Daily rainfall disaggregation for Tocantins State, Brazil
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , , , |
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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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 |
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Universidade Federal de Lavras (UFLA) |
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UFLA |
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UFLA |
reponame_str |
Repositório Institucional da UFLA |
collection |
Repositório Institucional da UFLA |
repository.name.fl_str_mv |
Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA) |
repository.mail.fl_str_mv |
nivaldo@ufla.br || repositorio.biblioteca@ufla.br |
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1815439106563375104 |