| Test | Test Variables | Floods | Modules | Low-water |
| Pettitt | t | 1970 | 1971 | 1976 |
| p-value (bilaterale) | 0.047 | 0.004 | <0.0001 | |
| alpha | 0.05 | 0.05 | 0.05 | |
| Buishand | t | 1971 | 1971 | 1976 |
| p-value (bilatérale) | 0.035 | 0.000 | <0.0001 | |
| alpha | 0.05 | 0.05 | 0.05 |