| Catchment | Hydrological risk level | ||
| 0.1% | 1.0% | 5.0% | |
| Nyamambisi | 167 | 186 | 230 |
| Gatswane 1 | 224 | 248 | 210 |
| Gatswane 2 | 286 | 318 | 200 |
| Shashe | 350 | 388 | 222 |