Geoprocessamento aplicado na determinação das classes de declive e de uso e ocupação das terras da microbacia do Arroio Ajuricaba – Marechal Cândido Rondon-PR

Abstract

The slope classes and land uses and occupations constitute essential information for environmental planning since they help solving problems caused by intensive activities such as agriculture and livestock in areas of analysis. The objective of this study is to determine the slope classes and land uses and occupations of a watershed through Geographical Information System. For that reason, we used a digital cartographic base (scale 1:50000) and a cutting of scene of images Landsat 7-ETM+, both based on georeferential in the system UTM-SAD 69. The slope classes were obtained from the Land Numeric Model, elaborated through GIS, being used altimetric datas. The classes of land uses and occupations were determined by the supervised classification of the image Landsat 7-ETM+

, using GIS - Idrisi Kilimanjaro 14.01. The results show that in the area a soft relief prevails the moderate wavy (80,41% of the area); concerning the use and occupation classes, the predominant lands are of exposed soil (recently planted) and of annual cultivation representing 41,00% and 35,42%, respectively. The results have concluded that the relief is quite favorable to the agricultural activities and that GIS made possible the construction of a database that can be for used for decision making in the search of solutions of the problems and conflicts occurring in the watershed.