potencial de erosão da bacia do rio uberaba potential of erosion in uberaba river watershed

Clicks: 234
ID: 221031
2010
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Abstract
Este trabalho teve por objetivo identificar qualitativamente as áreas suscetíveis à erosão laminar na bacia do Rio Uberaba, localizada em Uberaba -MG, apoiado no modelo matemático da Equação Universal de Perda de Solo (EUPS). Foram utilizadas cartas de: solos, uso e ocupação das terras, redes de drenagem, declividade e dados pluviográficos, utilizando-se de um Sistema de Informação Geográfica (SIG -IDRISI). A espacialização do potencial de erosão só foi possível a partir da estimativa da tolerância às perdas laminares para cada tipo de solo da bacia, e da profundidade dos solos, por entender que as perdas são mais significativas em solos mais rasos do que em solos muito profundos. Na análise dos resultados, verificou-se que 37% da área total da bacia do Rio Uberaba (905,24 km²) sofrem perdas de solos acima do limite de tolerância, sendo 12% em solos profundos e 25% em muito profundos, e a espacialização deste evento favorece a adoção de ações efetivas quanto à conservação dos solos da bacia.
This work aimed to identify qualitatively the areas susceptive to laminar erosion in Uberaba river watershed, located in Uberaba-MG, Brazil, based on the mathematical model of the Universal Soil Loss Equation (USLE). The following maps had been used: soil, land use, drainage net, slope and rainfall data, using a Geographic Information System (GIS - IDRISI) to analyze and manage the data that are linked to the location. The spatiality of the potential of erosion was possible from the estimative of the tolerance to laminar losses for each kind of soil in the watershed and soil depth, to understand that the losses are more significant in flatter soil than in very deep ones. In the analysis of the results, it was verified that 37% of the total area of the watershed of the Uberaba river (905,24 km²) showed losses above the tolerance limit, being 12% in deep soil and 25% in very deeply ones, and the spatiality of this event, regards to effective the actions due to soil conservation of the watershed.
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Authors ;Renato F. do Valle Júnior;João A. Galbiatti;Marcílio V. Martins Filho;Teresa C. T. Pissarra
Journal bioorganic and medicinal chemistry letters
Year 2010
DOI
10.1590/S0100-69162010000500012
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162010000500012
Keywords
erosion usle

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