عنوان مقاله [English]
Study on climate extremes by using daily data can reveal hidden aspects of climate regions. Because monthly or annual climate data of each parameter can't show effects of data that is too large or too small and can't clarify role of extremes. In this study, significant cycles of very heavy rainfall in Sistan and Balouchestan province during 1968- 2008 were examined. Spectral analysis clarified 3-2, 5-3, 11-5, and 11 + years cycles in very heavy rainfall. Cluster analysis on very heavy rainfall annual and probability of cycles show that there are three groups. Test results of the cluster analysis confirmed by result of discriminant analysis.