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Heavy rainfall maps in Brazil to 5 year return period.
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- Author(s): de Souza, Gabriela Rezende; Pinheiro Bello, Italoema; de Oliveira, Luiz Fernando Coutinho; Vilela Corrêa, Flavia
- Source:
Revista Ambiente e Água; 2019, Vol. 14 Issue 5, p1-10, 10p- Subject Terms:
- Source:
- Additional Information
- Alternate Title: Mapas de Chuvas Intensas no Brasil com Tempo de Retorno de 5 Anos. (Portuguese)
- Subject Terms:
- Abstract: This study created thematic heavy rainfall maps for Brazil, with durations of 5-, 30-, 60- and 120 minutes and 5 years of return period (T). The intensity-duration-frequency (IDF) relationships used were compiled from studies found in the literature (798 locations) and derived for 4411 rainfall gauges available in the Hidroweb information system, totaling 5209 rainfall data collected. To derive IDF relationships, Gumbel's probability distributions were used, with parameters estimated by the method of moments. Distribution adequacy was verified by the Kolmogorov-Smirnov test. Rainfall-intensity values obtained by IDF relationships were spatialized in Geographic Information Systems, allowing elaboration of the thematic maps. Thematic maps enable obtain rainfall intensities for places without rain gauge data and/or precarious time-series data. Therefore, these maps are a great tool for the design of hydraulic structures related to urban and rural micro-drainage. [ABSTRACT FROM AUTHOR]
- Abstract: Este estudo tem como objetivo criar mapas temáticos de chuvas intensas para o Brasil para durações de 5, 30, 60 e 120 minutos e período de retorno de 5 anos (T). As relações intensidadeduração- frequência (IDF) utilizadas foram compiladas a partir de estudos encontrados na literatura (798 locais) e estimadas para 4411 estações pluviométricos disponíveis no sistema de informações Hidroweb, totalizando dados de 5209 estações. Para a derivação das relações IDF, se utilizou a distribuição de probabilidade de Gumbel com parâmetros estimados pelo método dos momentos e aderência da distribuição verificada pelo teste de Kolmogorov-Smirnov. Os valores das intensidades de precipitação obtidos pelas relações IDF foram espacializados em um Sistema de Informações Geográficas, permitindo a criação de mapas temáticos. Os mapas temáticos permitem obter intensidades de precipitação para locais sem dados de pluviometria e/ou dados de séries temporais precários. Portanto, esses mapas são uma ótima ferramenta para o projeto de construções hidráulicas relacionadas à drenagem urbana e rural. [ABSTRACT FROM AUTHOR]
- Abstract: Copyright of Revista Ambiente e Água is the property of Revista Ambiente e Agua and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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