DISTRIBUIÇÃO TEMPORAL DE CHUVAS PARA SEIS MUNICÍPIOS DO OESTE BAIANO, BAHIA/BR

Abstract

Knowing the distribution of rainfall in the West of Bahia region, over a historical series, is a fundamental support for agricultural planning. In this sense, the objective of this work was to evaluate the annual and monthly variability of rainfall, based on a 21-year historical series of rainfall data, for the municipalities of Jaborandi, Correntina, Barreiras, São Desidério, Luís Eduardo Magalhães and Cocos, Oeste from Bahia/Brazil, quantifying the number of dry and rainy days that occurred during the studied period. Rainfall data were collected on the Agritempo portal provided by the Brazilian Agricultural Production Company (EMBRAPA). After consultation, the historical series of data were downloaded, tabulated, processed and analyzed using an Excel spreadsheet. A series of annual maximums was submitted to verification of the adherence of the observed (collected) data, through the application of the Gumbel probability distribution model, it was verified that the adjusted data are in the same trend as those observed for all municipalities. Rainy days appear only on some days of the summer, showing that the climate of the region is characterized by two very distinct periods, one rainy and the other dry, in summer it rains much more than in winter. The great variability of rainy days over the years in all municipalities. For producers in these municipalities in Western Bahia, especially grain producers, it is necessary to plan their harvest well, minimizing the chances of a long period of drought.