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本文从杭州湾北岸历史变迁和上海南汇新老海塘建塘史叙述了南汇嘴发育过程的间歇性特点。位于南汇嘴嘴尖的芦潮港岸滩近５０年也呈现冲淤交替的特征，且冲淤过程由东向西传递。诱发这种冲淤波动的直接原因是摇头沙的偏转，而其根源应追溯到长江口河势的变化。本文以近５０年来长江口的两个事件──北槽和江亚南泓的形成──阐述了它们对芦潮港岸滩动态的影响。
This article describes the intermittent characteristics of the Nanhuizui development from the historical changes of the north bank of Hangzhou Bay and the history of the construction of the new and old seawalls in Nanhui, Shanghai. The Luchaogang shoal located at the tip of Nanhui mouth also shows the characteristics of alternating erosion and silting, and the scouring and silting process is transmitted from east to west. The direct cause of this erosion and deposition fluctuation is the deflection of the head-shaking sand, and its origin should be traced back to the change of the river’s potential at the mouth of the Yangtze River. In this paper, the two events of the Yangtze Estuary in the recent 50 years, the formation of the North Passage and Jiangnan Nanhong, elaborated on their impact on the dynamics of Luchao Harbor.