MAPPING SOIL EROSION VULNERABILITY USING REMOTE SENSING AND GIS: A CASE STUDY OF MAMUABA WATERSHED, PARAÍBA STATE

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Ana Paula Campos Xavier
Richarde Marques da Silva
Alexandro Medeiros Silva
Celso Augusto Guimarães Santos

Resumo

Soil erosion is one of the most significant environmental degradation processes. Mapping and assessment of soil erosion vulnerability is an important tool for planning and management of the natural resources. The objective of the present study was to apply the Universal Soil Loss Equation (USLE) using GIS tools to the Mamuaba watershed, southern Paraíba, for assess soil erosion vulnerability. An annual rainfall erosivity map was derived from the geographical model adjusted for northeastern Brazil, calculating an annual value for each pixel. The factors of soil erodibility (K), the topography (LS), and land use and management (C) were obtained in a GIS environment from soil type maps, digital elevation model (DEM) developed for the basin. The maps of the factors were combined to create the soil erosion vulnerability due to the water erosion. The results showed that, in general, the soils of the Mamuaba watershed present 54.54% of area with values between 0 and 10 t ha-1 year-1, which could be classified as "Slight to Moderate" to "Moderate" vulnerability in 1989, and 51.53% of the area in 2013. In the upper region of Mamuaba basin, the predominant classes were "Very High" and "Extremely High". High values of soil losses were predominance in regions of Red-Yellow Acrisol covered by pasture. Furthermore, the integration of USLE/GIS showed to be an efficient tool for the erosion prediction in this important basin of the Paraíba State.

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XAVIER, A. P. C.; DA SILVA, R. M.; SILVA, A. M.; SANTOS, C. A. G. MAPPING SOIL EROSION VULNERABILITY USING REMOTE SENSING AND GIS: A CASE STUDY OF MAMUABA WATERSHED, PARAÍBA STATE. Revista Brasileira de Cartografia, [S. l.], v. 68, n. 9, 2017. DOI: 10.14393/rbcv68n9-44436. Disponível em: https://seer.ufu.br/index.php/revistabrasileiracartografia/article/view/44436. Acesso em: 6 dez. 2022.
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Biografia do Autor

Ana Paula Campos Xavier, Programa de Pós-Graduação em Engenharia Civil e Ambiental/Centro de Tecnologia/Universidade Federal da Paraíba

Engenheira Ambiental. Bolsista de Mestrado na CAPES

Richarde Marques da Silva, Departamento de Geociências/CCEN/UFPB

Bolsista de Produtividade do CNPq. Geógrafo. Doutor em Engenharia Civil. Professor Adjunto III da Área de Cartografia. Centro de Ciências Exatas e da Natureza. Universidade Federal da Paraíba

Alexandro Medeiros Silva, Programa de Pós-Graduação em Geografia/Centro de Ciências Exatas e da Natureza/Universidade Federal da Paraíba

Geógrafo. Bolsista de Mestrado na CAPES

Celso Augusto Guimarães Santos, Departamento de Engenharia Civil/CT/UFPB

Bolsista de Produtividade do CNPq. Engenheiro Civil. Doutor em Engenharia Civil. Professor Associado II da Área de Geotecnia.