| name | image | Average flow (m³/s) | basin (m²) | Height (m) | origin location | mouth location | Length (m) | latitude (°) | longitude (°) | canyon | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Río Nièvre (Picardía) |  | 2 | 272,000,000 | 74 | Naours | Somme | 23,000 | 50.0091667200 | 2.0483334100 | Map | |
| Saint-Landon | 170,000,000 | 49 | Somme | 13,300 | 49.9816665600 | 2.0672221200 | Map | ||||
| Scardon | 206,000,000 | 30 | Somme | 12,400 | 50.1127777100 | 1.8224999900 | Map | ||||
| Selle (Somme tributary) |  | 711,000,000 | 110 | Somme | 39,000 | 49.9069444444 | 2.2805555556 | Map | |||
| Sommette |  | 110 | Somme | 15,000 |