Submarine Groundw Ater Discharge (SGD) In Indonesia


Pulled by gravity. fresh groundwater sill come in contact with seawater at the downstream and of flow system. Most previous work has discussed the shape og the seawater/freshwater interface on the basis of Ghyben-Herzberg's law.
The groundwater, however, will come out to the surface as coastal springs or predicted by the law, the freshwater also can flow out from the bottom of the sea. The event of freshwater flows from the bottom of the sea or submarine is named submarine groundwater discharge (SGD). The analysis shows thar the freshwater flows discharges along the interface, even as a submarine springs. Submarine groundwater discharger (SGD) is now recognized as an important pathway between land and sea. The understanding of SGD will facilitate the development of water resources and the evaluation of environments. This paper reviews the scientific significance of SGD evidence in Indonesia. It is concluded that while the SGD prosess is essentially ubiquitous in Indonesia coastal areas, the assessment of its characteristic should be made base on geology and hydrogeological coundition. SGD estimation has been made in 6 locations, where this kind of research was the first time conducted in Indonesia. Keyword: submarine groundwater discharge, springs, fresh water, coastal, Indonesia. By. Rachmat Fajar Lubis, Hendra Bakti dan Ade Suriadarma