Nutrient inputs through submarine groundwater discharge to Ariake Bay, Kyushu Island, Japan

Jun Yasumoto, Mamoru Katsuki, Hidetomo Takaoka, Yoshinari Hiroshiro, Kenji Jinno

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationIAHS-AISH Publication - A New Focus on Groundwater - Seawater Interactions
Pages159-168
Number of pages10
Edition312
Publication statusPublished - 2007
EventInternational Symposium: A New Focus on Groundwater - Seawater Interactions - 24th General Assembly of the International Union of Geodesy and Geophysics (IUGG) - Perugia, Italy
Duration: Jul 2 2007Jul 13 2007

Other

OtherInternational Symposium: A New Focus on Groundwater - Seawater Interactions - 24th General Assembly of the International Union of Geodesy and Geophysics (IUGG)
CountryItaly
CityPerugia
Period7/2/077/13/07

All Science Journal Classification (ASJC) codes

  • Earth and Planetary Sciences(all)

Fingerprint Dive into the research topics of 'Nutrient inputs through submarine groundwater discharge to Ariake Bay, Kyushu Island, Japan'. Together they form a unique fingerprint.

  • Cite this

    Yasumoto, J., Katsuki, M., Takaoka, H., Hiroshiro, Y., & Jinno, K. (2007). Nutrient inputs through submarine groundwater discharge to Ariake Bay, Kyushu Island, Japan. In IAHS-AISH Publication - A New Focus on Groundwater - Seawater Interactions (312 ed., pp. 159-168)