IVAS Sazonal para Cálculo do Fator C da RUSLE em Microbacia do Semiárido Brasileiro

Raul Gomes; Danielle Listo

doi:10.5433/2447-1747.2025v34n1p29

Authors

Raul Gomes Federal Rural University of Pernambuco https://orcid.org/0009-0005-8853-3948
Danielle Listo Federal Rural University of Pernambuco https://orcid.org/0000-0002-9391-1211

DOI:

https://doi.org/10.5433/2447-1747.2025v34n1p29%20

Keywords:

soil cover, soil erosion, vegetation index, RUSLE

Abstract

Unsustainable agricultural practices that disregard sustainable management predominantly result in negative consequences for environmental quality at various levels. Therefore, soil preservation in semiarid regions becomes essential due to both its high vulnerability to erosion and the seasonal variations and climate changes that characterize this dynamic environment. This study uses the Soil-Adjusted Vegetation Index (SAVI) as an alternative to the Land Use and Cover factor (C) in the Revised Universal Soil Loss Equation (RUSLE). The research seasonally evaluates the performance of SAVI and RUSLE in a Brazilian semiarid micro-watershed during rainy and dry seasons, generating four scenarios. Average soil loss ranged from 25 to 48 t/ha/year, with most areas showing low to moderate erosion, but high erosion in 12% to 22% of the studied area. The soil reflectance adjustment coefficient (L) varied, with L=1, adjusted for exposed soil, resulting in greater soil cover and less erosion, while L=0.5, adjusted for medium-sized vegetation, showed less cover and more erosion. The dry season presented higher soil losses compared to the rainy season, highlighting the importance of vegetation cover in mitigating erosion.

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Author Biographies

Raul Gomes, Federal Rural University of Pernambuco

Mestrando do Programa de Pós-Graduação em Ciências do Solo (UFRPE - Universidade Federal Rural de Pernambuco).

Danielle Listo, Federal Rural University of Pernambuco

Doutorado em Geografia pela Universidade Federal de Pernambuco (UFPE). Docente da Universidade Federal de Pernambuco (UFPE).

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