Return period

(years)

Annual chance of exceedance

Rainfall depth

(mm)

SD

Confidence interval

100

0.9900

103.0

26.70

50.2 - 155

50

0.9800

89.4

20.50

49.2 - 130

20

0.9500

71.6

13.30

45.5 - 97.7

10

0.9000

57.6

9.06

39.8 - 75.4

5

0.8000

42.9

6.63

29.9 - 55.9

3

0.6667

31.7

5.88

20.2 - 43.3

2

0.5000

21.3

5.25

11.0 - 31.6