上海芦潮港岸滩冲淤动态及原因探究

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。

Study on erosion-siltation behavior and cause of Luchaogang Shore,Shanghai

The discontinuity character of development of the Nanhui Spit is described on the basis of both historical change of the northern coastline of Hangzhou Bay and seawall history of the Nanhui county'Alternate erosion or siltation that transfers from east to west along the Luchanogang sector which is near the tip of Nanhui Spit in recent fifty years.It is the sway of Yaotou Sand that induces turn of erosion-siltation of the Luchaogang shore. However, the basic cause should be traced back to the changing circumstance of the Changjiang estuary. Pointing out two events of situation change in the Changjiang estuary which are development of the north channel and the Southern Jiangya Waterway, this paper analyzes the influence of the Changjiang estuary on the behavior of the Luchaogang shore.