Abstract
In order to determine soil losses caused by water erosion, in different situations, erosion prediction models, such as the Universal Soil Loss Equation (USLE), are used. Their application on agricultural and environmental planning depends on the determination of the USLE factors, including erodibility (K factor). The objective of this study was to determine erodibility for the main soil classes of the Brazilian Coastal Plains region, in Aracruz, Espirito Santo State. The experiment was established in the following soils: medium/clayey texture Yellow Argisol (PA1), Haplic Plinthosol (FX), and moderately rocky Yellow Argisol (PA2). For the calculation of soil erodibility, data of erosivity and soil losses, from November 1997 to May 2004, were used. Soil losses samplings were performed for each rainfall event regarded as erosive. The erodibility values were 0.007 Mg h MJ -1 mm -1 ; 0.017 Mg h MJ -1 mm -1 ; and 0.0004 Mg h MJ -1 mm -1 , for PA1, FX, and PA2, respectively.
Highlights
In order to determine soil losses caused by water erosion, in different situations, erosion prediction models, such as the Universal Soil Loss Equation (USLE), are used
Para o cálculo da erodibilidade, foram utilizados dados de erosividade e de perdas de solo de novembro de 1997 a maio de 2004
Transactions of the American Geophysical Union, Washington, DC, v. 39, n. 2, p. 285291, 1958
Summary
In order to determine soil losses caused by water erosion, in different situations, erosion prediction models, such as the Universal Soil Loss Equation (USLE), are used. A determinação direta do fator K é feita por meio da instalação de parcelas de perdas de solo no campo, seja sob chuva natural ou simulada, as quais envolvem altos custos, além de demandar vários anos de coleta de dados (Silva et al 1999). Da mesma forma, a avaliação de treze modelos indiretos de avaliação do fator K, em solos com horizontes B textural, mostrou que nenhum dos métodos foi recomendado para estimar a erodibilidade do solo (Marques et al 1997b). Sugere-se que a determinação deste fator, para os solos brasileiros, seja realizada por meio de experimentos de campo, evitando-se possíveis erros causados pelo uso de metodologias desenvolvidas para outras regiões. Este estudo teve como objetivo determinar, de maneira direta, a erodibilidade (fator K), para as principais classes de solos representativas da região dos Tabuleiros Costeiros, no município de Aracruz (ES)
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