Table1 Comparison of rainfall for each return period
Return period | 20Â km | 5Â km | ||||
|---|---|---|---|---|---|---|
Present (P20) | Future (F20) | Ratio of increase (F20/P20) | Present (P5) | Future (F5) | Ratio of increase (F5/P5) | |
Annual maximum rainfall (mm/h) | ||||||
 50 | 17.3 | 24.3 | 1.40 | 33.5 | 47.7 | 1.42 |
 20 | 14.2 | 20.6 | 1.45 | 25.8 | 41.2 | 1.60 |
 10 | 12.3 | 16.6 | 1.35 | 20.0 | 32.2 | 1.61 |
Total rainfall (mm/10Â days) | ||||||
 50 | 213.7 | 224.9 | 1.05 | 353.7 | 477.3 | 1.35 |
 20 | 179.0 | 201.0 | 1.12 | 280.4 | 365.4 | 1.30 |
 10 | 152.5 | 168.8 | 1.11 | 229.4 | 275.0 | 1.20 |