长江口外高盐水入侵分析

An analysis of high-concentration-salt water intrusion outside the Changjiang Estuary

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。

According to the oceanographic investigations of the East China Sea from 1975 to 1982 and from 1987 to 1990,the comprehensive survey of the Shanghai coastal zone from 1982 to 1983,and the data of the estuarine fronts in the Changiiang Estuary from 1988 to 1989,this paper intends to analyse the characteristics and regulations of the high-concentration-salt water intrusion outside of the Changjiang Estuary. It is found that the intrusion location for several years coinsides with eastern boundary of the submerged Changjiang delta. There is trend of the Huanghai (Yellow Sea) mixing water intrusion except the Taiwan warm water intrusion.And the paper also discusses the mechanism of the high-concentration-salt water intrusion and its controlling effects on sediments discharged into the seas and on development of the submerged Changjiang delta.