摘要
天然河流修建水库后,下游河道发生的最大变化就是河床冲刷粗化。河床冲刷与粗化的研究在水利、水运、水电工程中有着重大的实际意义,是解决山区及丘陵区水利工程面临的河床冲刷粗化所引起的河床演变的关键问题之一。国内外众多学者专家都对冲刷粗化问题进行过研究,文章意在总结已有枢纽下游河床冲刷粗化的研究成果,包括冲刷与粗化机理、冲刷粗化起动流速计算、粗化输沙率计算、粗化层级配计算、极限冲刷深度计算及冲刷后水位降落计算等。并对现有研究成果进行了简要的述评,为后续对这一问题进行深入研究作出必要的准备。
Results after the reservoir＇s building, the maximum variation was scouring and armoring for river bed downstream reservoir. The study on scouring and armoring for river bed is of significance on water conservancy, water transportation and hydropower engineering. In this paper, the research results including the mechanisms of armoring of river beds, incipient velocity of armoring of river beds, transport rate of bed load in an armoring process, grading calculation for armoring bed materials, scour depth of limit calculation, fall of level at the down reach of dams are summarized.
出处
《水道港口》
2008年第2期106-112,共7页
Journal of Waterway and Harbor
关键词
坝下
非均匀沙
清水冲刷
粗化
综述
in downstream
nonuniform sediment
clear water erosion
armoring
review
