Opir (river)

The Opir River (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 (Великий Явірник) in the Verkhovinsky range, south of the village of Oporets. 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 km long, with a basin size of 843 km2. Its average stream gradient is 10.4 m/km. The river flows in a V-shaped valley, with a width varying between 150 m and 300 m in the lower reaches. The floodplain is bilateral, sometimes unilateral, with a width ranging from 30 m to 425 m. The shores are steep and occasionally swampy. The stream bed is rocky, with a width of 10 m to 80 m, and a depth of 0.2 m to 1.2 m. 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.

Tributaries
Eight small rivers and 31 streams with a total length of 94.3 km and an area of 21.9 ha flow into the river.


 * Right: Kamianka (Opir), Chudyliv, Pavliv (river), Hrebenovets, Zelemyanka, Tsihla, Rozhanka (river), Slavka (river), Khokhlinsky, Pysarivka (river), Oporets (river).


 * Left: Zakuty, Lavochanka, Dubrivka (river), Oriava (river), Yakhystiv, Holovchanka, Rovina (river).

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