Spatial analysis of universal soil loss equation factors of a watershed area relief

Authors

  • Daniela Popim Miqueloni
  • Celia Regina Paes Bueno FCAV/UNESP
  • Antonio Sergio Ferraudo

DOI:

https://doi.org/10.1590/S1678-3921.pab2012.v47.11120

Keywords:

principal component analysis, geostatistics, erosive process

Abstract

The objective of this work was to evaluate the soil loss of an area of springs in the Microbacia do Córrego do Tijuco, SP, Brazil. Spatial analysis of the universal soil loss equation (USLE) factors, in integrated with principal component analysis and geostatistics, was used. The average soil loss estimated for the area was 118.5 Mg ha‑1 per year, which is considered high. Near the urban zone, there was a high interaction of rainfall erosivity and conservation practices, which shows a high‑soil loss, due to the concentration of water from impervious urban layer with a high‑flow velocity. In the water partings, the performance of erodibility was prominent, in contrast to the topographic factor. Areas were observed with joint action of these factors, including sites with gentle slope, but with a high, natural potential of erosion. The interaction of multivariate and geostatistic analyses allows the area stratification, identifies locations with specific properties as to soil loss, and spatialises the erosion factors and their interactions along the landscape.

Author Biographies

Daniela Popim Miqueloni

http://lattes.cnpq.br/4075651818255414

Celia Regina Paes Bueno, FCAV/UNESP

http://lattes.cnpq.br/6803396023102472

Antonio Sergio Ferraudo

http://lattes.cnpq.br/7159757610060958

Published

2012-11-09

How to Cite

Miqueloni, D. P., Bueno, C. R. P., & Ferraudo, A. S. (2012). Spatial analysis of universal soil loss equation factors of a watershed area relief. Pesquisa Agropecuaria Brasileira, 47(9), 1358–1367. https://doi.org/10.1590/S1678-3921.pab2012.v47.11120