Daily rainfall disaggregation for Tocantins State, Brazil

Detalhes bibliográficos
Autor(a) principal: Silva Neto, Virgilio Lourenço da
Data de Publicação: 2017
Outros Autores: Viola, Marcelo Ribeiro, Silva, Demetrius David da, Mello, Carlos Rogério de, Pereira, Silvio Bueno, Giongo, Marcos
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFLA
Texto Completo: http://repositorio.ufla.br/jspui/handle/1/29451
Resumo: In order to design effective Brazilian hydraulic structures, it is necessary to obtain data relating to short-duration intense rainfall from historical series of daily rainfall. This recurring need can be fulfilled by rainfall disaggregation methodology. The objective of this study was to determine the intense rainfall disaggregation constants for the State of Tocantins and to compare these constants with those obtained for other regions of Brazil. For the modeling of the frequency of intense rainfall of different durations of less than 24 hours, the Gumbel probability distribution (GPD) was employed using rainfall series from 10 locations in Tocantins state. The results showed that the GPD was adequate by the Kolmogorov-Smirnov and Chi-square tests. The disaggregation constants presented low variability values for different return periods (from 10 to 100 years); the values for Tocantins state are: h12h/h24h=0.93, h6h/h24h=0.86, h4h/h24h=0.82, h3h/h24h=0.78, h2h/h24h=0.72, h1h/h24h=0.61, h50min/h1h=0.92, h40min/h1h=0.83, h30min/h1h=0.68, h20min/h30min=0.76 e h10min/h30min=0.46. The comparison of the results with those from studies developed for other Brazilian regions showed variations of up to -62.30%, allowing us to conclude that the use of local constants is important in the process of rainfall disaggregation.
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spelling Daily rainfall disaggregation for Tocantins State, BrazilDesagregação de chuvas diárias para o estado do Tocantins, BrasilHydrologyRainfall disaggregationHidrologiaDesagregação de precipitaçãoIn order to design effective Brazilian hydraulic structures, it is necessary to obtain data relating to short-duration intense rainfall from historical series of daily rainfall. This recurring need can be fulfilled by rainfall disaggregation methodology. The objective of this study was to determine the intense rainfall disaggregation constants for the State of Tocantins and to compare these constants with those obtained for other regions of Brazil. For the modeling of the frequency of intense rainfall of different durations of less than 24 hours, the Gumbel probability distribution (GPD) was employed using rainfall series from 10 locations in Tocantins state. The results showed that the GPD was adequate by the Kolmogorov-Smirnov and Chi-square tests. The disaggregation constants presented low variability values for different return periods (from 10 to 100 years); the values for Tocantins state are: h12h/h24h=0.93, h6h/h24h=0.86, h4h/h24h=0.82, h3h/h24h=0.78, h2h/h24h=0.72, h1h/h24h=0.61, h50min/h1h=0.92, h40min/h1h=0.83, h30min/h1h=0.68, h20min/h30min=0.76 e h10min/h30min=0.46. The comparison of the results with those from studies developed for other Brazilian regions showed variations of up to -62.30%, allowing us to conclude that the use of local constants is important in the process of rainfall disaggregation.Para o dimensionamento da estrutura hidráulicas do Brasil, é necessário a obtenção de dados de chuvas intensas de curta duração a partir de séries históricas de chuva diária. Esta situação recorrente pode ser atendida pela metodologia de desagregação de chuvas. Objetivou-se neste trabalho determinar constantes de desagregação de chuvas intensas para o Estado do Tocantins e proceder a comparação destas constantes com aquelas obtidas para outras regiões do Brasil. Para a modelagem da frequência das chuvas intensas de diferentes durações, foi empregada a distribuição de probabilidades Gumbel, tendo sido utilizadas séries pluviográficas de 10 localidades do estado do Tocantins. Os resultados mostraram que a distribuição de probabilidades Gumbel foi considerada adequada pelos testes Kolmogorov-Smirnov e Qui-quadrado. Observou-se que as constantes de desagregação apresentaram valores praticamente invariáveis para tempos de retorno entre 10 e 100 anos, tendo sido obtidas as seguintes constantes médias para o estado do Tocantins: h12h/h24h=0,93, h6h/h24h=0,86, h4h/h24h=0,82, h3h/h24h=0,78, h2h/h24h=0,72, h1h/h24h=0,61, h50min/h1h=0,92, h40min/h1h=0,83, h30min/h1h=0,68, h20min/h30min=0,76 e h10min/h30min=0,46. A comparação dos resultados com os de estudos desenvolvidos para outras regiões brasileiras mostrou variações de até -62,30%, permitindo se concluir que a utilização de constantes locais é importante no procedimento de desagregação de chuvas.Instituto de Pesquisas Ambientais em Bacias Hidrográficas2018-06-13T19:55:01Z2018-06-13T19:55:01Z2017-07info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfSILVA NETO, V. L. da et al. Daily rainfall disaggregation for Tocantins State, Brazil. Revista Ambiente & Água, Taubaté, v. 12, n. 4, p. 605-617, Jul./Aug. 2017.http://repositorio.ufla.br/jspui/handle/1/29451Revista Ambiente & Águareponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLAhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessSilva Neto, Virgilio Lourenço daViola, Marcelo RibeiroSilva, Demetrius David daMello, Carlos Rogério dePereira, Silvio BuenoGiongo, Marcoseng2023-05-02T18:07:58Zoai:localhost:1/29451Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2023-05-02T18:07:58Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false
dc.title.none.fl_str_mv Daily rainfall disaggregation for Tocantins State, Brazil
Desagregação de chuvas diárias para o estado do Tocantins, Brasil
title Daily rainfall disaggregation for Tocantins State, Brazil
spellingShingle Daily rainfall disaggregation for Tocantins State, Brazil
Silva Neto, Virgilio Lourenço da
Hydrology
Rainfall disaggregation
Hidrologia
Desagregação de precipitação
title_short Daily rainfall disaggregation for Tocantins State, Brazil
title_full Daily rainfall disaggregation for Tocantins State, Brazil
title_fullStr Daily rainfall disaggregation for Tocantins State, Brazil
title_full_unstemmed Daily rainfall disaggregation for Tocantins State, Brazil
title_sort Daily rainfall disaggregation for Tocantins State, Brazil
author Silva Neto, Virgilio Lourenço da
author_facet Silva Neto, Virgilio Lourenço da
Viola, Marcelo Ribeiro
Silva, Demetrius David da
Mello, Carlos Rogério de
Pereira, Silvio Bueno
Giongo, Marcos
author_role author
author2 Viola, Marcelo Ribeiro
Silva, Demetrius David da
Mello, Carlos Rogério de
Pereira, Silvio Bueno
Giongo, Marcos
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Silva Neto, Virgilio Lourenço da
Viola, Marcelo Ribeiro
Silva, Demetrius David da
Mello, Carlos Rogério de
Pereira, Silvio Bueno
Giongo, Marcos
dc.subject.por.fl_str_mv Hydrology
Rainfall disaggregation
Hidrologia
Desagregação de precipitação
topic Hydrology
Rainfall disaggregation
Hidrologia
Desagregação de precipitação
description In order to design effective Brazilian hydraulic structures, it is necessary to obtain data relating to short-duration intense rainfall from historical series of daily rainfall. This recurring need can be fulfilled by rainfall disaggregation methodology. The objective of this study was to determine the intense rainfall disaggregation constants for the State of Tocantins and to compare these constants with those obtained for other regions of Brazil. For the modeling of the frequency of intense rainfall of different durations of less than 24 hours, the Gumbel probability distribution (GPD) was employed using rainfall series from 10 locations in Tocantins state. The results showed that the GPD was adequate by the Kolmogorov-Smirnov and Chi-square tests. The disaggregation constants presented low variability values for different return periods (from 10 to 100 years); the values for Tocantins state are: h12h/h24h=0.93, h6h/h24h=0.86, h4h/h24h=0.82, h3h/h24h=0.78, h2h/h24h=0.72, h1h/h24h=0.61, h50min/h1h=0.92, h40min/h1h=0.83, h30min/h1h=0.68, h20min/h30min=0.76 e h10min/h30min=0.46. The comparison of the results with those from studies developed for other Brazilian regions showed variations of up to -62.30%, allowing us to conclude that the use of local constants is important in the process of rainfall disaggregation.
publishDate 2017
dc.date.none.fl_str_mv 2017-07
2018-06-13T19:55:01Z
2018-06-13T19:55:01Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv SILVA NETO, V. L. da et al. Daily rainfall disaggregation for Tocantins State, Brazil. Revista Ambiente & Água, Taubaté, v. 12, n. 4, p. 605-617, Jul./Aug. 2017.
http://repositorio.ufla.br/jspui/handle/1/29451
identifier_str_mv SILVA NETO, V. L. da et al. Daily rainfall disaggregation for Tocantins State, Brazil. Revista Ambiente & Água, Taubaté, v. 12, n. 4, p. 605-617, Jul./Aug. 2017.
url http://repositorio.ufla.br/jspui/handle/1/29451
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv http://creativecommons.org/licenses/by/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Instituto de Pesquisas Ambientais em Bacias Hidrográficas
publisher.none.fl_str_mv Instituto de Pesquisas Ambientais em Bacias Hidrográficas
dc.source.none.fl_str_mv Revista Ambiente & Água
reponame:Repositório Institucional da UFLA
instname:Universidade Federal de Lavras (UFLA)
instacron:UFLA
instname_str Universidade Federal de Lavras (UFLA)
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reponame_str Repositório Institucional da UFLA
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