897 km
the river Duero
The main rivers in Spain are the Duero (Douro), Miño, Tajo (Tagus), Guadiana , the Guadalquivir River, and the Ebro River. These rivers are an awesome source of electric power. Hope this helps :)
Spanish
Duero and Tagus
the Seine river is 777 km long. The river seine is 776 km long.
The Mississippi River is 5969 km long.
48 Km
The Rhone River is 812 km long
2,140 km.
That would be the River Nile, (at the moment) which is 6,650 km long.
The Benue River Is 1400 Km Long
The Ebro river is 298 km long.