AZIBO DAM

PURPOSE - Irrigation / Water supply / Landscape valorization (Natural park)
LOCATION GENERAL FEATURES
District - Braganša
Municipality - Macedo de Cavaleiros
Site - Vale da Porca - Salselas
River Basin - Douro
River - Azibo river
Promoting entity - INAG
Owner  (RSB) - INAG
Engineering by - COBA
Construction by - Azevedo Campos, SARL
Project year - 1977
Year of completion - 1982
HYDROLOGY RESERVOIR
River basin area - 91 km2
Mean annual rainfall - 715 mm
Mean annual runoff - 32000 x 1000 m3
Flood runoff - 350 m3/s
Return period - 1000 years
Reservoir area - 4100 x 1000m2
Gross capacity - 54470 x 1000m3
Effective storage - 46670 x 1000m3
Dead storage - 7800 x 1000m3
Normal water level (NWL) - 602 m
Maximum flood level (MFL) - 603,65 m
Minimum operating level - 575 m
DAM
Earthfill - Zoned embankment
Height above foundation - 56 m
Height above streambed - 52 m
Crest elevation - 606 m
Crest length - 551 m
Crest width - 10 m
Foundation - Greywacke and schist
Volume of dam body - 1561 x 1000 m3
SPILLWAY BOTTOM OUTLET
Location - Left bank
Control type - Controlled
Spillway type - Chute spillway
Sill elevation - 600 m
Sill length - 2 x 6 m
Number of gates - 2 sector gates
Maximum discharge - 170 m3/ s
Energy dissipation - Hydraulic jump
Location - Right bank
Type - Rock tunnel
Section - d 2,0 m
Maximum discharge - 45,6 m3/s
Upstream control - Sluice gate
Downstream control - Radial gate
Energy dissipation - Hydraulic jump


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