摘要
在归纳总结浅滩形成条件的基础上,提出长江中游浅滩分类指标,并分析不同类型浅滩分布特征及碍航程度,结果表明:长江中游浅滩形成须具备放宽的平面外形、可动的河床边界以及水动力条件相对减弱三个基本条件,依据放宽率和边界可动性可将长江中游浅滩分为三个类型,其中II型浅滩分布范围最广,I型和III型分别仅分布在单一和分汊河道中,碍航程度III型>II型>I型。
This paper describes classification indicators for the shoals in the middle Yangtze based on generalization of the shoals forming conditions, and analyzes the distribution of different shoals and their obstruction to navigation. Results show three basic conditions necessary for shoals formation in this reach： enlargement of river channel, movable bed boundary, and change of local hydrodynamic condition. We adopt channel widening rate and riverbed boundary mobility as two parameters to divide the shoals in the middle Yangtze into three categories, namely, type I, II, and III. Shoals of type II are widely distributed while those of type I and III are found only in single channel and braided channel reaches respectively.
出处
《水力发电学报》
EI
CSCD
北大核心
2014年第2期146-153,共8页
Journal of Hydroelectric Engineering
基金
国家"973"项目课题"长江中游通江湖泊江湖关系演变过程与机制"(2012CB417001)
国家自然科学基金(51009109)
交通运输重大科技专项-黄金水道通过能力提升技术(2011-328-548-50
2011-328-224-30)
关键词
河流泥沙工程学
浅滩
放宽率
边界可动性
碍航
river sedimentation engineering
shoals
widening rate
boundaries mobility
obstructing navigation
