The Beliu () is a left tributary of the river Crișul Negru in Romania. Formerly a right tributary of the Teuz, its flow is now diverted by a canal towards the Crișul Negru near Tăut, built in 1914–1919.Planul de management al riscului la inundații - Administrația Bazinală de Apă Crișuri, p. 16Local geography of Șomoșcheș Its length is and its basin size is .
Tributaries
The following rivers are tributaries to the Beliu (from source to mouth):
Left: Hășmaș Right: Urviș, Botfei, Mideș, Mocirla, Sartiș, Renișel, Barcău, Frunziș
References