River IJssel, sometimes called Gelderse IJssel ("Gelderland IJssel") to avoid confusion with its Hollandse IJssel namesake in the west of the Netherlands, is a branch of the Rhine in the Dutch provinces of Gelderland and Overijssel. River IJssel flows from Westervoort, east of the city of Arnhem, until it discharges into the IJsselmeer ("Lake IJssel", until the 1932 completion of the Afsluitdijk known as the Zuiderzee, a North Sea inlet). River IJssel is one of the three major distributary branches into which the Rhine divides itself shortly after crossing the German-Dutch border, the other two being the rivers Nederrijn and Waal.