DETERMINAÇÃO DO INÍCIO E TÉRMINO DA ESTAÇÃO CHUVOSA NO ESTADO DO PARANÁ

• Autor(a) principal: Pereira, Lívia Maria Pederzini
• Data de Publicação: 2008
• Outros Autores: Caramori, Paulo Henrique, Ricce, Wilian Silva, Silva, Danilo Augusto, Caviglione, João Henrique
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Revista Geografar
• Texto Completo: https://revistas.ufpr.br/geografar/article/view/13586
• topic: Precipitação; Estudos Climáticos; Variabilidade

Rainfall is one of the more important meteorological variables in climate studies of several regions in Brazil. The previous knowledge of the spatial and temporal distribution of rain makes possible a better planning of the agricultural practices, reducing losses and improving farming conditions. This study had as objective to define the dates of beginning and ending of the rainy season in Paraná State, southern Brazil, which delimits the period when the summer crops are grown. The rainfall data was obtained from 117 weather stations, spatially distributed accross the State, from the Instituto Agronômico do Paraná (IAPAR) and Superintendência de Desenvolvimento de Recursos Hídricos e Saneamento (SUDERHSA). For determination of the beginning of the rainy season the criterion establishes that it must rain at least 20 mm in 2 consecutive days, from 1st of July and, in a subsequent period of 30 days there must not occur 10 consecutive days without precipitation. The end of the rainy season was assumed to be the first date after the 1st of March, from which it did not have rain for a subsequent period of 10 days. The beginning of the rainy season was established as occurring between the first ten-day period of August, in the state coast, and the first ten-day period of October, in the northern areas. The end of the rainy season occurred between the first ten-day period of March in the north and the first ten-day period of May in the southern areas. The results show the characteristic of climatic transition of Paraná state, where there is a big difference in rainfall between the dry winter and the rainy summer season in the north and west, while in the south the rain is more uniformly distributed along the year