The wetland of Yangtze River estuary has played an important role in economic development of Shanghai for a long time.However,due to the rapid economic development in recent years,the ecological characteristics of wetland ecosystem have changed greatly and the recession has been serious.Based on the data of satellite imagery and field investigation,the uplift and erosion changes of four main wetland resources in Yangtze River estuary are analyzed.The results show that,(a) in addition to the Hengsha Dongtan,the south banks of the beach are all converted into erosion,the beach wetlands are generally trended to erosion and the wetlands continue to degenerate;and (b) the main reason for the degradation of wetland is the decrease of the amount of sediment in the basin,the increasing intensity of artificial beach,and the influences of global climate change and sea level rise.Aiming at the problems existing in the wetland of Yangtze River estuary,a series of related measures are put forward for providing references to the rational exploitation and utilization of tidal flat resources and to promote the further healthy development of wetland.%长江口滨海湿地长期以来对上海市经济发展起着重要作用,但近年来,湿地生态系统生态特征发生巨大变化,呈严重衰退趋势.基于卫星影像数据及实地调查等资料,分析其资源淤涨和侵蚀的变化显示,除横沙东滩外,崇明东滩、九段沙、南汇边滩都转为侵蚀,边滩湿地总体转为侵蚀趋势明显,湿地不断退化;导致湿地退化的主要原因为流域来沙量不断减小、人工围滩造地强度不断加大及全球气候变化及海平面上升的影响.为此提出相关措施,以期解决长江口湿地存在的问题,为滩涂资源的合理开发利用提供参考,促进湿地的进一步健康发展.
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