| name | image | Average flow (m³/s) | basin (m²) | Height (m) | origin location | mouth location | Length (m) | latitude (°) | longitude (°) | canyon | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Aisne (rivière belge) |  | 187,000,000 | 630 | Ourthe | 31,000 | 50.2604650000 | 5.6726780000 | Map | |||
| Amblève (river) |  | 20 | 1,076,999,936 | Ourthe | 93,000 | 50.3524440000 | 6.2058590000 | Map | |||
| Bloquay |  | Ourthe | 6,000 | ||||||||
| Boé |  | 260 | Ourthe | 5,500 | |||||||
| Bronze | 465 | Ourthe | 12,000 | 50.1833300000 | 5.5666700000 | Map |