Lake Biel
Lake Bienne
Bielersee (German)
Lac de Bienne (French)
Lake Biel is located in Canton of Bern
Lake Biel
Lake Biel
Lake Biel is located in Canton of Neuchâtel
Lake Biel
Lake Biel
Lake Biel is located in Switzerland
Lake Biel
Lake Biel
Lake Biel is located in Alps
Lake Biel
Lake Biel
LocationCanton of Bern
Coordinates47°5′N 7°10′E / 47.083°N 7.167°E / 47.083; 7.167
Catchment area8,305 km2 (3,207 sq mi)
Basin countriesSwitzerland
Max. length15 km (9.3 mi)
Max. width4.1 km (2.5 mi)
Surface area39.3 km2 (15.2 sq mi)
Max. depth74 m (243 ft)
Water volume1.12 km3 (910,000 acre⋅ft)
Residence time58 days
Surface elevation429 m (1,407 ft)
IslandsSt. Peter's Island
SettlementsBiel/Bienne (see list)

Lake Biel or Lake Bienne (German: Bielersee; French: Lac de Bienne [lak də bjɛn]) is a lake in western Switzerland. Together with Lake Morat and Lake Neuchâtel, it is one of the three large lakes in the Jura region of Switzerland. It lies on the language boundary between German and French speaking areas.

Geography

The lake is 15 km long and up to 4.1 km wide. Its surface area is 39.3 km², the maximum depth 74 m. The lake is located at 429 metres above sea level.

Lake Biel/Bienne has a catchment area of about 8,305 km². Water remains in the lake for an average of 58 days. The rivers Aare and Zihl/Thielle flowing from Lake Neuchâtel, the Twannbach draining water down from the surplombing first Jura mountain range and the Suze draining water down from the Vallon de St. Imier, are the main tributaries. The Aare was redirected into the lake in 1878, in order to prevent the flooding of the nearby area called "Seeland", and drains the water out of the lake down to Büren through a simultaneously man-made channel. The level of all three lakes is being controlled by a dam built across the channel, in Port.

The largest settlement along the shores of Lake Biel are the bilingual city of Biel/Bienne and its sister city Nidau, both located on the northern end. The St. Peter's Island attracts tourists. The island is located near Erlach/Cerlier. Jean-Jacques Rousseau once spent a few months on the island.

One of the main business in the area is the watch and affiliated microtechnic industries. World famous watch brands have their sites and headquarters in the area, including the Swatch Group and Rolex movements manufacture.

The lake's surface is the lowest point of the canton of Neuchâtel.

Towns and villages by the lake

The lake at Alfermée with the view of Biel/Bienne and Nidau

As the lake is located on the border of the French and German language regions, most places have names in both languages, though not all versions are still in use.

Wikimedia Commons has media related to Lake Biel.
  • Lake Biel in German, French and Italian in the online Historical Dictionary of Switzerland.
  • Waterlevels of Lake Bienne at Ligerz
  • Tourism Biel/Bienne Seeland
  • Coolidge, William Augustus Brevoort (1911). "Bienne, Lake of" . Encyclopædia Britannica. Vol. 3 (11th ed.). p. 921.
Lake Biel, view from Nidau
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