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	Provedor de dados BABT (1) REA (1) Autor Andrello,Avacir C. (1) Andrello,Avacir Casanova (1) Appoloni,Carlos Roberto (1) Araújo,José Carlos de (1) Guimarães,Maria de Fátima (1) Medeiros,Pedro H. A. (1) Mais... Palavra-chave Soil redistribution (2) 137Cs (1) Radionuclide (1) Red latosol (1) Sediment modelling (1) Semiarid (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2014 (1) 2004 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Uncertainties of the 137Cs technique for validation of soil redistribution modelling in a semiarid meso-scale watershed REA Medeiros,Pedro H. A.; Araújo,José Carlos de; Andrello,Avacir C.. Scarcity of long-term series of sediment-related variables has led watershed managers to apply mathematical models to simulate sediment fluxes. Due to the high efforts for installation and maintenance of sedimentological gauges, tracers have been pointed out as an alternative to validate soil redistribution modelling. In this study, the 137Cs technique was used to assess the WASA-SED model performance at the Benguê watershed (933 km²), in the Brazilian semiarid. Qualitatively, good agreement was found among the 137Cs technique and the WASA-SED model results. Nonetheless, quantitatively great differences, up to two orders of magnitude, were found between the two methods. Among the uncertainties inherent to the 137Cs technique, definition of the reference... Tipo: Info:eu-repo/semantics/article Palavras-chave: 137Cs; Soil redistribution; Sediment modelling; Semiarid. Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000200004 Soil erosion determination in a watershed from northern Paraná (Brazil) using 137Cs BABT Andrello,Avacir Casanova; Appoloni,Carlos Roberto; Guimarães,Maria de Fátima. The objective of this work was study the soil losses or gains in a watershed in the municipal district of Cambé, Paraná using 137Cs as marker for the determination of soil redistributions. A transect sampling was used to evaluate the influence of different tillage on soil erosion. One point, located in a forest area was sampled and analyzed to determine the reference inventory of cesium-137 deposited by fallout. The average value of the reference inventory was 292 Bq m-2. The cesium-137 inventory of the transect samples varied from 80 Bq m-2 to 403 Bq m-2. The sampling points in pasture presented soil losses. The sampling points in coffee plantation did not present losses or gains. The sampling points in soybean cultivated areas presented soil losses. Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil redistribution; Radionuclide; Red latosol. Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000400020 Registros recuperados: 2 Primeira ... 1 ... Última

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