The Ostyor (russian: Остёр), or Ascior
[ official transliteration] ( be, Асцёр) is a river in
Pochinkovsky,
Roslavlsky, and
Shumyachsky Districts of
Smolensk Oblast in
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 ...
and in
Klimavichy and
Krychaw District
, translit_lang1 = Belarusian
, translit_lang1_type =
, translit_lang1_info =
, translit_lang1_type1 = Łacinka
, translit_lang1_info1= Kryčaŭski rajon
, settlement_type = District
, image_skyline ...
s of
Mogilev Region
Mogilev Region or Mogilev Oblast or Mahiliow Voblasts ( be, link=no, Магілёўская вобласць; ''Mahiloŭskaja voblasć''; russian: link=no, Могилёвская область; ''Mogilyovskaya Oblast''), is a region (''oblast'' ...
of
Belarus
Belarus,, , ; alternatively and formerly known as Byelorussia (from Russian ). officially the Republic of Belarus,; rus, Республика Беларусь, Respublika Belarus. is a landlocked country in Eastern Europe. It is bordered by R ...
. It is a left
tributary
A tributary, or affluent, is a stream or river that flows into a larger stream or 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 drain the surrounding drainage ...
of the
Sozh. It is long, and the area of its basin .
The town of
Roslavl is located on the left bank of the Ostyor. The lower course of the Ostyor makes the state border between Russia and Belarus.
The source of the Ostyor is in the east of Pochinkovsky District, in the
Smolensk Upland
The Smolensk Upland (russian: italic=yes, Смоленская возвышенность) is the Western part of the Smolensk–Moscow Upland at the East European Plain, which is located mainly in Smolensk Oblast of Russia, with small parts lying ...
. 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 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 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, 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