Tyosha is a river

River

A river is a natural watercourse, usually freshwater, flowing towards an ocean, a lake, a sea, or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water. Small rivers may also be called by several other names, including...

 in Nizhny Novgorod Oblast

Nizhny Novgorod Oblast

Nizhny Novgorod Oblast is a federal subject of Russia . Its administrative center is the city of Nizhny Novgorod. Population: The oblast is crossed by the Volga River. Apart from Nizhny Novgorod's metropolitan area, the biggest city is Arzamas...

 in Russia

Russia

Russia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...

, a right tributary of the Oka River

Oka River

Oka is a river in central Russia, the largest right tributary of the Volga. It flows through the regions of Oryol, Tula, Kaluga, Moscow, Ryazan, Vladimir, and Nizhny Novgorod and is navigable over a large part of its total length, as far upstream as to the town of Kaluga. Its length exceeds...

. The length of the river is 311 km. The area of its basin

Drainage basin

A drainage basin is an extent or an area of land where surface water from rain and melting snow or ice converges to a single point, usually the exit of the basin, where the waters join another waterbody, such as a river, lake, reservoir, estuary, wetland, sea, or ocean...

 is 7,800 km². The Tyosha freezes up in November - first half of December and stays icebound until the second half of March - first half of April. Its biggest tributary is the Seryozha River. The city of Arzamas

Arzamas

Arzamas is a city in Nizhny Novgorod Oblast, Russia, located on the Tyosha River , east of Moscow. Population: -History:Arzamas was founded in 1578 by Ivan the Terrible in the lands populated at the time by the Mordvin people...

is located on the Tyosha River.