Temporal distribution of heavy rains of Porto União, North Plateau of state of Santa Catarina, Brazil.

Authors

DOI:

https://doi.org/10.18316/rca.v12i2.3808

Keywords:

Heavy Rain, Drainage, Surface Runoff, Hydrology

Abstract

Knowledge of the temporal distribution of rainfall is important in several types of hydrological studies related to runoff. The objective of this work was to determine the patterns of temporal distribution of intense rains of Porto União, Santa Catarina, Brazil. Daily pluviograms of the period from 1972 to 1992 were used. The rains were individualized and then were selected the rains with rainfall above a minimum value, depending on the duration. The rains were classified into four types according to the Huff quartiles. It was evaluated the frequencies of intense rains of each type by season of the year and by rain duration range. The most frequent intense rains are type I (38.8%), followed by type II (30.6%), type IV (16.5%) and type III (14.1%). Intense rains are more frequent in autumn (April to June) (32.9%) and winter (July to September) (24.7%). The highest frequency of intense rainfall (37.6%) for the duration of 24 to 48 hours. For the preparation of the design hietogram in the Northern Plateau region of Santa Catarina it is recommended to use the time distribution curve presented for type I rains with probability of occurrence of 50%.

Author Biography

Álvaro Jos Back, Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina

PEsquisador da Empresa de Pesquisa Agropecuária e Extensao Rurral de Santa Catarina, Estação Experimental de Urussanga

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Published

2018-08-10

Issue

Vol. 12 No. 2 (2018)

Section

Artigos

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