| ALVITO DAM | |
| PURPOSE - Irrigation / Water supply | |
| LOCATION | GENERAL FEATURES |
| District -
Beja Municipality - Cuba Site - Vila Alva/Vila Ruiva River Basin - Sado River - Odivelas river |
Promoting entity
- INAG Owner (RSB) - Associação de Municípios de Cuba, Vidigueira e Alvito Engineering by - DGSH Construction by- Construções A. Supico, Lda Project year - 1970 Year of completion - 1977 |
| HYDROLOGY | RESERVOIR |
| River basin area
- 212 km2 Mean annual rainfall - 693 mm Mean annual runoff - 40000 x 1000 m3 Flood runoff - 1300 m3/s Return period - 1000 years |
Reservoir area -
14800 x 1000m2 Gross capacity - 132500 x 1000m3 Effective storage - 130000 x 1000m3 Dead storage - 2500 x 1000m3 Normal water level (NWL) - 197,5 m Maximum flood level (MFL) - 198,85 m Minimum operating level - 172 m |
| DAM | |
| Earthfill - Zoned
embankment Height above foundation - 48,5 m Height above streambed - 44 m Crest elevation - 201,6 m Crest length - 1105 m Crest width - 10 m Foundation - Schist and greywacke Volume of dam body - 2285 x 1000 m3 |
|
| SPILLWAY | BOTTOM OUTLET |
| Location - Left
bank Control type - Uncontrolled Spillway type - Shaft spillway Sill elevation - 197,5 m Sill length - 15 m Maximum discharge - 56 m3/s Energy dissipation - Hydraulic jump |
Location - Left
bank Type - Rock tunnel Section - 1,2 x 1,6 m2 Maximum discharge - 46 m3/s Upstream control - Caterpillar gate Downstream control - Sluice gate Energy dissipation - Hydraulic jump |