The Stausee Solis ("Solis reservoir") is a
reservoir
A reservoir (; from French ''réservoir'' ) is an enlarged lake behind a dam. Such a dam may be either artificial, built to store fresh water or it may be a natural formation.
Reservoirs can be created in a number of ways, including contro ...
on the
Albula river, located between
Alvaschein
Alvaschein ( Romansh: Alvaschagn) is a former municipality in the district of Albula in the canton of Graubünden in Switzerland. On 1 January 2015 the former municipalities of Alvaschein, Mon, Stierva, Tiefencastel, Alvaneu, Brienz/Brinzauls ...
,
Stierva
Stierva is a former municipality in the district of Albula in the canton of Graubünden in Switzerland. On 1 January 2015 the former municipalities of Alvaschein, Mon, Stierva, Tiefencastel, Alvaneu, Brienz/Brinzauls and Surava merged to form ...
and
Tiefencastel
Tiefencastel ( rm, Casti) is a village and a former municipality in the district of Albula in the canton of Graubünden in Switzerland. On 1 January 2015 the former municipalities of Alvaschein, Mon, Stierva, Tiefencastel, Alvaneu, Brienz/Brin ...
, in the canton of
Graubünden.
Geography
Its surface area is . It was built in 1986 by the Electric Power Company of Zurich (ewz). A dam of height and a crown length of holds back the water in the lake. The water in the reservoir is used for energy production further downstream in the power plants Sils and Rothenbrunnen. This dam is used as daily storage.
Because of the small size of the lake compared with its catchment area sediment aggregation plays an important role. Around of sediment settles down every year in the lake, so that by 2012 about 50% of the reservoir volume of was occupied by sediment. In 2012 a sediment bypass tunnel (SBT) was built, which operates only a few days every year, but eliminates sedimentation in the reservoir almost completely. But there are many investigations due to abrasion in the tunnel to make.
The dam is located just east of the
Solis Viaduct
The Solis Viaduct (german: Soliser Viadukt) is a single track eleven-arched limestone railway viaduct. It spans the Albula east of the hamlet of Solis, in the canton of Graubünden, Switzerland.
Designed by the engineer Hans Studer, it was ...
of the
Albula Railway
The Albula Railway (german: Albulalinie; it, Linea dell'Albula; rm, Lingia da l'Alvra) is a single track metre gauge railway line forming part of the so-called core network of the Rhaetian Railway (RhB), in the canton of Graubünden, Switzerla ...
.
See also
*
List of mountain lakes of Switzerland
This is a list of high-altitude lakes in Switzerland. It includes all significant lakes, natural or artificial, with an area over 4 hectares and a height over 800 metres above sea level. This height approximately corresponds to the transiti ...
References
Lakes of Graubünden
Reservoirs in Switzerland
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