Data/hora: 23/09/2024 18:53:11

Biblioteca(s): 	Embrapa Instrumentação.	
Data corrente: 	23/11/2023	
Data da última atualização: 	15/01/2024	
Autoria: 	VILLELA, J. M.; ANACHE, J. A. A.; WATANABE, A. M.; FLANAGAN, D. C.; CRESTANA, S.	
Afiliação: 	University of Sao Paulo (USP); Federal University of Mato Grosso Do Sul; University of Sao Paulo (USP); USDA-Agricultural Research Service, National Soil Erosion Research Laboratory, 275 S. Russell St., West Lafayette, IN, 47907, USA; SILVIO CRESTANA, CNPDIA.	
Título: 	Performance evaluation of a water erosion tracer using plot-scale experiments and process-based modeling.	
Ano de publicação: 	2023	
Fonte/Imprenta: 	International Soil and Water Conservation Research. v. 11, 2023.	
Páginas: 	622 - 623	
ISSN: 	2095-6339	
DOI: 	https://doi.org/10.1016/j.iswcr.2023.05.003	
Idioma: 	Inglês	
Conteúdo: 	abstract Socioeconomic and environmental losses caused by water erosion have highlighted the importance of quantifying and understanding the dynamics of soil redistribution in the landscape to develop effective soil management practices. Several methods are applied to estimate erosion/deposition rates and identify sources of sediments, among them, the one that uses rare earth elements (REE) as a tracer stands out. However, an alternative not yet explored that can benefit the accuracy of the estimates provided by the method is using a tracer containing a chemical signature composed of more than one REE. The present study aimed to evaluate the performance of a new water erosion tracer based on montmorillonite labeled with rare earth elements (La40-MMT). The innovative aspects of this La40-MMT tracer include its highly stable multi-chemical signature (Nd3þ, La3þ, and Pr3þ), which enhances tracer detection in the environment, and its low production cost due to the use of an industrial residue in the synthesis process. The tracer was evaluated for a typical soil of the Cerrado biome, using a natural rainfall field-scale plot - NRFP (5 m 20 m) and a physical predictive erosion model (WEPP). The results showed that the La40-MMT tracer could be used to estimate erosion/deposition rates, with agreement between the values observed with the tracer and the WEPP model. Thus, this study confirmed the great potential of La40-MMT as a tool to identify patterns of soil redistribution at the field scale and aid in the validation of erosion models. © 2023 International Research and Training Center on Erosion and Sedimentation, China Water and Power Press, and China Institute of Water Resources and Hydropower Research. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BYNC-ND license.	
Palavras-Chave: 	Deposition; Sediment source; Tracer; WEPP Model.	
Categoria do assunto: 	--	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1158662/1/P-Performance-evaluation-of-a-water-erosion-tracer-using-plot-scale.pdf	
Registro original: 	Embrapa Instrumentação (CNPDIA)	
Exemplares: 	CNPDIA - (18306-1) - UPC - AP - DD - PROCI.23/107 -  - 2023/114 - DIS