VENDA VELHA DAM |
|
PURPOSE - Irrigation / Flood control | |
LOCATION | GENERAL FEATURES |
District -
Setúbal Municipality - Montijo Site - Rio Frio River Basin - Tejo River - Asseiceira river |
Promoting entity
- Sociedade Agrícola de Rio Frio Owner (RSB) - Sociedade Agrícola de Rio Frio Engineering by - Engº José Lupi; HP Project year - 1957 Year of completion - 1957 |
HYDROLOGY | CARACTERÍSTICAS DA ALBUFEIRA |
River basin area
- 174 km2 Mean annual rainfall- 600 mm Mean annual runoff- 17 400 x 1 000 m3 Flood runoff - 300 m3/s Return period - 100 years |
Reservoir area - 1
150 x 1 000 m2 Gross capacity - 4 700 x 1 000 m3 Effective storage - 60 x 1 000 m3 Normal water level (NWL) - 14,55 m Maximum flood level (MFL) - 16,35 m Minimum operating level - 5,55 m |
DAM | |
Earthfill -
Homogeneous embankment Height above foundation - m Height above streambed - 12,5 m Crest elevation - 18,55 m Crest length - 550 m Crest width - 4 m Foundation - Alluvia and clay Volume of dam body - 78 x 1000 m3 |
|
SPILLWAY | BOTTOM OUTLET |
Location - Saddle
at left embankment Control type - Uncontrolled Spillway type - Chute spillway Sill elevation - 14,55 m Sill length - 110 m Maximum discharge - 139 m3/s Energy dissipation - Hydraulic jump |
Location -
Thalweg Type - Conduit under the embankment Section - Oval Maximum discharge - 12 m3/s Upstream control - Sluice gate Energy dissipation - Inexistent |