Ruhr (river)

Ruhr
The Ruhr in Essen-Kettwig.
Origin	Sauerland
Mouth	Rhine 51°27′3″N 6°43′22″E / 51.45083°N 6.72278°E / 51.45083; 6.72278Coordinates: 51°27′3″N 6°43′22″E / 51.45083°N 6.72278°E / 51.45083; 6.72278
Basin countries	Germany
Length	217 km
Source elevation	674 m
Avg. discharge	79 m³/s
Basin area	4,485 km²

The drainage basin of the Ruhr

The Ruhr is a medium-size river in western Germany (North Rhine-Westphalia), a right tributary (east-side) of the Rhine.

Description

The source of the Ruhr is near the town of Winterberg in the mountainous Sauerland region, at an elevation of approximately 2,200 feet (670 m). It flows into the lower Rhine river at an elevation of only 56 feet (17 m) in the municipal area of Duisburg. Its total length is 218 km (135 mi), its average discharge is 79 m³/s (cubic metres per second) at Mülheim near its mouth. Thus, its discharge is, for example, comparable to that of the Ems river in Northern Germany or the Thames river in the United Kingdom.

Towns

The Ruhr first passes the towns of Meschede, Arnsberg, Wickede, Fröndenberg, Holzwickede, Iserlohn and Schwerte.

Then the river marks the southern limit of the Ruhr area, passing Hagen, Dortmund, Herdecke, Wetter, Witten, Bochum, Hattingen, Essen, Mülheim and Duisburg.

The Ruhr Area was Germany's main industrial zone during the early 1900s. Most factories were located there. Occupation of the Ruhr in the 1920s by French forces caused passive resistance, which saw production in the factories grind to a halt. As a result, the hyperinflation crisis grew even worse.

Lakes

There are five Ruhr reservoirs on the river, often used for leisure activities.

• Hengsteysee between Dortmund and Hagen, surface area: 1.36 km² height of the weir 4.5m
• Harkortsee between Herdecke and Wetter; surface area: 1.37 km², height of the weir 7.8m
• Kemnader See between Witten and Bochum; surface area: 1.25 km², height of the weir 2m
• Baldeneysee in Essen-Werden; surface area: 2.64 km², height of the weir 8.5m
• Kettwiger See in Essen-Kettwig; surface area: 0.55 km², height of the weir 6m

The Ruhr valley near Bochum during a flood

See also

• Ruhr (area)
• Occupation of the Ruhr (1923–1924)
• Nearby rivers: Rhine, Lenne, Lippe River, Emscher.

External links

Media related to Ruhr at Wikimedia Commons

•  Chisholm, Hugh, ed. (1911). "Ruhr". Encyclopædia Britannica (11th ed.). Cambridge University Press. 

Tributaries of the Rhine Left (western) Alpine Rhine Vorderrhein 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) Alpine Rhine Rein da Tuma Rein da Curnera Rein da Medel Glenner Rabiusa Hinterrhein Plessur Landquart Ill Frutz Lake Constance Dornbirner Ach Bregenzer Ach Leiblach Argen Schussen Rotach Linzer 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