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DocumentPerformance of inclined self-tapping screw: Effect of the thin wood part in inclined screw connection on shear and withdrawal resistance
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.The aim of this study was to investigate the effect of thin wood part on the load-carrying capacity of inclined self-tapping screw. Two components of load-carrying capacity (withdrawal and shear capacity) were tested to examine the effect of thin wood part. Combined load-carrying capacity of inclined screw loaded upward was also tested and compared with the prediction value from EN 1995-1-1. Screws were installed in Glued-laminated timber (GLT) and two different dimensions of screws (Ø8.0 × 100 mm, Ø6.5 × 65 mm) were selected. As a result, thin wood part affected relatively little on the withdrawal capacity, compared to the shear capacity. EN showed conservative result in combined load-carrying capacity, even though shear capacity of inclined screw declined due to thin wood part. Keywords: Climate change ID: 3622020 -
ArticleMissing the food from the woods: the case of Soliga tribes of Western Ghats, India
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.Forest dependent indigenous communities have traditionally fulfilled their dietary requirements from a range of locally available food resources. For Soliga tribes of Biligirirangana Hills (BR Hills) in India’s Western Ghats, gathering of wild berries, tubers and mushrooms, shifting cultivation of millets, legumes and vegetables within the forests and small game hunting have habitually supported food and subsistence needs. Over the years, the traditional food practices have transformed drastically, driven by conservation policies that resulted in the resettlement of Soligas to forest peripheries, a ban on traditional fire practices and consequent colonization of forests by invasive species, altering the forest composition and leading to decline of wild food resources. We trace the trajectory of changes in Soliga food systems using a combination of methodologies ranging from a comprehensive literature review and expert interviews to household surveys in three Soliga settlements in BR Hills. Our study reveals the diminishing importance of forests as source of food and income and shift from food crops to cash crops in farms in forest peripheries to avert crop raids by wildlife. Dependence on forest produce collection and farming was found to vary based on the allocation of tribal land rights and the location of the settlements with respect to the forest type and availability of markets. While existing literature and expert respondents recognize the changing forest dynamics and the immense ecological knowledge of Soligas that complements forest conservation efforts, the nexus between forests, farming and health and nutrition of the tribe was hardly appreciated. Improved access to public food distribution system and evolving cultural preferences has increased the dependence on external markets for food. We further discuss the repercussions of these transitions on nutritional security and food sovereignty of the community. Keywords: Food systems, Human health and well-being, Biodiversity conservation, Agriculture, Sustainable Forest management ID: 3483228 -
DocumentEvaluation of carbon stocks of domestic wood products to improve carbon sinks in the forest sector
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.Harvested Wood Products (HWP) is recognized as a carbon pool in the forest sector, along with biomass, dead wood, litter and soil. There was a debate about which country should include carbon stocks in imported or exported HWP. At the 17th Conference of the Parties in Durban (COP17) in 2011, domestic harvested wood products were accepted as accounted carbon pools and thus have to be reported by all Parties included in Annex I. Although the HWP carbon calculation method related to this has been suggested since the IPCC 2006 guidelines, it could not be calculated due to the lack of HWP statistics data in Korea.
In this study, to estimate the carbon stock and the annual stock changes for each of the HWP categories. Input data on the production of wood products used in the model to estimate carbon emissions and removals from HWP in Korea were acquired from database of the 'Wood utilization survey report' and 'Statistical yearbook of Forestry' in Korea Forest Service. In particular, statistic data on production of sawnwood, wood-based panels and paper and paperboard were obtained for the period 1989–2019. It used the first order decay function with default half-lives of 35, 25 and two years, respectively. For the conversion of wood volume or weight into carbon the default conversion factors and half-lives provided by IPCC guideline. As a result of the calculation, it was estimated that about 0.7 million tCO2 was stored according to the use of domestic wood products in 2019. It is expected that it will be possible to quantify the carbon storage effect of HWP and to activate the use of wood products. Indeed, it could change if life expectancy of HWPs improves into the future. Furthermore, additional mitigation potential may be achieved when substituting emissions-intensive materials. Keywords: Sustainable forest management, Climate change, Value chain ID: 3619351
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