海底地下水排放:重要的海岸带陆海相互作用过程

沿海地区海底地下水排放在北美和欧洲等发达地区受到了越来越多的重视,被认为是一个重要的海岸带陆海相互作用过程。但这一过程在我国尚未引起足够认识,有关研究极少见。海底地下水排放的研究历史不长,只是近十多年才有了快速的发展,有了越来越多的定量研究成果。其研究方法主要有水文计算法、现场实测法和地球化学示踪法,各种方法之间的对比实验是目前的热点问题。沿海地下水排放具有重要的环境意义,它可以是陆地营养物质和污染物质的一个重要排放通道,可以对海岸带环境产生一定影响。我国沿海地区应该加强有关的研究工作,为海岸带环境管理作出贡献。

Submarine groundwater discharge: An important land-ocean interaction in the coastal zone

Submarine groundwater discharge (SGD) is recognized as an important land-ocean interaction in the coastal zone in developed areas, such as North America and Europe. However, it is ignored and seldom studied in China. The history of SGD studies spans about 10 years. Nevertheless rapid advances have been achieved with numerous quantitative results. Three methods are mainly used to estimate SGD, i.e. hydrological calculation, in-situ measurement, and geochemical tracing. Comparisons among these different methods are highly regarded in present studies. SGD is of great significance for coastal environments. It can be a pathway of land nutrients and pollutants to the coastal ocean, and thus exert some influences on water quality. It is thought that SGD should be studied in detail in China because of its long coastal line, which can contribute much to the coastal environmental management.