Gaoyou Lake（Chinese: 高邮湖; pinyin: Gāoyòu Hú）is the sixth largest freshwater lake in China, it is located between Anhui Province and Jiangsu Province. In a sense Gaoyou Lake is a manmade lake, and its creation is part of a long story about flood control and hydraulic engineering in ancient China. Gaoyou Lake is now part of the Huai River system as the Huai River flows south through Gaoyou Lake on its way to the Yangtze River and the Pacific. It is about 39 km long and 30 km wide, covering approximately 674.7 km2.
|Max. length||39 km (24 mi)|
|Max. width||30 km (19 mi)|
|Surface area||674.7 km2 (300 sq mi)|
|Average depth||1.44 m (5 ft)|
|Max. depth||2.4 m (8 ft)|
|Water volume||971.6×106 m3 (34.31×109 cu ft)|
|Surface elevation||5.7 m (19 ft)|