Difference between the lower and upper limits of uncertainty levels correspond to durations and return periods
| Durations (hours) | Return periods (year) | ||||||
|---|---|---|---|---|---|---|---|
| 2 (mm) | 5 (mm) | 10 (mm) | 20 (mm) | 30 (mm) | 50 (mm) | 100 (mm) | |
| 0.25 | 16.5 | 21.2 | 25.0 | 29.4 | 32.4 | 36.4 | 42.5 |
| 0.5 | 10.4 | 13.4 | 15.8 | 18.5 | 20.4 | 22.9 | 26.8 |
| 1 | 6.6 | 8.4 | 9.9 | 11.7 | 12.9 | 14.5 | 16.9 |
| 2 | 4.1 | 5.3 | 6.3 | 7.4 | 8.1 | 9.1 | 10.6 |
| 3 | 3.2 | 4.1 | 4.8 | 5.6 | 6.2 | 6.9 | 8.1 |
| 4 | 2.6 | 3.3 | 3.9 | 4.6 | 5.1 | 5.8 | 6.7 |
| 6 | 2.0 | 2.6 | 3.0 | 3.5 | 3.9 | 4.4 | 5.1 |
| 8 | 1.6 | 2.1 | 2.5 | 2.9 | 3.2 | 3.6 | 4.2 |
| Durations (hours) | Return periods (year) | ||||||
|---|---|---|---|---|---|---|---|
| 2 (mm) | 5 (mm) | 10 (mm) | 20 (mm) | 30 (mm) | 50 (mm) | 100 (mm) | |
| 0.25 | 16.5 | 21.2 | 25.0 | 29.4 | 32.4 | 36.4 | 42.5 |
| 0.5 | 10.4 | 13.4 | 15.8 | 18.5 | 20.4 | 22.9 | 26.8 |
| 1 | 6.6 | 8.4 | 9.9 | 11.7 | 12.9 | 14.5 | 16.9 |
| 2 | 4.1 | 5.3 | 6.3 | 7.4 | 8.1 | 9.1 | 10.6 |
| 3 | 3.2 | 4.1 | 4.8 | 5.6 | 6.2 | 6.9 | 8.1 |
| 4 | 2.6 | 3.3 | 3.9 | 4.6 | 5.1 | 5.8 | 6.7 |
| 6 | 2.0 | 2.6 | 3.0 | 3.5 | 3.9 | 4.4 | 5.1 |
| 8 | 1.6 | 2.1 | 2.5 | 2.9 | 3.2 | 3.6 | 4.2 |
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