SOIL QUALITY IN A WATERSHED AREA OF ILHA SOLTEIRA - SP

It is unquestionable the degradation of water sources due to erosion and pollution arising from economic development. In this sense this study aimed to characterize the physiography and some physical properties of the major soils of a watershed in the city of Ilha Solteira - Sao Paulo state, Brazil. High resolution satellite images of Quickbird 0.6 m and SPRING program version 4.3 were used. Using the methodology of topossequence for strand in 5 transects leased points towards the spigot to the mouth, collection of soil samples for particle size analysis, macroporosity, microporosity, total porosity were performed. It was conducted descriptive statistics. Representative soils from the watershed were studied: Hapludox Claysoil Red Yellow eutrophic. The Oxisol presented more degraded physical conditions taking into account the soil density as indicator of quality, whereas in Argisol this indicator performed better, the studied physical attributes variability were higher in Typic than in Red-Yellow Podzolic.