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NFI4b

forest area: rockfall SilvaProtect, modelled and assigned · time of last treatment (classes of 10 years) · protection forest region
unit: %
unit of evaluation: accessible forest excluding shrub forest NFI3/NFI4 combined
grid:
state 2009/13
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern AlpsSwitzerland
rockfall SilvaProtect, modelled and assignedtime of last treatment (classes of 10 years) %± %± %± %± %± %± %±
inside perimeterless than 10 years ago49.915.827.810.634.89.924.98.822.213.912.65.925.94.1
11-20 years ago20.112.75.65.421.78.612.56.711.110.59.45.212.93.1
21-30 years ago..27.810.613.07.0..11.110.53.13.18.72.6
31-40 years ago..5.65.413.07.04.24.111.110.56.24.36.92.3
41-50 years ago....4.34.312.76.911.110.56.24.36.02.2
over 50 years ago30.014.533.311.113.07.045.710.233.315.762.48.639.74.5
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterless than 10 years ago65.71.440.92.137.52.622.12.422.82.19.81.542.30.8
11-20 years ago18.71.122.51.822.32.214.62.120.22.07.11.318.20.7
21-30 years ago6.80.711.31.411.31.79.51.716.01.99.71.59.80.5
31-40 years ago3.70.56.91.17.81.46.81.511.71.68.11.46.50.4
41-50 years ago2.30.46.41.05.11.29.21.76.31.26.51.34.90.4
over 50 years ago2.90.511.91.416.02.037.72.822.92.158.72.518.20.6
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totalless than 10 years ago65.51.440.52.137.32.522.32.322.82.110.01.541.70.8
11-20 years ago18.71.121.91.722.22.214.52.020.02.07.31.318.00.7
21-30 years ago6.70.711.91.411.41.78.81.615.91.89.21.49.80.5
31-40 years ago3.70.56.91.18.11.46.61.411.71.68.01.36.50.4
41-50 years ago2.30.46.21.05.11.19.51.66.41.26.51.25.00.4
over 50 years ago3.10.512.61.415.91.938.32.723.22.159.02.419.00.6
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.

calculated by unit of reference: protection forest region

© WSL, Swiss National Forest Inventory, 03.11.2014 #164907/151289
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