The Süderelbe () (Southern Elbe) is the biggest

anabranch An anabranch is a section of a river or stream that diverts from the main channel or stem of the watercourse and rejoins the main stem downstream. Local anabranches can be the result of small islands in the watercourse. In larger anabranches, ...

of the

Unterelbe The Unterelbe or, in English usually the Lower Elbe, refers to the lower reaches of the river Elbe in Germany influenced by the tides. It starts at kilometre 586, at the sluice of Geesthacht, where the Elbe forms the border between Lower Sa ...

river in the area which is now the Port of Hamburg,

Germany Germany, officially the Federal Republic of Germany (FRG),, is a country in Central Europe. It is the most populous member state of the European Union. Germany lies between the Baltic and North Sea to the north and the Alps to the sou ...

. Its natural flow path was redirected through the Köhlbrand.

See also