| Aa | |
|---|---|
|  | |
|  | |
|   North Rhine-Westphalia | |
| Location | |
| Country | Germany | 
| State | North Rhine-Westphalia | 
| Physical characteristics | |
| Mouth | |
|  • location | Werre | 
|  • coordinates | 52°07′25″N 8°40′13″E / 52.1236°N 8.6703°E | 
| Length | 26.0 km (16.2 mi) [1] | 
| Basin size | 256 km2 (99 sq mi) [1] | 
| Basin features | |
| Progression | Werre→ Weser→ North Sea | 
Aa (also: Westfälische Aa, "Westphalian Aa") is a river of North Rhine-Westphalia, Germany. It is a left tributary of the Werre, which it joins in Herford. It is formed by the confluence of two small streams in Bielefeld-Milse. In its upper part, it is called Johannisbach.
See also
References
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