Utilização da geoinformação para estudos de supressão da mata ciliar do baixo curso do Rio Capivari-Ba

Abstract

The intensive use of natural resources without planning brings a lot of problems, that affects the hydric resources, the vegetation, the land and the biodiversity in the totality, besides damage the self human, that dependence directly of what the nature offers. The vegetation suppression along the years disarranged the natural landscapes, with damage for fauna, flora and the physique space, many of this caused by disobey of what the legislation determines. The Forest Code (Law no 4.471/65) determines like Permanent Preservation Areas (APP) the vegetation along the rivers, lakes, fountains, top of mounts and other areas, to protect the hydric resources, the land, the biodiversity and the landscape integrity. The use of geotechnologies, such geoprocessing and remote sensing, can be an important toll in the environmental monitoring, assistance the tooking of decisions. The Capivari river, tributary of Paraguaçu, along the years had his basin vegetation very modified, with suppression of most part of your riparian zone, caused by the wrong use of lands nearby it. So, this work had the objective evaluate the state of riparian zone in Capivari river in the cities of Cruz das Almas, Muritiba and São Félix. Firstly, was georeferenced the river course that will be studied, after from de SPOT satellite images, was applied the NDVI calculation in the softaware ENVI 4.5 to analyze the riparian zone state, also be generated the comprisement area that the riparian zone will be exist according the Forest Code, by the software Arcgis 9.3. Was taked also photos in the area for the proof .Was concluded that the natural landscape of the river was very modified, remaining jus some riparian zone fragments along the river course, what cause siltation in the river course and damages in the amount and quality of hydric resources.