Brazil is a big country with richness water supplies, and we have been getting big demand about them. So it is unquestionable the development of sustainable techniques to aim a properly water quality and continuous supply. To gain them it is necessary understand the interaction between vegetation cover and water behavior inside the soil. It is an actual and important environmental issue, so this paperwork brings a briefly analysis that is going to help further management efforts in water resources' maintenance and preservation. Palavras-chave: remote sensing, normalized difference vegetation index, soil saturation index, numeric model, multitemporal analysis, sensoriamento remoto, modelo numérico, índice de saturação do solo, índice de vegetação normalizada , análise multitemporal. 1 Consumo significativo de água 9 4 3 artigo anterior 9