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Gewählte Master / Diploma Thesis:

Master / Diploma Thesis - Institut für Forsttechnik (FT), BOKU-Universität für Bodenkultur, pp 91. UB BOKU obvsg FullText

Data Source: ZID Abstracts
The aim of this work is to calculate the environmental impacts of supplying one cubic meter of wood in mountain forests, from the forest stand to the road. It includes the processes felling, extracting and processing (delimbing, cross-cutting). By modelling different scenarios, a comparative life cycle assessment (LCA) of timber harvesting systems on steep terrain using chainsaw, cable-harvester, tower yarder and cable-forwarder is designed. Using primary data (from existing studies) and the Ecoinvent database (version 3.4), five different timber supply chains were modelled with the openLCA software (version 1.7). The input data of the investigated scenarios varied in terms of extraction distance, slope and tree volume. For this purpose, the impact categories global warming potential (GWP100), human toxicity, fossil depletion, particulate matter formation, photochemical oxidant formation, terrestrial acidification and terrestrial ecotoxicity were calculated using the method package ReCiPe2016 Midpoint (H). For the individual scenarios and the different wood harvesting systems, the GWP(100) for the supply of one cubic meter of wood to the forest road is between 4.3 and 27.9 kg CO2 eq. m^-3. The environmental impact of harvesting systems depends above all on productivity and fuel consumption. An increase of the extraction distance or the slope had a negative effect on the different impact categories. Motormanual felling and processing and extraction with cable-forwarder (cut to length) is in most scenarios the most environmentally friendly harvesting system. But with increasing extraction distance, the ground-based systems perform worse, compared to tower yarders. From an ecological point of view, in mountain forests, felling and processing with chainsaw is more suitable than with cable-harvester.

Beurteilende(r): Stampfer Karl
1.Mitwirkender: Kühmaier Martin

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