Analysis on the Eutrophication Features of Wuliangsu Lake during Icebound Period

With Wuliangsu Lake as a research object,the concentration of eutrophication indexes in the ice and water and their spatial variability in Wuliangsu Lake were analyzed,which concluded that Wuliangsu Lake was eutrophic during the icebound period.The eutrophic index in water was larger than that in ice.The contents of COD,TN and TP in water were 1.65,1.61 and 1.78 times that in ice.The residual nutrient variability in water was smaller than that in ice,indicating that the cryopreservation process had certain concentration effect on pollutants in water.The study proposed a research direction for the eutrophication treatment of Wuliangsu Lake.