Danube

Danube
The Danube in Budapest
Course of the Danube
Native name	Donau (German) Dunaj (Slovak) Duna (Hungarian) Dunav (Croatian) Дунав (Serbian) Дунав (Bulgarian) Dunărea (Romanian) Дунай (Ukrainian)
Location
Countries	Germany Austria Slovakia Hungary Croatia Serbia Bulgaria Romania Moldova Ukraine
Cities	Ulm Ingolstadt Regensburg Passau Linz Vienna Bratislava Győr Komárno Budapest Dunaújváros Mohács Apatin Vukovar Ilok Bačka Palanka Novi Sad Sremski Karlovci Belgrade Pančevo Smederevo Drobeta-Turnu Severin Vidin Giurgiu Ruse Silistra Călărași Brăila Galați Reni Izmail Kiliia Tulcea Sulina
Physical characteristics
Source	Breg
• location	Furtwangen im Schwarzwald, Baden-Württemberg, Germany
• coordinates	48°05′44″N 08°09′18″E / 48.09556°N 8.15500°E / 48.09556; 8.15500
• elevation	1,078 m (3,537 ft)
2nd source	Brigach
• location	St. Georgen im Schwarzwald, Baden-Württemberg, Germany
• coordinates	48°06′24″N 08°16′51″E / 48.10667°N 8.28083°E / 48.10667; 8.28083
• elevation	940 m (3,080 ft)
Source confluence
• location	Donaueschingen, Baden-Württemberg, Germany
• coordinates	47°57′03″N 08°31′13″E / 47.95083°N 8.52028°E / 47.95083; 8.52028
Mouth	Danube Delta
• location	Romania
• coordinates	45°13′3″N 29°45′41″E / 45.21750°N 29.76139°E / 45.21750; 29.76139
Length	2,850 km (1,770 mi)[1]
Basin size	801,463 km2 (309,447 sq mi)[2]
Width
• minimum	Middle Danube (Iron Gates) 150 m (490 ft); Lower Danube (Brăila) 400 m (1,300 ft)[3]
• average	Upper Danube 300 m (980 ft); Middle Danube 400–800 m (1,300–2,600 ft); Lower Danube 900–1,000 m (3,000–3,300 ft)[4][3][2]
• maximum	Middle Danube 1,500 m (4,900 ft); Lower Danube 1,700 m (5,600 ft)[2][3]
Depth
• minimum	1 m (3 ft 3 in) (Upper Danube)[2]
• average	Upper Danube 8 m (26 ft); Middle Danube 6–10 m (20–33 ft), 53 m (174 ft) (Iron Gates); Lower Danube 9 m (30 ft)[4][3][2][5]
• maximum	Middle Danube (Iron Gates) 90 m (300 ft); Lower Danube 34 m (112 ft)[3]
Discharge
• location	Danube Delta
• average	(Period: 1931–2020)6,452 m3/s (227,900 cu ft/s)[7][8]
• minimum	1,790 m3/s (63,000 cu ft/s)[6][7]
• maximum	15,900 m3/s (560,000 cu ft/s)[6][7]
Discharge
• location	Belgrade
• average	(Period: 1931–2020)5,300 m3/s (190,000 cu ft/s)[7]
Discharge
• location	Budapest
• average	(Period: 1931–2020)2,350 m3/s (83,000 cu ft/s)[7]
Discharge
• location	Vienna
• average	(Period: 1931–2020)1,920 m3/s (68,000 cu ft/s)[7]
Discharge
• location	Passau (Bavaria, 30 km before town)
• average	(Period: 1931–2020)580 m3/s (20,000 cu ft/s)[7]
Basin features
Progression	Black Sea
River system	Danube River

v t e Danube summary route map
Legend
km 2860 Source at Donaueschingen 2587 Limit of navigation at Ulm 2458 Ingolstadt 2411 Rhine–Main–Danube Canal 2376 Regensburg 2226 River Inn Germany Austria 2128 Linz 1918 Vienna Austria Slovakia River Morava 1867 Bratislava Slovakia Hungary 1794 Győr 1639 Budapest 1579 Dunaújváros Hungary Croatia 1433 Hungary Serbia 1425 Danube–Tisa–Danube Canal 1424 Bezdan Bridge 1382 River Drava 1367 Bogojevo Road Bridge 1366 Bogojevo Railway Bridge 1335 Vukovar 1297 Ilok–Bačka Palanka Bridge Croatia Serbia 1296 in Serbia 1258 Liberty Bridge 1255 Varadin Bridge 1254 Novi Sad 1254 Žeželj Bridge 1253 Danube–Tisa–Danube Canal 1232 Beška Bridge 1215 River Tisza 1176 Pupin Bridge 1173 Zemun 1170 River Sava 1169 Belgrade 1167 Pančevo Bridge 1153 Pančevo 1104 River Great Morava 1116 Smederevo 1113 Pipeline bridge 1112 Kovin Bridge 1077 Danube–Tisa–Danube Canal 1076 Serbia Romania 943 Iron Gate I 930 Drobeta-Turnu Severin 863 Iron Gate II Serbia Bulgaria 846 796 New Europe Bridge River Olt 495 Ruse 489 Danube Bridge Bulgaria Romania 300 Anghel Saligny Bridge 300 Cernavodă Bridge 238 Giurgeni–Vadu Oii Bridge Romania Moldova Moldova Ukraine Danube Delta (Romania/Ukraine) 0 Black Sea
Note: Distances are in kilometers, rounded to the nearest kilometer. Waterway distances are shown, not towpath distances. Country capitals are shown in bold.

The Danube (/ˈdæn.juːb/ DAN-yoob; see also other names) is the second-longest river in Europe, after the Volga in Russia. It flows through Central and Southeastern Europe, from the Black Forest south into the Black Sea. A large and historically important river, it was once a frontier of the Roman Empire. In the 21st century, it connects ten European countries, running through their territories or marking a border. Originating in Germany, the Danube flows southeast for 2,850 km (1,770 mi), passing through or bordering Austria, Slovakia, Hungary, Croatia, Serbia, Romania, Bulgaria, Moldova, and Ukraine. Among the many cities on the river are four national capitals: Vienna, Bratislava, Budapest, and Belgrade. Its drainage basin amounts to 817,000 km² (315,000 sq mi) and extends into nine more countries.

The Danube's longest headstream Breg rises in Furtwangen im Schwarzwald, while the river carries its name from its source confluence in the palace park in Donaueschingen onwards. Since ancient times, the Danube has been a traditional trade route in Europe. Today, 2,415 km (1,501 mi) of its total length are navigable. The Danube is linked to the North Sea via the Rhine–Main–Danube Canal, connecting the Danube at Kelheim with the Main at Bamberg. The river is also an important source of hydropower and drinking water.

The Danube river basin is home to such fish species as pike, zander, huchen, Wels catfish, burbot and tench. It is also home to numerous diverse carp and sturgeon, as well as salmon and trout. A few species of euryhaline fish, such as European seabass, mullet, and eel, inhabit the Danube Delta and the lower portion of the river.