The Ostyor (), or Ascior
[ official transliteration] () is a river in
Pochinkovsky,
Roslavlsky, and
Shumyachsky Districts of
Smolensk Oblast
Smolensk Oblast (), informally also called Smolenshchina (), is a federal subjects of Russia, federal subject of Russia (an oblast). Its administrative centre is the types of inhabited localities in Russia, city of Smolensk. As of the 2021 Russ ...
in
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 ...
and in
Klimavichy and
Krychaw Districts of
Mogilev Region of
Belarus
Belarus, officially the Republic of Belarus, is a landlocked country in Eastern Europe. It is bordered by Russia to the east and northeast, Ukraine to the south, Poland to the west, and Lithuania and Latvia to the northwest. Belarus spans an a ...
. It is a left
tributary
A tributary, or an ''affluent'', is a stream or river that flows into a larger stream (''main stem'' or ''"parent"''), river, or a lake. A tributary does not flow directly into a sea or ocean. Tributaries, and the main stem river into which they ...
of the
Sozh. The Ostyor is long, and has a basin.
The town of
Roslavl
Roslavl (, ) is a town and the administrative center of Roslavlsky District in Smolensk Oblast, Russia. It is a road and rail junction and a market town. Population:
History
Roslavl was founded as Rostislavl in the 1130s or 1140s. The name is ...
is located on the left bank of the Ostyor. The lower course of the Ostyor marks the state border between Russia and Belarus.
The source of the Ostyor is in the east of Pochinkovsky District, in the
Smolensk Upland. The river flows south, accepts the
Ostrik from the right, turns west and passes Roslavl. There, the Ostyor turns northwest. At the border of the district, it turns west, a stretch of the Ostyor makes the border between Roslavlsky and Pochinskovsky Districts. Downstream, it turns south and makes the border between Roslavlsky and Shumyachsky Districts. Close to the village of
Samolyubovo it departs from the border, turns west, flows north of the urban-type settlement of
Shumyachi, turns southwest and accepts the
Nemka from the right. It crosses Shumyachsky District, and at the state border between Russia and Belarus turns west and follows the border. The mouth of the Ostyor is close to the village of
Kholmy.
The
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 Ostyor includes the southern part of Pochinkovsky District, the western part of Roslavlsky District, the central part of Shumyachsky District, minor areas in the east of
Khislavichsky District
Khislavichsky District () is an administrativeResolution #261 and municipalLaw #110-z district (raion), one of the administrative divisions of Smolensk Oblast, twenty-five in Smolensk Oblast, Russia. It is located in the southwest of the oblast and ...
, as well as parts of Klimavichy and Krychaw Districts.
References
External links
{{Commons category-inline, Ostyor River (Sozh)
Rivers of Smolensk Oblast
Rivers of Mogilev region
Rivers of Belarus