摘要
本文根据该河段在1962年、1963年及近几年的河床演变观测资料,对该河段的水流运动、悬移质输沙、沙质和卵石推移质的输移等方面进行了分析,得到该河段的冲淤变化与其来水过程、水流结构和水流挟沙能力的次饱和程度等的相互关系。并根据该河段的冲淤演变规律,对三峡水库采取“蓄清排浑”顺应川江河道演变规律的运用方式进行了分析。
The Chouyanji reach situated at the entrance of the world-famous Three Yangtze Gorges is in a significant backwater zone. Sediments deposited in flood season may be scoured away during falling flood stage, so that a equilibrium of erosion and deposit would be reached around a year.On the basis of bed development data observed in the years from 1962 to 1963 and over the years, this paper analyzes the flow movement, sediment transport in suspension and transportation of sandy and gravel bedloads, etc, to have a knowledge of relating reach's change in erosion and deposit to its subsaturability of the incoming water process, water-flow structure and sediment-carrying capacity. Finally, the conclusion is that the operating scheme on 'storing clean water and discharging turbid current' in the Three Gorges Reservoir conforms to laws of bed development in this reach.
出处
《长江科学院院报》
CSCD
北大核心
1990年第4期35-44,共10页
Journal of Changjiang River Scientific Research Institute
关键词
河道
演变
库尾
yong水
挟沙
entrance zone of a reservoir, bed development, damming, sediment-carrying capacity
