The Ems ( ; ) is a river in northwestern
Germany
Germany, officially the Federal Republic of Germany, is a country in Central Europe. It lies between the Baltic Sea and the North Sea to the north and the Alps to the south. Its sixteen States of Germany, constituent states have a total popu ...
. It runs through the
states of
North Rhine-Westphalia and
Lower Saxony, and discharges into the
Dollart Bay which is part of the
Wadden Sea. Its total length is .
The state
border
Borders are generally defined as geography, geographical boundaries, imposed either by features such as oceans and terrain, or by polity, political entities such as governments, sovereign states, federated states, and other administrative divisio ...
between the Lower Saxon area of
East Friesland (Germany) and the
province of
Groningen
Groningen ( , ; ; or ) is the capital city and main municipality of Groningen (province), Groningen province in the Netherlands. Dubbed the "capital of the north", Groningen is the largest place as well as the economic and cultural centre of ...
(Netherlands), whose exact course was the subject of a border dispute between Germany and the Netherlands (settled in 2014), runs through the Ems
estuary.
Course
The source of the river is in the southern
Teutoburg Forest in North Rhine-Westphalia. In Lower Saxony, the brook becomes a comparatively large river. Here the swampy region of
Emsland is named after the river. In
Meppen the Ems is joined by its largest tributary, the
Hase River. It then flows northwards, close to the
Dutch border, into
East Frisia. Near
Emden, it flows into the Dollard bay (a
national park) and then continues as a
tidal river
A river is a natural stream of fresh water that flows on land or inside Subterranean river, caves towards another body of water at a lower elevation, such as an ocean, lake, or another river. A river may run dry before reaching the end of ...
towards the Dutch city of
Delfzijl.
Between Emden and Delfzijl, the Ems forms the border between the Netherlands and Germany and was subject to a mild dispute: the Dutch believed that the border runs through the geographical centre of the estuary, whereas the Germans claimed it runs through the deepest
channel (which is close to the Dutch
coast). As the parties are now friendly states with an open border, the argument went no further than an agreement to disagree. The issue was settled amicably in October 2014.
It became an active issue in late July 1914, when the Imperial German government began plans to mine the whole of the estuary that they claimed, in preparation for the launching of the Great War. The Dutch envoy in Berlin, Wilem Alexander Frederik Baron Gevers, tactfully announced the boundary was uncertain, and that the dispute was "opgeschort", which could mean either "suspended" or "resolved", depending on the context. The Dutch government endorsed the ambiguous declaration, thus relieving itself of an obligation to declare war on Germany for violating its neutrality. After the war, the dispute was resumed.
Past Delfzijl, the Ems discharges into the Wadden Sea, part of the
North Sea. The two
straits that separate the German
island
An island or isle is a piece of land, distinct from a continent, completely surrounded by water. There are continental islands, which were formed by being split from a continent by plate tectonics, and oceanic islands, which have never been ...
of
Borkum from its neighbours
Rottumeroog (Netherlands) and
Memmert (Germany) continue the name "Ems", as they are called ''Westere(e)ms'' and ''Osterems'' (West and East Ems).
Tourism

The Ems is accompanied and crossed by different long-distance bicycle routes:
* EmsAuenWeg
*
Emsland Route
*
Hase Ems Weg
Cities and municipalities
*
Schloß Holte-Stukenbrock
*
Hövelhof
*
Steinhorst
*
Westerwiehe
*
Schöning
*
Rietberg
*
Rheda-Wiedenbrück
*
Harsewinkel
*
Warendorf
*
Telgte
*
Greven
*
Emsdetten
*
Rheine
*
Salzbergen
*
Emsbüren
*
Lingen
*
Geeste
*
Meppen
*
Haren
*
Lathen
*
Kluse
*
Dörpen
*
Lehe
*
Aschendorf
*
Tunxdorf
*
Papenburg
*
Weener
*
Leer
*
Jemgum
*
Midlum
*
Critzum
*
Rorichum
*
Gandersum
*
Emden
*
Knock
*
Delfzijl
Tributaries
*
Wapelbach
*
Dalke
*
Lutter
*
Axtbach
*
Hessel
*
Bever
*
Werse
*
Eltingmühlenbach
*
Große Aa
*
Hase
*
Nordradde
*
Leda
History
The Ems was known to several ancient authors:
Pliny the Elder in ''Natural History'' (4.14),
Tacitus in the ''Annals'' (Book 1),
Pomponius Mela (3.3),
Strabo and
Ptolemy
Claudius Ptolemy (; , ; ; – 160s/170s AD) was a Greco-Roman mathematician, astronomer, astrologer, geographer, and music theorist who wrote about a dozen scientific treatises, three of which were important to later Byzantine science, Byzant ...
, ''Geography'' (2.10). Ptolemy's name for it was the Amisios potamos, and in
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 ...
Amisius fluvius. The others used the same, or Amisia, or Amasia or Amasios. The identification is certain, as it always is listed between the
Rhine
The Rhine ( ) is one of the List of rivers of Europe, major rivers in Europe. The river begins in the Swiss canton of Graubünden in the southeastern Swiss Alps. It forms part of the Swiss-Liechtenstein border, then part of the Austria–Swit ...
and the
Weser, and was the only river leading to the
Teutoburg Forest.
The Amisius flowed from the Teutoburg Forest, home of the
Cherusci, with the
Bructeri and others bordering the river. These tribes were among the initial
Franks. The Romans were quite interested in adding them to the empire, and to that end built a fort, Amisia, at the mouth of the Ems. As the river was navigable to their ships, they hoped to use it to access the tribes at its upper end.
Surrounding the river for most of its length, however, were swamps, bogs and marshes. The Romans found they had no place to stand, could not pick the most favourable ground, because there was none, and could not in general follow the strategies and tactics developed by the
Roman army
The Roman army () served ancient Rome and the Roman people, enduring through the Roman Kingdom (753–509 BC), the Roman Republic (509–27 BC), and the Roman Empire (27 BC–AD 1453), including the Western Roman Empire (collapsed Fall of the W ...
. They were stopped at the
Battle of Teutoburg Forest, 9 AD, and were checked again 6 years later. The Ems became a road leading nowhere for them, nor were they ever able to bridge the swamps satisfactorily with causeways.
The Dollart Bay near Emden did not exist until 1277, when a catastrophic storm surge flooded 43 parishes and killed an estimated 80,000 people.
Most of the land lost in that flood has been reclaimed in a series of initiatives from the 16th to the early 20th centuries. The river in 1277 curved north by Emden, covering the area of the current Emden harbor complex.
Construction of canals in more modern times connected the Ems to other waterways, opening it as a highway of industrial transportation.
River islands
*
Bingumer Sand
References
External links
www.ems.nrw.de/(in German)
The Ems with Emsbueren
{{Authority control
Rivers of Groningen (province)
Federal waterways in Germany
Germany–Netherlands border
Rivers of Lower Saxony
Rivers of North Rhine-Westphalia
Territorial disputes of Germany
Territorial disputes of the Netherlands
Rivers of the Netherlands
Rivers of Germany