The Nonnenbach is a seven-kilometre-long tributary of the Ahr in the area of Blankenheim in the district of Euskirchen in the German state of North Rhine-Westphalia.
| Nonnenbach | |
|---|---|
| Location | |
| Country | Germany |
| State | North Rhine-Westphalia |
| Reference no. | DE: 271812 |
| Physical characteristics | |
| Source | |
| • location | Dahlem-Schmidtheim |
| • coordinates | 50°24′49″N 6°35′22″E |
| • elevation | 539 m above sea level (NHN) |
| Mouth | |
• location | Ahr near Blankenheim |
• coordinates | 50°25′27″N 6°40′14″E |
• elevation | 407 m above sea level (NHN) |
| Length | 6.992 km [1] |
| Basin size | 10.885 km² [1] |
| Basin features | |
| Progression | Ahr→ Rhine→ North Sea |
| Landmarks | Villages: Nonnenbach |
The source of the Nonnenbach lies in woods about 2 kilometres east of Schmidtheim, on the far side of the B 51 and not far from gravel pits already partly filled with groundwater. It flows past the eponymous village and empties into the Ahr a good 2 kilometres south of Blankenheim. Apart from the Seidenbach and the Günzelbach it is also fed during its short course by the streams of numerous gullies, known locally as Seifen.