摘要
根据河势河相关系 ,运用河流动力学原理结合地形图套绘分析了黑龙江干流上中游 9处大型汊道分布及其演变特点。分汊性河道汊道兴衰主流变化主要控制因素有以下 3个方面 :(1)分汊口上游主流顶冲方向和分汊口前江道两岸冲淤情况 ;(2 )汊长比是分汊江道兴衰的基本条件 ;(3)汊道顺直程度 ,河床质组成及两岸植被情况。
There are nine mainframe offshoots in the mainstream of Heilongjiang river. It's distribution and variating characters have been studied and analyzed by the theory of river kinetics and comparison of different time terrain graph in this paper. There are three main controling factor as the following for the development and degeneration of offshoots and the variation of mainstream. The first is the direction of the mainstream flowing and the swilling circumstance of the two bank in the offshoots. The next is the ratio between the curve length and the straight length of the offshoots is the basic condition for the development and degeneration of offshoots. The last is the geological made up of the river basin, the vegetation of the two bank and whether the offshoots is straight or not.
出处
《水利科技与经济》
2002年第1期12-14,共3页
Water Conservancy Science and Technology and Economy
关键词
黑龙江干流
汊道岛屿
变动分析
河相关系
Heilongjing River
island and offshoot
analysis for the mainstream variation
