河道分流分沙计算模式研究进展

根据分流河道的水沙特性,对现有的分流分沙计算模式进行了分类。总结河道分流分沙计算模式在国内外研究发展的现状并进行了简要的分析评论,指出计算模式的发展在充分考虑分流口口门附近水流结构和含沙量沿垂线分布等特性的前提下,还应借助原型资料与理论分析、室内试验及数值模拟等多种手段综合研究分流河道分流分沙的变化规律,才能为分流河道的合理整治提供科学的依据。最后就分流分沙计算模式研究的几个亟待深入的课题略陈管见。

Advances in research of computational models for flow and sediment diversion in river channels

Based on the water-sediment characteristics in braided channels, the computational models current used for flow and sediment diversion were classified, and their development at home and aboard was briefly summarized. It is pointed out that, in addition to full consideration of the characteristics of flow structures and vertical distribution of the sediment concentration near the diversion entrance, the development of the computational models should take the results of prototype observation, theoretical analysis, laboratory test, and numerical simulation, etc. into account for comprehensive study of the regularity of flow and sediment diversion in river channels, so that the result can provide a scientific basis for reasonable regulation of braided channels. Finally, some ideas about problems to be further studied were presented.