Detection of Deforestation within the Rio Verde Drainage, Sub-Basin of the Amazon, Using Multi-Temporal Analysis of Landsat Thematic Mapper and its Influence on the Hydrological Aspects of that Region
نویسندگان
چکیده
This paper summarizes the result of vegetation cover changes in Mato Grosso State in Amazonia, and changes on hydrological aspects of that region. The study area is the main soybean plantation area of Brazil along the Highway BR 163, in the Rio Verde Drainage. Using multi-temporal imageries of Landsat TM of the same area, alteration of vegetation cover was analyzed, performing unsupervised classification of NDVI images, together with visual interpretation. Evapotranspiration changes were also calculated using the rain gauge and discharge data of the related area. As a result, we concluded that the forest cover decreased from 76% in 1991 to 13% in 2009 and a slight decrease of evapotranspiration was also observed in the same area, in the last 30 years.
منابع مشابه
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