Yser

Not to be confused withIsère (river).

Yser
The Yser and West FlemishpoldersnearDiksmuide
Native name	Yser(Picard) IJzer(Dutch)
Location
Countries	BelgiumandFrance
Physical characteristics
Source
• location	Nord
• elevation	30 m (98 ft)
Mouth
• location	North Sea
• coordinates	51°9′10″N2°43′23″E
Length	78 km (48 mi)
Basin size	1,101 km2(425 sq mi)
Discharge
• average	3 m3/s (110 cu ft/s)

TheYser(US:/iːˈzɛər/ee-ZAIR,French:[izɛʁ];Dutch:IJzer[ˈɛizər]) is ariverthat rises inFrench Flanders(the north ofFrance), enters theBelgianprovince ofWest Flandersand flows through theGanzepootand into theNorth Seaat the town ofNieuwpoort.

The source of the Yser is inBuysscheure(Buisscheure), in theNorddepartment of northern France. It flows throughBollezeele(Bollezele),Esquelbecq(Ekelsbeke), andBambecque(Bambeke). After approximately 30 kilometres (19 mi) of its 78-kilometre (48 mi) course, it leaves France and enters Belgium. It then flows throughDiksmuideand out into the North Sea at Nieuwpoort.

During theBattle of the Yserin theFirst World War,by opening the sluices, part of thepolderwest 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.

Basin

The basin covers 1101 km²and 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 ofCasselin 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 inFlanders,the name IJzer is ofCelticorigin, as theCelticMenapiilived in the area before theRomantimes (see also theIsarinGermany,theJizerainBohemiaand theIsèreinFrance) before assimilation by theFranks.

Tributaries

The main tributaries of the Yser are:

• Peene Becque(Penebeek)
• Sale Becque (Vuilebeek)
• Ey Becque (Heidebeek)
• Zwyne Becque (Zwijnebeek)
• Vleeterbeek

External links

• Image of the basin of the Yser