The Osuga () 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 w ...
in
Oleninsky,
Rzhevsky, and
Zubtsovsky District
Zubtsovsky District (russian: Зубцо́вский райо́н) is an administrative and municipalLaw #4-ZO district (raion), one of the thirty-six in Tver Oblast, Russia. It is located in the south of the oblast and borders with Staritsky Dis ...
s of
Tver Oblast
Tver Oblast (russian: Тверска́я о́бласть, ''Tverskaya oblast'', ), from 1935 to 1990 known as Kalinin Oblast (), is a federal subjects of Russia, federal subject of Russia (an oblast). Its administrative center is the types of inh ...
and in
Sychyovsky District
Sychyovsky District (russian: Сычёвский райо́н) is an administrativeResolution #261 and municipalLaw #106-z district (raion), one of the twenty-five in Smolensk Oblast, Russia. It is located in the northeast of the oblast. The area ...
of
Smolensk Oblast
Smolensk Oblast (russian: Смоле́нская о́бласть, ''Smolenskaya oblast''; informal name — ''Smolenschina'' (russian: Смоле́нщина)) is a federal subject of Russia (an oblast). Its administrative centre is the city o ...
of
Russia
Russia (, , ), or the Russian Federation, is a transcontinental country spanning Eastern Europe and Northern Asia. It is the largest country in the world, with its internationally recognised territory covering , and encompassing one-eig ...
, a
left tributary of the
Vazuza (technically, of
Vazuza Reservoir The Vazuza Reservoir (russian: Вазузское водохранилище) is a reservoir based on the lower channel of the Vazuza River, in Tver Oblast and Smolensk Oblast, Russia. It was filled in 1977–1978.
The dam is between the Pashutino ...
) in the basin of the
Volga
The Volga (; russian: Во́лга, a=Ru-Волга.ogg, p=ˈvoɫɡə) is the longest river in Europe. Situated in Russia, it flows through Central Russia to Southern Russia and into the Caspian Sea. The Volga has a length of , and a catchm ...
. The Osuga is long, and the area of its
drainage basin
A drainage basin is an area of land where 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, ...
is .
The source of the Osuga is close to the village of
Zavidovo and about southeast from
Olenino Olenino (russian: Оленино) is the name of several inhabited localities in Russia.
Urban localities
* Olenino, Tver Oblast, an urban-type settlement in Oleninsky District of Tver Oblast
Rural localities
* Olenino, Ilyinsky District, Ivanovo ...
, the district center. The river flows east. It crosses into Rzhevsky District and by the village of
Rykovo turns south and reaches the border with Smolensk Oblast. At the border, the Osuga turns east and makes a stretch of the border between Tver and Smolensk Oblasts. Downstream of the village of
Rogachyovo it turns northwest and departs from the border. This last stretch of the Osuga in Tver Oblast is currently a bay of Vazuza Reservoir.
The drainage basin of the Osuga comprises the eastern part of Oleninsky District, the southern part of Rzhevsky District, the northern part of Suchyovsky District, and a tiny area in the northwest of Zubtsovsky District.
References
{{reflist
Rivers of Tver Oblast
Rivers of Smolensk Oblast