01627naa a2200145 a 450000100080000000500110000800800410001910000110006024500710007126000090014252011720015165300130132365300130133677301320134910812362011-10-13       2011    bl uuuu     u00u1 u    #d1 aEpagri  aTime distribution of heavy rainfalls in Florian??polis-SC, Brasil.  c2011  aA knowledge of rainfall time distribution is important for several types of hydrological studies related to surface runoff. This study aims to determine the time distribution pattern of heavy rain events in Florian??polis, Santa Catarina State, Brazil. It employed recording rainfall charts from the meteorological station of Florian??polis (latitude 27?? 35' S, longitude 48?? 34' W, altitude 2 m), from 1976 to 2003. The rainfalls were classified in four types according was defined by Huff (1967) determining the quantities precipitated in the four quartiles of duration. Rainfall is categorized on the type that has the greatest precipitation. Rainfalls of each type were analyzed separately determining the percentage accumulated to 10, 20, 30, 40, 50, 60, 70, 80, 90 and 100% of its total duration. A total of 269 heavy rain events were selected and classified into four types according to the duration quartile in which the greatest amount of precipitation occurred. It is found that type I rain events are more frequent, followed by type II, and these occur with less frequency during the winter, while type IV rain events are distributed throughout the year.  aDrainage  aRainfall  tIn: INTERNATIONAL CONFERENCE ON URBAN DRAINAGE, 12., 2011, Porto Alegre, RS. Proceedings... Porto Alegre, RS: ABRH, 2011. p. 8.