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本文根据１９７５～１９８２，１９８７～１９９０年东海海洋调查、１９８２～１９８３年上海市海岸带海洋水文调查和１９８８～１９８９年长江口河口锋调查资料，分析了高盐水入侵长江口外的特征和规律，结果表明，高盐水入侵边界的多年平均位置与长江水下三角洲的东边界大致一致，入侵长江口外的高盐水主要源于台湾暖水，冬季尚有黄海混合水入侵的迹象。文中还探讨了高盐水的入侵机理，并阐述了高盐水入侵对入海泥沙输移和长江水下三角洲的发育起着控制作用。
Based on the survey of the East China Sea from 1975 to 1982 and from 1987 to 1990, the ocean hydrological survey of Shanghai coast from 1982 to 1983 and the survey of the mouth of the mouth of the Yangtze Estuary from 1988 to 1989, the characteristics and laws of the high saltwater intrusion outside the Changjiang Estuary were analyzed. The results It shows that the average position of high salt water invaded by the border is roughly the same as the eastern boundary of the Yangtze River Delta. The high salt water that invaded the Changjiang Estuary mainly came from the warm water in Taiwan, while the winter mixed water invaded the Yellow Sea. The paper also discusses the mechanism of intrusion of high salinity water and expounds that salty water intrusion plays a controlling role in sediment transport to the sea and the development of the Yangtze River Delta.