Revista Brasileira de Climatologia (Oct 2016)

DETERMINING IDF EQUATIONS FOR THE STATE OF RONDÔNIA (DETERMINAÇÃO DE EQUAÇÕES IDF PARA O ESTADO DE RONDÔNIA)

  • Vinicius Alexandre Sikora de Souza,
  • Rafael Henrique Serafim Dias,
  • Eliomar Pereira da Silva Filho,
  • Marcos Leandro Alves Nunes,
  • Claudia Daza Andrade,
  • Ana Lúcia Denardin da Rosa

DOI
https://doi.org/10.5380/abclima.v18i0.44119
Journal volume & issue
Vol. 18, no. 0

Abstract

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This study aimed to estimate the Intensity-Duration-Frequency (IDF) function of extreme pluviometric events for the State of Rondônia in Brazil. This study used forty-one pluviometric stations with over 10 years of historic data. Data were analyzed following the Gumbel distribution and related (through disaggregating of daily rains) to return periods comprising from 2 to 100 years and pluviometric durations from 5 minutes to 24 hours. Furthermore, areas of influence for the applicability of IDF equations were determined by Voronoi diagrams. The IDF equations were validated with the help of the regression coefficient (r²) and the Wilcoxon-Mann-Whitney hypothesis test showed that its use is feasible.

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