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.Porumbac / Porumbacul / Raul Mare al Porumbacului (jud. Sibiu), e-calauza.ro The Porumbacu originates on the northern slope of Negoiu Peak, Făgăraș Mountains. Its length is and its basin size is .
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