- Tinnsjå
Infobox_lake
lake_name = Tinnsjå
image_lake = Tinnsjo - Norway.jpg
caption_lake =
image_bathymetry =
caption_bathymetry =
location =Telemark
coords = coord|59|54|N|8|55|E|region:NO_type:waterbody|display=inline,title
type =
inflow =Måna
outflow =Tinnelva
catchment =
basin_countries = Norway
length =
width =
area = 51.43 km²
depth = 190 m
max-depth = 460 m
volume = 9.71 km³
residence_time =
shore =
elevation = 190 m
islands =
cities =
reference= Citation| last=Seppälä| first=Matti| title=The Physical Geography of Fennoscandia | url=http://books.google.com/books?id=q33WekTp7tgC&pg=PA145| publisher=Oxford University Press|date=2005| page=145| isbn=0-19-924590-8]Tinnsjå (Tinnsjø, Tinnsjøen) is one of the largest lakes in Norway. It is located between the municipalities of
Tinn andNotodden inTelemark county. At its source in the west, theMåna river flows out ofMøsvatn and pastRjukan into Tinnsjå. From the north, the river Mår flows from the Mår,Gøystavatn , andKalhovdfjorden lakes to join the Måna river before entering Tinnsjå. Tinnsjå is part of theSkiensvassdrag , and drains via theTinnelva river in the south, down toHeddalsvatn .In 1944, during the German occupation of Norway, the ferry SF "Hydro" was sunk in Tinnsjå by the Norwegian resistance. The Germans were using the ferry to transport a large quantity of heavy water to Germany, where it was to be used for nuclear weapon research. The heavy water had been produced at
Vemork , a factory located inRjukan . The wreck of the ferry was discovered in1993 . [cite book |author=Payton, Gary and Lepperød, Trond |title=Rjukanbanen; på sporet av et industrieventyr |publisher=Mana Forlag |location=Rjukan |year=1995 |language=Norwegian |isbn=82-993549-1-9] In2004 , it was investigated and filmed for an episode of NOVA; heavy water samples were recovered anddeuterium isotopic enrichment was confirmed.In April 2005, a previously unknown species of fish was discovered in Tinnsjå. A film crew shooting footage for a new documentary on the heavy water sabotage became aware of an unusual fish, swimming near the lake bottom at a depth of 430 m. The light-colored, translucent fish was about 15 cm long and seemed to lack a swimming bladder.
References
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