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The Danube

The Danube is the second-longest European river after the Volga. Depending on the definition adopted, it is either 2,845 or 2,888 kilometres long (see Danube Springs). The Danube originates in the Black Forest. It crosses the Northern Alpine Foothills, the Pannonian Plain and the Romanian Lowlands, in the process draining large parts of Southern Central Europe and South-eastern Europe. The Danube debouches into the Black Sea in a vast delta.

Geographic position

Length of river course

Danube Springs

Extension of Danube Basin

Central and South-eastern Europe

2,845 or 2,888 km

Donaueschingen and Furtwangen

795,686 sq km

 

 


 

 

Drinking water abstraction from the Danube

Along its course, the Danube serves as an important drinking water resource for approx. 10 million people. In Baden-Württemberg, the association Zweckverband Wasserversorgung supplies the entire area extending between Stuttgart, Bad Mergentheim, Aalen and the district Alb-Donau-Kreis with drinking water. Over 30% of this water (30 million cubic metres in 2004) is treated Danube water. Cities like Ulm or Passau, too, still use the Danube for a large share of their drinking water production.

Conversely, Austria produces 99% of its drinking water from groundwater and springs; water is abstracted from the Danube for drinking water purposes only very rarely, e.g. during heat waves. The same holds for Hungary, where groundwater is used to cover 91% of the drinking water demand. Due to heavy contamination, the other countries along the middle course of the river equally refrain from using Danube water for drinking water purposes. Only Romanian settlements on the Danube, which is cleaner in that region, are still largely supplied with Danube water (Drobeta-Turnu Severin, Danube Delta). 

Staaten des Einzugsgebietes

The Danube flows through six countries – Germany, Austria, Slovakia, Hungary, Serbia and Romania – and is a border river for another four states: Croatia, Bulgaria, Moldova and Ukraine. In all, national borders make up 1,071 kilometres or 37% of the course of the Danube.


Important tributaries

 

Right-bank tributaries

 

Lech

Isar

Inn

Enns

Leitha/Schwarza

Drau

Save

March

 

D/A

D/A

CH/D/A

A

A

I/A/SK/HR/H

SK/HR/BiH/SR

CZ/SK/A

Length

264 km

295 km

517 km

254 km

78 km

749 km

945 km

358 km

Chatchment

3,926 sq km

8,370 sqkm

25,700 sq km

5,940 sq km

507 sq km

11,828 sq km

95,419 sq km

27,633 sq km

 Left-bank tributaries

Kamp

Theiß

A

UA/R/SK/H/SR 

 153 km

1,308 km

 1,753 sq km

146,500 sq km



              

 

 

 

 

 

 

 

 





Picture: wikipedia.at