The Osha (russian: Оша) is a

river A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of wate ...

Omsk Oblast Omsk Oblast (russian: О́мская о́бласть, ''Omskaya oblast'') is a federal subject of Russia (an oblast), located in southwestern Siberia. The oblast has an area of . Its population is 1,977,665 ( 2010 Census) with the majority, 1.12 ...

Russia Russia (, , ), or the Russian Federation, is a List of transcontinental countries, transcontinental country spanning Eastern Europe and North Asia, Northern Asia. It is the List of countries and dependencies by area, largest country in the ...

, a left tributary of the

Irtysh The Irtysh ( otk, 𐰼𐱅𐰾:𐰇𐰏𐰕𐰏, Ertis ügüzüg, mn, Эрчис мөрөн, ''Erchis mörön'', "erchleh", "twirl"; russian: Иртыш; kk, Ертіс, Ertis, ; Chinese: 额尔齐斯河, pinyin: ''É'ěrqísī hé'', Xiao'erj ...

.Article
in the

Great Soviet Encyclopedia The ''Great Soviet Encyclopedia'' (GSE; ) 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 ''Bolshaya rossiyskaya e ...

It is long, and has a drainage basin of . The river flows across lake

Tenis Tenis (russian: Тенис), is a lake in the southern part of the West Siberian Plain, Omsk Oblast, south-central Russia. The lake is an Important Bird Area, especially for the Dalmatian pelican, and is part of a protected area. The name is pr ...

.Water of Russia - Тенис
(in Russian)

References

{{reflist Rivers of Omsk Oblast