Birs (river)

The Birs in Laufen

The Birs (French: Birse) is a 73-kilometre (45 mi) long river in Switzerland that flows through the Jura region and ends as a tributary to the Rhine between Basel and Birsfelden. It is the most important river of the Swiss Jura.

Course

The Birs has its source in a spring near the Col de Pierre Pertuis at 762 metres (2,500 ft) above sea level a little southwest of Tavannes in the Jura bernois. It starts as a proper river; the large amount of water is the product of an extended underground river system.

The Birs runs through wider valleys (Vallée de Tavannes) and narrow gorges. Near Delémont, the capital of the canton of Jura, it joins the Sorne and the Scheulte. Between Soyhières and Liesberg, it leaves the French-speaking part of Switzerland and enters the canton of Basel-Landschaft. In Laufen it forms a waterfall, which was the source of power and of the name of the city.

At the gorge of Angenstein, the river runs into the Birseck, the lowland by Aesch. Between Aesch and Dornach, the Birs is rich in fresh-water crabs, the native species of which are now threatened by the American red crab. Earlier, the Birs was polluted and dammed, but it has largely been restored to its original state.

The Reinacherheide is a wildlife preserve with 83 species of bird.

The mouth of the Birs was hardly settled until the 18th century. Today, the city of Münchenstein stands there. The lower stretches of the Birs form the border between Basel-Stadt and Basel-Landschaft. In 2004, it was restored from a concrete canal to a more natural river. Beavers have even been sighted along the river. The Birs also forms the border between the cities of Basel and Birsfelden. It flows into the Rhine at Birskopf after 73 kilometres (45 mi).

References

Birs in the Historisches Lexikon der Schweiz

Picture gallery

The Birs Source south of Tavannes
Headwaters of the Birs by Tavannes
The Birs south of Court (Gorges de Court)
Gorges de Moutier
The restored Birs in Münchenstein
The Birs by the Elektra Birseck Münchenstein
Birs waterfall in the Neue Welt, Münchenstein
The Birs by Birsfelden
Aerial view of the Rhine, with Birs entering the Rhine

Wikimedia Commons has media related to Birs.

Tributaries of the Rhine

Left (western)	Vorderrhein Aua Russein Schmuèr Alpine Rhine Vorderrhein Tamina Rietaach Alter Rhein Freibach Lake Constance Goldach High Rhine Thur Töss Glatt Aare Sissle Ergolz Birs Birsig Upper Rhine Ill Moder Sauer Lauter Spiegelbach Queich Speyerbach Rehbach Isenach Eckbach Eisbach Pfrimm Selz Middle Rhine Nahe Moselle Nette Brohlbach Ahr Lower Rhine Erft

Right (eastern)	Vorderrhein Rein da Tuma Rein da Curnera Rein da Medel Rein da Sumvitg Glogn Rabiusa Hinterrhein Ragn da Ferrera Albula/Alvra Alpine Rhine Hinterrhein Plessur Landquart Mülbach Ill Frutz Lake Constance Dornbirner Ach Bregenzer Ach Leiblach Schussen Rotach Brunnisaach Lipbach Seefelder Aach Stockacher Aach Radolfzeller Aach High Rhine Biber Wutach Alb Murg Wehra Upper Rhine Wiese Elz Kinzig Rench Acher Murg Alb Pfinz Saalbach Kraichbach Leimbach Neckar Weschnitz Modau Main Middle Rhine Wisper Lahn Wied Lower Rhine Sieg Wupper Düssel Ruhr Emscher Lippe IJssel Oude IJssel/Issel Berkel Schipbeek

Coordinates: 47°35′N 7°36′E / 47.583°N 7.600°E / 47.583; 7.600

This article is issued from Wikipedia - version of the Tuesday, April 19, 2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.