The Danube ( ) is Europe's second longest river after the Volga. It is classified as an international waterway.
The river originates in the Black Forest in Germany as the much smaller Brigach and Breg rivers which join at the German town of Donaueschingen. After that it is known as the Danube and flows southeastward for a distance of some 2850 km (1771 miles), passing through four Central and Eastern European capitals, before emptying into the Black Sea via the Danube Delta in Romania and Ukraine.
Known to history as one of the long-standing frontiers of the Roman Empire, the river flows through or acts as part of the borders of ten countries: Germany (7.5%), Austria (10.3%), Slovakia (5.8%), Hungary (11.7%), Croatia (4.5%), Serbia (10.3%), Bulgaria (5.2%), Moldova (1.6%), Ukraine (3.8%) and Romania (28.9%). (The percentages reflect the proportion of the total Danube drainage basin area).
The name Dānuvius is presumably a loan from Celtic (Gaulish), or possibly Iranic. It is one of a number of river names derived from a Proto-Indo-European language word *dānu, apparently a term for "river", but possibly also of a primeval cosmic river, and of a river goddess (see Danu (Asura)), perhaps from a root *dā "to flow/swift, rapid, violent, undisciplined." Other river names with the same etymology include Don, Donets, Dnieper and Dniestr. Dniepr,(pre-Slavic Danapir by Gothic historian Jordanes) and Dniestr, from Danapris and Danastius, are presumed from Scythian Iranic *Dānu apara "posterior river" and *Dānu nazdya- "anterior river", respectively.
The Ancient Greek Istros was a borrowing from Thracian/Dacian meaning "strong, swift", akin to Sanskrit is.iras "swift".
Since the Norman conquest of England, the English language has used the Latin-derived word Danube. In the languages of the modern countries through which the river flows, it is: (transliterated: Dunav) , or (transliterated: Dunai)
The Danube flows through the following countries and cities (ordered from the source to mouth):
The Danube flows through four capital cities (shown in bold), more than any river in the world.
The hydrological parameters of Danube are regularly monitored in Croatia at Batina, Dalj, Vukovar and Ilok.
===Sectioning===
Since the completion of the German Rhine–Main–Danube Canal in 1992, the river has been part of a trans-European waterway from Rotterdam on the North Sea to Sulina on the Black Sea (3500 km). In 1994 the Danube was declared one of ten Pan-European transport corridors, routes in Central and Eastern Europe that required major investment over the following ten to fifteen years. The amount of goods transported on the Danube increased to about 100 million tons in 1987. In 1999, transport on the river was made difficult by the NATO bombing of three bridges in Serbia. The clearance of the debris was finished in 2002. The temporary pontoon bridge that hampered navigation was removed in 2005.
At the Iron Gate, the Danube flows through a gorge that forms part of the boundary between Serbia and Romania; it contains the Iron Gate I Hydroelectric Power Station dam, followed at about 60 km downstream (outside the gorge) by the Iron Gate II Hydroelectric Power Station. On 13 April 2006, a record peak discharge at Iron Gate Dam reached 15,400 m³/s.
There are three artificial waterways built on the Danube: the Danube–Tisa–Danube Canal (DTD) in the Banat and Bačka regions (Vojvodina, northern province of Serbia); the 64 km Danube–Black Sea Canal, between Cernavodă and Constanţa (Romania) finished in 1984, shortens the distance to the Black Sea by 400 km; the Rhine-Main-Danube Canal (about 171 km), finished in 1992, linking the North Sea to the Black Sea.
The commission dates to the Paris Conferences of 1856 and 1921, which established for the first time an international regime to safeguard free navigation on the Danube.
Before the last ice age in the Pleistocene, the Rhine started at the southwestern tip of the Black Forest, while the waters from the Alps that today feed the Rhine were carried east by the so-called Urdonau (original Danube). Parts of this ancient river's bed, which was much larger than today's Danube, can still be seen in (now waterless) canyons in today's landscape of the Swabian Alb. After the Upper Rhine valley had been eroded, most waters from the Alps changed their direction and began feeding the Rhine. Today's upper Danube is but a meek reflection of the ancient one.
Since the Swabian Alb is largely shaped of porous limestone, and since the Rhine's level is much lower than the Danube's, today subsurface rivers carry much water from the Danube to the Rhine. On many days in the summer, when the Danube carries little water, it completely oozes away noisily into these underground channels at two locations in the Swabian Alp, which are referred to as the de:Donauversickerung (Danube Sink). Most of this water resurfaces only 12 km south at the Aachtopf, Germany's wellspring with the highest flow, an average of 8500 litres per second, north of Lake Constance—thus feeding the Rhine. The European Water Divide applies only for those waters that pass beyond this point, and only during the days of the year when the Danube carries enough water to survive the sink holes in the Donauversickerung.
Since such large volumes of underground water erode much of the surrounding limestone, it is estimated that the Danube upper course will one day disappear entirely in favor of the Rhine, an event called stream capturing.
==History== The Danube basin was the site of some of the earliest human cultures. The Danubian Neolithic cultures include the Linear Pottery cultures of the mid-Danube basin. The third millennium BC Vučedol culture (from the Vučedol site near Vukovar, Croatia) is famous for its ceramics. Many sites of the sixth-to-third millennium BC Vinča culture, (Vinča, Serbia) are sited along the Danube. The river was part of the Roman Empire's Limes Germanicus. The Romans often used the river Danube as a northern border for their empire.
Alexander the Great defeated the Triballian king Syrmus and the northern barbarian Thracian and Illyrian tribes by advancing from Macedonia as far as the Danube in 336BC.
At the end of the Okeanos Potamos, is the holy island of Alba (Leuke, Pytho Nisi, Isle of Snakes), sacred to the Pelasgian (and later, Greek) Apollo, greeting the sun rising in the east. Hecateus Abderitas refers to Apollo's island from the region of the Hyperboreans, in the Okeanos. It was on Leuke, in one version of his legend, that the hero Achilles was buried (to this day, one of the mouths of the Danube is called Chilia). Old Romanian folk songs recount a white monastery on a white island with nine priests.
In Austria and Hungary, most water is drawn from ground and spring sources, and only in rare cases is water from the Danube used. Most states also find it too difficult to clean the water because of extensive pollution; only parts of Romania where the water is cleaner still use a lot of drinking water from the Danube.
Downstream from the Freudenau River plant's locks in Vienna, canalization of the Danube was limited to the Gabčíkovo dam and locks near Bratislava and the two double Iron Gate locks in the border stretch of the Danube between Serbia and Romania. These locks have larger dimensions (similar to the locks in the Russian Volga river, some 300 by over 30 m). Downstream of the Iron Gate, the river is free flowing all the way to the Black Sea, a distance of more than 860 kilometres.
The Danube connects with the Rhine–Main–Danube Canal at Kelheim, and with the Wiener Donaukanal in Vienna. Apart from a couple of secondary navigable branches, the only major navigable rivers linked to the Danube are the Drava, Sava and Tisa. In Serbia, a canal network also connects to the river; the network, known as the Dunav-Tisa-Dunav canals, links sections downstream.
The Danube Bike Trail (also called Danube Cycle Path or the Donauradweg) is a bicycle trail along the river. It is divided into four sections: #Donaueschingen-Passau (559 km) #Passau-Vienna (340 km) #Vienna-Budapest (306 km) #Budapest-Black Sea (1670 km)
The Waves of the Danube () is a waltz by the Romanian composer Ion Ivanovici (1845–1902). When performed at the 1889 Paris Exposition, the work took the audience by a storm.
There are also Hasidic (Chabad Nigunnim) songs which are called "dunai", dating from around 200 years ago. They are often lullabys and are named after the Dunay river. Farmers around the river used to come to the river and sing spiritual songs to thank their god about the great beauty which they saw every day.
International organizations
Individual cities or countries
Category:Bačka Category:Banat Category:Rivers of Serbia Category:Rivers of Baden-Württemberg Category:Rivers of Bavaria Category:Geography of Vojvodina Category:Rivers of Austria Category:Rivers of Bulgaria Category:Rivers of Croatia Category:Rivers of Germany Category:Rivers of Hungary Category:Rivers of Moldova Category:Rivers of Romania Category:Rivers of Slovakia Category:Rivers of Ukraine Category:International rivers of Europe Category:Syrmia Category:Bács-Kiskun Category:Bulgaria–Romania border Category:Croatia–Serbia border Category:Hungary–Slovakia border Category:Romania–Ukraine border Category:Romania–Serbia border
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