Monthly rainfall distributions in Pematangsiantar

Abstract

Monthly rainfall data for three rainfall stations, Marihat, Bangun and Bah Jambi in Pematangsiantar are investigated during 2007 to 2016 to choose the most appropriate probability distribution in every station. Rainfall data obtained from the Meteorology Climatology and Geophysics Council (BMKG). In this paper Maximum Likelihood Method is used for estimation parameters of distributions Normal, Log Normal and Gamma. After the data is estimated then data is tested using Kolmogorov-Smirnov test. Based on the Kolmogorov-Smirnov test, Normal distribution has been discovered as the most appropriate distribution to represent monthly rainfall in Pematangsiantar.