Niederelbe

The Niederelbe (i.e. Lower Elbe) is a long section of the river Elbe, from western Hamburg downstream to its mouth into the North Sea near Cuxhaven. Starting at (or Elbe kilometer 634) near Finkenwerder, Hamburg, it gradually widens from to . Once passing the Hamburg state border, the Niederelbe also forms the border between the states of Lower Saxony and Schleswig-Holstein.
The Niederelbe forms part of the Elbe section named the Unterelbe (i. e. Lower ("Under") Elbe), comprising all parts of the Elbe influenced by the North Sea's tides, starting further inland at the sluice in Geesthacht (or Elbe kilometer 586).