FONTE SERNE DAM

PURPOSE - Irrigation
LOCATION GENERAL FEATURES
District - Setúbal
Municipality - Santiago do Cacém
Site - Fonte Serne
River Basin - Sado
River - Vale Diogo river
Promoting entity - Associação de Regantes e Beneficiários de Campilhas e Alto Sado
Owner (RSB) - A. R.B. de Campilhas e Alto Sado
Engineering by - DGSH
Construction by - José Bento Pedroso & Filhos
Project year - 1973
Year of completion - 1976
HYDROLOGY RESERVOIR
River basin area - 30 km2
Mean annual rainfall - 720 mm
Mean annual runoff - 6052 x 1000 m3
Flood runoff - 100 m3/s
Return period - 500 years
Reservoir area - 1050 x 1000m2
Gross capacity - 5150 x 1000m3
Effective storage - 3650 x 1000m3
Dead storage - 1500 x 1000m3
Normal water level (NWL) - 78,5 m
Maximum flood level (MFL) - 79,55 m
Minimum operating level - 74,3 m
DAM
Eathfill - Zoned embankment
Height above foundation - 17,5 m
Height above streambed - 16 m
Crest elevation - 81 m
Crest length - 324 m
Crest width - 7 m
Foundation - Clay and sandy clay
Volume of dam body - 152,4 x 1000 m3
SPILLWAY BOTTOM OUTLET
Location - Left bank
Control type - Uncontrolled
Spillway type - Chute spillway
Sill elevation - 78,5 m
Sill length - 15 m
Maximum discharge - 36 m3/s
Energy dissipation - Hydraulic jump
Location - Right bank
Type - Conduit under the embankment
Section - d 1500mm
Maximum discharge - 6,8 m3/s
Upstream control - Fixed roller gate
Downstream control - 2 gate valves
Energy dissipation - Impact basin


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