The Doubs (French: Le Doubs, French pronunciation: [du], German: Dub) is a 453-kilometre (281 mi) long river in eastern France and western Switzerland, left tributary of the Saône. Its source is near Mouthe in the western Jura mountains, at an altitude of 946 m. It is the tenth longest French river in France.
The Doubs just before Besançon
|Native name||Le Doubs|
|⁃ location||Mouthe, Jura mountains|
|⁃ elevation||946 m (3,104 ft)|
|175 m (574 ft)|
|Length||453 kilometres (281 mi)|
|Basin size||7,500 km2 (2,900 sq mi)|
|⁃ average||176 m3/s (6,200 cu ft/s)|
|Progression||Saône→ Rhône→ Mediterranean Sea|
|Lakes||Lac de Saint-Point, Lac des Brenets, Lac de Moron|
From its source in Mouthe it flows northeast, more or less along the French-Swiss border (forming the border for approx. 40 km). Near Montbéliard it turns southwest, until it flows into the river Saône in Verdun-sur-le-Doubs, approx. 20 km northeast of Chalon-sur-Saône. Its entire course resembles an inverted letter U, with the northeastern corner the only point at which the Doubs flows into Switzerland as far as Saint-Ursanne. In Switzerland it traverses the cantons Jura and Neuchâtel.
The waterfall known as the Saut du Doubs is located on the French-Swiss border. The river, which has been dammed up by landslide debris, forms the 4-kilometer long, but only 200-meter wide, winding Lac des Brenets. The 27-meter high Doubs Falls are located at its end. The falls can be reached on foot or by passenger boat.
- Doubs (F): Pontarlier
- Neuchâtel (CH)
- Jura (CH): Saint-Ursanne
- Doubs (F): Montbéliard, Besançon
- Jura (F): Dole
- Saône-et-Loire (F): Verdun-sur-le-Doubs
The river forms several lakes:
Floods and seasonal variationEdit
The rate of flow of the Doubs is very seasonally variable. The flooding season can stretch from September to May, with floods being occasioned either by heavy rains or by quick melting of snow from the Jura mountains. At its mouth, the discharge rate can vary from as low as 20 m³/s to over 1000 m³/s during floods.
In Besançon, the largest floods have been in 1852 (8.50 m), in 1896 (7.96 m) and in 1910. There have also been many lesser floods more recently.
As a mountain river with substantial discharge, the Doubs has been used for electricity generation. Among several hydroelectric stations, the most important are the Dam of Châtelot, 74 metres tall, and the Dam of Refrain, 66.5 metres tall.
|Wikisource has the text of the 1911 Encyclopædia Britannica article Doubs (river).|
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