The Osha () 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 ...

Omsk Oblast Omsk Oblast () is a federal subjects of Russia, federal subject of Russia (an oblast), located in southwestern Siberia. The oblast has an area of . Its population is 1,977,665 (Russian Census (2010), 2010 Census) with the majority, 1.12 million, ...

Russia Russia, or the Russian Federation, is a country spanning Eastern Europe and North Asia. It is the list of countries and dependencies by area, largest country in the world, and extends across Time in Russia, eleven time zones, sharing Borders ...

, a left tributary of the

Irtysh The Irtysh is a river in Russia, China, and Kazakhstan. It is the chief tributary of the Ob (river), Ob and is also the longest tributary in the world. The river's source lies in the Altai Mountains, Mongolian Altai in Dzungaria (the northern p ...

.Article
in the

Great Soviet Encyclopedia The ''Great Soviet Encyclopedia'' (GSE; , ''BSE'') is one of the largest Russian-language encyclopedias, published in the Soviet Union from 1926 to 1990. After 2002, the encyclopedia's data was partially included into the later ''Great Russian Enc ...

It is long, and has a

drainage basin A drainage basin is an area of land in which all flowing surface water converges to a single point, such as a river mouth, or flows into another body of water, such as a lake or ocean. A basin is separated from adjacent basins by a perimeter, ...

of . The river flows across lake Tenis.Water of Russia - Тенис
(in Russian)

References

{{reflist Rivers of Omsk Oblast