摘要
20世纪70年代以来,长江口南支河势呈现出良好的规律性变化,形成了自身相对稳定的演变模式。这种演变模式的构成既与南支边界条件的改变密切相关,也受上游下泄水沙的影响。以历年地形和水沙资料为基础,详细分析南支沙体与沙体之间、沙体与主槽之间的演变规律及影响关系,阐述上游水沙变化和周边工程对南支河势演变进程的影响,并对南支河势的演变模式作探讨性概括。
Since the 1970s,it has been a relatively-stable evolution pattern in the south branch at Changjiang estuary,where the evolution is well regular.The pattern＇s formation relates to the boundary conditions of the south branch and the flow and sediment into the south branch.Based on the topographical data and the runoff and sediment characteristics over the years,first of all we expatiate on the evolution regulation of the south branch and the interaction between the sand bodies and the channel;then we analyze the influence from the artificial engineers and the runoff and sediment;and lastly,we generalize the river channel evolution pattern.
出处
《水运工程》
北大核心
2012年第1期93-98,共6页
Port & Waterway Engineering
关键词
长江口南支
演变模式
河势分析
south branch of Changjiang estuary
evolution pattern
river regime analysis
