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论述了研究地区２１世纪前半期的相对海平面上升幅度．研究结论是，研究地区２０５０年相对海平面上升２５～５０ｃｍ，其中长江三角洲上升幅度较大，高出全球平均值的一倍．海平面上升将产生以下影响：（１）有些岸段侵蚀后退与潮滩下蚀的加剧，侵蚀海岸范围扩大；（２）潮滩与海岸湿地由于侵蚀与淹没而减少；（３）风暴潮频率与强度增加，威胁海岸防护工程的安全；（４）里下河低地与太湖湖东低地排水能力下降，洪涝灾害加剧；（５）长江口盐水入侵加剧．海平面上升影响的综合评估表明：对长江三角洲与太湖湖东低地，特别是上海市的影响最严重，其次是杭州湾北岸，第三是废黄河三角洲，苏北滨海平原与里下河低地的影响最轻。
Discusses the relative sea level rise of the study area in the first half of the 21st century. The study concludes that the relative sea level in the study area increased by 25-50 cm in 2050, with the Yangtze River Delta rising more than double the global average. The sea level rise will have the following impacts: (1) Erosion of some shore sections retreats and erosion of tidal flat intensifies and the coastal erosion area expands; (2) Tidal flat and coastal wetlands decrease due to erosion and inundation; (3) (4) The Lixiahe lowland and the lowland east of Taihu Lake have the lower drainage capacity and flood and flood disasters aggravate; (5) The salt water intrusion in the Changjiang Estuary has intensified. The comprehensive assessment of the impact of sea level rise shows that the impact on the eastern lower reaches of the Yangtze River Delta and Taihu Lake is particularly serious, followed by the north bank of Hangzhou Bay, the third is the Yellow River Delta wasteland, the coastal plain of northern Jiangsu and the lower reaches of Lixiahe The least affected