对长江口北槽分流比的分析研究

Research on bifurcation ratio in the North Passage of Yangtze Estuary

指出长江口汊道分流比概念与平原河流的不同,分析治理工程以来北槽落潮分流比减小的主要原因。根据对北槽河槽容积和断面落潮量变化的具体分析,得出"迄今为止北槽分流比的减小是可以接受的"结论。

Different definitions of ＂bifurcation ratio＂ for the plain river reach and for Yangtze Estuary are stated, and the main causes for the decrease of bifurcation ratio at ebb tide in North Passage after implementation of the regulation engineering are analyzed. Based on the analysis of the variation of channel-fill volume and cross-sectional ebb discharge of the North Passage, the conclusion that ＂the decrease of the bifurcation ratio in the North Passage is acceptable up to now＂ is drawn.