An Analysis of Beishi River’s Environmental Status and Dominant Factors

To understanding the environmental factors and water conditions,the study of ongoing bioremediation polluted Beishi River in Changzhou as the research objective is carried out.And 180 water samples from November 2011 to October 2012 were collected and analyzed,which showed that the water in Beishi river is alkaline,dissolved oxygen content is low,content of nitrogen and phosphorus is high,organic pollution is serious,water index perennially belongs to inferior class V,and the water environmental status is not optimistic.According to the analysis of the principal component,the main influencing factors of controlling the water quality of Beishi river are NO-3-N,NH+4-N,TP and Chl-a.