Estimate of intense rainfall equation parameters for rainfall stations of the Paraíba State, Brazil

Authors

  • Alcinei Ribeiro Campos Universidade Federal do Rio Grande do Sul, Faculdade de Agronomia
  • João Batista Lopes da Silva Universidade Federal do Sul da Bahia, Campus Paulo Freire
  • Glenio Guimarães Santos Universidade Federal de Goiás, Escola de Agronomia
  • Rafael Felippe Ratke Universidade Federal do Piauí, Campus Professora Cinobelina Elvas
  • Itauane Oliveira de Aquino Universidade Federal do Piauí, Campus Professora Cinobelina Elvas

Keywords:

Hydrology, intensity-duration-frequency equation, rainfall.

Abstract

Rainfall is the primary water source for hydrographic basins. Hence, the quantification and knowledge of its temporal and spatial distribution are indispensable in dimensioning hydraulic projects. This study aimed at assessing the fit of a series of rainfall data to different probability models, as well as estimating parameters of the intensity-duration-frequency (IDF) equation for rain stations of the Paraíba State, Brazil. The rainfall data of each station were obtained from the Brazilian Water Agency databanks. To estimate the maximum daily rainfall of each station and return period (5, 10, 15, 25, 50 and 100 years), the following probability distributions were used: Gumbel, Log-Normal II, Log-Normal III, Pearson III and Log-Pearson III. The estimation of rainfall in durations of 5-1,440 min was carried out by daily rainfall disaggregation. The adjustment of the IDF equation was performed via nonlinear multiple regression, using the nonlinear generalized reduced gradient interaction method. When compared to the data observed, the intense rainfall equations for most stations showed goodness of fit with coefficients of determination above 0.99, which supports the methodology applied in this study.

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Author Biographies

Alcinei Ribeiro Campos, Universidade Federal do Rio Grande do Sul, Faculdade de Agronomia

Engenheiro Agronomo e Mestre em Agronomia (Solos e Nutrção de Plantas) pela Universidade Federal do Piauí. Atualemnte doutorando em Ciencia do Solo pela Universidade Federal do Rio Grande do Sul.

João Batista Lopes da Silva, Universidade Federal do Sul da Bahia, Campus Paulo Freire

Engenheiro Agrícola e Ambiental , Mestre em Engenharia Agrícola, na área de Recursos Hídricos e Ambientais, e Doutor em Engenharia Agrícola, na área de Recursos Hídricos e Ambientais, Pós-Doutor em Meteorologia Agrícola pela Universidade Federal de Viçosa e Professor na Universidade Federal do Sul da Bahia, Campus Paulo Freire (Teixeira de Freitas)

Glenio Guimarães Santos, Universidade Federal de Goiás, Escola de Agronomia

Engenheiro Agronômico, Dr. Solo e Água, Universidade Federal de Goiás - UFG, Escola de Agronomia: EA/UFG - Goiânia, Goiás, Brasil

Rafael Felippe Ratke, Universidade Federal do Piauí, Campus Professora Cinobelina Elvas

Engenheiro Agrônomo, Doutor em Agronomia com ênfase em Solo e Água pela UFG-Goiânia-GO, Professor Adjunto Manejo e Fertilidade do Solo Coordenador do Centro de Análises de Solo Universidade Federal do Piauí Campus Professora Cinobelina Elvas Bom Jesus-PI

Itauane Oliveira de Aquino, Universidade Federal do Piauí, Campus Professora Cinobelina Elvas

Engenheira Agrônoma pela Universidade Federal do Piauí, Campus Professora Cinobelina Elvas

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Published

2017-03-03

How to Cite

CAMPOS, A. R.; DA SILVA, J. B. L.; SANTOS, G. G.; RATKE, R. F.; DE AQUINO, I. O. Estimate of intense rainfall equation parameters for rainfall stations of the Paraíba State, Brazil. Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics], Goiânia, v. 47, n. 1, p. 15–21, 2017. Disponível em: https://revistas.ufg.br/pat/article/view/43821. Acesso em: 21 nov. 2024.

Issue

v. 47, n. 1, Jan./Mar. 2017

Section

Research Article

License

Authors will not be paid for published articles and must waive their copyright in favor of the PAT journal. On the other hand, they are solely responsible for the content of those articles, even if the Editor holds the right to adjust them to the norms of the journal. Authors are allowed to publish their articles simultaneously in their institutional repositories, as soon as the original publication at the PAT journal is mentioned.