长江口北槽优良河势机制

Mechanism of excellent regime of north channel in the Yangtze Estuary

摘要: 长江口南港北槽具有稳定的分流比和相对较小的分沙比。其优良河势的机制在于，北槽与南港主槽衔接顺直，利于水流下泄；南、北槽分流口流场的水动力特征有利于南槽排泄底沙。

Abstract: The regime of the north channel in the Yangtze Estuary is excellent with a stable discharge ratio and a relatively small sand ratio.Because the north channel is favorable to dewatering,joining smoothly to the major channel of Nangang,and the hydrodynamic characteristics of the velocity field in the diversion of the north and south channels are beneficial for the south channel to desilt.