Diagnosis of the permanent preservation areas in the watersheds of municipal district of Bandeirantes, Paraná, Brazil

Abstract

The expansion of the agricultural limits, the industrial development and the increase of populations indexes demanded substantial increases in the production of victuals. These factors took to the growing degradation of the natural resources. The devastation of the areas of forests along the rivers and streams, around the riverhead and tops of hills, in the past, they force its recomposition, for law force, as permanent preservation areas (PPA’s). This work had for objective to define the watersheds of the municipal district of Bandeirantes – PR, Brazil, to measure the permanent preservation areas, total and existent, along the courses of water, riverhead and top of hills and to identify the conflict use of the soil in these areas. The geographical information system was used SPRING 4.1, image of Landsat ETM+, bands 2, 3, 4 and 5, cartographic base of the IBGE, scale 1:50000 and aerial pictures, scale 1:25000. It was verified that the municipal district presents 8,6% of PPA’s with ciliary forest, being 11,38%, referring 8,21% and 5,25% to rivers, streams and riverhead, respectively. Referring PPA’s meets of top of hills and in superiors slopes at 100%, they have equivalent area for 24,94 ha and 8,7 ha, however 100% of these areas are without forest. The watersheds that presented smaller index of PPA’s was those with better agricultural aptitude.