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Oder
Oder near the city of Wrocław, Poland
Polen = Poland, Deutschland = Germany, and Tschechien = Czech Republic
Native name	Odra
Location
Country	Poland, Czech Republic, Germany
Physical characteristics
Source
- location	Fidlův kopec, Oderské vrchy, Nízký Jeseník, Olomouc District, Olomouc Region, Moravia, Czech Republic
- coordinates	49°36′47″N 017°31′15″E / 49.61306°N 17.52083°E / 49.61306; 17.52083
- elevation	634 m (2,080 ft)
Mouth	Szczecin Lagoon
- location	Baltic Sea, Poland
- coordinates	53°40′19″N 14°31′25″E / 53.67194°N 14.52361°E / 53.67194; 14.52361Coordinates: 53°40′19″N 14°31′25″E / 53.67194°N 14.52361°E / 53.67194; 14.52361
Length	840 km (520 mi)
Basin size	119,074 km2 (45,975 sq mi)
Discharge
- location	Mouth
- average	567 m3/s (20,000 cu ft/s)

The Oder (/ˈoʊdər/; Czech, Lower Sorbian and Polish: Odra, German: Oder, Upper Sorbian: Wódra)^[1] is a river in Central Europe and Poland's third-longest river after the Vistula and Warta.^[2] It rises in the Czech Republic and flows 742 kilometres (461 mi) through western Poland, later forming 187 kilometres (116 mi) of the border between Poland and Germany as part of the Oder–Neisse line.^[3] The river ultimately flows into the Szczecin Lagoon north of Szczecin and then into three branches (the Dziwna, Świna and Peene) that empty into the Bay of Pomerania of the Baltic Sea.

Names

The Oder is known by several names in different languages, but the modern ones are very similar: English and German: Oder; Czech, Polish, and Lower Sorbian: Odra, Upper Sorbian: Wódra; Kashubian: Òdra (pronounced [ˈwɛdra]); Medieval Latin: Od(d)era; Renaissance Latin: Viadrus (invented in 1534).

Ptolemy knew the modern Oder as the Συήβος (Suebos; Latin Suevus), a name apparently derived from the Suebi, a Germanic people. While he also refers to an outlet in the area as the Οὐιαδούα Ouiadoua (or Οὐιλδούα Ouildoua; Latin Viadua or Vildua), this was apparently the modern Wieprz, as it was said to be a third of the distance between the Suebos and Vistula.^[4][5] The name Suebos may be preserved in the modern name of the Świna river (German Swine), an outlet from the Szczecin Lagoon to the Baltic.

In the Old Church Slavonic language, the name of the river is Vjodr.^[6]

Geography

Oder in Wrocław, overlooking Ostrów Tumski - Cathedral Island

The Oder is 840 kilometres (522 miles) long: 112 km (70 miles) in the Czech Republic, 726 km (451 miles) in Poland (including 187 km (116 miles) on the border between Germany and Poland) and is the third longest river located within Poland (after the Vistula and Warta), however, second longest river overall taking into account its total length, including parts in neighbouring countries.^[3] It drains a basin of 119,074 square kilometres (45,975 sq mi), 106,043 km² (40,943 sq mi) of which are in Poland (89%),^[3] 7,246 km² (2,798 sq mi) in the Czech Republic (6%), and 5,587 km² (2,157 sq mi) in Germany (5%). Channels connect it to the Havel, Spree, Vistula system and Kłodnica. It flows through Silesian, Opole, Lower Silesian, Lubusz, and West Pomeranian voivodeships of Poland and the states of Brandenburg and Mecklenburg-Vorpommern in Germany.

The main branch empties into the Szczecin Lagoon near Police, Poland. The Szczecin Lagoon is bordered on the north by the islands of Usedom (west) and Wolin (east). Between these two islands, there is only a narrow channel (Świna) going to the Bay of Pomerania, which forms a part of the Baltic Sea.

The largest city on the Oder is Wrocław, in Lower Silesia.

Navigation

The Oder dividing Poland and Germany seen from the Polish side near Kostrzyn (Küstrin)

Estuary of the Lusatian Neisse into the Oder

The Oder is navigable over a large part of its total length, as far upstream as the town of Koźle, where the river connects to the Gliwice Canal. The upstream part of the river is canalized and permits larger barges (up to CEMT Class IV) to navigate between the industrial sites around the Wrocław area.

Further downstream the river is free flowing, passing the towns of Eisenhüttenstadt (where the Oder–Spree Canal connects the river to the Spree in Berlin) and Frankfurt upon Oder. Downstream of Frankfurt the river Warta forms a navigable connection with Poznań and Bydgoszcz for smaller vessels. At Hohensaaten the Oder–Havel Canal connects with the Berlin waterways again.

Near its mouth the Oder reaches the city of Szczecin, a major maritime port. The river finally reaches the Baltic Sea through the Szczecin Lagoon and the river mouth at Świnoujście.^[7]

History

Under Germania Magna the river was known to the Romans as the Viadrus or Viadua in Classical Latin, as it was a branch of the Amber Road from the Baltic Sea to the Roman Empire. In Germanic languages, including English, it was and still is called the Oder, written in medieval Latin documents as Odera or Oddera. Most notably, it was mentioned in the Dagome iudex, which described territory of the Duchy of Poland under Duke Mieszko I in A.D. 990, as a part of duchy's western frontier.

Before Slavs settled along its banks, the Oder was an important trade route and towns in Germania were documented along with many tribes living between the rivers Albis (Elbe), Oder, and Vistula. Centuries later, after Germanic tribes, the Bavarian Geographer (ca. 845) specified the following West Slavic peoples: Sleenzane, Dadosesani, Opolanie, Lupiglaa, and Golensizi in Silesia and Wolinians with Pyrzycans in Western Pomerania. A document of the Bishopric of Prague (1086) mentions Zlasane, Trebovyane, Poborane, and Dedositze in Silesia.

In the 13th century, the first dams were built to protect agricultural lands.

The Finow Canal, first built in 1605, connects the Oder and Havel. After completion of the more straight Oder–Havel Canal in 1914, its economic relevance decreased.

The earliest important undertaking with a view to improving the waterway was initiated by Frederick the Great, who recommended diverting the river into a new and straight channel in the swampy tract known as Oderbruch near Küstrin. The work was carried out in the years 1746–53, a large tract of marshland being brought under cultivation, a considerable detour cut off and the main stream successfully confined to a canal.

In the late 19th century, three additional alterations were made to the waterway:

• The canalization of the main stream at Breslau, and from the confluence of the Glatzer Neisse to the mouth of the Klodnitz Canal, a distance of over 50 miles (80 km). These engineering works were completed in 1896.


• During 1887–91 the Oder–Spree Canal was made to connect the two rivers.


• The deepening and regulation of the mouth and lower course of the stream.

The Oder in Szczecin, Poland, flows along the banks of the Old Town and the Ducal Castle

By the Treaty of Versailles, navigation on the Oder became subject to International Commission of the Oder.^[8] Following the articles 363 and 364 of the Treaty Czechoslovakia was entitled to lease in Stettin (now Szczecin) its own section in the harbour, then called Tschechoslowakische Zone im Hafen Stettin.^[9] The contract of lease between Czechoslovakia and Germany, and supervised by the United Kingdom, was signed on February 16, 1929, and would end in 2028, however, after 1945 Czechoslovakia did not regain this legal position, de facto abolished in 1938–39.

At the 1943 Tehran Conference the allies decided that the new Eastern border of Germany would run along the Oder^[10] but after World War II, the Oder and the Lusatian Neisse formed the Oder–Neisse line, which was designated by the victorious allies at the Potsdam Conference as the new border between Poland and Germany. A significant percentage of the German populations east of these two rivers were evacuated by the Nazis or fled before the approaching Red Army. After the war, the remaining population was forcibly expelled in accordance with the Potsdam Agreement.^[11] East Germany confirmed the border with Poland in 1950, then West Germany, after a period of refusal, finally accepted the border in 1970. In 1990 newly reunified Germany and the Republic of Poland signed a treaty recognizing it as their border.

Cities

Łarpia, a left distributary of the Oder in Police, Poland

Main section:

Ostrava – Bohumín – Racibórz – Kędzierzyn-Koźle – Krapkowice – Opole – Brzeg – Oława – Jelcz-Laskowice – Wrocław – Brzeg Dolny – Ścinawa – Szlichtyngowa – Głogów – Bytom Odrzański – Nowa Sól – Zielona Góra – Krosno Odrzańskie – Eisenhüttenstadt – Frankfurt (Oder) – Słubice – Kostrzyn – Cedynia – Schwedt – Vierraden – Gartz – Gryfino – Szczecin – Police

Dziwna branch (between Wolin Island and mainland Poland):

Wolin – Kamień Pomorski – Dziwnów

Świna branch (between Wolin and the Usedom islands):

Świnoujście

Szczecin Lagoon:

Nowe Warpno – Ueckermünde

Peene branch (between Usedom Island and the German mainland):

Usedom – Lassan – Wolgast

Eastern tributaries

Ostravice – Olza – Ruda – Bierawka – Kłodnica – Czarnka – Mała Panew – Stobrawa – Widawa – Jezierzyca – Barycz – Krzycki Rów – Obrzyca – Jabłonna – Pliszka – Ołobok – Gryżynka – Warta with the Noteć – Myśla – Kurzyca – Stubia – Rurzyca – Tywa – Płonia – Ina – Gowienica - Śmieszka

Western tributaries

Opava – Psina (Cyna) – Cisek – Olszówka – Stradunia – Osobłoga – Prószkowski Potok – Nysa Kłodzka – Oława – Ślęza – Bystrzyca – Średzka Woda – Cicha Woda – Kaczawa – Ślepca – Zimnica – Dębniak – Biała Woda – Czarna Struga – Śląska Ochla – Zimny Potok – Bóbr – Olcha – Racza – Lusatian Neisse – Finow – Gunica

See also

Wikimedia Commons has media related to Oder River.

• List of rivers of Germany


• List of rivers of Poland


• Lower Oder Valley National Park


• Oder–Neisse line


• Odra Wodzisław


• 
  Ostrów Grabowski, a river island in Szczecin
  

Notes

External links

• multilingual information site on the Oder


• Odra electronic shipping guide


• 
  Bibliography on Water Resources and International Law Peace Palace Library

 This article incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). "Oder" . Encyclopædia Britannica. 20 (11th ed.). Cambridge University Press. pp. 2–3.