Órbigo

The Órbigo River is a river in the provinces of León and Zamora, Spain. It begins at the convergence of the Luna River and the Omaña River in the town of Secarejo, in the Cimanes del Tejar municipality. Decades ago, that confluence was some km. before, in the town of Santiago del Molinillo. It flows from north to south through the province of León and ultimately flows into the Esla River below Benavente.

Órbigo Latin: Urbicus
The union of the rivers Luna and Omaña at this point form the Órbigo river
Location
Country	Spain
Physical characteristics
Source	Union of the rivers Luna and Omaña
• location	Secarejo, Cimanes del Tejar, Ribera del Órbigo, León, Castile and León, Spain
• elevation	902 m (2,959 ft)
Mouth	Esla river
• location	Santa Colomba de las Monjas, Benavente y Valles, Zamora, Castile and León, Spain
• elevation	702 m (2,303 ft)
Length	162 km (101 mi)
Basin size	4,995 km2 (1,929 sq mi)
Discharge
• location	mouth
• average	38.81 m3/s (1,371 cu ft/s)
Basin features
Tributaries
• right	Duerna, Tuerto, Jamuz and Eria

How the river came to have this name is not known. According to the linguist E. Bascuas, the toponym Órbigo, would come from a Paleo-European hydronymic theme *urw-, derived from the Indo-European root *er- 'flow, move', with a hydronymic meaning. The first mention is from Hydatius "Ad fluvium nomine Urbicum".[1] There exists a theory that the river now called the Luna should be the real start of the Órbigo. Although it was the same river, in the times of the Conde Luna, it was ordered to change that name of the river so that the part in the county would have its name.