中文摘要：

通过对长江口口门四大主要湿地的演变分析，认为该区域湿地近30a来依然延续着淤涨态势。崇明东滩宽度变窄，长度增加，但淤涨速率减小，东南角涨潮槽有将湿地分裂的不利趋势；横沙东滩受促淤围垦影响较大，沙尾继续向东南方向延伸；九段沙和南汇东滩均稳定淤涨。分析表明，为尽可能减少滩涂圈围对湿地生态环境可能带来的不利影响，应深入开展长江口湿地生态环境保护专题研究工作，有效指导滩涂资源的合理开发利用。

英文摘要：

Based on the analysis of evolutions of four main wetlands in the Yangtze River Estuary, we believe that the wetlands of this region maintain are in siltation in the past 30 years. The width of the east beach of Chongming Island reduces, and its length increases, however, the siltation rate reduces. The southeast tidal furrow has the disadvantageous tendency to split the beach. The Hengsha East Shoal is significant influenced by cultivation with the sand tail continuously extending to the southeast. Jiuduansha Wetland and Nanhui East Shoal are silted stably. To avoid the negative influence of cultivation among shallow tidelands on wetland ecological environment, special work should be done to protect ecological environment of the wetlands, which would be guidance for reasonable development of tideland resources as well.