Dianshan Lake is the important protected area cf water resources at the upp-en reaches of Hvsngpu River in Shanghai.However, seme environmental problems such as eutrophication,bacterial contamination and erosion of lake-shore have been brought about due to the improper management of the lake and no attention having been paid to its environmental protecticr. Thus the water in the lake was polluted and its ecological environment wes endangered as well.This artical was written for the purpose of putting forwar...