Identification of areas with soil loss above the tolerable using NDVI for calculating the C factor of USLE


One of the main problems related to the conservation of the watershed soils is the hydric erosion of the soil, leading to particles transportation to water bodies as consequence, especially in those regions with agricultural activities. Therefore, this study main purpose was to demonstrate the factor c calculation methodology application, through the Normalized Difference Vegetation Index (NDVI) using geoprocessing techniques and mathematical modeling to quantify the soil loss in the Una River Basin, through the Universal Soil Loss Equation (USLE), it was possible to evaluate the different soil losses found according to thedifferent land uses and occupations. The results showed a low soil loss potential, which is a result of the association of different factors, in special, vegetation cover, which corresponds to 41% of the watershed area, and was also responsible for maintaining erosion rates lower than 10 t.ha-1.year-1 in 93,4% from the study area, while erosion rates higher than 10 t ha-1.year-1 werelocated within areas with agricultural activities and high steepness. The applied methods have proven to be efficient and highly contribute to river basins studies regarding the planning, management and soil conservation.

SILVA, Darllan Collins da Cunha e; ALBUQUERQUE FILHO, José Luiz; SALES, Jomil Costa Abreu; LOURENÇO, Roberto Wagner. Identificação de áreas com perda de solo acima do tolerável usando NDVI para o cálculo do fator C da USLE. Revista RAEGA, O Espaço Geográfico em Análise, v.42, p.72-85, dez., 2017.

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