EQUAÇÕES DE INTENSIDADE-DURAÇÃO-FREQUÊNCIA PARA A BACIA DO RIO MARACUJÁ (MG) COM BASE NA DESAGREGAÇÃO DE CHUVAS DIÁRIAS

Código

XXIV-SBRH0669

Autores

Camila Coelho Welerson, Rafael Arcanjo de Oliveira Filho, ANTENOR RODRIGUES BARBOSA JUNIOR

Tema

SR02- Processos hidrológicos e meio ambiente

Resumo

The calculation and estimation of rainfall, through statistical methods and climatological data, allows obtaining important meteorological and mathematical information for the correct planning of preventive measures by the government that are capable of minimizing/avoiding the effects caused by natural disasters. In the development of engineering projects, it is always important to be based on precise hydrological studies, such as the frequency, intensity and duration of various magnitudes that require statistical treatment, in order to determine a project rainfall (of high intensities in short periods of time). In this sense, this work aims to perform the adjustment of IDF equations in the hydrographic basin of the Maracuja river, in Minas Gerais. The highest annual rainfall of longer durations were selected and statistically treated by the Weibull method. The Gumbel-Chow and Log-Normal probability distributions were used to adjust the extreme values, followed by the assembly of the IDF equations. Difficulties were encountered with the scarcity of some data and resources for the complete physical and hydrological characterization of the Maracuja river basin. However, the use of the Gumbel-Chow probability distribution model produced satisfactory results in obtaining maximum daily rainfall, thus admitting that there is no need to use other probability distribution models to determine these rainfalls.