Spatial distribution of climatic water balance in different rainfall regimes in the State of Pernambuco

Abstract

To know the weather from year to year is of great value to a proper agricultural planning. The study was conducted in the State of Pernambuco, with data basis of temperature and rainfall of at least 20 years of observations of 45 meteorological stations. The function of density probability of the incomplete gamma distribution was used to evaluate the occurrence of dry, normal and rainy years. The monthly climatic water balance was estimated by the method proposed by Thornthwaite and Mather (1955) and interpolation of data for the plot was made using the Kriging method. The results indicated that the highest rainfall occurred in the Zone da Mata in the south of the State with around 2800 mm year-1. The water excess presented its highest levels in the Zona da Mata mesoregion with availability of nearly 1200 mm year-1 for the rainy years and water deficit was higher in the Sertão Mesoregion of Sertão of San Francisco reaching 1000 mm year-1 , being required full irrigation for the crops.

Weathering of Rhyolites and Soil Formation in an Atlantic Forest Fragment in Northeastern Brazil

“…The presence of these minerals in the clay fraction of the profiles demonstrates the influence of the local climate, hot and humid, for the genesis of soils with degrees of weathering evolution that range from moderate to high (Silva et al, 2013). Halloysite was also identified (Figure 5e).…”

“…The toposequence under study is in a region with As climate, described as hot and humid, with rains in the winter (Köppen, 1931). The mean rainfall is around 2,200 mm, and the mean annual temperature is 24 °C (Silva et al, 2013).…”

Probability of occurrence of water deficits and excess on the climatic conditions of Barreiras, Bahia

“…Probable values of the monthly water excesses in Barreiras-BA. Probability of occurrence of water deficits… Probabilidad de ocurrencia de déficit y excedentes hídricos… Probabilidade de ocorrência de déficit hídrico… Print-ISSN 1983-6325 (On line) e-ISSN 1984 correct knowledge of these variable values for the mesoregions, brings benefits to the producers that can conduct the correct handling of irrigation water (SILVA et al, 2013d).…”

Classificação Climática De Thornthwaite E Sua Aplicabilidade Agroclimatológica Nos Diferentes Regimes De Precipitação Em Pernambuco

“…Levando-se em consideração os riscos que envolvem a produção agrícola (MEIRELES et al, 2003), a falta de dados meteorológicos em determinadas regiões podem fazer com que o produtor agrícola demande uma quantidade de água maior para a cultura do que o necessário, levando a gastos extras e onerando ainda mais a produção, colocando a viabilidade econômica em risco. Por isso é importante associar as informações agrometeorológicas as áreas de geoprocessamento e sistemas de informação geográfica (SIG), pois isto possibilita aos agricultores ajustarem suas atividades às variabilidades e mudanças no clima, levando a redução dos riscos na agricultura (SILVA et al, 2013;SENTELHAS et al, 2008).…”