CHUVA, ERODIBILIDADE, USO DAS TERRAS E EROSÃO HÍDRICA NA ALTA BACIA DO RIO ARAGUAIA
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Data
2007-05-04
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Universidade Federal de Goiás
Resumo
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.
Descrição
Citação
SANTANA, Neiva Maria Pio de. RAIN, ERODIBILITY, USE OF LAND AND WATER EROSION IN
HIGH RIVER BASIN ARAGUAIA. 2007. 162 f. Dissertação (Mestrado em Ciências Humanas) - Universidade Federal de Goiás, Goiânia, 2007.