Guangzhou Dongshan Lake Water Quality Improvement Project
The water area of Dongshan Lake is 335,000 square meters. It is connected to rivers such as Baiziyong and Dongliaochong through the Xinhe Puyong. The surrounding drainage system is mostly confluence of rain and sewage, and the lake is seriously polluted. Dongshan Lake has not been dredged for 16 years, and the sediment is thick. The water quality of Dongshan Lake is inferior. It is inferior to Class V water, and is in a state of severe eutrophication. Among them, total phosphorus and total nitrogen pollution is the most serious, with an exceeding standard rate of 100%; BOD5 pollution is second, and the exceeding standard rate is 37.5%.