Westerwolder Aa
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Westerwolder Aa, Westerwoldsche Aa, Westerwoldse Aa |
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 Westerwoldsche Aa near Nieuweschans |
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| Data | ||
| location | Groningen Province | |
| River system | Ems | |
| Drain over | Unterems → North Sea | |
| Origin of the Ruiten-Aa |
Ter Apel in the municipality of Vlagtwedde , The Netherlands 52 ° 52 ′ 13 ″ N , 7 ° 5 ′ 12 ″ E |
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| Source height | 10 m above sea level NN | |
| muzzle | in the Dollart coordinates: 53 ° 14 ′ 11 " N , 7 ° 12 ′ 22" E 53 ° 14 ′ 11 " N , 7 ° 12 ′ 22" E |
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| Mouth height | 0 m above sea level NN | |
| Height difference | 10 m
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| Small towns | Nieuweschans | |
| Communities | Vlagtwedde , Bellingwedde , Oldambt | |
| From the Nieuweschans border river between Germany and the Netherlands | ||
The Westerwolder Aa , also mostly recorded in German maps with the Dutch name Westerwoldsche Aa , is a border river between Germany and the Netherlands .
The Westerwoldsche Aa is created near Wessinghuizen (municipality of Stadskanaal ) from the union of the Mussel Aa and the much larger Ruiten Aa, which is therefore to be regarded as its hydrological upper course.
River course
The course of the Ruiten Aa begins today on the eastern outskirts of Ter Apel in the municipality of Vlagtwedde . It flows slightly meandering northwards. The village of Sellingen, also part of Vlagtwedde, lies between it and the Ruiten-Aa-Kanaal, which is parallel to the east . 10 km further north it flows between the core town of Vlagtwedde and Onstwedde to the west . Here the Mussel-Aa-Kanaal crosses it on the Haverlandse Brug. The Mussel Aa flows from the left less than two kilometers further. From this confluence on, the river is called Westerwoldsche Aa .
It now flows in the municipality of Bellingwedde first through Wedde and then east past Blijham . There the Veendiep connects it with the Verenigt Kanaal (BI Tijdenskanaal) which runs 6 km to the east. From its mouth it is navigable and has been severely straightened. The navigable Pekel Aa flows from the southwest at Oudeschans , which emerges from the Pekelerhoofddiep at Oude Pekela and flows past the eastern outskirts of Winschoten . From there on, the Westerwoldsche Aa continues its direction to Bad Nieuweschans . From there to where it flows into the Dollart , it forms the border between Germany and the Netherlands.
Its estuary through the Dollart is called Buiten-Aa (Outer Aa) or Schanskerdiep and flows 2½ km westward along the Dutch bank before turning north towards Groote Gat , which can also be counted as part of the river.
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Ruiten Aa – Westerwoldsche Aa in the province of Groningen  = origin of the Ruiten-Aa  = origin and  = mouth of the Mussel-Aa  = mouth of the Pekel-Aa  = mouth of the Westerwoldsche Aa |
Sources of information
- ANWB / VVV Topographical Map No. 4 (Groningen East) and No. 7 (Drenthe East)
literature
- General hydrographic lexicon of all streams and rivers in Upper and Lower Germany , 1741, p. 4, digitized