Erodibilidade e tensão crítica de cisalhamento em solos de estradas não pavimentadas
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Data
2009
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Resumo
The absence of an adequate drainage system in unpaved roads is one of the main factors for their degradation. For adequate
planning knowledge of the resistance parameters of soil is necessary. This study had as its objective the determinatiom of
the erodibility and critical shear stress of unpaved road soils. For this work, a runoff simulator was directly installed on road
channels, under natural conditions. Different flow depths were applied and the soil loss was measured for each depth. The
erodibility and the critical shear stress were determined through adjusted curves relating soil disaggregation and flow shear
stress. The results showed variations in erodibility and in critical shear stress values of the roads. The erodibility values
obtained, when compared with values observed in the literature, evidenced high susceptibility to the erosion for road condi-
tions. These values were higher on silt loam and sandy soils. The critical shear stress values were similar to those observed
in other publications.
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Palavras-chave
Erosão, Estradas vicinais, Modelo hidrológico, Erosion, Earth roads, Runoff simulator
Citação
OLIVEIRA, João F. de; GRIEBELER, Nori P.; CORRECHEL, Vladia; SILVA, Valtercides C. da. Erodibilidade e tensão crítica de cisalhamento de solos em estradas não pavimentadas. Revista Brasileira de Engenharia Agrícola e Ambiental, Campina Grande, v. 13, supl., p. 955-960, 2009.