Salsvatnet

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Salsvatnet
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Salsvatnet
Location of the lake
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Salsvatnet
Salsvatnet (Norway)
Location Fosnes and Nærøy, Trøndelag
Coordinates 64°42′39″N11°33′17″E / 64.7108°N 11.5546°E / 64.7108; 11.5546 Coordinates: 64°42′39″N11°33′17″E / 64.7108°N 11.5546°E / 64.7108; 11.5546
Type Meromictic lake
Basin  countries Norway
Max. length 22 kilometres (14 mi)
Max. width 6 kilometres (3.7 mi)
Surface area 44.77 km2 (17.29 sq mi) [1]
Average depth 156 metres (512 ft) [1]
Max. depth 464 metres (1,522 ft) [1]
Water volume 6.87 km3 (1.65 cu mi) [1]
Shore length1 105.61 kilometres (65.62 mi)
Surface elevation 9 metres (30 ft)
References NVE and Seppälä [1]
1 Shore length is not a well-defined measure.

Salsvatnet [2] is a lake in the municipalities of Fosnes and Nærøy in Trøndelag county, Norway. With its deepest depth of 464 metres (1,522 ft), it is Norway's and Europe's second-deepest lake, after Hornindalsvatnet. Alternate sources give the depth as either 464 metres (1,522 ft) or 482 metres (1,581 ft) at the deepest point. The lake sits very close to the ocean, about 9 metres (30 ft) above sea level at the surface and reaches to a depth of 455 metres (1,493 ft) below sea level. It is a very large lake with an area of 44.77 square kilometres (17.29 sq mi), a volume of 6.87 cubic kilometres (1.65 cu mi), and a shoreline that is 105.61 kilometres (65.62 mi) around. [3]

Lake A body of relatively still water, in a basin surrounded by land

A lake is an area filled with water, localized in a basin, that is surrounded by land, apart from any river or other outlet that serves to feed or drain the lake. Lakes lie on land and are not part of the ocean, and therefore are distinct from lagoons, and are also larger and deeper than ponds, though there are no official or scientific definitions. Lakes can be contrasted with rivers or streams, which are usually flowing. Most lakes are fed and drained by rivers and streams.

Fosnes Municipality in Trøndelag, Norway

Fosnes is a municipality in Trøndelag county, Norway. It is part of the Namdalen region. The administrative centre of the municipality is the village of Dun on the island of Jøa. Other villages include Salsnes and Nufsfjord.

Nærøy Municipality in Trøndelag, Norway

Nærøy is a municipality in Trøndelag county, Norway. Nærøy is part of the Namdalen region. Norway's smallest town, Kolvereid, is the administrative centre of the municipality. Some villages in Nærøy include Abelvær, Foldereid, Gravvik, Lund, Ottersøy, Salsbruket, Steine, and Torstad.

Salsvatnet is a meromictic lake, meaning that the water is permanently stratified, often without oxygen in the lower depths (bottom water) due to density gradient and a lack of turnover. A meromictic lake often preserves records of the geologic past. The lower layer of the lake is highly saline and as a result denser than the higher levels of water. Other meromictic lakes in Norway with old seawater in the lower depths include Kilevann, Tronstadvann, Botnvatnet, Rørhopvatnet, and Rørholtfjorden.

Meromictic lake Lake with layers of water that do not intermix

A meromictic lake has layers of water that do not intermix. In ordinary, "holomictic" lakes, at least once each year, there is a physical mixing of the surface and the deep waters.

Oxygen Chemical element with atomic number 8

Oxygen is a chemical element with symbol O and atomic number 8. It is a member of the chalcogen group on the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other compounds. By mass, oxygen is the third-most abundant element in the universe, after hydrogen and helium. At standard temperature and pressure, two atoms of the element bind to form dioxygen, a colorless and odorless diatomic gas with the formula O
2. Diatomic oxygen gas constitutes 20.8% of the Earth's atmosphere. As compounds including oxides, the element makes up almost half of the Earth's crust.

Bottom water is the lowermost water mass in a water body, by its bottom, with distinct characteristics, in terms of physics, chemistry, and ecology.

See also

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Altevatnet reservoir in Bardu, Norway

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Limingen lake in Trøndelag, Norway

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Lundevatn lake

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Vegår Lake in Vegårshei, Norway

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Selura

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Aursund lake in Røros, Norway

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Jølstravatn lake in Jølster, Sogn og Fjordane, Norway

Jølstravatnet or Jølstravatn is a lake in the municipality of Jølster in Sogn og Fjordane county, Norway. The lake empties its water into the 20-kilometre (12 mi) long Jølstra river which then flows into the Førdefjorden. The impressive eastern arm of Jølstravatn is called Kjøsnesfjorden, although it is not a true fjord that is part of the sea. The villages of Skei, Helgheim, Ålhus, and Vassenden are located on the shores of the lake.

Suldalsvatnet lake in Norway

Suldalsvatnet is the sixth-deepest lake in Norway. The 376-metre (1,234 ft) deep lake lies in the municipality of Suldal in Rogaland county, Norway. The 28-square-kilometre (11 sq mi) lake is the headwaters of the river Suldalslågen and it sits at an elevation of 69 metres (226 ft) above sea level. The lake has a volume of 4.49 cubic kilometres (1.08 cu mi).

Overdeepening

Overdeepening is a characteristic of basins and valleys eroded by glaciers. An overdeepened valley profile is often eroded to depths which are hundreds of metres below the deepest continuous line along a valley or watercourse. This phenomenon is observed under modern day glaciers, in salt-water fjords and fresh-water lakes remaining after glaciers melt, as well as in tunnel valleys which are partially or totally filled with sediment. When the channel produced by a glacier is filled with debris, the subsurface geomorphic structure is found to be erosionally cut into bedrock and subsequently filled by sediments. These overdeepened cuts into bedrock structures can reach a depth of several hundred metres below the valley floor.

References

  1. 1 2 3 4 5 Seppälä, Matti (2005). The Physical Geography of Fennoscandia. Oxford University Press. p. 145. ISBN   9780199245901.
  2. ↑ "Fakta om stedsnavn". statkart.no (in Norwegian). Kartverket . Retrieved 2015-07-15.
  3. ↑ Store norske leksikon. "Salsvatnet" (in Norwegian). Retrieved 2011-09-22.


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