流阻力相似，一直是难以解决的两个关键问题。
In the river sediment model with a movable bed , there are two key problems which are how to think about interaction of water and sediment and how to proceed the large distorted roughening to meet resistance similarity .
大糙