Boljunčica is a river in inland Istria, Croatia, a left tributary of Raša. It is 33 kilometres (21 mi) long and it has a basin with an area of 230 square kilometres (89 sq mi). Its average discharge at the measurement station in Polje Čepić (covering 183 km2 of the basin) is 0.956 m3/s, and it can go completely dry.[1]
Boljunčica rises on the western slopes of the Učka mountain and flows to the south. Near Polje Čepić and Podpićan, it turns to the west and flows into the Raša.
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