Oude Rijn (Utrecht and South Holland)
| Oude Rijn | |
| Old Rhine | |
| River | |
 The Oude Rijn in Leiden.
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| Country | Netherlands |
|---|---|
| Regions | Utrecht, South Holland |
| Source | Leidse Rijn |
| - location | Harmelen, Utrecht |
| - coordinates | 52°05′31.5″N 4°57′48.5″E / 52.092083°N 4.963472°E |
| Mouth | North Sea |
| - location | Katwijk, South Holland |
| - coordinates | 52°12′43″N 4°23′54″E / 52.21194°N 4.39833°ECoordinates: 52°12′43″N 4°23′54″E / 52.21194°N 4.39833°E |
| Length | 52 km (32 mi) |
 Location of Oude Rijn in dark blue.
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The Oude Rijn (Old Rhine) is a branch of the Rhine delta in the Dutch provinces of Utrecht and South Holland. Its present-day length is 52 kilometres.
In Roman times, it was the main Rhine branch, forming the northern border of the Roman Empire. In medieval times, it was used for river transport and there is a towpath along large sections of the river, many parts of which have been upgraded to roads over time. The river silted up in the course of the Middle Ages and had lost all of its importance by the 17th century.
The city of Utrecht was founded at a ford (crossing) near the fork of river Kromme Rijn into the Vecht to the north, and the Oude Rijn to the west. Of the original fork, little remains today and both Vecht and Rijn start from the city moat. For the first few kilometres of its course, the river is channelised and known as Leidse Rijn (Leiden Rhine). It becomes the Oude Rijn after the railway bridge near Harmelen (municipality Woerden). Then it flows westward through Woerden where first the river Lange Linschoten branches off to the south and then the Oude Rijn forms part of the city moats.
After Woerden, the river Grecht branches off to the north and the Oude Rijn continues through the towns of Nieuwerbrug, Bodegraven, and Zwammerdam. Here the river De Meije ends into the Oude Rijn. In Alphen aan den Rijn, the Aar Canal ends in the Oude Rijn at the same location where the river Gouwe branches off to the south. It flows then along Koudekerk aan den Rijn and Hazerswoude-Rijndijk (both part of the municipality of Rijnwoude).
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Wikipedia