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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: 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/a0.10.10.10.10.0.0.0.0.0.0.0.0.00.0
less than 10 years ago57.71.018.11.214.11.36.30.99.61.02.60.526.00.5
11-20 years ago15.40.89.60.99.41.03.40.77.10.92.00.59.40.4
21-30 years ago5.70.55.00.76.50.92.80.66.70.82.70.55.10.3
31-40 years ago3.00.43.40.54.10.74.60.84.70.74.40.73.80.2
41-50 years ago1.70.33.20.52.60.63.80.73.90.63.10.62.80.2
over 50 years ago2.60.310.20.913.21.217.81.419.11.315.71.110.80.4
total86.30.749.71.549.81.838.61.851.11.630.51.457.90.5
inside perimetern/a0.0.0.0.0.0.0.0.0.0.0.0.0.0.
less than 10 years ago0.40.10.50.22.20.51.50.50.50.20.60.30.80.1
11-20 years ago0.10.10.30.20.80.30.40.20.20.20.30.20.30.1
21-30 years ago0.10.10.40.20.50.30.10.10.30.20.20.10.30.1
31-40 years ago0.0.0.10.10.50.20.70.30.30.20.40.20.30.1
41-50 years ago0.10.10.0.0.30.20.40.30.30.20.50.20.20.1
over 50 years ago0.20.10.70.21.70.52.60.61.00.34.10.61.40.1
total0.90.22.00.46.00.95.90.92.70.56.10.83.20.2
outside perimetern/a0.0.0.0.0.0.0.0.0.0.0.0.0.0.
less than 10 years ago6.60.520.51.215.91.312.01.29.81.06.60.811.10.4
11-20 years ago2.50.310.10.910.11.17.41.09.21.03.60.66.30.3
21-30 years ago1.10.25.60.74.90.85.60.97.30.94.80.74.20.2
31-40 years ago0.90.23.10.53.30.63.90.75.50.85.30.73.10.2
41-50 years ago0.40.12.80.52.60.65.10.82.80.55.80.82.60.2
over 50 years ago1.30.26.30.77.40.921.61.511.51.137.31.511.60.4
total12.80.748.31.544.21.855.51.846.21.663.31.538.80.5
totaln/a0.10.10.10.10.0.0.0.0.0.0.0.0.00.0
less than 10 years ago64.71.039.11.532.21.719.81.519.81.39.81.037.80.5
11-20 years ago18.10.820.01.220.31.411.11.216.51.25.90.815.90.4
21-30 years ago6.90.511.10.911.91.28.51.114.41.27.70.99.50.4
31-40 years ago3.90.46.50.77.91.09.31.110.61.010.11.07.20.3
41-50 years ago2.20.36.00.75.40.89.31.17.10.99.40.95.70.3
over 50 years ago4.10.417.21.122.31.542.01.931.61.557.01.623.80.5
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 18.06.2020 #861029/327360
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