A Expansão da Cultura de Eucalipto na Região do Vale do Paraíba entre 1995 e 2010 e sua Relação com as Características Hidrológicas da Bacia.

This paper is a temporal analysis of the silviculture in “Vale do Paraíba Paulista” - one of the most industrialised regions of Brazil, where large patches of “Mata Atlântica” are found - and its consequences to the local watershed. Initially, we obtained LANDSAT 5 images from 1995 and 2010. Once selected, the images were processed and classified using the Geographic Information System - SPRING. The images were divided into three major classes, using NDVI (Normalized Difference Vegetation Index), non-forest, forest and transition, in order to facilitate the classification. Once the images have been edited and remapped, we obtained land use and land cover maps – 1995 e 2010. After that, Digital Elevation Models were generated with the TerraHydro software, in this, three classes were obtained: Lowlands, Hillsides and Hilltops. With ArcMap, intersections between silviculture areas and Digital Elevation classes obtained with TerraHydro were done. Then, we examined data from the IBGE Agricultural Census, with the data obtained by classifying land use and land cover. There was an increase in the area covered by silvicultures by the order of 42 thousand hectares to more than 60 thousand. The planting on hilltops increased from 25% to 27% and silviculture in hillsides remained with 47% of the total, while planting in lowland areas has reduced proportionately (2%).