中文摘要：

海底的地下水分泌物(SGD ) ，从陆上、海洋的起源由地下水流动组成，是到沿海的水的营养素，沾染物，和另外的化学药品的重要来源，并且在沿海的环境和生态学上有重要影响和含意。这篇论文在确定考察最近的进展在各种各样的沙滩含水土层的导致潮的 SGD 在全世界借助于数学建模，实验室实验，和领域观察或他们的联合。众多的研究证明了( 1 ) SGD 的数量级在全世界由镭估计同位素 tracers 典型地从海岸线的 102～103 m3 d1 m1 ，( 2 ) SGD 主要具有海洋的起源，即越过含水土层海接口的 re-circulated 海水，并且( 3 )潮是驾驶海水地下水循环的主要力量之一。对从在文学报导的沙滩含水土层的 SGD 的潮汐的贡献的数量级仅仅是海岸线的 10 m3 d1 m1 长度，比镭同位素 tracers 估计的全部的 SGD 小至少一个数量级。这显然在矛盾与(3 ) 。矛盾可以包括的为这的可能的原因(1 ) 海岸线长度的低估由于忽视潮汐的河的许多水中突出的陆地，海湾和河岸，并且(2 ) 从从 nearshore 区域到大陆人架的海床的海水地下水交换的疏忽。进一步的研究被需要关于矛盾理解更多。

英文摘要：

Submarine groundwater discharges （SGD）, consisting of groundwater flow from both terrestrial and marine origins, is an important source of nutrients, contaminants, and other chemicals to the coastal waters, and has significant impacts and implications on coastal environment and ecology. This paper reviews the recent advances in quantifying the tide-induced SGD in various beach aquifers around the world by means of mathematical modeling, laboratory experiments, and field observations or their combinations. Numerous studies have shown that （1） the order of magnitude of SGD around the world estimated by radium isotope tracers typically ranges from 102 to 103m3d-1m-1 of the shoreline, （2） SGD is mainly of marine origin, i.e. the re-circulated seawater across the aquifer-sea interface, and （3） tide is one of the major forces driving seawater-groundwater circulation. The order of magnitude of the tidal contributions to SGD from beach aquifers reported in the literature is only 10m3d-1m-1 length of shoreline, at least one order of magnitude smaller than the total SGD estimated by radium isotope tracers. This is obviously in contradiction with （3）. The possible reasons for this contradiction may include （1） underestimation of the shoreline length due to neglecting many headlands, bays and banks of tidal rivers, and （2） negligence of the seawater-groundwater exchange from the seabed ranging from the nearshore areas to the continental shelf. Further research is needed to understand more about the contradiction.