BEMPOSTA DAM | |
PURPOSE - Hydroelectric | |
LOCATION | GENERAL FEATURES |
District -
Bragança Municipality - Mogadouro Site - Gardal do Douro River Basin - Douro River - Douro river |
Promoting entity
- CPPE, Cª. Portuguesa de Produção de Electricidade, SA Owner (RSB) - CPPE Engineering by - Hidro Eléctrica do Douro Construction by - MAGOP Project year - 1957 Year of completion - 1964 |
HYDROLOGY | RESERVOIR |
River basin area
- 63850 km2 Mean annual rainfall - 582 mm Mean annual runoff - 3339700 x 1000 m3 Flood runoff - 11000 m3/s Return period - 1000 years |
Reservoir area -
4050 x 1000m2 Gross capacity - 129000x 1000m3 Effective storage - 20000 x 1000m3 Normal water level (NWL) - 402 m |
DAM | SPILLWAY |
Concrete - Arch
gravity Height above foundation - 87 m Crest elevation - 408 m Crest length - 297 m Crest width - 3,5 m Foundation - Granite Volume of dam body - 316 x 1000 m3 |
Location - In
the dam body Control type - Controlled Spillway type - Over the dam Sill elevation - 392,5 m Sill length - 4x24+1x10=106 m Number of gates - 4 radial gates Maximum discharge - 11500 m3/s Energy dissipation - Hydraulic jump |
BOTTOM OUTLET | POWER PLANT |
Location - Right
bank Type - Rock tunnel Section - 4,52x2,0m=9,04m2 Maximum discharge - 200 m3/s Upstream control - No Downstream control - Yes |
Type - Underground Number of installed units - 3 Type of units - Francis Power installed capacity - 210 MW Mean annual energy output - 1086 GWh |