Traditionally, the three extreme value distributions
are applied to annual maximum daily rainfall.In this paper, we have used the generalized extreme
value (GEV) distribution, which has the flexibility
of all the other extreme value distributions
The GEV distribution was developed by Jenkinson
(1955), Hosking et al (1985) and Galambos (1987).
The cumulative distribution function (cdf) of the
GEV distribution is as follows.