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| Teixeira,Claudia F. A.; Damé,Rita de C. F.; Rosskoff,José L. C.. |
| The intensity-duration-frequency occurrence ratio (IDF) is a tool commonly used for precipitation-runoff data transformation, which is established from observations of intense precipitations over a period sufficiently long as to allow the occurrence of extremes at the observation site. This study focused on verifying the existence or absence of new data, in terms of IDF ratio, by using partial duration records produced from data on maximum daily disaggregated rainfall for pre determined durations. The partial duration records considered a base value of 55 mm, totaling 279 values. After the rainfall series were established, their independence and seasonality were assessed. Using the Student's t-test statistics, it was established that no new data, as IDF... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Maximum rainfall; Daily disaggregated precipitation; Probability models. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162011000400007 |
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| Damé,Rita de C. F.; Teixeira-Gandra,Claudia F. A.; Villela,Francisco A.; Santos,Jacira P. dos; Winkler,Antoniony S.. |
| The intensity, duration, and frequency relationship (IDF) of rainfall occurrence may be done through continuous records of pluviographs or daily pluviometer values . The objective of this study was to estimate the intensity-duration-frequency relationships of precipitation, using the method of daily rainfall disaggregation, at weather stations located to the southern half of the state of Rio Grande do Sul; comparing them with those obtained by rain gauge records, in places considered homogeneous from the meteorological point of view. The IDF equation parameters were estimated from daily rainfall disaggregation data, using the method of nonlinear optimization. To validate the equations confidence indices and efficiency and the "t" Student test, among... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hydrology; Daily rainfall disaggregation; Heavy rain. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000400006 |
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| Damé,Rita de C. F.; Teixeira,Claudia F. A.; Terra,Viviane S. S.; Rosskoff,José L. C.. |
| Os dados de precipitação diária obtidos de pluviômetros, são mais facilmente encontrados que os pluviográficos, constituindo uma limitação uma vez que, em aplicações hidrológicas, como a transformação chuva-vazão, necessita-se de dados de precipitação de curtas durações. A solução desse problema vem sendo buscada ao longo do tempo através do desenvolvimento de modelos de desagregação de precipitação diária. O objetivo do trabalho é comparar os hidrogramas de projeto resultantes dos hietogramas estimados pelas relações Intensidade-Duração-Frequência (IDF), obtidos por dados pluviométricos e pluviográficos, para a localidade de Pelotas, RS. Para a desagregação da precipitação diária utilizou-se o Método das Relações, enquanto para a lâmina escoada e sua... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hietograma; Método das relações; Intensidade-duração-frequência; Vazão máxima de projeto. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662010000100007 |
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| Dorneles,Viviane R.; Damé,Rita de C. F.; Teixeira-Gandra,Claudia F. A.; Veber,Patrick M.; Klumb,Gustavo B.; Ramirez,Mario A. A.. |
| ABSTRACT Based on historical series, for each locality, equations can characterize the relationship between intensity, duration and frequency of rainfall occurrence. The objective of this study was to present two equations that can describe the occurrence of intense rainfall in Pelotas, RS state, over the period 1982-2015. The two equations were denominated conventional and hybrid, depending on the probabilistic model used. Following the conventional methodology, the parameters of Normal, Log-Normal, Gumbel and Gamma probability distributions were adjusted by the maximum likelihood method for return periods of 2, 5, 10, 20, 25, 50 and 100 years. The maximum intensity values for the hybrid equation were obtained using the empirical model of Weibull,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rainfall records; Intense rainfalls; Maximum rainfall intensities. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000700499 |
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| Dorneles,Viviane R.; Damé,Rita de C. F.; Teixeira-Gandra,Claudia F. A.; Méllo,Letícia B.; Ramirez,Mario A. A.; Manke,Emanuele B.. |
| ABSTRACT Rainfall intensity-duration-frequency (IDF) relationships are a tool that can be used in modeling the transformation of rainfall to runoff, required for the design of hydraulic works. The objective of this study was to verify if there is a significant difference between the intensity-duration-frequency relationships generated using pluviographic records and those determined from pluviometric data. Maximum annual rainfall intensity values were obtained from the disaggregation of maximum daily rainfall and rainfall records in the durations of 5, 10, 15, 20, 30, 60, 120, 360, 720 and 1440 min and for the return periods of 2, 5, 10, 20, 25, 50 and 100 years, in the locality of Pelotas, Rio Grande do Sul state, Brazil (31° 46’ 34’’ S; 52° 21’ 34’’ W,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Intense rains; Pluviometric data; Pluviographic records. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000700506 |
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