Alocações de estrada primária para plano de manejo florestal, comparando diferentes modelos digitais de elevação

Abstract

Forestry planning is critical to managing a forest and ensuring that the expected results are achieved. With this, the use of digital elevation models has been increasing in the decision support of road projections more effective within the handling. This work aims to apply the optimized route calculation in primary road planning in a forest management area, using the comparison between orbital radar images (SRTM, ASTER and TOPODATA) for calculations of the criteria related to the relief. The data were processed in ArcGIS 10.1 and replicated to the three digital elevation models, in two steps: geographic analysis, by which it generated information on the cost factors of the relief (soil occupation, shading and slope) and optimization, in which Carried out the calculations to define the path of least cost for primary roads, according to the area of viability of total costs. As results, the route of the lowest cost path was obtained, considering the optimization criteria the SRTM model. When comparing the results between the models, the ASTER presented underestimated values in places with elevated altitude, whereas TOPODATA, due to the superficiality of the results, is not recommended for relief studies. It was concluded that the applied methodology presented a satisfactory result in relation to the optimization of primary road costs in a forest management area, using the SRTM model.