IDANHA DAM |
|
PURPOSE - Irrigation / Hydroelectric | |
LOCATION | GENERAL FEATURES |
District -
Castelo Branco Municipality - Idanha-a-Nova Site - Cabeço Monteiro River Basin - Tejo River - Ponsul river |
Promoting entity
- IHERA Owner - Associação de Regantes e Beneficiários de Idanha-a-Nova Engineering by - JAOHA Construction by - Virgílio Preto, JAOHA Project year - 1935 Year of completion - 1947 |
HYDROLOGY | RESERVOIR |
River basin area
- 359 km2 Mean annual rainfall - 707 mm Mean annual runoff - 91526 x 1000 m3 Flood runoff - 700 m3/s |
Reservoir area -
6780 x 1000m2 Gross capacity - 78100 x 1000m3 Effective storage - 77300 x 1000m3 Dead storage - 800 x 1000m3 Normal water level (NWL) - 255,5 m Maximum flood level (MFL) - 258,5 m Minimum operating level - 228 m |
DAM | |
Concrete - Gravity
dam Height above foundation - 51 m height above streambed - 44 m Crest elevation - 258,5 m Crest length - 143 m Crest width - 5,2 m Foundation - Granite Volume of dam body - 66 x 1000 m3 |
|
SPILLWAY | BOTTOM OUTLET |
Location - Left
bank Control type - Uncontrolled Spillway type - Shaft spillway Sill elevation - 255,5 m Sill length - 80 m Maximum discharge - 700 m3/s Energy dissipation - Inexistent |
Location - Thalweg Type - Through the dam Section - 2 x d 1,5 m Upstream control - 2 sluice gates Downstream control - 2 butterfly valves Energy dissipation - Inexistent |
POWER PLANT | |
Type - Dam
toe Number of installed units - 1 Type of units - Francis turbine Mean annual energy output - 4,5 GWh |