Otra

For the Royal Norwegian Navy minesweepers named after the river, see HNoMS Otra.

Otra
File:Otra-Kristiansand.jpg Otra running through the city Kristiansand, where it is also called Torridalselva or Torridalselven.
Origin	Setesdalsheiene
Mouth	Kristiansand
Basin countries	Norway
Length	245 km (152 mi)
Avg. discharge	150 m3/s (5,300 cu ft/s) at mouth
Basin area	3,737 km2 (1,443 sq mi)

The Otra river is the largest river in the Sørlandet region of Norway. It flows from the Setesdalsheiene mountains in Bykle municipality in Aust-Agder county in the north, down to the municipality of Kristiansand in the south, where it flows into the Skagerrak.

The Otra is 245 kilometres (152 mi) long, making it Norway’s eighth longest river. There are many large lakes along the river including: Åraksfjorden, Byglandsfjorden, Hartevatnet, and Kilefjorden. There are 12 hydroelectric 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 top of Setesdal which river water a certain buffer capacity against acidification.

External links

• Media related to at Wikimedia Commons