Data/hora: 12/06/2024 15:17:15

Provedor de dados: 	124	
País: 	Brazil	
Título: 	Land use impact on soil erosion at different scales in the Brazilian semi-arid	
Autores: 	Santos,Julio Cesar Neves dos; Andrade,Eunice Maia de; Medeiros,Pedro Henrique Augusto; Guerreiro,Maria João Simas; Palácio,Helba Araújo de Queiroz.	
Data: 	2017-06-01	
Ano: 	2017	
Palavras-chave: 	Hydrological and sedimentological behaviour; Soil loss; Scale effect.	
Resumo: 	ABSTRACT Erosion and sediment transport processes are strongly dependent on the spatial scale and land use. The objective of this study is to analyse the effects of slash and burn of vegetation followed by grass cultivation for grazing, on the hydrological and sedimentological behaviour at different spatial scales in a semiarid region in Brazil. Rainfall, runoff and soil loss were measured during three years (total of 116 rainfall-runoff events) at three spatial scales: 1 m2 and 20 m2 plots and 2.8 ha watershed. During the first year (2009) the native dry tropical forest/Caatinga vegetation was maintained, whereas on the following years (2010 and 2011) the original vegetation was cleared using slash and burn techniques to grow pasture (Andropogon gayanus Kunt). Annual runoff coefficient is highest at the 20 m2 plot among the investigated scales. Runoff presented the same trend in all years. Sediment yield was strongly influenced by the land cover. Slash, burn and pasture cultivation strongly impacted sediment yield: the first two events after the land cover change yielded roughly ten times more sediment than similar events in the years with native cover and after grass development. The change was most noticeable at the catchment scale due to erosion along the stream, redefining the drainage network.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902017000200251	
Editor: 	Universidade Federal do Ceará	
Relação: 	10.5935/1806-6690.20170029	
Formato: 	text/html	
Fonte: 	Revista Ciência Agronômica  v.48 n.2 2017	
Fonte: 	info:eu-repo/semantics/openAccess