Uso de técnicas de geoprocessamento na determinação das áreas de preservação permanente

Abstract

The techniques of geoprocessing and geotechnologies can be used in the determination of permanent preservation areas (PPA). The objectives of this work are the determinations of PPA the physical limits and the elaboration of thematic maps (Land Use, Letter Image, Classes of Slope, PPA and Conflict of Land Use) for the Farm Bertolini, “Sede 400”, (river) Rio Pardo-RS. The issue raised is in excess of PPA property compromising their technical and economic viability. The limit in area of the property (13.590,10 m – 818,53 ha) were obtained with the use of GPS, post-processing and corrections from the georreferenced Ikonos II image. The land use were identified in the image by visual interpretation, where the pasture is the bigger use (542,12 ha – 66,23%). The relief is plain (0-3% slope) for the most part, 608,35 ha, is not hills and areas with slope greater or equal to 45º. The PPA, 524,99 ha (312,92 ha of buffer and 212,07 ha of bathed), representing 64,14% of the property, obtained due to the presence of a network drainage, bathed, springs and water slides. It was also observed the use land conflict - pasture on PPA (518,46 ha, 98,76%), not fulfilling their function environment, and changes in the hydrography, by drainage channels seen in the image. Attempt the legal requirements the property will not be feasible, because the law does not allow direct economic exploration in PPA. This situation will only change with the alteration of the legislation. The techniques and materials used and the maps elaborated attempt the objectives.