Beidagang Reservoir is a large reservoir in southern Tianjin built between 1974 and 1980. It is the only large reservoir on the route of the Yellow River-Tianjin water transfer project. It serves as the water supply reservoir to the downtown of Tianjin and surrounding industrial and agricultural areas. The wetland around the reservoir is registered as a protected wetland of China. ^[1][2]

Beidagang Reservoir
Beidagang Reservoir
Location	Dagang District, Tianjin
Coordinates	38°44′41″N 117°20′15″E / 38.74472°N 117.33750°E / 38.74472; 117.33750
Type	reservoir
Primary inflows	Duliujian River (artificial branch of Hai River)
Catchment area	1,170 km2 (500 sq mi)
Basin countries	People's Republic of China
Max. length	26 km (20 mi)
Max. width	11 km (7 mi)
Surface area	149 km2 (60 sq mi)
Average depth	7 m (20 ft)
Water volume	436,000,000 m3 (2×1010 cu ft)
Shore length1	54.5 km (30 mi)
1 Shore length is not a well-defined measure.