CHUVA, ERODIBILIDADE, USO DAS TERRAS E EROSÃO HÍDRICA NA ALTA BACIA DO RIO ARAGUAIA

• Ano de defesa: 2007
• Autor(a) principal: SANTANA, Neiva Maria Pio de
• Orientador(a): CASTRO, Selma Simões de
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Goiás
• Programa de Pós-Graduação: Mestrado em Geografia
• Departamento: Ciências Humanas
• País: BR
• Palavras-chave em Português: precipitação pluvial; erodibilidade; uso e ocupação do solo; erosão hídrica.
• Palavras-chave em Inglês: Rainfall, erodibility, use and occupation of soil, erosion.
• Área do conhecimento CNPq: CNPQ::CIENCIAS HUMANAS::GEOGRAFIA
• Link de acesso: http://repositorio.bc.ufg.br/tede/handle/tde/1885

With intensive occupation of Central-West region of Brazil in the last decades having significant impact on natural resources and water erosion is one of the most serious problema. Higher catchment area of Araguaia river is representative of this process due to several factors such as: existence of sandy soils highly susceptible, inadequate use and management, higher annual rainfall which is concentrated in some months and higher erodibility. The objective of this study was to identify and characterize possible relations between precipitation dynamic and erosion, erodibility, soil use and incidence of erosion (gullies) with the point of view to furnish help to evaluate susceptibility and risk of erosion for environmental planing. Approach adopted in this study will help in principal analysis systematic or integrated geoenvironmental nature, based on correlation of integrated data, dynamic climatology and geographic, with emphasis on rainfall, considering influence on landscape and vice-versa and in the context of catchment hydrographic with special analyses reference. The results revealed that rainfall concentration in time (autumnsummer) and in space (sectors of emerging tributaries of Araguaia river and river itself), concentration of erosion in the east, central part and South, where also found higher incidence of erosion and erodibility (susceptible soils) and large area of native Cerrado converted to agriculture and pasture are degraded. It is also revealed that conserved areas (in the West0, inspite of higher erosivity and erodibility do not present erosion phenomenon and finally annual rainfall indices may be decreased since 1970.