SIG applied in the analysis of the conflict of soil use in permanent preservation areas in a watershed

Sérgio Campos, Muriel Cicatti Emanoeli Soares, Raquel Cavasini, Marina Granato, Monica Yuri Mashiki, Junia Ruggiero, Katiuscia Fernandes Moreira, Zacarias Xavier de Barros


The work sought to obtain the conflict of land use in areas of permanent preservation in the Ribeirão Descalvado watershed - Botucatu (SP), having as cartographic bases: the planialtimetric map (IBGE, 1969) used in the georeferencing and the satellite image of 2005. The SIG-IDRISI was used for conversion of the analogical information for digital and determination of the areas. The land use showed that the pastures occupy most of the area (68.18%) when analyzed the figures of 2005. The pastures are more than half of the area showing with that the predominance of soils of low fertility, besides the prevalence of the livestock in the area. The satellite image allowed the mapping of the soil use in a reliable way, and will be used for futures regional planning. The area is being environmentally preserved, since it is covered with almost 20% of forests (19.32%), minimum demanded by the Brazilian Forest Code effective (20%). The Kappa index obtained was 0.41, had as good according to the classification. The delimitation of the drainage net was made for the obtaining of the areas of PPAs and of conflict, which showed that only 60.93% are being busy appropriately for ripparian forest.


watershed; remote sensing; SIG-IDRISI; preserved area