Lake Carmena
| Lake Carmena | |||||||||
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| Coordinates | 725 896 / 114136 | ||||||||
| Data on the structure | |||||||||
| Lock type: | Arch dam | ||||||||
| Construction time: | 1968-1970 | ||||||||
| Height of the barrier structure : | 39 m | ||||||||
| Height of the structure crown: | 639 m above sea level M. | ||||||||
| Building volume: | 8th 600 m³ | ||||||||
| Crown length: | 99 m | ||||||||
| Base width: | 5.1 m | ||||||||
| Power plant output: | 15 MW | ||||||||
| Operator: | Aziende Municipalizzate di Bellinzona | ||||||||
| Data on the reservoir | |||||||||
| Altitude (at congestion destination ) | 636.5 m above sea level M. | ||||||||
| Water surface | 2.4 ha | ||||||||
| Reservoir length | 400 km | ||||||||
| Reservoir width | 120 km | ||||||||
| Storage space | 300 000 m³ | ||||||||
| Total storage space : | 250 000 m³ | ||||||||
| Catchment area | 34 km² | ||||||||
| Design flood : | 270 m³ / s | ||||||||
The Lago di Carmena is a reservoir in the Valle Morobbia near Giubiasco in the canton of Ticino in Switzerland . It is used to operate the Morobbia power station , which supplies the city of Bellinzona with electricity.
history
A first concession to use the water from the Morobbia was granted to the Gotthard Railway Company in 1884 , but it was never used. The energy would have been intended for the then newly opened maintenance workshop in Bellinzona. The city of Bellinzona then applied for the license, which was granted to it in 1900. The first power plant was completed in 1903 and used a water intake at the site of the present dam. The facility generated electricity for lighting purposes and local industry.
In the 1960s, the existing power plant was outdated and worn out, and at the same time Bellinzona's energy requirements had risen sharply, so production should be increased. Various projects were examined, including one called Grande Morobbia , which would also have included the water from the Valle di Arbedo and Valmaggina and the Vedeggio flowing in Val d'Isone . Due to technical and expected political difficulties in the implementation of the project, this was waived and instead a weekly storage facility was built at Carmena on the soil of the former municipality of Sant'Antonio . The project was supervised by the Lombardi engineering office . The lake with the dam was put into operation together with the renewed power station on March 22, 1972.
Dam wall
The Diga di Carmena has its crown at an altitude of 639 m above sea level. The arch dam consists of eight segments that are 12 to 15 m wide. The inlet structure for the pressure tunnel to the power plant and the bottom outlet of the reservoir are arranged in a common structure. The dam is monitored by a floating plumb line and 10 thermometers in the middle segment. In addition, 8 extensometers in the rock monitor the movement of the wall foundation.
Individual evidence
- ↑ a b G. Gendotti: Richiesta preliminare per il rinnovo della concessione della Morobbia al Comune di Bellinzona . July 1, 2004.
- ^ WE Bossard: The hydropower of Switzerland . Part II: Exploited hydropower on January 1, 2014 . Ed .: Swiss Department of the Interior, Department of Water Management. tape 4 . Bern 1916, p. 308-309 .
- ↑ a b Fabio Tognola: Carmena. (PDF; 489 kB) Swiss Dam Committee, accessed on December 29, 2018 .