Abstract
The seabed environments were investigated at 20 stations located in the northern area of Ariake Sea in July 2004. The spatial distributions of sediment characteristics and nutrients in porewater were obtained. It is found that the area where the acid volatile sulfides (AVS) content exceeds 0.2mg/gdry spreads along the west coast, and the seabed conditions in the area are bad. The concentrations of dissolved inorganic nitrogen (DIN) in porewater increase from the southwest to the northeast, and the concentration of phosphate (PO4-P) takes the reverse distribution. The spatial distributions of nutrients seem to depend strongly on the process of adsorption and desorption of PO4-P and the process of nitrification and denitrification of DIN.
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