中文摘要：

近年来随着人类干预力度的加大，长江口河道演变趋势出现了较大的变化。本文以大量实测资料为基础，在分析河道变化新趋势的基础上，对长江口近期河道水文、地形变化及河道演变特征进行了分析和探讨。研究成果表明，受人类活动的影响，长江口河道整体稳定性有所提高；水域内不同区域间的水沙交换强度仍较大；随着人类对河道干预力度的加强，防冲刷已成为一个突出的问题。

英文摘要：

The estuary of the Yangtze River channel evolution situation has changed obviously in recent years with the increasing intensity of human intervention. Based on field observed data and analysis of river channel changes in the new situation, preliminary analysis and discussion are provided on characteristics of the mouth of the Yangtze River Hydrology, topography and river channel evolution. Results show that the stability of Yangtze River mouth has improved under the new situation; the exchange strength of water and sediment in- creased between different areas ; scour has become a prominent problem with the enhanced of human interven- tion.