Erfde (Danish: Ervde) is a municipality in the district of Schleswig-Flensburg, in Schleswig-Holstein, Germany.
river eider
The Eider (German: Die Eider; Danish: Ejderen; Latin: Egdor or Egdore) is the longest river of the German state of Schleswig-Holstein. The river starts nearBordesholm and reaches the southwestern outskirts of Kiel on the shores of the Baltic Sea, but flows to the west, ending in the North Sea. The middle part of the Eider was appropriated for use as part of the Kiel Canal.
The Kiel Canal
The Kiel Canal is a 98-kilometre (61 mi) long freshwater canal in the German state of Schleswig-Holstein. The canal was finished in 1914 and links the North Sea at Brunsbüttel to the Baltic Sea at Kiel-Holtenau. An average of 250 nautical miles (460 km) is saved by using the Kiel Canal instead of going around the Jutland Peninsula. This not only saves time but also avoids potentially dangerous storm-prone seas.
Besides its two sea entrances, the Kiel Canal is linked, at Oldenbüttel, to the navigable River Eider by the short Gieselau Canal. ( homepage : http://www.kiel-canal.org/english.htm )
site :
http://www.kropp.de/de/erfde.html