Submarine groundwater discharge (SGD) is now recognized as an important pathway between land and sea. This study attempts to estimate the nutrient inputs through SGD to Ariake Bay. SGD rates and its quality along the coast of Ariake Bay in the Oura Region, Japan, were investigated. It was shown that the on-site SGD rate ranges from 0.01 to 20.52 μm/s, and SGD flows through the shallow confined aquifers, which consist of two kinds of rocks: basalt and pyroclastic rocks. The reduction reaction for SGD proceeded just up to denitrification. SGD associated with nutrient loads of N, P and SiO2 were estimated to be 1.40, 0.07 and 52.78 g m-2 d-1, respectively. This study demonstrates that SGD must be considered as a significant source of nutrient input to the coastal sea area in Ariake Bay.
|ホスト出版物のタイトル||IAHS-AISH Publication - A New Focus on Groundwater - Seawater Interactions|
|出版ステータス||出版済み - 2007|
|イベント||International Symposium: A New Focus on Groundwater - Seawater Interactions - 24th General Assembly of the International Union of Geodesy and Geophysics (IUGG) - Perugia, イタリア|
継続期間: 7 2 2007 → 7 13 2007
|その他||International Symposium: A New Focus on Groundwater - Seawater Interactions - 24th General Assembly of the International Union of Geodesy and Geophysics (IUGG)|
|Period||7/2/07 → 7/13/07|
All Science Journal Classification (ASJC) codes