EFFECT OF SPATIAL-TEMPORAL VARIATION OF LAND USE AND LAND COVER ON SOIL EROSION

Guilherme Henrique Expedito Lense; Taya Cristo Parreiras; Rodrigo Santos Moreira; Junior Cesar Avanzi; Ronaldo Luiz Mincato

doi:10.1590/1983-21252021v34n110rc

Authors

Guilherme Henrique Expedito Lense Graduate Program in Environmental Sciences, Universidade Federal de Alfenas, Alfenas, MG, Brazil https://orcid.org/0000-0002-3560-9241
Taya Cristo Parreiras Graduate Program in Environmental Sciences, Universidade Federal de Alfenas, Alfenas, MG, Brazil https://orcid.org/0000-0003-2621-7745
Rodrigo Santos Moreira Graduate Program in Environmental Sciences, Universidade Federal de Alfenas, Alfenas, MG, Brazil https://orcid.org/0000-0001-7443-9428
Junior Cesar Avanzi Department of Soil Science, Universidade Federal de Lavras, Lavras, MG https://orcid.org/0000-0003-2455-0325
Ronaldo Luiz Mincato Institute of Natural Sciences, Universidade Federal de Alfenas, Alfenas, MG https://orcid.org/0000-0001-8127-0325

DOI:

https://doi.org/10.1590/1983-21252021v34n110rc

Keywords:

Soil conservation. Modelling. Erosion Potential Method.

Abstract

Land use and land cover changes are the main factors of human influence on the erosive process. Thus, this work aimed to evaluate the effect of land use and land cover changes over 30 years on water erosion in a tropical subbasin in southeastern Brazil. The hypothesis was tested that the expansion of coffee and reforestation areas decreased soil losses due to water erosion. The Potential Erosion Method (EPM) was used to estimate water erosion in 1988, 1998, 2008 and 2018. In the first two decades, the predominant land use in the subbasin was corn, while in 2008 and 2018, coffee and reforestation areas became the main land use class in the area. The acquisition of EPM input parameters and data analysis was performed using remote sensing techniques and the Geographic Information System. Between 1988 and 1998, the total soil loss increased by 50.36 Mg year^-1 due to the conversion of pasturelands to coffee plantations and the increase of deforestation. However, between 1998 and 2018, there was a soil loss reduction of 660.21 Mg year^-1 (-37.46%), once the conversion of pasture and corn areas to coffee with the adoption of conservation practices, and the expansion of reforestation areas among 1988 - 2018, contributed to the decrease of soil erosion rates.

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