VAROSA DAM |
|
PURPOSE - Hydroelectric | |
LOCATION | GENERAL FEATURES |
District -
Viseu Municipality - Lamego Site - Almacave River Basin - Douro River - Varosa river |
Promoting entity
- HDN, Energia do Norte, SA Owner - HDN Engineering by - J.P. STUCKY Construction by - SOMAGOPE Year of completion - 1976 |
HYDROLOGY | RESERVOIR |
Mean annual
rainfall - 1 500 mm Mean annual runoff - 345 120 x 1 000 m3 Flood runoff - 1 200 m3/s Return period - 1 000 years |
Reservoir area - 700
x 1 000 m2 Gross capacity - 12 943 x 1 000 m3 Effective storage - 12 937 x 1 000m3 Normal water level (NWL) - 264 m Maximum flood level (MFL) - 265 m |
DAM | |
Concrete - Arch
dam Height above streambed - 76 m Crest elevation - 265 m Crest length - 213 m Crest width - 3,44 m Foundation - Granite Volume of dam body - 81 x 1 000 m3 |
|
SPILLWAY | BOTTOM OUTLET |
Location -
Right bank Control type - Controlled Spillway type - Chute spillway Sill elevation - 253 m Sill length - 17,25 m Number of gates - 3 radial gates Maximum discharge - 1200 m3/s Energy dissipation - Flip bucket |
Location -
Thalweg Type - Through the dam Section - 0,90 x 1,20m Upstream control - Yes Downstream control - Yes |
POWER PLANT | |
Type - Outdoor
reservoir Number of installed units - 3 Type of units - Francis Power installed capacity - 24,7 MW Mean annual energy output - 60 GWh |