Planejamento da rede de estradas, pátios e trilhas de arraste em manejo de floresta nativa utilizando SIG

Abstract

The objective of the work was to plan the network of roads, patios and drag trails in the management of native forest using geographic information systems (GIS) considering the integration of the hydrology of the area, the slope of the land and the distribution of commercial trees by category. The calculation of the optimal density of secondary roads (DOE) was made based on the cost of dragging and on the cost of roads and patios. Subsequently, the allocation of secondary roads was carried out from the primary road, allocation of courtyards and finally allocation of primary trails and secondary trails. According to DOE calculations, the spacing of 500 m (20 m/ha) between roads and the spacing of 250 m between patios presented the lowest total cost. When compared to a plan approved by SEMA having 400 m (25 m/ha) between roads and 500 m between yards, the density of roads decreased by 5 m/ha, even with the increase in the number of yards from 18 to 26, the area total infrastructure was practically the same at 1,6%. The skidding productivity increased by 8,47 m³/h due to the reduction of the skidding distance by 103,48 m and the total cost was reduced by R$ 2,37/m³.