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Equação de chuvas para Fortaleza-CE com dados do pluviógrafo da UFC

Francisco Osny Enéas da SilvaFrancisco Flávio Rocha Paláciode 30 anos de registros pluviográficos (1970-1999) da estação climatológica da Universidade Federal do Ceará. Foram avalia-das séries anuais de eventos de intensidades médias máximas de chuvas para durações de 5, 10, 20, 30, 45, 60 e 120 minutos. O processo resultou da análise de 611 hietogramas de precipitação obser-vados no períodoJosé Nilson Beserra Camposde 30 anos de registros pluviográficos (1970-1999) da estação climatológica da Universidade Federal do Ceará. Foram avalia-das séries anuais de eventos de intensidades médias máximas de chuvas para durações de 5, 10, 20, 30, 45, 60 e 120 minutos. O processo resultou da análise de 611 hietogramas de precipitação obser-vados no período

Revista DAEjournal2013pt

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Litsenziya: cc-by-nc

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Annotatsiya

The article introduces an intensity-duration-frequency (IDF) equation for the city of Fortaleza from 30 years of pluviographic records (1970-1999) of the climatological station of the Federal University of Ceará. The equation was built based on annual series of maximum averages of rainfall intensities for durations of 5, 10, 20, 30, 45, 60 and 120 minutes. The case resulted from the analysis of 611 rainfall hyetograph observed in the period. In determining the parameters of the equation IDF was applied the Gumbel-Chow method. The data were adjusted to a Gumbel probability distribution function, and to defining the rain equation applied the method described by Wilken (1978). The equation is valid for return periods from 5 to 100 years and for rainfall durations up to 120 minutes. The results of the new equation were compared with values obtained by the application of three previous equations. The first two were developed in the 70’s and 80’s of the twentieth century, and the third, in year 2008.

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Environmental and biological studies Geography and Environmental Studies

Identifikatorlar

DOI: 10.4322/dae.2014.106

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