Nervión

Nervión
Basque: Nerbioi
River Nervion with Zubizuri footbridge.
Location
CountrySpain
RegionBasque Country
DistrictÁlava, Biscay
CityBilbao
Physical characteristics
SourceDelika Canyon
  locationSierra Salbada, Álava, Spain
  elevation1,000 m (3,300 ft)
MouthEstuary of Bilbao
  location
Bay of Biscay between Portugalete and Getxo, Spain
  elevation
0 m (0 ft)
Length72 km (45 mi)
Basin size1,900 km2 (730 sq mi)
Discharge 
  locationPortugalete and Getxo
  average9.6 m3/s (340 cu ft/s)
Basin features
Tributaries 
  leftKadagua, Galindo
  rightAltube, Ibaizabal, Asua

Nervión (Spanish pronunciation: [neɾˈβjon]; Basque: Nerbioi) is a river that runs through the town of Bilbao, Spain into the Cantabrian Sea (Bay of Biscay). Its lowermost course, downstream of its confluence with the Ibaizabal River, is known as the Estuary of Bilbao.