Comparação de duas metodologias de obtenção da equação de chuvas intensas para a cidade de Caraguatatuba (SP)

Martins, Daniela; Kruk, Nadiane Smaha; Magni, Nelson Luiz Goi; Queiroz, Paulo Ivo Braga de

doi:10.4322/dae.2016.033

Cited by 7 publications

(13 citation statements)

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“…Esse padrão das curvas IDF para Tucano segue o comportamento típico a ser esperado, evidenciado por Martinotto et al (2016) que constataram pouca diferença de intensidade conforme a duração seja maior e a intensidade menor, e que essa diferença também é mais acentuada conforme menor a duração e maior a intensidade, entre todos os tempos de retorno analisados.…”

Section: Duraçãounclassified

“…Estudos que abordam essa relação ao longo do país são abundantes, como referência pode-se citar: Garcia et al (2011), Teodoro et al (2014), Caldeira et al (2015), Bielenki Júnior et al (2016, Martinotto et al (2016), Penner, Lima (2016. Este tipo de estudo vem se tornando abrangente na região nordeste do Brasil, sendo identificados na literatura científica, os realizados por Rodrigues et al (2008), Freire et al (2012), Aragão et al (2013), Campos et al (2014), Fechine Sobrinho et al (2014, Campos et al (2015), Passos et al (2017).…”

Section: Introductionunclassified

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Relações intensidade-duração-frequência de precipitações para o município de Tucano, Bahia

Nascimento¹,

Jesus

2017

AGROPECUÁRIA NO SEMIÁRIDO

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O conhecimento da intensidade-duração-frequência das chuvas intensas é fundamental para os projetos de obras hidráulicas e planejamentos agrícolas. Sendo assim, o presente estudo tem como objetivo gerar as intensidades de chuvas, relacionando com as diferentes durações e frequências de precipitação, obtendo as curvas IDF para o município de Tucano, Bahia. A obtenção dos parâmetros da equação IDF foi realizada através do Plúvio 2.1, e para a estimativa da intensidade de chuva foram considerados os tempos de retorno de: 1, 2, 5, 10, 20, 30, 50 e 100 anos, analisando as durações de 15, 30, 60, 120, 180, 240, 360, 480, 600, 720 e 1440 minutos. O maior valor de precipitação foi de 216,74 mm/h com 15 min de duração e um tempo de retorno de 100 anos, e o menor de 3,35 mm em uma chuva de 1440 min com um período de retorno de 1 ano. O estudo permitiu elaborar a equação de intensidade de chuva e as curvas IDF para o município de analisado, as quais apresentaram um comportamento padrão para a relação entre as grandezas.

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Section: Duraçãounclassified

Section: Introductionunclassified

Relações intensidade-duração-frequência de precipitações para o município de Tucano, Bahia

Nascimento¹,

Jesus

2017

AGROPECUÁRIA NO SEMIÁRIDO

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“…However, in order to obtain better precision in rainfall intensity estimates, some authors establish multiple IDF curves, with two or more distinct equations, valid for certain rainfall duration ranges. Martins et al (2017) justify this procedure by the distinct behavior of the different types of rains. Rainfall of shorter durations has the convection effect more frequent, whereas rains with longer durations can have combined effects of orography and of fronts and thus present different behavior.…”

Section: Introductionmentioning

confidence: 99%

“…Rainfall of shorter durations has the convection effect more frequent, whereas rains with longer durations can have combined effects of orography and of fronts and thus present different behavior. Pompeu (1992), Bielenki Júnior et al (2016 and Martins et al (2017) used the 60 min limit for the validity of the equations. Back et al (2011) used the limit with 120 minutes to adjust the equations of intense rainfall with rainfall data from Santa Catarina.…”

Section: Introductionmentioning

confidence: 99%

Alternative model of intense rainfall equation obtained from daily rainfall disaggregation

Back

2020

RBRH

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The objective of this work was to propose an alternative model of IDF equation based on the disaggregation of daily rainfall. Data from the rainfall gauge station code 02649018 of the Brazilian National Water Agency from the period 1968 to 2011 were used. Several extreme event probability distributions were adjusted. Rainfall intensity with a return period of 2 to 100 years and durations of 5 to 1440 minutes were estimated using the relationships between rainfall for different durations. The four coefficients of the traditionally used IDF equation were adjusted, obtaining a sum of squares of deviations equal to 695.1 (mm.h-1)2 and standard error of estimation equal to 2.69 mm.h-1. For the model of the intense rainfall equation proposed, that relates the rain intensity and duration with the maximum daily rainfall, the sum of squares of the deviations was 33.6 (mm.h-1)2 and the standard estimated error was 0.59 mm.h-1. Including the return period in the model, we obtained squares of the deviations of 129.4 (mm.h-1)2, with a standard error of estimation of 1.16 mm.h-1. The models proposed have, besides better estimation accuracy, the advantages of facilitating the updating only by updating the maximum daily precipitation and sub serve the spatial representation.

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“…Intensity-duration-frequency equations are determined using traditional methods based on data from rainfall stations (Martins et al, 2017;Tfwala et al, 2017). In the absence or scarcity of long data series, information from rainfall stations is gathered, and the maximum 1-day rainfall is clipped to shorter rainfall events, thus allowing the fitting of equations (Penner and Lima, 2016;Rangel and Hartwig, 2017;Dias and Penner, 2019).…”

Section: Introductionmentioning

confidence: 99%

Extreme rainfall and IDF equations for Alagoas State, Brazil

2020

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Intensity-duration-frequency (IDF) equations have important applications in several engineering areas such as urban drainage designs, hydrological modeling, and soil conservation projects. This study analyzes the annual maximum series and fits IDF equations for 44 rainfall stations in Alagoas State, Brazil. We adjusted parameters of the Gumbel distribution (GD) and the Generalized Extreme Value (GEV) distribution. The fitting of the observed data to the probability distributions, as well as the selection of the best distribution, were based on the Kolmogorov-Smirnov and Anderson-Darling tests at a 5% significance level. The GEV distribution with parameters obtained by the L-moments method was considered the best in 73% of rainfall stations. The estimated IDF equations showed a good fit, with determination coefficients above 0.991. The maximum rainfall intensities have spatial variation following the climatic zones of the state. The fitted equations allow estimating rainfall intensities from 5 minutes to 24 hours with a return period of 2 to 100 years, and standard error of less than 6.83 mm h-1.

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Comparação de duas metodologias de obtenção da equação de chuvas intensas para a cidade de Caraguatatuba (SP)

Cited by 7 publications

References 2 publications

Relações intensidade-duração-frequência de precipitações para o município de Tucano, Bahia

Relações intensidade-duração-frequência de precipitações para o município de Tucano, Bahia

Alternative model of intense rainfall equation obtained from daily rainfall disaggregation

Extreme rainfall and IDF equations for Alagoas State, Brazil

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