The drainage basin of the Usvyacha includes the center and the southeast of Usvyachsky District, the southwest of Kunyinsky District, the northwest of Velizhsky District of Smolensk Oblast, as well as the northwest of Vitebsk Raion.
Mississippi River | River Thames | Amazon River | Columbia River | Hudson River | Colorado River | Potomac River | river | Ohio River | Missouri River | Delaware River | Murray River | River Tyne | Madeira River | Volga River | River Nene | River Clyde | River Trent | River Severn | Amur River | River Wear | Allegheny River | Red River | Dnieper River | Yarra River | Paraná River | River Tees | Fraser River | Yangtze River | Tocantins River |