The Yser ( , ; ) is a

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 ...

that rises in

French Flanders French Flanders ( ; ; ) is a part of the historical County of Flanders, where Flemish—a Low Franconian dialect cluster of Dutch—was (and to some extent, still is) traditionally spoken. The region lies in the modern-day northern French regi ...

(the north of

France France, officially the French Republic, is a country located primarily in Western Europe. Overseas France, Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the Atlantic Ocean#North Atlan ...

), enters the Belgian province of

West Flanders West Flanders is the westernmost province of the Flemish Region, in Belgium. It is the only coastal Belgian province, facing the North Sea to the northwest. It has land borders with the Dutch province of Zeeland to the northeast, the Flemis ...

and flows through the ''

Ganzepoot The Ganzepoot (Dutch for ''goose foot'') is a series of lock (water navigation), locks and spillways in the inner port of Nieuwpoort, Belgium which connect one river, three water channels and two canals with the mouth of the Yser River and the ma ...

'' and into 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 ...

at the town of Nieuwpoort. The source of the Yser is in

Buysscheure Buysscheure (; from Dutch, ''Buisscheure'' in modern Dutch spelling) is a commune in the Nord department in northern France. The source of the river Yser is located here. Population Heraldry See also *Communes of the Nord department Th ...

(''Buisscheure''), in the

Nord Nord, a word meaning "north" in several European languages, may refer to: Acronyms * National Organization for Rare Disorders, an American nonprofit organization * New Orleans Recreation Department, New Orleans, Louisiana, US Film and televisi ...

department of northern France. It flows through Bollezeele (''Bollezele''),

Esquelbecq Esquelbecq (; from ) is a commune in the Nord department in northern France. Its southern limit with Ledringhem is ''chemin de Rubrouck''. Population History In 1436, Wautier de Ghistelles was ''seigneur d'Ekelsbeke et de Ledringhem'' (L ...

(''Ekelsbeke''), and Bambecque (''Bambeke''). After approximately of its course, it leaves France and enters Belgium. It then flows through

Diksmuide (; ; ) is a Belgian city and municipality in the Flemish province of West Flanders. The municipality comprises the city of proper and the former communes of Beerst, Esen, Kaaskerke, Keiem, Lampernisse, Leke, Nieuwkapelle, Oostkerke ...

and out into the North Sea at Nieuwpoort. During the

Battle of the Yser The Battle of the Yser (, ) was a battle of the First World War that took place in October 1914 between the towns of Nieuwpoort, Belgium, Nieuwpoort and Diksmuide, along a stretch of the Yser River and the Yperlee Canal, in Belgium. The front ...

in the

First World War World War I or the First World War (28 July 1914 – 11 November 1918), also known as the Great War, was a World war, global conflict between two coalitions: the Allies of World War I, Allies (or Entente) and the Central Powers. Fighting to ...

, by opening the sluices, part of the

polder A polder () is a low-lying tract of land that forms an artificial hydrology, hydrological entity, enclosed by embankments known as levee, dikes. The three types of polder are: # Land reclamation, Land reclaimed from a body of water, such as a ...

west of the Yser was flooded with seawater between Nieuwpoort and Diksmuide to provide an obstacle to the advancing German Army and keep westernmost Belgium safe from German occupation. The Yser river itself never overflowed its banks.Leper, J., Kunstmatige inundaties in Maritiem Vlaanderen 1316-1945, Michiels, Tongeren, 1957 (327 p.), p.205

Basin

The basin covers 1101 km² and is two-thirds located in Belgium. A ridge in France forms the watershed line with the Aa basin in the west; in the south and east, the West Flemish Hills and the Central West Flemish Hills form the boundary with the Lys basin; in the north, a line of dunes is the boundary with the North Sea coast. The Yser rises west of Cassel in northern France and has two official sources, at Buisscheure and Lederzele. It is fed there by the Penebeek (Peene Becque), the Vuilebeek (Sale Becque) and the Herzele (Herzeele). The Zwijnebeek (Zwyne Becque) on the left bank and the Heidebeek (Ey Becque) on the right bank form the border between France and Belgium for a long time. In Belgium, the Poperinge canal, Kemmelbeek, Lovaart, Ieperlee and Handzamevaart join the river. The Yser flows into the North Sea at Nieuwpoort (B) via the Ganzepoot lock complex.

History

The area between the Yser and the coast was Veurne-Ambacht in the Middle Ages. At the end of the 16th century this came into Spanish hands and a few settlements/forts were erected along the Yser against plundering by reformers from Ostend. These largely lost their function after the fall of Ostend in 1604. After the Peace of Aachen, Veurne came into French hands and the Yser formed a northern border of the French empire. Fortifications were built again, such as Fort Knokke. After the Treaty of Utrecht, the area belonged to the Austrian Netherlands. There were still some barrier towns in the area, but the Yser eventually lost its border function. The river was part of the front line during World War I and was the scene of trench warfare, with the Belgian and German armies dug in along both sides of the river. The Belgian army was able to hold out here for the rest of the war after the Battle of the Yser in 1914 following the inundation of part of the Yser plain, at the suggestion of the Veurn investigating judge and with the cooperation of Karel Cogge and Hendrik Geeraert. Further inland, the Allied lines were manned by British and French troops. As in other places in the region, terrible scenes took place in which each other's positions were taken and recaptured again and again at a high price in human lives. Along the Yser, several monuments and sites recall the war, including the Yser Tower and the Death March in Diksmuide. In May 1940, the French and English allies blew up all the bridges and locks again.

Etymology

Like some other names in

Flanders Flanders ( or ; ) is the Dutch language, Dutch-speaking northern portion of Belgium and one of the communities, regions and language areas of Belgium. However, there are several overlapping definitions, including ones related to culture, la ...

, the name IJzer is of

Celtic Celtic, Celtics or Keltic may refer to: Language and ethnicity *pertaining to Celts, a collection of Indo-European peoples in Europe and Anatolia **Celts (modern) *Celtic languages **Proto-Celtic language *Celtic music *Celtic nations Sports Foot ...

origin, as the

Menapii The Menapii were a Belgic tribe dwelling near the North Sea, around present-day Cassel, during the Iron Age and the Roman period. History The Menapii were persistent opponents of Julius Caesar's conquest of Gaul, resisting until 54 BC. They ...

lived in the area before the

Roman Roman or Romans most often refers to: *Rome, the capital city of Italy *Ancient Rome, Roman civilization from 8th century BC to 5th century AD *Roman people, the people of Roman civilization *Epistle to the Romans, shortened to Romans, a letter w ...

times (see also the

Isar The Isar () is a river in Austria and in Bavaria, Germany. Its source is in the Karwendel mountain range of the Alps. The Isar river enters Germany near Mittenwald and flows through Krün, Wallgau, Bad Tölz, Munich, and Landshut before reaching ...

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 ...

, the Jizera in

Bohemia Bohemia ( ; ; ) is the westernmost and largest historical region of the Czech Republic. In a narrow, geographic sense, it roughly encompasses the territories of present-day Czechia that fall within the Elbe River's drainage basin, but historic ...

and the

Isère Isère ( , ; ; , ) is a landlocked Departments of France, department in the southeastern French Regions of France, region of Auvergne-Rhône-Alpes. Named after the river Isère (river), Isère, it had a population of 1,271,166 in 2019.

) before assimilation by the

Franks file:Frankish arms.JPG, Aristocratic Frankish burial items from the Merovingian dynasty The Franks ( or ; ; ) were originally a group of Germanic peoples who lived near the Rhine river, Rhine-river military border of Germania Inferior, which wa ...

Tributaries

The main tributaries of the Yser are:, see tab "Affluents" *

Peene Becque The Peene Becque (West Flemish: Penebeke) is a small river in the Nord (French department), Nord department in France. It is long. The word ''Peene'' may be related to the modern Dutch word ''Peen'' that refers to the wild carrot plant (''Daucus ...

(''Penebeek'') * Sale Becque (''Vuilebeek'') * Ey Becque (''Heidebeek'') * Zwyne Becque (''Zwijnebeek'') * Vleeterbeek

References

External links

Image of the basin of the Yser
Rivers of Belgium Rivers of France International rivers of Europe Rivers of Nord (French department) Rivers of Hauts-de-France Rivers of West Flanders 0Yser Nieuwpoort, Belgium {{France-river-stub