The Danube

The Danube

The blue Danube River flows gently through the urban area of Vienna. Lush and picturesque scenery lines both banks, and the beautiful Vienna Woods stretch out to the west of the city, dense and shady. Every summer, a variety of colorful music festivals are held here.

The Danube is the second longest river in Europe, only after the Volga. It originates in southern Germany, flowing from west to east through Austria, Slovakia, Hungary, Croatia, Serbia, Bulgaria, Romania, Moldova, and Ukraine, before finally emptying into the Black Sea.

It flows through 10 countries, making it the river with the most riparian nations in the world. Its tributaries extend into seven additional countries — Switzerland, Poland, Italy, Bosnia and Herzegovina, the Czech Republic, as well as Slovenia and Moldova. The river ultimately discharges into the Black Sea at Sulina in eastern Romania, stretching 2,850 kilometers (1,770 miles) in total length, with a drainage basin covering 817,000 square kilometers. Its average annual discharge at the mouth is 6,430 m³/s, and its multi-year average runoff is 203 billion cubic meters.

The Danube (known as Donau or Danube River) is the river that passes through the most countries in the world. In German, it is called Donau; in Czech, Dunaj; in Serbo-Croatian and Bulgarian, Dunav; in Romanian, Dunărea; in Russian, Dunay; and in Slovenian, Donava. The main course of the Danube is divided into three sections: the upper course, from its source to the Hungarian Gate near Bratislava, is about 965.6 kilometers long (from Ulm to the Hungarian Gate, it is 708 kilometers with a drop of 334 meters). The middle course extends from the Hungarian Gate to the Iron Gates, spanning around 954 kilometers with a drop of 94 meters; the lower course lies below the Iron Gates, approximately 930 kilometers long with a drop of 38 meters. The Danube has played a crucial role in the settlement, migration, and political transformation of Central and Southeastern Europe. The castles and fortresses along its banks have marked boundaries between great empires, while its waterways have served as commercial arteries between nations. In the 20th century, it continued to function as a major trade route. The Danube — especially along its upper reaches — has been utilized for hydropower generation, and cities along its banks (including several national capitals such as Vienna in Austria, Bratislava in Slovakia, Budapest in Hungary, and Belgrade in Serbia) have relied on it for economic development.

Color Changes:

Statistics show that the Danube's water changes color eight times a year: it is brown for 6 days, turbid yellow for 55 days, turbid green for 38 days, bright green for 49 days, grass green for 47 days, steel blue for 24 days, gem green for 109 days, and dark green for 37 days.

The blue Danube River flows gently through Vienna, the capital of Austria. This ancient city with a long history features beautiful landscapes, with the lush Vienna Woods sprawling to the west, offering dense shade. A variety of colorful music festivals are held here throughout the summer. Strolling through Vienna’s streets or resting on park benches, one can almost everywhere hear the beautiful melodies of waltzes and see lifelike statues of musicians. Many of Vienna’s streets, parks, theaters, and concert halls are named after musicians. That’s why Vienna has long enjoyed the reputation of being the “World Capital of Music.”

From the Kahlenberg hill in the northwest of the city, a faint mist gives the city a veil of softness. The gleaming ancient palaces, parliaments, mansions, domes, and church steeples — such as those of St. Stephen’s — seem like jewels adorning its head. The Danube is like a jade belt cinched around its waist, and the lush, verdant Vienna Woods stretching into the distance bring to mind the musicians and poets nurtured here… their famous melodies seemingly echoing once again in people’s ears.