Classification of Marine Environment in Ise Bay by Statistical Methods

Abstract

Several statistical approaches (pattern analysis, cluster analysis, and ratio matching) were applied for classification of marine environmental quality of ISE bay based on similarity among data on sea water parameters (W. T., pH, DO, COD, Sal., DIN, PO₄-P, and chl-a) collected during march, 1977 through March, 1979.
Presence of two typical water masses having similar marine environmental quality were found from these analyses.
One water mass which showed relatively independent quality upon seasonal and yearly fluctuations occupied a larger area from the coast line of Tokoname-Noma to the center of the bay.
The other one which showed seasonal and yearly fluctuations occupied only small area along the cosat of Mie. Moreover, the regions determined to have marine environmental quality by the ratio of matching method coincided relatively well with the regions where red tide occurred.