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

摘要

Canonical discriminant analysis (CDA) was applied in order to distinguish the water-quality andnthe sediment-quality parameters from neighboring rivers, and to recognize similarities ofnwater and sediment properties between a lagoon and neighboring rivers. Two set of constructedndiscriminant functions showed a marked contribution to most of the discriminant variables.nIn water, the significant parameters – the total nitrogen, algae, dissolved oxygen and totalnphosphate – were combined as the nutrient effect factor. The recognition capacities of the twondiscriminant functions were 95.6 and 4.4%, respectively; the Kaoping River showed the mostnsimilarities with the water quality in Dapeng Bay; in sediment, the significant parameters porosity,nCd, Cr, Al, and Pb were combined as the heavy metal effect factor. The recognition capacitiesnwere 82.6 and 17.4%, respectively, but the sediment properties in these three rivers had nonsignificant similarity with the Dapeng Bay.