Wełna (river)

The Wełna (German: Welna, also Kleine Warthe) is a river in west-central Poland, a right tributary of the Warta river, with a length of 118 kilometres and a basin area of 2,635 km2. Its source is near Gniezno. It passes through Janowiec Wielkopolski, Wągrowiec and Rogoźno, and flows into the Warta near Oborniki.