The Wieprz (Polish: [ˈvjɛpʂ] (
Wieprz in Roztocze National Park
Wieprz River in the Vistula watershed
|Native name||Вепр (Ukrainian)|
|Length||349 km (217 mi)|
|Basin size||10,497 km2 (4,053 sq mi)|
|⁃ average||36.4 m3/s (1,290 cu ft/s)|
|Progression||Vistula→ Baltic Sea|
The river has its sources in Lake Wieprz, near Tomaszow Lubelski, and flows into the Vistula near Deblin. The Wieprz is connected to another river, the Krzna, through the 140-kilometer Wieprz-Krzna Canal, built in 1954 - 1961. Because the Wieprz with its wide valley has not been regulated, its nature is very diverse. The meandering river with its oxbow lakes is inhabited by numerous birds, European otters and Eurasian beavers.
During the Polish-Soviet War, units of the Polish 4th Army concentrated along the Wieprz, getting ready for the Battle of Warsaw. In September 1939, during the Invasion of Poland, the Battle of Tomaszow Lubelski took place by the Wieprz.