The Obsha () 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 ...

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 ...

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 ...

and Oleninsky, Belsky, and

Zharkovsky District Zharkovsky District (russian: Жарко́вский райо́н) is an administrative and municipalLaw #4-ZO district (raion), one of the thirty-six in Tver Oblast, Russia. It is located in the southwest of the oblast and borders with Nelidov ...

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 ...

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 ...

. 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 drai ...

of the Mezha (

Western Dvina , be, Заходняя Дзвіна (), liv, Vēna, et, Väina, german: Düna , image = Fluss-lv-Düna.png , image_caption = The drainage basin of the Daugava , source1_location = Valdai Hills, Russia , mouth_location = Gulf of Riga, Baltic Se ...

basin). It is long, and the area of its basin . The town of Bely is located on the banks of the Obsha. The source of the Obsha is in the northwestern part of Sychyovsky District. The river flows north, turns west and crosses into Tver Oblast. A stretch of it makes the border between Smolensk and Tver Oblasts. It crosses the southern part of Oleninsky District, a short stretch of the Obsha makes a border between Oleninsky and Belsky Districts, and downstream of the village of Antipino it departs from the border and flows southwest, through the town of Bely. In Bely, it turns northwest and crosses into Zharkovsky District. The mouth of the Obsha is located by the village of Ustye. The

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, ...

of the Obsha includes almost the whole area of Belsky District, as well as minor areas in the west of Sychyovsky District, in the south of Oleninsky District, in the northeast of Zharkovsky District, and in the north of

Kholm-Zhirkovsky District Kholm-Zhirkovsky District (russian: Холм-Жирковский райо́н) is an administrativeResolution #261 and municipalLaw #137-z district (raion), one of the administrative divisions of Smolensk Oblast, twenty-five in Smolensk Oblast, Ru ...

of Smolensk Oblast.

References

{{reflist Rivers of Smolensk Oblast Rivers of Tver Oblast