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Título: Vulnerabilidade ambiental à erosão hídrica em uma sub-bacia hidrográfica pelo processo analítico hierárquico
Título(s) alternativo(s): Environmental vulnerability to water erosion in a hydrographic sub-basin by analytic hierarchy process
Palavras-chave: Erosão hídrica
Fragilidade ambiental
Uso do solo
Bacia hidrográfica do Rio Grande
Water erosion
Environmental fragility
Land use
Rio Grande hydrographic basin
Data do documento: 2016
Editor: Universidade Federal de Pernambuco
Citação: RIBEIRO, A. dos S. et al. Vulnerabilidade ambiental à erosão hídrica em uma sub-bacia hidrográfica pelo processo analítico hierárquico. Revista Brasileira de Geografia Física, [S.l.], v. 9, n. 1, 2016.
Resumo: Water erosion is one of the greatest causes of deterioration of soils worldwide. In Brazil, erosion causes loss of productivity, advance of the agricultural frontier, silting and contamination of water bodies and biodiversity loss. Therefore, to contribute to environmental planning and land management, the environmental vulnerability to water erosion of the Mandu river hydrographic sub-basin, southern Minas Gerais State, was evaluated by empirical analysis of the fragility of natural and anthropogenic environments. Landscape components taken into consideration were: land use, relief, soils, geology and climate, in descending order of priority by the Analytical Hierarchy Process (AHP). It was verified that the land uses are appropriate in 32.72% and inadequate in 67.28% in the area. More specifically, in 17.68% there is strong propensity to water erosion and in 0.08% of the site direct impacts of these processes are irreversible. So, the adoption of appropriate management techniques for pastures, the eradication of exposed soil and the rearrangement of coffee production sites and temporary agriculture would diminish the environmental impacts.
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