The River IJssel (Dutch pronunciation: [ˈɛi̯səl]), sometimes called Gelderse IJssel ("Gueldern IJssel") to avoid confusion with the Hollandse IJssel, is the branch of the Rhine in the Dutch provinces of Gelderland and Overijssel. The Romans knew the river as Isala. The IJssel flows from Westervoort, east of the city of Arnhem, until it discharges into the IJsselmeer ("Lake IJssel", known prior to the 1932 completion of the Afsluitdijk as the Zuiderzee, a North Sea inlet).