| i | Return period T (yr) | Probability P (percent) | Gumbel variate y | Flood discharge Q (m3/s) |
| 1 | 1.05 | 95.2 | -1.113 | 447 |
| 2 | 1.11 | 90.1 | -0.838 | 660 |
| 3 | 1.25 | 80 | -0.476 | 939 |
| 4 | 2 | 50 | 0.367 | 1590 |
| 5 | 5 | 20 | 1.5 | 2465 |
| 6 | 10 | 10 | 2.25 | 3044 |
| 7 | 25 | 4 | 3.199 | 3776 |
| 8 | 50 | 2 | 3.902 | 4319 |
| 9 | 100 | 1 | 4.6 | 4858 |
| 10 | 200 | 0.5 | 5.296 | 5396 |