| name | image | Average flow (m³/s) | basin (m²) | Height (m) | origin location | mouth location | Length (m) | latitude (°) | longitude (°) | canyon | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Canal Plassendale-Nieuport |  | Canal Bruges-Ostende | Yser | 21,000 | 51.2100000000 | 3.0041666667 | Map | ||||
| Ey Becque |  | 78,800,000 | 33 | Yser | 19,500 | ||||||
| Peene Becque |  | 92,600,000 | 86 | Yser | 24,000 | 50.9013888889 | 2.4786111111 | Map | |||
| Zwyne Becque | 18 | Yser | 7,000 |