| name | image | Average flow (m³/s) | basin (m²) | Height (m) | origin location | mouth location | Length (m) | latitude (°) | longitude (°) | canyon | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Topino |  | 10 | 1,231,000,064 | 649 | Chiascio | 77,000 | 43.0233333333 | 12.6522222222 | Map | ||
| Rasina (fiume) | 0 | Chiascio | 17,000 | ||||||||
| Saonda | 0 | 37,000,000 | Chiascio | 18,000 | |||||||
| Tescio |  | 2 | 871 | Chiascio | 20,000 | 43.0750950000 | 12.5495130000 | Map |