Odra () is a

river A river is a natural stream of fresh water that flows on land or inside Subterranean river, caves towards another body of water at a lower elevation, such as an ocean, lake, or another river. A river may run dry before reaching the end of ...

in central

Croatia Croatia, officially the Republic of Croatia, is a country in Central Europe, Central and Southeast Europe, on the coast of the Adriatic Sea. It borders Slovenia to the northwest, Hungary to the northeast, Serbia to the east, Bosnia and Herze ...

. It is long and its basin covers an area of . Its source is in the Žumberak mountain, southwest of

Zagreb Zagreb ( ) is the capital (political), capital and List of cities and towns in Croatia#List of cities and towns, largest city of Croatia. It is in the Northern Croatia, north of the country, along the Sava river, at the southern slopes of the ...

. It flows eastwards, passes south of

Velika Gorica Velika Gorica () is the largest and most populous city in Zagreb County, Croatia. According to the 2011 census, the city itself has a population of 31,341, and the municipality has a population of 63,517 inhabitants. Velika Gorica is the centre ...

, then turns south-east, more or less parallel to the river

Sava The Sava, is a river in Central Europe, Central and Southeast Europe, a right-bank and the longest tributary of the Danube. From its source in Slovenia it flows through Croatia and along its border with Bosnia and Herzegovina, and finally reac ...

. It flows into the river

Kupa The Kupa () or Kolpa ( or ; from in Roman Empire, Roman times; ) river, a right tributary of the Sava, forms a natural border between north-west Croatia and southeast Slovenia. It is long, with a length of serving as the border between Croati ...

near

Odra Sisačka Odra Sisačka ( is a village in Croatia Croatia, officially the Republic of Croatia, is a country in Central Europe, Central and Southeast Europe, on the coast of the Adriatic Sea. It borders Slovenia to the northwest, Hungary to the northe ...

, just northeast of

Sisak Sisak (; also known by other alternative names) is a city in central Croatia, spanning the confluence of the Kupa, Sava and Odra rivers, southeast of the Croatian capital Zagreb, and is usually considered to be where the Posavina (Sava basin ...

, also just before the Kupa joins the river Sava. The upper flow of Odra has been significantly altered by humans, by the digging of the long canal Sava-Odra(-Sava) south of Zagreb, as a measure against flooding (designed taking into account the maximum flows of

1964 Events January * January 1 – The Federation of Rhodesia and Nyasaland is dissolved. * January 5 – In the first meeting between leaders of the Roman Catholic and Orthodox churches since the fifteenth century, Pope Paul VI and Patria ...

, 1973 and 1974, and first put to use in 1979). There is no certain etymology for the river's name, it could be Slavic or pre-Slavic, and 20th-century linguists did not have a consensus about it.

References

Rivers of Croatia Landforms of Zagreb County {{Croatia-river-stub