Modelagem de perda de solo por erosão laminar em cenários pré e pós cadastro ambiental rural no município de Mineiros-GO

Abstract

The main goal of this work was to evaluate soil loss by laminar erosion considering Pre and Post Rural Environmental Registry (CAR – Cadastro Ambiental Rural) scenarios using the Universal Soil Loss Equation (USLE) modelling. The Pre-CAR scenario considers the current land use and land cover for the year 2018 and the future scenario, Post- CAR, in which the areas designated for permanent preservation areas and legal reserve were covered by native vegetation. Study area was Mineiros city, located in the southwest of the Goiás state (Brazil). Data on soil classes, land use and land cover, precipitation, digital elevation model and declared CAR data were obtained for modelling and the weights used were obtained by literature review in the context of the study area. Results indicate agricultural and pasture covers located on medium to sandy textured soils have higher soil loss. In a Post-CAR scenario, permanent preservation areas, areas of restricted use and legal reserves can contribute with a reduction of around 10% of the estimated soil loss by laminar erosion in the study area.