Opir (river)

Opir
The Opir River near Hrebeniv, 2008
Native name	О́пір (Ukrainian)
Location
Country	Ukraine
Oblast	Lviv Oblast
Physical characteristics
Source
• location	near Oporets [uk][2]
• coordinates	48°47′49.6″N 23°17′14.3″E
• elevation	975 m (3,199 ft)
Mouth	Stryi
• location	near Verkhnie Synovydne[3]
• coordinates	49°06′45.0″N 23°35′40.9″E
• elevation	370 m (1,210 ft)
Length	58 km (36 mi)[1]
Basin size	843 km^2 (325 sq mi)[1]
Basin features
Progression	Stryi→ Dniester→ Dniester Estuary→ Black Sea
Tributaries
• left	Oriava [uk] Holovchanka [uk]
• right	Slavka [uk] Rozhanka [uk]

The Opir River (Ukrainian: О́пір) is located in Ukraine, within Stryi Raion of Lviv Oblast. It is a right tributary of the river Stryi (Dniester basin).

Geography

The Opir River originates on the eastern slope of Velykyi Yavirnyk Mountain (Ukrainian: Великий Явірник) in the Verkhovinsky range [uk], south of the village of Oporets [uk].^[2] It runs between the mountains of the Skole Beskids, mainly to the northeast and north. It flows into the Stryi River between the town of Verkhnie Synovydne and the village of Mezhybrody.

The Opir is 58 kilometres (36 mi) long, with a basin size of 843 km² (325 sq mi).^[1] Its average stream gradient is 10.4 m/km (55 ft/mi).^[1] The river flows in a V-shaped valley, with a width varying between 150 m (490 ft) and 300 m (980 ft) in the lower reaches.^[1] The floodplain is bilateral, sometimes unilateral, with a width ranging from 30 metres (98 ft) to 425 metres (1,394 ft). The shores are steep and occasionally swampy. The stream bed is rocky, with a width of 10 metres (33 ft) to 80 metres (260 ft), and a depth of 0.2 metres (7.9 in) to 1.2 metres (3 ft 11 in). The bottom is usually lined with pebbles of Carpathian sandstones. The river supplies water for settlements and for the irrigation of agricultural lands.

Recently, the river has become popular among tourists who go rafting.^[4]

Tributaries

Eight small rivers and 31 streams with a total length of 94.3 kilometres (58.6 mi) and an area of 21.9 hectares (54 acres) flow into the river.

• Right: Kamianka [uk], Chudyliv [uk], Pavliv [uk], Hrebenovets [uk], Zelemyanka [uk], Tsihla [uk], Rozhanka [uk], Slavka [uk], Khokhlinsky [uk], Pysarivka [uk], Oporets [uk].

• Left: Zakuty [uk], Lavochanka [uk], Dubrivka [uk], Oriava [uk], Yakhystiv [uk], Holovchanka [uk], Rovina [uk].

Settlements

Several settlements are located on the river (in order from the source to the mouth): Oporets [uk], Lavochne, Ternavka, Slavske, Tukhlia, Hrebeniv, Skole, Dubyna, Verkhnie Synovydne.

Gallery

• 
  Opir river valley (view from the Zelemyanka ridge [uk]).
• 
  Railway bridge on the Opir.
• 
  Opir in winter.

References

1. Anna Hryhorivna Lutsyk, Pavlo Volodymyrovych Bosak (2019). "Антропогенне забруднення річок смт. Славське" [Anthropogenic pollution of rivers in the town of Slavske] (PDF). Проблеми та перспективи розвитку системи безпеки життєдіяльності (in Ukrainian): 163–165.
2. Prykhodko, M. M.; Romaniuk, V. V.; Kukhtar, D. V.; Bodnaruk, I. L.; Adamovych, M. V. (2020). "Use of geoinformation technology to study the structure and morphometric parameters of river basins". Geoinformatics: Theoretical and Applied Aspects 2020: 1–5. doi:10.3997/2214-4609.2020geo014.
3. Saul Bernard Cohen, Saul Cohen (2008). "Verkhnye Syn'ovydne". The Columbia Gazetteer of the World: A to G. p. 4092. ISBN 9780231145541.
4. N.Ye. Pankiv, O.R. Roik (2019). "Greenways as a model for the development of sustainable tourism in the Lviv region". Journal of Geology, Geography and Geoecology. 28 (1). doi:10.15421/111917. ISSN 2617-2909.

External links