Fitting probability distributions of annual rainfall in Sudan

الملخص EN

Annual rainfall data for fourteen rainfall stations in Sudan during the period 1971 to 2010 were analyzed to select the best probability distribution for every station.

The rainfall data was obtained from the Sudan Meteorological Authority (SMA).

Five distributions were tested, namely Normal, Log normal, Gamma, Weibull and exponential distribution.

Three statistical goodness of fit test were used on the basis of the minimum value of test statistic.

The best fit probability distribution was selected based on the minimum deviation between observed and estimated values.

The normal and gamma distribution were selected as the best fit probability distribution for the annual rainfall in Sudan during the period of the study, respectively.