| ALIJÓ DAM | |
| PURPOSE - Water supply | |
| LOCATION | GENERAL FEATURES |
| District -
Vila Real Municipality - Alijó Site - Vila Chã River Basin - Douro River - Chã river |
Promoting entity
- INAG Owner (RSB) - INAG Engineering by - Hidrotécnica Portuguesa Construction by - CPTP Project year - 1985 Year of completion - 1991 |
| HYDROLOGY | RESERVOIR |
| River basin area
- 9 km2 Mean annual rainfall - 900 mm Mean annual runoff - 2920 x 1000 m3 Flood runoff - 72 m3/s Return period - 1000 years |
Reservoir area -
180 x 1000m2 Gross capacity - 1740 x 1000m3 Effective storage - 1590 x 1000m3 Dead storage - 150 x 1000m3 Normal water level (NWL) - 658,5 m Maximum flood level (MFL) - 659,9 m Minimum operating level - 640 m |
| DAM | |
| Earthfill - Zoned
embankment Height above foundation - 40 m Height above streambed - 36 m Crest elevation - 660,9 m Crest length - 167 m Crest width - 6 m Foundation - Weathered granite Volume of dam body - 352,4 x 1000 m3 |
|
| SPILLWAY | BOTTOM OUTLET |
| Location - Left
bank Control type - Uncontrolled Spillway type - Chute spillway Sill elevation - 658,5 m Sill length - 20,9 m Maximum discharge - 52 m3/s Energy dissipation - Flip bucket |
Location - Left
bank Type - Conduit under the embankment Section - 1,0 m Maximum discharge - 2,5 m3/s Upstream control - Sluice gate Downstream control - Howell-Bunger valve Energy dissipation - Hollow jet and scour hole |