Belver Dam
Belver Dam (Portuguese: Barragem de Belver) is a concrete gravity dam on the Tagus, where the river forms the border line between the Portuguese districts of Portalegre and Santarém. It is located in the municipality Gavião, in Portalegre District.
| Belver Dam | |
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  Location of Belver Dam in Portugal | |
| Official name | Barragem de Belver |
| Location | municipality Gavião, Portalegre District, Portugal |
| Coordinates | 39°28′47.2″N 7°59′52.3″W |
| Purpose | Power |
| Status | Operational |
| Construction began | 1945 |
| Opening date | 1952 |
| Owner(s) | HIDROTEJO |
| Operator(s) | Energias de Portugal |
| Dam and spillways | |
| Type of dam | Concrete gravity dam |
| Impounds | Tagus |
| Height (foundation) | 30 m (98 ft) |
| Length | 327.5 m (1,074 ft) |
| Elevation at crest | 47.5 m (156 ft) |
| Dam volume | 90,000 m3 (3,200,000 cu ft) |
| Spillway type | Dam body |
| Spillway capacity | 18,000 m3 (640,000 cu ft) |
| Reservoir | |
| Total capacity | 12,500,000 m3 (10,100 acre⋅ft) |
| Active capacity | 8,500,000 m3 (6,900 acre⋅ft) |
| Surface area | 2.86 km2 (1.10 sq mi) |
| Normal elevation | 46.15 m (151.4 ft) |
| Operator(s) | Energias de Portugal |
| Commission date | 1951 |
| Hydraulic head | 15.2 m (50 ft) (max) |
| Turbines | Kaplan-type: 4 x 8.091 MW, 1 x 15.997 MW, 1 x 35.304 MW |
| Installed capacity | 80.7 MW |
| Annual generation | 220 GWh |
Construction of the dam began in 1945. The dam was completed in 1952. It is owned by HIDROTEJO.[1]
Dam
Belver Dam is a 30-metre-tall (98 ft) (height above foundation) and 327.5-metre-long (1,074 ft) gravity dam with a crest altitude of 47.5 metres (156 ft). The volume of the dam is 90,000 m³. The spillway is part of the dam body (10 roller gates with a maximum discharge capacity of 18,000 m³/s).[1]
Reservoir
At full reservoir level of 46.15 metres (151.4 ft) (maximum flood level of 47.15 metres (154.7 ft)) the reservoir of the dam has a surface area of 2.86 km² and its total capacity is 12.5 mio. m³. The active capacity is 8.5 (7.5)[2] mio. m³. Minimum operating level is 41 metres (135 ft).[1]
Power plant
The run-of-the-river hydroelectric power plant went operational in 1951.[2] It is operated by EDP. The plant has a nameplate capacity of 80.7[1][2][3] (80)[4] MW. Its average annual generation is 220[2] (176,[1] 180[3] or 239[4]) GWh.
The power station contains six Kaplan turbine-generators in a dam powerhouse. The machines 1 to 5 have vertical shafts, whereas machine 6 has a horizontal shaft. The maximum hydraulic head is 15.2 metres (50 ft).[2]
| Machine | Commission date[3] | Turbine (MW) | Generator (MVA) | Rotation |
|---|---|---|---|---|
| 1 | 1951 | 8.091 | 11 | 167 |
| 2 | 1951 | 8.091 | 11 | 167 |
| 3 | 1951 | 8.091 | 11 | 167 |
| 4 | 1951 | 8.091 | 11 | 167 |
| 5 | 1971 | 15.997 | 20 | 125 |
| 6 | 1984 | 35.304 | 31 | 100 |
References
- "BELVER DAM". APA Barragens de Portugal. Retrieved 2015-02-22.
- "Belver Informação Técnica" (in Portuguese). Energias de Portugal. Archived from the original on 2017-08-15. Retrieved 2015-02-22.
- "DECLARAÇÃO AMBIENTAL 2012" (PDF) (in Portuguese). Energias de Portugal. pp. 51 (49). Archived from the original (PDF) on 2014-11-03. Retrieved 2015-02-07.
- "Hidroelectricidade em Portugal memória e desafio" (PDF) (in Portuguese). Rede Eléctrica Nacional, S.A. p. 29 (27). Archived from the original (PDF) on 2021-06-27. Retrieved 2015-02-05.
Hydroelectric dams on the Tagus | |
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