Abstract:

Based on the measurement of nutrients (total nitrogen and phosphorus ect.) and heavy metals (Cu,Pb,Cd and Zn) concentrations in the Poyang Lake,the main river and the Nanjishan Lake,the nutrient status and metal pollution in the Poyang Lake basin were systematically analyzed.The results demonstrated that the content of TN,TP and COD in the surface water of the Poyang Lake basin in October 2010 were relatively high,while the lake had subjected to eutrophication status and the water quality was greatly affected by TN,NH+4N,TP and pH.There were significant spatial differences in nutrient contents.Results further showed that the highest nutrient concentration was in the Rao River and the next was in the Xiu River,while the lowest was in the Nanjishan.The contents of Pb,Cd in the surface water of the Poyang Lake basin were low,which met to the water quality standard for fishery in China,especially the content of Cd was lower than the first evaluation criterion of surface water.However,the Cu and Zn concentration in the Poyang Lake basin were relatively great