Back Radolfzeller Aach ALS رادولفزيلر آخ ARZ Radolfzeller Aach CEB Radolfzeller Aach Czech Radolfzeller Aach Danish Radolfzeller Aach German Radolfzeller Aach French Radolfzeller Aach Italian Radolfzeller Aach LB Radolfzeller Aach Dutch
| Radolfzeller Aach | |
|---|---|
 Aachtopf, view from the Radolfzeller Aach source in the direction of the flow | |
 Map, with place names in Alemannic | |
| Location | |
| Country | Germany |
| State | Baden-Württemberg |
| District | Konstanz |
| Cities | |
| Physical characteristics | |
| Source | |
| • location | Aachtopf in Aach |
| • coordinates | 47°50′48″N 8°51′29″E / 47.84667°N 8.85806°E |
| • elevation | 475 m (1,558 ft) |
| Mouth | |
• location | into Untersee between Radolfzell and Moos |
• coordinates | 47°42′57″N 8°56′28″E / 47.71583°N 8.94111°E |
• elevation | 395 m (1,296 ft) |
| Length | 32.0 km (19.9 mi) [1] |
| Basin size | 255 km2 (98 sq mi) [1] |
| Discharge | |
| • average | 10 m3/s (350 cu ft/s) |
| Basin features | |
| Progression | Rhine→ North Sea |
| TVC | DE/2172 |
The Radolfzeller Aach (also known as Hegauer Aach) is a right or north tributary of the Rhine in the Hegau region, southern Baden-Württemberg (Germany). It is approximately 32 km (20 mi) long and drains into Lower Lake Constance. Most of its waters derive from the Danube river through the Danube Sinkhole.