Estimativa de perda de solo usando o modelo Rusle e tecnologia geoespacial no complexo subterrâneo de Akure, sudoeste da Nigéria
DOI:
https://doi.org/10.5935/jetia.v9i42.877Resumo
A estimativa da perda de solo foi realizada utilizando o modelo revisado da equação universal de perda de solo (RUSLE) e a tecnologia geoespacial no complexo de embasamento de Akure, no sudoeste da Nigéria. Os objectivos são prever a taxa média anual de erosão do solo e abordar a ameaça de erosão na área. Geologicamente, a área é sustentada pelas rochas complexas do embasamento do sudoeste da Nigéria. Dados meteorológicos, informações de solo, dados de sensoriamento remoto e modelo digital de elevação (DEM) formaram a base de dados. Três imagens Landsat da área de estudo abrangendo 1987, 1997 e 2017, com resolução espacial de 30 m, foram implantadas usando a ferramenta de análise espacial ArcGIS. Os parâmetros RUSLE; O Fator de Erosividade da Chuva, o Fator de Comprimento e Declividade da Encosta, o Fator de Erodibilidade do Solo, o Fator de Cobertura e Manejo e o Fator de Prática de Apoio foram avaliados em ambiente de SIG (Sistema de Informações Geográficas). A perda de solo foi classificada em nível de severidade baixo, moderado, alto e muito alto. Os resultados mostraram que a erosão do solo aumentou moderadamente devido aos efeitos antrópicos ao longo dos anos.
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