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NFI4
forest area
rockfall SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: protection forest region
unit: %
unit of evaluation: accessible forest
grid: 1.4 x 1.4 km grid
state2009/17
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern Alps Switzerland
rockfall SilvaProtecttime of last treatment (classes of 10 years) %± %± %± %± %± %± %±
n/an/a0.10.10.0.0.0.0.0.0.0.0.0.0.10.0
less than 10 years ago67.31.138.52.230.32.417.92.518.81.910.11.946.60.8
11-20 years ago17.90.920.61.820.12.19.81.914.41.77.71.716.90.6
21-30 years ago6.60.610.31.313.61.87.71.813.71.69.91.99.00.5
31-40 years ago3.50.46.81.18.51.513.52.39.41.416.92.46.80.4
41-50 years ago2.00.36.91.14.71.110.82.08.01.310.92.04.80.4
over 50 years ago2.60.416.91.622.82.240.33.235.82.344.63.115.90.6
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimetern/a0.0.0.0.0.0.0.0.0.0.0.0.0.0.
less than 10 years ago40.511.026.59.343.47.928.17.218.58.310.74.126.13.1
11-20 years ago15.18.013.97.516.55.77.74.38.55.85.63.110.42.2
21-30 years ago10.36.922.28.89.94.72.52.513.37.23.42.48.52.0
31-40 years ago0.0.5.04.89.64.613.65.713.17.06.83.38.52.0
41-50 years ago9.76.60.0.5.03.58.14.512.56.88.73.77.41.8
over 50 years ago24.49.532.410.015.55.840.08.034.09.864.86.439.03.5
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimetern/a0.0.0.0.0.0.0.0.0.0.0.0.0.0.
less than 10 years ago51.93.043.32.237.02.721.82.122.02.110.81.329.20.9
11-20 years ago19.42.420.71.823.72.413.51.820.72.05.91.016.40.7
21-30 years ago8.71.711.61.411.11.710.21.616.51.97.91.110.90.6
31-40 years ago7.01.66.31.17.41.47.21.311.51.68.61.28.00.5
41-50 years ago2.91.05.61.05.81.39.31.56.31.29.31.26.90.5
over 50 years ago10.01.812.41.414.92.038.02.523.12.157.62.028.60.9
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totaln/a0.10.10.0.0.0.0.0.0.0.0.0.0.00.0
less than 10 years ago65.11.040.61.534.01.720.81.620.31.410.61.039.20.6
11-20 years ago18.10.820.51.221.51.511.81.317.21.36.40.816.50.5
21-30 years ago6.90.511.21.012.31.28.91.114.91.28.20.99.70.4
31-40 years ago4.00.46.50.88.11.09.81.210.41.010.81.07.30.3
41-50 years ago2.20.36.10.75.20.89.81.27.30.99.71.05.70.3
over 50 years ago3.80.415.01.118.91.438.91.929.81.554.41.721.60.5
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 18.06.2020 #861098/327429
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