ERODIBILIDADE DE NEOSSOLO QUARTZARÊNICO MEDIDO EM PARCELAS EXPERIMENTAIS NO ESTADO DE SÃO PAULO

Código

PAP055

Autores

Mayra Mitie Ishizuka, Dimaghi Schwamback, Jamil Alexandre Ayach Anache, Edson Cezar Wendland

Tema

HIDROSSEDIMENTOLOGIA NO CONTEXTO DO NEXO

Resumo

Erodibility is one of the variables used in the soil loss estimation through the Revised Universal Soil Loss Equation (RUSLE)which expresses the soil propensity for detachment through the impact of raindrops and shear stresses due runoff. The determination of a particle potential detachment of a given soil class is a very important variable in the soil loss process estimation. Considering this, this paper aims of quantification of the erodibility for the Quartzarenic Neosol (Typic Quartzipsamments) from three experimental plots located in the state of São Paulo. Using data from soil loss in collectors ponds and natural rainfall erosivity (EI30) over the period from 2011 to 2016, the soil erodibility factor was calculated by the ratiobetween these variables. The erodibility for the Quartzarenic Neosol was 0,002 t.ha.h.ha-1.MJ-1.mm-1, which may be considered low. Although the calculated average potential soil loss (13.43 t. ha-1.year-1) using RUSLE has been underestimated while compared the average observed in the field (16.92 tha-1.year-1), it can be considered is a powerful tool in estimating soil loss. Additionally, it is important to continue the soil loss and erosivity monitoring in the experimental plots for a better accuracy in erodibility data and correlation between observed and calculated potential soil loss.