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NFI4
forest area
rockfall SilvaProtect · basal area (standing live trees)
unit of reference: protection forest region
unit: 1000 ha
unit of evaluation: accessible forest without shrub forest
grid: 1.4 x 1.4 km grid
state2009/17
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern Alps Switzerland
rockfall SilvaProtectbasal area (standing live trees)1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %
n/ato 19 m2/ha112.7336.9719.31026.5831.0721.99248.42
20-39 m2/ha160.0328.4819.3109.71421.5911.413250.32
40-59 m2/ha77.4420.6914.9113.02512.3123.225131.54
from 60 m2/ha19.11012.9128.7141.0444.6211.04547.26
total369.3198.8462.2540.2669.5437.57677.51
inside perimeterto 19 m2/ha1.0451.0452.0313.4241.6353.62312.713
20-39 m2/ha1.9321.6352.4291.9311.7334.62114.212
40-59 m2/ha0.8501.4382.3291.2410.6582.0318.315
from 60 m2/ha0.21000.4711.1410.8500.4710.8503.723
total3.9224.5217.9157.2164.42111.01338.97
outside perimeterto 19 m2/ha11.61325.8814.31120.7919.7936.47128.54
20-39 m2/ha26.0839.4623.4830.0732.2745.36196.23
40-59 m2/ha14.41227.2817.21015.61020.1921.59116.04
from 60 m2/ha2.82713.0129.3147.4155.8186.51744.86
total54.76105.4364.2473.7377.84109.73485.51
totalto 19 m2/ha125.3363.7535.7650.6552.3562.05389.62
20-39 m2/ha188.0269.4445.1641.6655.4561.35460.82
40-59 m2/ha92.6449.3534.4619.8833.0726.78255.82
from 60 m2/ha22.0926.4819.199.11310.8138.31595.74
total427.91208.71134.32121.12151.62158.321201.91
© WSL, Swiss National Forest Inventory, 18.06.2020 #861345/327676
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