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  1. Map of most important tributaries of the Danube. This is a list of tributaries of the Danube by order of entrance.. The Danube is Europe's second-longest river.It starts in the Black Forest in Germany as two smaller rivers—the Brigach and the Breg—which join at Donaueschingen, and it is from here that it is known as the Danube, flowing generally eastwards for a distance of some 2,850 km ...

    River
    Entering The Danube At
    Distance From Mouth (sulina) (km)
    Breg (right main headwater)
    2810
    Brigach (left main headwater)
    Donaueschingen
    2810
    left
    right
  2. Main-Danube Canal, commercial waterway in the southern German state of Bavaria. Completed in 1992, the canal is 171 km (106 miles) long and runs from Bamberg on the Main River (a tributary of the Rhine River) to Kelheim on the Danube River, permitting traffic to flow between the North Sea and the Black Sea.

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    • Overview
    • Physiography

    Danube River, river, the second longest in Europe after the Volga. It rises in the Black Forest mountains of western Germany and flows for some 1,770 miles (2,850 km) to its mouth on the Black Sea. Along its course it passes through 10 countries: Germany, Austria, Slovakia, Hungary, Croatia, Serbia, Bulgaria, Romania, Moldova, and Ukraine.

    The Danube played a vital role in the settlement and political evolution of central and southeastern Europe. Its banks, lined with castles and fortresses, formed the boundary between great empires, and its waters served as a vital commercial highway between nations. The river’s majesty has long been celebrated in music. The famous waltz An der schönen, blauen Donau (1867; The Blue Danube), by Johann Strauss the Younger, became the symbol of imperial Vienna. In the 21st century the river has continued its role as an important trade artery. It has been harnessed for hydroelectric power, particularly along the upper courses, and the cities along its banks—including the national capitals of Vienna (Austria), Budapest (Hungary), and Belgrade (Serbia)—have depended upon it for their economic growth.

    The Danube’s vast drainage of some 315,000 square miles (817,000 square km) includes a variety of natural conditions that affect the origins and the regimes of its watercourses. They favour the formation of a branching, dense, deepwater river network that includes some 300 tributaries, more than 30 of which are navigable. The river basin expands unevenly along its length. It covers about 18,000 square miles (47,000 square km) at the Inn confluence, 81,000 square miles (210,000 square km) after joining with the Drava, and 228,000 square miles (590,000 square km) below the confluences of its most affluent tributaries, the Sava and the Tisza. In the lower course the basin’s rate of growth decreases. More than half of the entire Danube basin is drained by its right-bank tributaries, which collect their waters from the Alps and other mountain areas and contribute up to two-thirds of the total river runoff or outfall.

    Three sections are discernible in the river’s basin. The upper course stretches from its source to the gorge called the Hungarian Gates, in the Austrian Alps and the Western Carpathian Mountains. The middle course runs from the Hungarian Gates Gorge to the Iron Gate in the Southern Romanian Carpathians. The lower course flows from the Iron Gate to the deltalike estuary at the Black Sea.

    Britannica Quiz

    Water and its Varying Forms

    The upper Danube springs as two small streams—the Breg and Brigach—from the eastern slopes of the Black Forest mountains of Germany, which partially consist of limestone. From Donaueschingen, where the headstreams unite, the Danube flows northeastward in a narrow, rocky bed. To the north rise the wooded slopes of the Swabian and the Franconian mountains. Between Ingolstadt and Regensburg the river forms a scenic canyonlike valley. To the south of the river course stretches the large Bavarian Plateau, covered with thick layers of river deposits from the numerous Alpine tributaries. The bank is low and uniform, composed mainly of fields, peat, and marshland.

    At Regensburg the Danube reaches its northernmost point, from which it veers south and crosses wide, fertile, and level country. Shortly before it reaches Passau on the Austrian border, the river narrows and its bottom abounds with reefs and shoals. The Danube then flows through Austrian territory, where it cuts into the slopes of the Bohemian Forest and forms a narrow valley. In order to improve navigation, dams and protecting dikes have been built near Passau, Linz, and Ardagger. The upper Danube, some 600 miles (965 km) long, has a considerable average inclination of the riverbed (0.93 percent) and a rapid current of two to five miles per hour. Depths vary from 3 to 26 feet (1 to 8 metres). The Danube swells substantially at Passau where the Inn River, its largest upstream tributary, carries more water than the main river. Other major tributaries in the upper Danube course include the Iller, Lech, Isar, Traun, Enns, and Morava rivers.

  4. Tributaries of the Danube–Black Sea Canal‎ (4 P) Drava‎ (3 C, 4 P) Tributaries of the Drava‎ (1 C, 22 P) E. Tributaries of the Enns‎ (4 P) G.

  5. Danube River - Hydrology, Tributaries, Basin: The different physical features of the river basin affect the amount of water runoff in its three sections. In the upper Danube the runoff corresponds to that of the Alpine tributaries, where the maximum occurs in June when melting of snow and ice in the Alps is the most intensive.

  6. Jul 7, 2021 · 4.2 The Danube Tributaries and Canals. The Danube has more than 30 navigable tributaries, but only those having the ECE class III and above are given in Table 2.3. Concerning the canals, of primary interest are obviously the 171 km long Main-Danube (MD) canal and 64 km long Danube-Black sea canal; their data of interest are given in Table 2.2.

  7. en.wikipedia.org › wiki › DanubeDanube - Wikipedia

    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.

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