Erosividade e Padrões de Chuva para Jataí (GO)

Abstract

The physical characteristics of the rains vary between regions and their knowledge is necessary in decision making in relation to conservation planning. In this work we propose to define the monthly and annual erosive potential, USLE R factor and the rainfall patterns for Jataí (GO). Historical series of meteorological data belonging to the National Institute of Meteorology (INMET) were used. The rainfall data of station code 01751003 Jataí (GO) were digitized, individualized and classified as erosive or non-erosive, and submitted to the Chuveros software for the determination of erosivity indices and other attributes, including rainfall classification for rainfall patterns . The adequacy of the pluviographic data was evaluated using rainfall data, model adjustment and estimation of EI30 and KE> 25 based on the models generated. In the months of October to March accumulated of 84% occurred in annual erosivity (EI30 and KE> 25). The months with the greatest erosive potential occurred from December to March. The predominant rain patterns for Jataí were the advanced, followed by the late and intermediate. The USLE R factor, based on the correlation with the rainfall series, for Jataí-GO is 6,656.0 MJ mm ha-1 h-1.