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Inventory

(30)
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2009/17–2018/26
(15)
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2004/06–2009/17
(15)
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1993/95–2004/06

Topic

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Stemwood volume of all trees and shrubs with a diameter at breast height (dbh) ≥12 cm with bark that were not removed from the forest as part of silvicultural planning, but because they had been damaged (e.g. by windthrow, avalanches, insects or rockfall). The variable is derived at the sample plot level from the harvested tally trees and the proportion of sanitary/salvage fellings (according to information provided by the foresters).
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Classification

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Main reason for sanitary/salvage felling. Reference: Forest Service Survey (MID 345: Ursache der Zwangsnutzung)
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region

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Demarcation of Switzerland into five regions (Jura, Plateau, Pre-Alps, Alps and Southern Alps) with relatively uniform growth and timber production conditions. The production regions were established by the Federal Office of Forestry long before the first National Forest Inventory (NFI1, 1983-1985). With a small exception along Lake Geneva, the boundaries of the production regions still follow the municipal boundaries of the time. Unlike the NFI, the Forestry Statistics of the Federal Statistical Office don't use the production regions as demarcation but rather the forestry zones, whose boundaries are somewhat different.
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Division of Switzerland into 14 regions (2 in the Jura, 3 on the Plateau, 3 in the Pre-Alps, 5 in the Alps and 1 in the Southern Alps). The economic regions are a subdivision of the production regions according to economic-geographical criteria.
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Demarcation of Switzerland used in NFI for protection forest analyses. The six protection forest regions were derived from the economic regions by combining individual regions according to natural and statistical criteria.
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Regional demarcation with the cantons as a unit, with the two half-cantons, Basel-Land and Basel-Stadt, combined into one canton for statistical reasons.
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Demarcation of Switzerland into six regions with similar flora and fauna. The six regions correspond to the basic categories in the publication «The Biogeographical Regions of Switzerland», which was published by FOEN in 2022.

evaluation area

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Area designated in the five Inventories NFI1 (1983-1985), NFI2 (1993-1995), NFI3 (2004-2006), NFI4 (2009-2017) and NFI5 (2018-2026) as «accessible forest without shrub forest», a.f.w.s.f. i.e. «forest without shrub forest» that can be accessed on foot and is situated in a forest that the cantons designated «protection forest» in 2022 according to the harmonised criteria of SilvaProtect-CH (Losey & Wehrli 2013).
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Area designated in both NFI4 (2009-2017) and NFI5 (2018-2026) as «accessible forest without shrub forest», a.f.w.s.f. i.e. «forest without shrub forest» that can be accessed on foot and is situated in a forest that the cantons designated «protection forest» in 2022 according to the harmonised criteria of SilvaProtect-CH (Losey & Wehrli 2013).

grid

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Sub-grids 1, 2, 3, 4 and 5 of the field surveys on the sampling grid with a mesh size of 1.4 km (base grid).
search result: 60 entries on 4 pages
LFI4–LFI5 2009/17–2018/26
production region
sanitary/salvage fellings
reason for sanitary/salvage felling (forest area classifier)·protection forest (2022)
protection forests (2022): a.f.w.s.f. NFI1 to NFI5
1.4 km grid, subgrids 1-5
column total, %/year
m³/ha/year
1000 m³/year
LFI4–LFI5 2009/17–2018/26
production region
sanitary/salvage fellings
reason for sanitary/salvage felling (forest area classifier)·protection forest (2022)
protection forests (2022): a.f.w.s.f. NFI4/NFI5
1.4 km grid, subgrids 1-5
column total, %/year
m³/ha/year
1000 m³/year
LFI4–LFI5 2009/17–2018/26
economic region
sanitary/salvage fellings
reason for sanitary/salvage felling (forest area classifier)·protection forest (2022)
protection forests (2022): a.f.w.s.f. NFI1 to NFI5
1.4 km grid, subgrids 1-5
column total, %/year
m³/ha/year
1000 m³/year
LFI4–LFI5 2009/17–2018/26
economic region
sanitary/salvage fellings
reason for sanitary/salvage felling (forest area classifier)·protection forest (2022)
protection forests (2022): a.f.w.s.f. NFI4/NFI5
1.4 km grid, subgrids 1-5
column total, %/year
m³/ha/year
1000 m³/year
LFI4–LFI5 2009/17–2018/26
protection forest region
sanitary/salvage fellings
reason for sanitary/salvage felling (forest area classifier)·protection forest (2022)
protection forests (2022): a.f.w.s.f. NFI1 to NFI5
1.4 km grid, subgrids 1-5
column total, %/year
m³/ha/year
1000 m³/year
LFI4–LFI5 2009/17–2018/26
protection forest region
sanitary/salvage fellings
reason for sanitary/salvage felling (forest area classifier)·protection forest (2022)
protection forests (2022): a.f.w.s.f. NFI4/NFI5
1.4 km grid, subgrids 1-5
column total, %/year
m³/ha/year
1000 m³/year
search result: 60 entries on 4 pages

Citation

Abegg, M.; Ahles, P.; Allgaier Leuch, B.; Cioldi, F.; Didion, M.; Düggelin, C.; Fischer, C.; Herold, A.; Meile, R.; Rohner, B.; Rösler, E.; Speich, S.; Temperli, C.; Traub, B.,
2023: Swiss national forest inventory NFI. Result tables and maps of the NFI surveys 1983–2022 (NFI1, NFI2, NFI3, NFI4, NFI5.1–5) on the internet. [Published online 30.05.2023] Available from the World Wide Web <http://www.lfi.ch/resultate/> . Birmensdorf, Swiss Federal Research Institute WSL