Data/hora: 11/06/2024 13:38:09

Provedor de dados: | 90
País: | Brazil
Título: | Rill erosion on an oxisol influenced by a thin compacted layer
Autores: | Thomaz,Edivaldo Lopes.
Data: | 2013-10-01
Ano: | 2013
Palavras-chave: | Conventional tillage; Plow-pan; Hydropedology; Surface runof; Rill erosion.
Resumo: | The presence of compacted layers in soils can induce subprocesses (e.g., discontinuity of water flow) and induces soil erosion and rill development. This study assesses how rill erosion in Oxisols is affected by a plow pan. The study shows that changes in hydraulic properties occur when the topsoil is eroded because the compacted layer lies close below the surface. The hydraulic properties that induce sediment transport and rill formation (i.e., hydraulic thresholds at which these processes occur) are not the same. Because of the resistance of the compacted layer, the hydraulic conditions leading to rill incision on the soil surface differed from the conditions inducing rill deepening. The Reynolds number was the best hydraulic predictor for both processes. The formed rills were shallow and could easily be removed by tillage between crops. However, during rill development, large amounts of soil and contaminants could also be transferred.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000500027
Editor: | Sociedade Brasileira de Ciência do Solo
Relação: | 10.1590/S0100-06832013000500027
Formato: | text/html
Fonte: | Revista Brasileira de Ciência do Solo  v.37 n.5 2013
Fonte: | info:eu-repo/semantics/openAccess