OXYGEN CONSUMPION VELOCITY OF SEDIMENT IN ISAHAYA BAY

Abstract

  The authors sampled undisturbed sediment cores at 22 observation sites in Isahaya Bay in the summer season of 2008 and carried out the laboratory experiments of sediment oxygen consumption. The oxygen consumption velocity in Isahaya Bay ranged from 3.18×10^-3 m/h to1.68×10^-2 m/h, and the averaged value was 9.06×10^-3 m/h. The spatial distribution of the oxygen consumption velocity took the high values off Konagai and it may attribute to the deposition of organic matter derived from phytoplankton. The oxygen consumption velocity was estimated by analyzing the in-situ data of water quality obtained in the centeral area of Isahaya Bay from June to October of 2008 by the Kyushu Regional Agricultural Administration Office. The consumption velocity obtained by analyzing the in-situ data tended to increase with the water temperature.