| name | image | Average flow (m³/s) | basin (m²) | Height (m) | origin location | mouth location | Length (m) | latitude (°) | longitude (°) | canyon | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Dreierwalder Aa |  | 138,946,000 | Speller Aa | 36,083 | 52.3618000000 | 7.4751400000 | Map | ||||
| Vorthgraben | Speller Aa | 2,084 | 52.3137000000 | 7.8167100000 | Map |