分析了1958~2005年不同时期长江口南港及南北槽分汊口的河床形态特征，以及河床U形断面与W形断面的相互转化。
The riverbed form in different periods from 1958 to 2005 of the South Channel and the South-North-Passage bifurcation and the cross-section transformation between U-shape and W-shape are analyzed.
论证了在长江口河势还存在不稳定因素的情况下， 南港北槽入海航道可整治的技术可行性。
The paper demonstrates the technical feasibility of regulating the north passage of the south channel under the circumstances of existing unsteady factors in the regime of the Yangtze Estuary.
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