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Tyrifjorden

Coordinates: 60°02′N 10°08′E / 60.033°N 10.133°E / 60.033; 10.133
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Tyrifjorden
Coordinates60°02′N 10°08′E / 60.033°N 10.133°E / 60.033; 10.133
TypeFjord lake
Basin countriesNorway
Surface area136 km²[1]
Average depth97 m[1]
Max. depth295 m[1]
Water volume13.1 km³[1]
Surface elevation62 m[1]
References[1]

Tyrifjorden is Norway's fifth largest lake with an area of 137 km2. It has a volume of 13 km3, is 295 meters deep at its deepest, and lies 63 meters above sea level. The Begna River discharges into Tyrifjorden at Hønefoss where the river forms the waterfall of Hønefossen.

Location

Tyrifjorden is located in the county of Buskerud and borders the municipalities of Hole, Lier, Modum, and Ringerike. Tyrifjorden is a landlocked fjord. It consists of a main body, Storfjorden, along with the Holsfjorden, Nordfjorden, and Steinsfjorden branches.

Branches

  • Nordfjorden - This is the northernmost fjord arm of Tyrifjorden
  • Steinsfjorden - This is the northeastern arm of Tyrifjorden
  • Holsfjorden - This is the southeastern arm as well as being the longest and largest of the fjord branches

Islands

  • Utøya
  • Storøya - with a golf club
  • Frognøya

Ethnology

The Old Norse form of the name was just Tyri (or Tyrvi). This uncompounded name is also the first element in the name Tyristrand. The name is derived from the word tyri n 'old/dead pine (wood)'. (Referring specially to the woods of the western side of the lake.) The last element -fjorden (the finite form of fjord) is a later addition.

Tyrifjorden map
Tyrifjorden

2011 shooting massacre

On 22 July, 2011, the island of Utøya on the lake was the site of a shooting spree during a youth camp held by the Norwegian Labour Party.

References

  1. ^ a b c d e f Seppälä, Matti (2005), The Physical Geography of Fennoscandia, Oxford University Press, p. 145, ISBN 9780199245901