MONTARGIL DAM |
|
PURPOSE - Irrigation / Hydroelectric | |
LOCATION | GENERAL FEATURES |
District -
Portalegre Municipality - Ponte de Sôr Site - Montargil River Basin - Tejo River - Sôr river |
Promoting entity
- IHERA Owner - Associação de Regantes e Beneficiários do Vale do Sorraia Engineering by - DGSH Construction by - Ângelo C. Ramalheira Project year - 1954 Year of completion - 1958 |
HYDROLOGY | RESERVOIR |
River basin area
- 1186 km2 Mean annual rainfall - 825 mm Mean annual runoff - 15500 x 1000 m3 Flood runoff - 1200 m3/s Return period - 500 years |
Reservoir area -
16460 x 1000m2 Gross capacity - 164300 x 1000m3 Effective storage - 142700 x 1000m3 Dead storage - 21600 x 1000m3 Normal water level (NWL) - 80 m Maximum flood level (MFL) - 80,75 m Minimum operating level - 65 m |
DAM | |
Earthfill -
Zoned embankment Height above foundation - 48 m Height above streambed - 36 m Cota do coroamento - 83m Crest elevation - 427 m Crest width - 12 m Foundation - Gabbro and diorite Volume of dam body - 858 x 1000 m3 |
|
SPILLWAY | BOTTOM OUTLET |
Location - Left
bank Control type - Controlled Spillway type - Shaft spillway Sill elevation - 77 m Sill length - 4 x 11,5 m Number of gates - 4 sector gates Maximum discharge - 765 m3/s Energy dissipation - Hydraulic jump |
Location -
Left bank Type - Rock tunnel Section - d 1,5 m Maximum discharge - 36 m3/s Upstream control - Sluice gate Downstream control - Sluice gate Energy dissipation - Hydraulic jump |
POWER PLANT | |
Type - Contiguous
to dam Nº de grupos instalados - 1 Type of units - Francis turbine Mean annual energy output - 5,9 GWh |