Effects of forest roads and an assessment of their disturbance of the natural enviroment based on GIS spatial multi-criteria analysis: case study of the University Forest of Taxiarchis, Chalkidiki, Greece

Abstract

The forest road network contributes to all aspects of the management and protection of natural ecosystems, such as fire protection and access to settlements, infrastructure and forest recreation. This has led to a constant demand for new roads and increased road density in forest areas. However, due to the environmental impact of such roads, a tool that takes into account all the parameters that they affect and evaluates the spatial distribution of forest-road-induced disturbance is needed. The present research highlights a multi-criteria evaluation (MCE), based on a spatial approach that utilizes geographical information systems (GIS), for estimating both the impact of the forest road network and the absorptiveness of the natural environment for that impact. The University Forest of Taxiarchis, Greece, was selected as it combines both timber production and recreation characteristics. Primary data were collected through the management plan for the area and the road network was categorized. A variety of factors regarding forestry, wood extraction methods and production, and social and topographical criteria were examined and scored based on their weighting factors. The results regarding the impact and the absorptiveness were analyzed in order to assess the spatial disturbance. The analysis showed that the spatial environmental impact of the forest roads is crucial and that MCE methods should be applied in environmental impact assessment (EIA) in order to support decision-making systems (DMS) for new road construction and to enhance environmental integration.