- Source: Porumbacu (river)
The Porumbacu (in its upper course also: Valea Sărății and Valea Mare) is a left tributary of the river Olt in Romania. It discharges into the Olt in Porumbacu de Jos. The Porumbacu originates on the northern slope of Negoiu Peak, Făgăraș Mountains. Its length is 27 km (17 mi) and its basin size is 80 km2 (31 sq mi).