Consulta: subjectFacets:"Hydropedology"
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Data/hora: 11/06/2024 04:57:21

Rill erosion on an oxisol influenced by a thin compacted layer
Provedor de dados: 90
Autores: Thomaz,Edivaldo Lopes.
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...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conventional tillage; Plow-pan; Hydropedology; Surface runof; Rill erosion.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000500027

Interrill erodibility of different sandy soils increases along a catena in the Caiuá Sandstone Formation
Provedor de dados: 90
Autores: Thomaz,Edivaldo Lopes; Fidalski,Jonez.
ABSTRACT Soil erosion in tropical areas is a major problem for sustainability in agriculture and soil stability. In the Northwest of Paraná, cassava crop is produced using a conventional tillage system along a catena consisting of different soil classes: Ferralsols (near the summit), Lixisols (mid-slope), and Arenosols (foot-slope). Therefore, differential soil erosion rate and soil degradation are expected along the catena. Here, we test the erodibility of the three sandy soil classes in a representative catena of the Caiuá Sandstone Formation. Disturbed soil samples were collected from a depth of 0.20 m. The soil erodibility test was performed in the laboratory through a multi-drop rainfall simulator. A rainfall intensity of 55 mm h-1 with an energy of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hillslope; Soil-geomorphology; Hydropedology; Conventional tillage; Soil detachment.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832020000100501