Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/45865
Title: Rainfall erosivity and rainfall return period in the experimental watershed of Aracruz, in the coastal plain of Espirito Santo, Brazil
Other Titles: Erosividade da chuva e tempo de retorno na bacia experimental da Aracruz, região dos tabuleiros costeiros brasileiros
Keywords: kinetic energy
R-factor
Universal Soil Loss Equation (USLE)
Energia cinética
Fator R
Issue Date: 2010
Publisher: Sociedade Brasileira de Ciência do Solo
Citation: MARTINS, S. G. et al. Rainfall erosivity and rainfall return period in the experimental watershed of Aracruz, in the coastal plain of Espirito Santo, Brazil. Revista Brasileira de Ciência do Solo, Viçosa, MG, v. 34, n. 3, p. 999-1004, maio/jun. 2010. DOI: https://doi.org/10.1590/S0100-06832010000300042.
Abstract: Knowledge on the factors influencing water erosion is fundamental for the choice of the best land use practices. Rainfall, expressed by rainfall erosivity, is one of the most important factors of water erosion. The objective of this study was to determine rainfall erosivity and the return period of rainfall in the Coastal Plains region, near Aracruz, a town in the state of Espírito Santo, Brazil, based on available data. Rainfall erosivity was calculated based on historic rainfall data, collected from January 1998 to July 2004 at 5 min intervals, by automatic weather stations of the Aracruz Cellulose S.A company. A linear regression with individual rainfall and erosivity data was fit to obtain an equation that allowed data extrapolation to calculate individual erosivity for a 30-year period. Based on this data the annual average rainfall erosivity in Aracruz was 8,536 MJ mm ha-1 h-1 yr -1. Of the total annual rainfall erosivity 85 % was observed in the most critical period October to March. Annual erosive rains accounted for 38 % of the events causing erosion, although the runoff volume represented 88 % of the total. The annual average rainfall erosivity return period was estimated to be 3.4 years.
URI: http://repositorio.ufla.br/jspui/handle/1/45865
Appears in Collections:DCS - Artigos publicados em periódicos



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