The Eider ( ; ;
Latin
Latin ( or ) is a classical language belonging to the Italic languages, Italic branch of the Indo-European languages. Latin was originally spoken by the Latins (Italic tribe), Latins in Latium (now known as Lazio), the lower Tiber area aroun ...
: ''Egdor'' or ''Eidora'') is the longest river in the
German state of
Schleswig-Holstein
Schleswig-Holstein (; ; ; ; ; occasionally in English ''Sleswick-Holsatia'') is the Northern Germany, northernmost of the 16 states of Germany, comprising most of the historical Duchy of Holstein and the southern part of the former Duchy of S ...
. The river starts near
Bordesholm and reaches the southwestern outskirts of
Kiel
Kiel ( ; ) is the capital and most populous city in the northern Germany, German state of Schleswig-Holstein. With a population of around 250,000, it is Germany's largest city on the Baltic Sea. It is located on the Kieler Förde inlet of the Ba ...
on the shores of the
Baltic Sea
The Baltic Sea is an arm of the Atlantic Ocean that is enclosed by the countries of Denmark, Estonia, Finland, Germany, Latvia, Lithuania, Poland, Russia, Sweden, and the North European Plain, North and Central European Plain regions. It is the ...
, but flows to the west, ending in the
North Sea
The North Sea lies between Great Britain, Denmark, Norway, Germany, the Netherlands, Belgium, and France. A sea on the European continental shelf, it connects to the Atlantic Ocean through the English Channel in the south and the Norwegian Se ...
. The lower part of the Eider was used as part of the
Eider Canal until that canal was replaced by the modern
Kiel Canal
The Kiel Canal (, until 1948 called in German the ) is a fresh water canal that links the North Sea () to the Baltic Sea (). It runs through the Germany, German states of Germany, state of Schleswig-Holstein, from Brunsbüttel to the Holtenau di ...
.
In the
Early Middle Ages
The Early Middle Ages (or early medieval period), sometimes controversially referred to as the Dark Ages (historiography), Dark Ages, is typically regarded by historians as lasting from the late 5th to the 10th century. They marked the start o ...
the river is believed to have been the border between the related Germanic tribes, the
Jutes
The Jutes ( ) were one of the Germanic people, Germanic tribes who settled in Great Britain after the end of Roman rule in Britain, departure of the Roman Britain, Romans. According to Bede, they were one of the three most powerful Germanic na ...
and the
Angles, who along with the neighboring
Saxons
The Saxons, sometimes called the Old Saxons or Continental Saxons, were a Germanic people of early medieval "Old" Saxony () which became a Carolingian " stem duchy" in 804, in what is now northern Germany. Many of their neighbours were, like th ...
crossed the North Sea from this region during this period and settled in England. During the
High Middle Ages
The High Middle Ages, or High Medieval Period, was the periodization, period of European history between and ; it was preceded by the Early Middle Ages and followed by the Late Middle Ages, which ended according to historiographical convention ...
the Eider was the border between the
Saxons
The Saxons, sometimes called the Old Saxons or Continental Saxons, were a Germanic people of early medieval "Old" Saxony () which became a Carolingian " stem duchy" in 804, in what is now northern Germany. Many of their neighbours were, like th ...
and the
Danes
Danes (, ), or Danish people, are an ethnic group and nationality native to Denmark and a modern nation identified with the country of Denmark. This connection may be ancestral, legal, historical, or cultural.
History
Early history
Denmark ...
, as reported by
Adam of Bremen in 1076. For centuries it divided
Denmark
Denmark is a Nordic countries, Nordic country in Northern Europe. It is the metropole and most populous constituent of the Kingdom of Denmark,, . also known as the Danish Realm, a constitutionally unitary state that includes the Autonomous a ...
and the
Holy Roman Empire
The Holy Roman Empire, also known as the Holy Roman Empire of the German Nation after 1512, was a polity in Central and Western Europe, usually headed by the Holy Roman Emperor. It developed in the Early Middle Ages, and lasted for a millennium ...
.
Today it is the border between
Schleswig,
Holstein and
Eiderland, the northern and southern parts, respectively, of the modern German state of Schleswig-Holstein.
The Eider flows through the following towns: Bordesholm, Kiel,
Rendsburg
Rendsburg (, also ''Rensborg'', , also ''Rensborg'') is a town on the Eider (river), River Eider and the Kiel Canal in the central part of Schleswig-Holstein, Germany. It is the capital of the ''Kreis'' (district) of Rendsburg-Eckernfoerde, Rends ...
,
Friedrichstadt and
Tönning. Near Tönning it flows into the North Sea. The
estuary
An estuary is a partially enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea. Estuaries form a transition zone between river environments and maritime enviro ...
has
tidal flats and
brackish water
Brackish water, sometimes termed brack water, is water occurring in a natural environment that has more salinity than freshwater, but not as much as seawater. It may result from mixing seawater (salt water) and fresh water together, as in estuary ...
. The mouth of the river is crossed by a closeable
storm surge barrier, the
Eider Barrage.
Navigation
A tidal
lock
Lock(s) or Locked may refer to:
Common meanings
*Lock and key, a mechanical device used to secure items of importance
*Lock (water navigation), a device for boats to transit between different levels of water, as in a canal
Arts and entertainme ...
provides access for boats through the
Eider Barrage. The fishing port of
Tönning lies upstream of the barrier, while
Friedrichstadt is further upstream. At Friedrichstadt a lock gives access to the
River Treene.
The Eider remains tidal as far as the lock at
Nordfeld, above Friedrichstadt. There is a further lock named near
Wrohm, upstream of Nordfeld. A further beyond Lexfähre is the junction with the short
Gieselau Canal, which provides a navigable link to the
Kiel Canal
The Kiel Canal (, until 1948 called in German the ) is a fresh water canal that links the North Sea () to the Baltic Sea (). It runs through the Germany, German states of Germany, state of Schleswig-Holstein, from Brunsbüttel to the Holtenau di ...
at
Oldenbüttel. The Eider therefore provides an alternative route from the
North Sea
The North Sea lies between Great Britain, Denmark, Norway, Germany, the Netherlands, Belgium, and France. A sea on the European continental shelf, it connects to the Atlantic Ocean through the English Channel in the south and the Norwegian Se ...
to the Kiel Canal, avoiding the tides of the estuary of the
Elbe
The Elbe ( ; ; or ''Elv''; Upper Sorbian, Upper and , ) is one of the major rivers of Central Europe. It rises in the Giant Mountains of the northern Czech Republic before traversing much of Bohemia (western half of the Czech Republic), then Ge ...
.
[
The head of navigation lies a further upstream at ]Rendsburg
Rendsburg (, also ''Rensborg'', , also ''Rensborg'') is a town on the Eider (river), River Eider and the Kiel Canal in the central part of Schleswig-Holstein, Germany. It is the capital of the ''Kreis'' (district) of Rendsburg-Eckernfoerde, Rends ...
. Although it is adjacent to the Kiel Canal, through passage is no longer possible.[
]
See also
* Eider-Treene Depression
* List of rivers of Schleswig-Holstein
References
{{Authority control
Rivers of Schleswig-Holstein
Holstein
Federal waterways in Germany
Kiel Canal
Rivers of Germany