| Frequency P% | 0.1 | 0.2 | 0.5 | 1 | 2 | 5 | 10 | 20 | 50 |
| recurrence interval N year | 1000 | 500 | 200 | 100 | 50 | 20 | 10 | 5 | 2 |
| Qp/m3∙s−1 | 1201 | 1116 | 995 | 906 | 814 | 689 | 589 | 486 | 332 |