Discussion on the Lake Eutrophication and Its Ecological Remediation Technology

China is one of the most serious countries in the world that exist the lake eutrophication.The phenomenon can be found in the middle and lower reaches of Yangtze River,lakes in Yunnan,Guizhou,northeast mountains and plains.Now the lake eutrophication phenomenon is more serious because of more urban wastewater discharge and the development of industry and agriculture.In this paper,causes and hazards of the eutrophication were analyzed,some countermeasures were put forward.Status of the lake eutrophication at home and abroad was introduced as well as related ecological remediation technologies.