Relationships between intense rainfall of different durations for disaggregation of daily rainfall in Santa Catarina

The aim of this study was to determine the relationships between rainfalls of different durations for the State of Santa Catarina. The series of annual maximum rainfall were defined with a duration of 5 to 1440 min of thirteen precipitation stations in Santa Catarina. For each duration maximum rainfall were estimated with a return period of 2 to 100 years, based on the Gumbel-Chow distribution. The relationship between the average rainfall of 24 h and one day rain does not depend on the return period, with an average of 1.17 for the State. When analyzing the time reading the daily precipitation it was messed that this ratio varies from 1.12 to 1.20. In relation to 1 h of rain over 24 h of rain it was observed values significantly lower than those normally used.