Arzkarsee

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Arzkarsee
The Arzkarsee from the north, the dam on the left
The Arzkarsee from the north, the dam on the left
Tributaries: from the Kuppelwieserferner and Hasenöhrlferner
Drain: Pressure pipe to the Kuppelwieser Alm and Kuppelwieserbach power plants
Arzkarsee (South Tyrol)
Arzkarsee
Coordinates 46 ° 33 '1 "  N , 10 ° 53' 25"  E Coordinates: 46 ° 33 '1 "  N , 10 ° 53' 25"  E
Data on the structure
Lock type: Gravity dam
Construction time: 1965-1966
Height of the barrier structure : 85 m
Building volume: 610,000 m³
Crown length: 464.8 m
Power plant output: 42 MW
Operator: Alperia Greenpower GmbH
Data on the reservoir
Altitude (at congestion destination ) 2250  m
Water surface 30 ha
Storage space 12.6 million m³
Particularities:

Pressure tunnel to the power plant 358 m below

The Arzkarsee (also Arzkar-Stausee , sometimes also Arzker-Stausee , Italian Lago Quaira ) is a reservoir above the Ulten Valley northwest of St. Nikolaus in South Tyrol . It lies at an altitude of 2250  m and is thus the highest reservoir in the Ulten Valley area after the Grünsee .

Its gravity dam is 85 meters high and has a crown length of 464.8 meters. Their total volume is 610,000 m³. The 3257  m high peak of the Hasenöhrl rises about 2.5 kilometers west of the lake . Its glacier area with the Hasenöhrlferner and Kuppelwiesferner supplies the water for the lake. Its water surface covers about 30 hectares with a storage capacity of 12.6 million cubic meters.

The Arzkarsee was built from 1965 to 1966 as the last of the reservoirs for the hydropower plants in Ultental . A pressure tunnel leads from here to the Kuppelwieser Alm power station, 358 meters below . 13 cubic meters of water per second generate an output of 42 megawatts in the turbine there.

The system also works as a pumped storage plant, in which water can be pumped up from the Weißbrunnsee into the Arzkarsee with a high-performance pump during the low- consumption period , up to 8.5 m³ / s.

The dam of the Arzkarsee can be crossed on the top of the wall.

literature

  • Christoph Gufler: The lost legacy: the power plant and reservoir construction in Ulten and Lana , Verlag-Anst. Athesia Bozen, 2007, ISBN 978-88-8266-096-3
  • SE Hydropower GmbH: hydropower plants Ultental , folder, ( digitized )

Web links

Commons : Arzkarsee  - collection of images

Individual evidence

  1. ↑ Measured with Geobrowser South Tyrol
  2. ↑ Hikr.org