Relationships between water quality, morphological factors in river basins, the diversity index and the biotic index

Abstract The relationships among water quality, the morphological factors in river basins, the Diversity Index, and the Pollution Index were analyzed by the principal component, using the data obtained from the rivers in Kumamoto Prefecture from 1984 through 1988. The value of the Pollution Index, which was used as a biotic index, correlates with both water quality and morphological factors.