The most populous settlement of the basin lies on its banks, Besançon. Its course includes a small waterfall and a 4-kilometre (2.5 mi) narrow lake.
Course
From its source in Mouthe it flows northeast: a few kilometers north of the French-Swiss border, then to form the border for less distance, about 40 km. North of the Swiss town of Saint-Ursanne it turns west then southwest. South-east of Montbéliard it adopts a southwest striation or fault of the Jura Mountains, flowing so over greater distance than the flow it has traced before. It then flows into the Saône at Verdun-sur-le-Doubs about 20 km (12 mi) northeast of Chalon-sur-Saône.
The shape of the course resembles the silhouette of a terrier sitting upright, leaning right, with the upper part of a northeastern corner "ear" the only zone in Switzerland, there reaching Saint-Ursanne. In that country it borders or crosses the cantons Jura and Neuchâtel.
Waterfalls and lake
The falls known as the Saut du Doubs is on the French-Swiss border.
Nearby, the river, dammed up by landslide debris, forms the 4-kilometre (2.5 mi) long, 200-metre (660 ft) wide, winding lake, (le) Lac des Brenets. The 27-metre (89 ft)-high Doubs Falls are at the lake's end. The falls can be reached on foot or by passenger boat.[2]
The rate of flow of the Doubs is very seasonally variable. The flooding or well-watered season can stretch from September to May, caused 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 cubic metres per second (710 cu ft/s) to over 1,000 cubic metres per second (35,000 cu ft/s) during floods.
In Besançon, the largest floods have been in 1852 (8.5 metres or 27 feet 11 inches), in 1896 (7.96 metres or 26 feet 1 inch) and in 1910.
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 [fr], 74 metres (243 ft) tall, and the Dam of Refrain, 66.5 metres (218 ft) tall.
In popular culture
The river is mentioned sixteen times in Stendhal's novel The Red and the Black (Le rouge et le noir).
