Tongsha Reservoir. Tongsha Reservoir is located in Dongguan City, Guangdong Province, 8.5 kilometers southeast of Dongcheng Street Office Tongsha Village. Catchment area of 100 square kilometers. Total reservoir capacity of 65.2 million cubic meters. Songshan Lake controls an area of 72 square kilometers. Sitting on 8 square kilometers of freshwater lake and 14 square kilometers of ecological green space, is a demonstration of significance in the country, the harmony between man and nature **** existence of science and technology new city. In comparison, Tongsha Reservoir is larger than Songshan Lake.