| Daguangba Dam | |
| Name Official: | 广坝农场 |
| Location Map: | Hainan#China |
| Location Map Caption: | Location of Daguangba Dam |
| Coordinates: | 19.0194°N 108.9794°W |
| Country: | China |
| Location: | Dongfang |
| Status: | O |
| Construction Began: | 1990 |
| Opening: | 1995 |
| Cost: | US$197.5 million |
| Owner: | Hainan Provincial Electric Power Company (HEPCO) |
| Dam Type: | Concrete gravity/Embankment |
| Dam Height: | Concrete section: 570NaN0 Embankment:440NaN0 |
| Dam Length: | Concrete section: 7190NaN0 Embankment:51230NaN0 Total:58420NaN0 |
| Dam Volume: | Concrete section: 8600000NaN0 Embankment: 78000000NaN0 |
| Dam Elevation Crest: | Concrete section: 1440NaN0 Embankment:1450NaN0 |
| Dam Crosses: | Changhua River |
| Spillway Type: | Controlled, 16 radial gates |
| Spillway Capacity: | 355640NaN0 |
| Res Capacity Total: | 17100000000NaN0 |
| Res Capacity Active: | 13150000000NaN0 |
| Res Catchment: | 34980NaN0 |
| Res Elevation: | 1400NaN0 |
| Plant Commission: | 1993–1995 |
| Plant Turbines: | 4 x 60 MW Francis-type |
| Plant Capacity: | 240 MW |
The Daguangba Dam is a multi-purpose dam on the Changhua River in Hainan Province, China. It is located 350NaN0 east of Dongfang. As the primary component of the Daguangba Multipurpose Project, the dam was constructed between 1990 and 1995. It serves to provide water for both hydroelectric power generation and agriculture. It supports a 240 MW power station and supplies water for the irrigation of 127000NaN0. It is also the largest dam and hydroelectric power station in Hainan.
Preliminary construction (roads, bridges, river diversion) on the project began in March 1990. On 29 December 1993, the first generator was commissioned, with the second and third in 1994. On 29 March 1995, the fourth and last generator was commissioned. In June 1995, the concrete portion of the dam was poured to its design height. In December of that year, the entire power station was placed into commercial operation. In November 1996, the reservoir was full. The project also includes the 160NaN0 long Head Main Canal which connects to a designed network of 1540NaN0 of branch and lateral canals. Approximately 23,800 people were relocated because of either the reservoir or irrigation works. Of the project's US$197.5 million cost, US$67 million was funded by the World Bank.[1]
The Daguangba Dam consists of a concrete gravity section flanked by two homogeneous earth-fill embankment dam sections. The gravity dam lies over the river and is 570NaN0 high with a length of 7190NaN0. The embankments have a maximum height of 440NaN0 and combined length of 51230NaN0. The total length of the entire dam is 58420NaN0, making it one of the longest in China. The volume of concrete (including roller-compacted concrete) in the gravity dam is 8600000NaN0 while the embankments have a fill of 78000000NaN0. It is the largest dam in Hainan Province.[2] The reservoir withheld by the dam has a storage volume of 17100000000NaN0. Of that volume, 13150000000NaN0 is active (or "useful") volume. The spillway is located on the gravity section and is controlled by 16 radial gates. Its maximum discharge is 355640NaN0. The dam's power station is located on the right side of the gravity section and contains four 60 MW Francis turbine-generators for a total installed capacity of 240 MW. It is the largest hydroelectric power station in Hainan.[3] [4] [5]