The influence of lagoon on neighboring rivers by water and sediment quality

Abstract

Canonical discriminant analysis (CDA) was applied in order to distinguish the water-quality and the sediment-quality parameters from neighboring rivers, and to recognize similarities of water and sediment properties between a lagoon and neighboring rivers. Two set of constructed discriminant functions showed a marked contribution to most of the discriminant variables. In water, the significant parameters - the total nitrogen, algae, dissolved oxygen and total phosphate - were combined as the nutrient effect factor. The recognition capacities of the two discriminant functions were 95.6 and 4.4%, respectively; the Kaoping River showed the most similarities with the water quality in Dapeng Bay; in sediment, the significant parameters porosity, Cd, Cr, Al, and Pb were combined as the heavy metal effect factor. The recognition capacities were 82.6 and 17.4%, respectively, but the sediment properties in these three rivers had no significant similarity with the Dapeng Bay.

Research Methodologies when Verifying Pollution Transportation in Estuary

“…About the issue of pollution of water and sediment quality which neighbouring estuaries and bay areas, besides using pollution transfer models to analyze, we can also use multivariate analyses: factor analysis, cluster analysis, canonical discriminant analysis and canonical correlation analysis to verify [3][4][5][6][7][8]. However, verification of multivariate analysis methods may be affected by factors such as the river between distances, the ocean current or typhoon.…”