简述了影响潮间带红树林湿地的环境水文地质因素，报道了海南东寨港红树林湿地保护区红树林剖面和光滩剖面的沉积结构、水动力特征以及地下水水文地球化学性质。监测结果显示红树林剖面潮间带的pH和ORP值整体上要大于光滩剖面，而其TDS值则小于光滩剖面；红树林潮间带浅层水质的变化范围要大于其深层水质，而光滩剖面浅部与深部的水质相近。分析表明:2个剖面潮间带土壤的性质和所处的潮汐环境类似，不同之处是光滩剖面无内陆淡水补给，因而缺少适合红树林生长的咸淡水交换动态环境。该结论有助于理解影响潮间带红树林湿地的环境水文过程，对红树林湿地的保护和管理有一定的科学指导意义。

This paper briefly reviews the environmental and hydrogeological factors influencing the tidal mangrove marshes. The characteristics of sedimentation structure, hydrodynamics and groundwater hydrogeochemistry in Dongzhaigang Mangrove Marsh are presented for two transects: one is a mangrove marsh, the other is a bald beach. Field measurements show that pH and ORP in the mangrove transect are generally higher than those in the bald beach transect, while the former’s TDS is lower than the latter’s, and that the variation scope of shallow water quality is greater than that of deep water quality in the mangrove transect, while it is very little in the bald beach transect. Further analyses indicate that both transects are subject to the same tidal action and have the same tidal environment. The difference between the two transects is the inland freshwater recharge conditions. Along the mangrove transect, there is significant freshwater from inland. We conclude that the bald beach not to be covered by mangrove plants is due to the lack of freshwater and saltwater recharge envionrment to be suitable to mangrove growth.