中文摘要：

海陆界面水体相互作用研究是当代国际海岸带生态水文学的热点。滨海湿地的生态水文环境脆弱，浅层地下水及盐度梯度变化对其生长和发育起着控制作用。咸水冲淡驱动力主要是地下水动力作用、盐度驱动下的水化学运动作用和海洋潮汐作用的叠加效应。通过国内外学者近30年的研究成果分析了滨海湿地咸水冲淡研究程度及进展情况，认为掌握咸水冲淡驱动机理及水盐运移行为，对于合理选择相应有效的滨海湿地保护和水文修复措施是十分重要的。国际上已有的相关研究较多，而国内相关研究相对较少。

英文摘要：

The interaction between sea and land is the ents of shallow groundwater and brackish water in key to coastal eco-hydrological study. The gradi- sediments are critical to coastal eco-hydrological vulnerability. The desalination of brackish water is driven by the joint action of groundwater dynam- ics, hydrogeochemical differentiation and tidal process. The research progress on the mechanism of brackish water desalination in delta wetland was discussed in this paper. In order to restore the hydro- logical conditions, it is required to take effective protective measures in accordance with the mecha- nism of the brackish water desalination and the movement of shallow groundwater.