Abstract
In order to investigate the quantitative change, the quality change and the distribution of dissolved organic matter (DOM) in Toyama Bay, water samples from 7 stations in the coastal area, one station at the center in the bay, one station out of the bay and its inflowing two rivers were taken from September, 2003 to March, 2005. The filtered organic matter was fractionated into hydrophilic and hydrophobic bases (Hi+HoB), hydrophobic acids (HoA) and hydrophobic neutral (HoN) components by DAX-8 resin.
The concentration of DOM component in the bay tended to be high in summer and low in winter. The concentrations of DOM in two river waters did not show clear seasonal changes. In the coastal and central sampling points, the DOM concentrations had positive correlations with water temperature and chlorophyll-a concentration. The results suggested that internal production in the bay greatly contributed to the seasonal change of DOM concentration.
