High Quality Content by WIKIPEDIA articles! The Zuiderzee (English pronunciation: / za d r ze /- Dutch: Zuiderzee, Dutch: old spelling Zuyderzee) was a shallow bay of the North Sea in the northwest of the Netherlands, extending about 100 km (60MoreHigh Quality Content by WIKIPEDIA articles! The Zuiderzee (English pronunciation: / za d r ze /- Dutch: Zuiderzee, Dutch: old spelling Zuyderzee) was a shallow bay of the North Sea in the northwest of the Netherlands, extending about 100 km (60 miles) inland and at most 50 km (30 miles) wide, with an overall depth of about 4 to 5 metres (13-16 feet) and a coastline of about 300 km (200 miles).
It covered 5,000 km2 (1,900 sq mi). Its name means southern sea in Dutch, indicating that the origin of the name can be found in Friesland to the north of the Zuiderzee (also see North Sea). In the 20th century the majority of the Zuiderzee was closed off from the North Sea (leaving the mouth of the inlet to become part of the Wadden Sea) and the salt water inlet changed into a fresh water lake called the IJsselmeer (IJssel Lake) after the river that drains into it.
The river IJssel is an estuary branch of the river Rhine (Dutch: Rijn).