Yacyretá

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Yacyretá
Power plant and dam
Power plant and dam
Location: Paraguay , Argentina
Tributaries: Río Paraná
Drain: Río Paraná
Major cities nearby: Corrientes
Yacyretá (Argentina)
Yacyretá
Coordinates 27 ° 28 ′ 58 ″  S , 56 ° 44 ′ 9 ″  W Coordinates: 27 ° 28 ′ 58 ″  S , 56 ° 44 ′ 9 ″  W
Data on the structure
Construction time: - 1992
Height above foundation level : 42 or 75 m (?)
Height of the structure crown: 86 m
Building volume: 65,923,800 m³
Crown length: 66.5 km
Power plant output: 2700-4050 MW
Data on the reservoir
Altitude (at congestion destination ) 82 m
Water surface 1,600 km²dep1
Storage space 21,000 million m³

The Entidad Binacional Yacyretá ( binational corporation Yacyretá ; from Guaraní : jasy retã 'land of the moon') is a dam and hydroelectric power station on Paraná , on the border between Paraguay and Argentina . The Entidad Binacional Yacyretá is located in the Paraguayan city of Ayolas 35 km west of the Argentine city of Posadas and 200 km east of Corrientes at the Apipé waterfalls. The dam is also used to regulate floods.

The dam

The dam was made of homogeneous earth material and has an impermeable core. It is 21.3 m to a maximum of 24.1 m high, the Paraná is dammed up to a maximum height of 83 m above sea level. Until 2011, the dam was only operated with a storage height of 76 m. The total volume of the dam is 65,923,800 m³, that of the main structure (?) 3,400,000 m³. Its length is also specified differently. It is between 64.7 and 66.5 kilometers. With this enormous length, the dam is one of the longest in the world.

environmental issues

The hydropower plant, which was completed in 1992 and inaugurated in 1998 and is one of the largest in the world, was co-financed by the World Bank and is ecologically highly controversial. In contrast to the Itaipú power station located upstream, the Paraná did not largely flow in a valley in this area, which is also evident from the enormous length of the dam of 66.5 km. The water of the reservoir , which is heavily polluted by rotting biomass , pollutes the surrounding groundwater.

Power generation

Despite the significantly larger area of ​​the reservoir with 1,600 km² compared to the world's most productive hydropower plant Itaipú (1,350 km²), the twenty turbines generate significantly less electricity with a flow rate of 700 (according to other sources 830) m³ / s. According to various statements, the installed capacity is 2,700–4,050 megawatts (Itaipú: 14,000 megawatts). The power plant can thus cover around a quarter of Argentina's consumption. The electricity produced annually of 18 to 20 million MWh (Itaipú: max. 103 million MWh in 2016) goes entirely to Argentina . Since Argentina has pre-financed the project, Paraguay is paying off its 50% stake in the project in this way.

In 2011, the output of the power plant had to be limited to 80% of the maximum output, as cavitation damage had occurred to the turbines.

Shipping bypasses the dam through a lock system .

See also

Web links

Commons : Yacyretá  - collection of images, videos and audio files

Individual evidence

  1. ↑ http://www.eby.gov.py/index.php/chy/datostecnicos
  2. ↑ Record electricity production - Itaipu outperforms competition. n-tv.de, January 3, 2009, accessed on March 27, 2010 .
  3. ^ Report by Diario ABC of November 13, 2011 (Spanish) accessed on November 30, 2011
  4. ^ Report by Diario ABC of November 14, 2011 (Spanish) accessed on November 30, 2011