Dreierwalder Aa (also: Ibbenbürener Aa, Ledder Mühlenbach, Hörsteler Aa) is a river of North Rhine-Westphalia, Germany. It flows into the Speller Aa in Spelle.
This article may be expanded with text translated from the corresponding article in German. (October 2011) Click [show] for important translation instructions.
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| Dreierwalder Aa | |
|---|---|
| Location | |
| Country | Germany |
| State | North Rhine-Westphalia |
| Physical characteristics | |
| Mouth | |
• location | Speller Aa |
• coordinates | 52.3618°N 7.4751°E / 52.3618; 7.4751 |
| Length | 36.1 km (22.4 mi) [1] |
| Basin size | 139 km2 (54 sq mi) [1] |
| Basin features | |
| Progression | Speller Aa→ Große Aa→ Ems→ North Sea |
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