Geoscience Reference
In-Depth Information
(a)
100.0
50.0
20.0
10.0
20.4.71
14.11.69
31.12.68
5.0
2.0
6.11.69
1.0
0.5
24.11.69
0.2
0.1
0.01
0.02
0.05 0.1 0.2
Duration (hours)
0.5
1.0
2.0 3.0
(b)
50.0
20.0
10.0
5.0
18.9.73
13.11.74
2.0
28.11.73
1.0
12.11.73
10.7.74
Figure 13.11
Maximum
intensity-duration
relationships (a) at Dar es
Salaam, Tanzania for several
convective storms and (b) at
Lampeter, Wales for several
frontal storms. (Redrawn
from Sumner, 1978, published
with permission.)
0.5
0.2
0.1
0.01
0.02
0.05
0.10
0.20
0.50
1.0
2.0
5.0
10.0
20.0
Duration (hours)
estimating extremes, i.e., the frequency of events for which the probability of
occurrence occurs at the ends of the frequency distribution, say the 10% highest
or lowest probability events. The frequent challenge faced is to how use a
comparatively short run of data to estimate the longer term probabilities of very
low probability events.
