| name | image | Average flow (m³/s) | basin (m²) | Height (m) | origin location | mouth location | Length (m) | latitude (°) | longitude (°) | canyon | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Harts River |  | Vaal river | 320,000 | -28.4011000000 | 24.2772000000 | Map | |||||
| Klip River |  | Vaal river | 100,000 | -26.6708000000 | 27.9542000000 | Map | |||||
| Mooi River (Vaal) | Vaal river | -26.8744000000 | 26.9517000000 | Map | |||||||
| Riet River |  | Vaal river | 300,000 | -28.9994444400 | 23.8880555600 | Map | |||||
| Riet River | | Vaal river | -28.9994444400 | 23.8880555600 | Map |