| name | image | Average flow (m³/s) | basin (m²) | Height (m) | origin location | mouth location | Length (m) | latitude (°) | longitude (°) | canyon | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Senne (river) |  | 6 | 1,164,000,000 | 123 | Dyle | 103,000 | 50.5601750000 | 4.0880138889 | Map | ||
| Pisselet | Dyle | 9,000 | 50.7500000000 | 4.6500000000 | Map | ||||||
| Demer |  | 2,200,000,000 | Dyle | 85,000 | 50.7993055556 | 5.5222638889 | Map | ||||
| Ijse |  | Groenendael | Dyle | 20,000 | 50.8231830000 | 4.6413770000 | Map | ||||
| Lasne |  | 109,000,000 | Plancenoit | Dyle | 26,000 | 50.7928800000 | 4.6375700000 | Map |