The Otra is the largest
river in the
Sørlandet
Southern Norway ( no, Sørlandet; lit. "The Southland") is the geographical List of regions of Norway, region (''landsdel'') along the Skagerrak coast of southern Norway. The region is an informal description since it does not have any govern ...
region of
Norway. It begins in
Setesdalsheiene mountains at the lake Breidvatnet in
Bykle municipality in
Agder county, just south of the border with
Vinje municipality in
Vestfold og Telemark county. The river then flows south through
Bykle,
Valle
Valle may refer to:
* Valle (surname)
Geography
*"Valle", the cultural and climatic zone of the dry subtropical Interandean Valles of the Andes of Peru, Bolivia, and northwest Argentina
*University of Valle, a public university in Cali, Colombia ...
,
Bygland,
Evje og Hornnes,
Iveland,
Vennesla, and
Kristiansand municipalities. The river empties into the
Skagerrak in the center of the city of
Kristiansand on the southern coast of Norway.
The Otra is long, making it
Norway's eighth-longest river. There are many large lakes along the river including:
Ã…raksfjorden,
Byglandsfjorden,
Hartevatnet, and
Kilefjorden. There are 12
hydroelectric
Hydroelectricity, or hydroelectric power, is electricity generated from hydropower (water power). Hydropower supplies one sixth of the world's electricity, almost 4500 TWh in 2020, which is more than all other renewable sources combined and ...
power plants built along the river, which produce much of the electricity for the southern part of Norway.
The
salmon do well in the Otra river because the water is not too
acidic. The
calcareous rocks in the catchment area at the northern end of the
Setesdal valley give the water a certain buffer capacity against
acidification.
References
External links
*
Rivers of Agder
Setesdal
Geography of Kristiansand
Vennesla
Iveland
Evje og Hornnes
Bygland
Valle, Norway
Bykle
Rivers of Norway
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