Oude Maasje
Encyclopedia
The Oude Maasje is a former distributary of the river Maas (or Meuse
Meuse
Meuse is a department in northeast France, named after the River Meuse.-History:Meuse is one of the original 83 departments created during the French Revolution on March 4, 1790...

), which runs parallel to the current canalised Bergse Maas
Bergse Maas
The Bergse Maas is a canal that was constructed in 1904 to be a branch of the Maas River in the Dutch province of North Brabant. The Maas splits near Heusden into the Afgedamde Maas and the Bergse Maas...

.

History

The hydrological distribution of the Maas changed during the later Middle Ages, when a major flood forced it to shift its main course towards the Merwede
Merwede
The Merwede is the name of several interconnected stretches of river in The Netherlands, all part of the Rhine-Meuse-Scheldt delta. The Meuse river joins the Waal at Woudrichem to form the Boven Merwede...

 river. However, during another series of severe floods the Maas found an additional path towards the sea near Geertruidenberg
Geertruidenberg
Geertruidenberg is a city and municipality in the province North Brabant in the south of the Netherlands. The city, named after Saint Gertrude of Nivelles, received city rights in 1213 from the count of Holland. The fortified city prospered until the 15th century.Today, the municipality of...

, resulting in the creation of the Biesbosch
Biesbosch
De Biesbosch , is one of the largest national parks of the Netherlands and one of the last freshwater tide areas in Europe. The Biesbosch consists of a rather large network of rivers and smaller and larger creeks with islands. The vegetation is mostly willow forests, although wet grasslands and...

 wetlands and Hollands Diep
Hollands Diep
Hollands Diep is a wide river in the Netherlands and an estuary of the Rhine and Meuse river. Through the Scheldt-Rhine Canal it connects to the Scheldt river and Antwerp....

 estuaries. Thereafter, the Maas split near Heusden
Heusden
Heusden is a municipality and a city in the South of the Netherlands. It is located between the cities Waalwijk and 's-Hertogenbosch.- Population centres :...

 into two main distributaries, one flowing north to join the Merwede, and one flowing directly to the sea. This latter branch is the current Oude Maasje. The branch eventually silted up, and in 1904 a new parallel channel was dug in the drainage basin, the Bergse Maas
Bergse Maas
The Bergse Maas is a canal that was constructed in 1904 to be a branch of the Maas River in the Dutch province of North Brabant. The Maas splits near Heusden into the Afgedamde Maas and the Bergse Maas...

. This channel then took over the functions of the silted-up branch, which has since been known as the Oude Maasje. At the same time, the branch leading to the Merwede was damned at Heusden, (and has since been known as the Afgedamde Maas
Afgedamde Maas
The Afgedamde Maas is a former distributary of the Maas River in the Dutch province of North Brabant. The Maas splits near Heusden with one channel flowing north until its confluence with the river Waal to form the Merwede, while the other continues west as the main distributary of the Maas...

) so that the vast majority of water from the Maas now enters the old Hollands Diep estaury, rather than mixing with the Rhine distributaries. Like many old river beds in the Netherlands, the Oude Maasje now primarily acts to drain the surrounding fields, and does not receive water from the Maas river. However, it drains into the Bergse Maas near Geertruidenberg, therefore retaining a connection with the Maas.
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