CHUVA, ERODIBILIDADE, USO DAS TERRAS E EROSÃO HÍDRICA NA ALTA BACIA DO RIO ARAGUAIA / RAIN, ERODIBILITY, USE OF LAND AND WATER EROSION IN HIGH RIVER BASIN ARAGUAIA

AUTOR(ES)

Neiva Maria Pio de Santana

DATA DE PUBLICAÇÃO

2007

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.

ASSUNTO(S)

uso e ocupação do solo geografia erodibilidade rainfall, erodibility, use and occupation of soil, erosion. precipitação pluvial erosão hídrica.

Documentos Relacionados

• CHUVA, ERODIBILIDADE, USO DAS TERRAS E EROSÃO HÍDRICA NA ALTA BACIA DO RIO ARAGUAIA
• RAIN, ERODIBILITY, USE OF LAND AND WATER EROSION IN HIGH RIVER BASIN ARAGUAIA
• Chuvas, erosividade, erodibilidade, uso do solo e suas relações com focos erosivos lineares na alta bacia do rio Araguaia
• Alteração no uso e cobertura do solo na bacia do médio rio Araguaia, Brasil central
• Tipologia e fragmentação das terras úmidas do cerrado na alta bacia do Rio Araguaia, estado de Goiás