ROXO DAM |
|
| PURPOSE - Irrigation / Water supply | |
| LOCATION | GENERAL FEATURES |
| District -
Beja Municipality - Aljustrel Site - Ervidel River Basin - Sado River - Roxo river |
Promoting entity
- INAG Owner - Associação de Beneficiários do Roxo Engineering by - DGSH Construction by - Amaro & Mota, Lda Project year - 1958 Year of completion - 1967 |
| HYDROLOGY | RESERVOIR |
| River basin area
- 351 km2 Mean annual rainfall - 548,8 mm Flood runoff - 700 m3/s Return period - 1 000 years |
Reservoir area - 13
780 x 1 000 m2 Gross capacity - 96 311 x 1 000 m3 Effective storage - 89 511 x 1 000 m3 Dead storage - 6 800 x 1 000 m3 Normal water level (NWL) - 136 m Maximum flood level (MFL) - 137 m Minimum operating level - 124,5 m |
| DAM | |
| Earthfill - Homogeneous
embankment Concrete - Buttress + Gravity Composite dam - Yes Height above foundation - 49 m Height above streambed - 34 m Crest elevation - 139,5 m Crest length - 847 m Crest width - 5,5 m Foundation - Porphiry, schist and greywacke Volume of Earthfill - 364 x 1 000 m3 Volume of Concrete - 106 x 1 000 m3 |
|
| SPILLWAY | BOTTOM OUTLET |
| Location - Center Control type - Uncontrolled Spillway type - Over the dam Sill elevation- 136 m Sill length - 27 m Maximum discharge - 64 m3/s Energy dissipation - Hydraulic jump |
Location -
Left bank Type - Through the dam Section - d 2,0 m Maximum discharge - 47 m3/s Upstream control - Sluice gate Downstream control - Hollow jet valve Energy dissipation - Hollow jet and scour holes |