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NFI1
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: production region
unit: %
unit of evaluation: accessible forest without shrub forest
grid: 1.4 x 1.4 km grid
state1983/85
production region
JuraPlateauPre-AlpsAlpsSouthern Alps Switzerland
avalanches SilvaProtecttime of last treatment (classes of 10 years) %± %± %± %± %± %±
n/an/a1.20.40.10.10.20.20.70.30.0.0.50.1
less than 10 years ago68.91.679.91.263.92.237.42.018.13.663.70.8
11-20 years ago18.81.413.21.015.91.715.21.516.03.415.60.7
21-30 years ago5.60.82.90.55.51.010.91.310.32.85.90.4
31-40 years ago1.50.40.90.35.01.07.31.111.53.03.40.3
41-50 years ago0.50.20.20.12.30.73.70.85.82.11.50.2
over 50 years ago3.60.72.90.57.31.224.91.838.24.59.50.5
total100.0.100.0.100.0.100.0.100.0.100.0.
inside perimetern/a0.0.0.0.0.0.0.30.31.61.50.40.3
less than 10 years ago57.310.30.0.46.06.230.92.614.34.432.12.2
11-20 years ago8.25.50.0.28.85.621.32.316.34.720.91.9
21-30 years ago17.47.90.0.8.23.515.12.013.04.314.01.6
31-40 years ago4.24.10.0.7.43.28.21.56.63.27.61.2
41-50 years ago0.0.0.0.0.0.3.41.09.63.73.60.9
over 50 years ago12.97.0100.0.9.63.720.82.338.76.221.41.9
total100.0.100.0.100.0.100.0.100.0.100.0.
outside perimetern/a0.0.0.0.0.0.0.50.30.0.0.20.1
less than 10 years ago50.23.966.54.757.62.235.21.715.81.738.91.1
11-20 years ago18.53.114.83.523.31.918.21.411.31.517.70.8
21-30 years ago10.42.46.82.56.91.214.61.311.31.511.20.7
31-40 years ago6.31.91.01.04.30.910.11.118.01.89.80.7
41-50 years ago2.51.20.0.1.70.54.10.712.31.55.10.5
over 50 years ago12.22.610.93.16.31.117.31.431.32.117.20.8
total100.0.100.0.100.0.100.0.100.0.100.0.
totaln/a0.90.30.10.10.10.10.50.20.10.10.40.1
less than 10 years ago65.61.578.61.259.91.535.21.216.01.452.00.6
11-20 years ago18.51.213.31.020.11.217.70.912.61.316.80.5
21-30 years ago6.60.83.30.56.30.813.40.811.31.28.50.4
31-40 years ago2.40.50.90.34.80.78.70.715.81.46.10.3
41-50 years ago0.80.30.20.11.90.43.80.510.91.23.00.2
over 50 years ago5.20.73.70.67.00.820.71.033.21.813.30.4
total100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 19.06.2020 #853428/319759
NFI1
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: production region
unit: %
unit of evaluation: accessible forest without shrub forest NFI1/NFI2/NFI3/NFI4
grid: 1.4 x 1.4 km grid
state1983/85
production region
JuraPlateauPre-AlpsAlpsSouthern Alps Switzerland
avalanches SilvaProtecttime of last treatment (classes of 10 years) %± %± %± %± %± %±
n/an/a1.20.40.10.10.20.20.70.40.0.0.50.1
less than 10 years ago69.11.780.21.263.82.238.12.114.93.664.40.9
11-20 years ago18.81.413.11.115.61.715.31.517.43.815.60.7
21-30 years ago5.50.83.00.55.71.110.81.310.93.15.90.4
31-40 years ago1.50.40.90.35.21.07.61.113.13.43.50.3
41-50 years ago0.40.20.20.12.40.74.00.84.82.11.50.2
over 50 years ago3.50.72.60.57.11.223.41.838.94.88.70.5
total100.0.100.0.100.0.100.0.100.0.100.0.
inside perimetern/a0.0.0.0.0.0.0.30.31.61.60.40.3
less than 10 years ago57.310.30.0.46.76.331.12.614.54.532.42.2
11-20 years ago8.25.50.0.27.65.621.12.316.64.820.81.9
21-30 years ago17.47.90.0.8.33.615.22.013.24.414.11.6
31-40 years ago4.24.10.0.7.63.38.41.66.73.27.81.3
41-50 years ago0.0.0.0.0.0.3.51.09.73.83.70.9
over 50 years ago12.97.00.0.9.83.820.42.337.76.220.81.9
total100.0.0.0.100.0.100.0.100.0.100.0.
outside perimetern/a0.0.0.0.0.0.0.50.30.0.0.20.1
less than 10 years ago50.24.067.24.758.12.335.81.715.71.739.31.1
11-20 years ago18.73.115.03.623.62.017.81.411.31.517.60.9
21-30 years ago10.62.46.92.56.51.214.71.311.51.511.20.7
31-40 years ago6.31.91.01.04.00.910.31.118.21.89.80.7
41-50 years ago2.51.30.0.1.70.64.20.712.51.65.20.5
over 50 years ago11.72.510.03.06.11.116.71.430.82.116.70.8
total100.0.100.0.100.0.100.0.100.0.100.0.
totaln/a1.00.30.10.10.10.10.60.20.20.20.40.1
less than 10 years ago65.71.579.01.260.11.535.71.215.51.552.50.6
11-20 years ago18.51.313.21.020.01.317.60.912.81.316.80.5
21-30 years ago6.70.83.40.56.20.813.50.911.61.38.50.4
31-40 years ago2.40.50.90.34.80.79.00.716.31.56.20.3
41-50 years ago0.70.30.20.11.90.44.00.511.01.33.00.2
over 50 years ago5.10.73.20.56.80.819.71.032.81.912.70.4
total100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 19.06.2020 #853429/319760
NFI1
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: production region
unit: %
unit of evaluation: accessible forest without shrub forest
grid: terrestrial grid NFI1
state1983/85
production region
JuraPlateauPre-AlpsAlpsSouthern Alps Switzerland
avalanches SilvaProtecttime of last treatment (classes of 10 years) %± %± %± %± %± %±
n/an/a1.10.30.30.10.20.10.70.20.0.0.50.1
less than 10 years ago68.51.279.60.964.31.537.41.417.72.563.40.6
11-20 years ago18.51.013.50.816.21.215.71.015.12.415.80.5
21-30 years ago4.60.52.70.45.60.79.00.810.62.05.20.3
31-40 years ago2.10.40.90.23.90.67.20.713.32.33.40.2
41-50 years ago0.60.20.30.11.60.43.60.53.51.21.40.1
over 50 years ago4.60.52.70.48.20.926.41.339.83.210.20.4
total100.0.100.0.100.0.100.0.100.0.100.0.
inside perimetern/a0.0.0.0.1.71.20.50.30.70.70.60.3
less than 10 years ago51.38.050.035.448.84.533.01.813.82.932.91.5
11-20 years ago20.36.40.0.24.23.919.11.516.63.119.41.3
21-30 years ago15.45.80.0.10.62.814.91.412.42.714.01.1
31-40 years ago2.62.50.0.7.32.48.51.112.42.78.70.9
41-50 years ago0.0.0.0.0.0.4.70.812.42.75.10.7
over 50 years ago10.34.950.035.47.42.419.31.531.83.919.41.3
total100.0.100.0.100.0.100.0.100.0.100.0.
outside perimetern/a0.0.0.50.50.30.20.50.20.0.0.30.1
less than 10 years ago52.62.965.63.457.11.636.01.315.41.239.20.8
11-20 years ago18.42.316.42.621.01.317.81.010.81.016.90.6
21-30 years ago9.51.76.51.78.30.913.90.912.31.111.30.5
31-40 years ago6.61.53.01.24.50.710.30.818.11.210.00.5
41-50 years ago1.70.80.0.1.70.44.00.511.21.04.80.3
over 50 years ago11.21.88.01.97.10.817.61.032.31.517.50.6
total100.0.100.0.100.0.100.0.100.0.100.0.
totaln/a0.90.20.30.10.30.10.60.10.10.10.50.1
less than 10 years ago65.71.178.30.960.01.135.90.815.61.052.10.4
11-20 years ago18.50.913.80.718.90.817.30.712.20.916.50.4
21-30 years ago5.60.53.10.47.10.612.30.612.00.98.20.3
31-40 years ago2.80.41.10.24.40.48.80.516.61.06.20.2
41-50 years ago0.70.20.30.11.60.34.00.310.00.82.90.2
over 50 years ago5.70.53.20.47.60.621.10.733.51.313.60.3
total100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 19.06.2020 #853430/319761
NFI1
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: production region
unit: %
unit of evaluation: forest
grid: terrestrial grid NFI1
state1983/85
production region
JuraPlateauPre-AlpsAlpsSouthern Alps Switzerland
avalanches SilvaProtecttime of last treatment (classes of 10 years) %± %± %± %± %± %±
n/an/a1.30.30.30.12.10.417.81.036.22.47.00.3
less than 10 years ago68.21.279.40.962.31.530.11.210.41.658.50.6
11-20 years ago18.51.013.50.815.91.112.60.89.11.514.60.4
21-30 years ago4.60.52.80.45.60.77.30.76.21.24.90.3
31-40 years ago2.10.40.90.23.80.66.00.68.51.43.30.2
41-50 years ago0.60.20.30.11.50.42.80.42.60.81.30.1
over 50 years ago4.70.52.80.48.80.923.41.127.02.310.40.4
total100.0.100.0.100.0.100.0.100.0.100.0.
inside perimetern/a2.32.30.0.3.11.54.00.77.12.14.30.6
less than 10 years ago50.17.950.035.446.64.431.51.812.92.731.31.4
11-20 years ago19.96.30.0.23.03.718.11.515.52.918.31.2
21-30 years ago15.15.70.0.10.12.714.41.311.62.613.41.1
31-40 years ago2.52.50.0.7.82.48.41.111.62.68.50.9
41-50 years ago0.0.0.0.0.0.4.60.811.62.64.90.7
over 50 years ago10.14.850.035.49.42.619.11.529.73.719.21.2
total100.0.100.0.100.0.100.0.100.0.100.0.
outside perimetern/a0.70.50.50.50.60.24.50.511.70.95.00.3
less than 10 years ago52.42.965.13.356.41.633.81.213.21.036.60.7
11-20 years ago18.22.216.72.620.91.316.80.99.30.915.90.6
21-30 years ago9.41.76.41.78.20.913.10.910.60.910.70.5
31-40 years ago6.51.42.91.24.60.710.00.816.01.19.70.5
41-50 years ago1.70.80.0.1.80.43.80.59.90.94.60.3
over 50 years ago11.11.88.41.97.50.818.01.029.41.417.50.6
total100.0.100.0.100.0.100.0.100.0.100.0.
totaln/a1.20.20.40.11.50.39.80.517.00.96.00.2
less than 10 years ago65.51.178.10.958.61.031.90.812.50.848.50.4
11-20 years ago18.50.913.80.718.60.815.30.69.80.715.40.3
21-30 years ago5.50.53.10.47.10.611.00.59.60.77.70.2
31-40 years ago2.80.41.10.24.40.48.10.413.80.86.00.2
41-50 years ago0.70.20.30.11.60.33.60.38.30.72.80.1
over 50 years ago5.80.53.30.48.20.620.40.628.81.113.60.3
total100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 19.06.2020 #853431/319762
NFI1
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: production region
unit: %
unit of evaluation: forest
grid: 1.4 x 1.4 km grid
state1983/85
production region
JuraPlateauPre-AlpsAlpsSouthern Alps Switzerland
avalanches SilvaProtecttime of last treatment (classes of 10 years) %± %± %± %± %± %±
n/an/a1.40.40.30.23.10.818.51.436.63.47.30.4
less than 10 years ago68.61.679.51.261.22.129.71.610.82.258.50.8
11-20 years ago18.81.413.11.015.41.612.11.210.02.214.40.6
21-30 years ago5.50.83.00.55.51.08.81.06.11.75.50.4
31-40 years ago1.60.40.90.34.80.96.10.96.81.83.20.3
41-50 years ago0.50.20.20.12.20.62.90.64.01.41.40.2
over 50 years ago3.60.73.10.57.91.221.91.525.73.19.60.5
total100.0.100.0.100.0.100.0.100.0.100.0.
inside perimetern/a0.0.0.0.1.31.34.51.18.93.54.40.9
less than 10 years ago57.310.30.0.44.06.029.62.513.34.130.62.1
11-20 years ago8.25.50.0.27.55.419.92.215.14.419.71.8
21-30 years ago17.47.90.0.7.83.414.81.912.04.013.61.5
31-40 years ago4.24.10.0.8.73.47.71.46.13.07.41.2
41-50 years ago0.0.0.0.0.0.3.21.08.93.53.40.8
over 50 years ago12.97.0100.0.10.73.820.42.235.85.920.91.8
total100.0.100.0.100.0.100.0.100.0.100.0.
outside perimetern/a0.60.60.0.0.40.34.00.712.01.34.80.5
less than 10 years ago49.93.965.94.756.82.233.11.613.51.536.31.0
11-20 years ago18.43.014.73.523.01.917.31.39.71.316.60.8
21-30 years ago10.42.46.72.56.81.113.81.29.81.310.60.7
31-40 years ago6.21.91.00.94.20.910.21.016.01.59.50.6
41-50 years ago2.51.20.0.1.90.63.90.710.71.34.90.5
over 50 years ago12.12.511.73.27.11.217.61.328.41.917.30.8
total100.0.100.0.100.0.100.0.100.0.100.0.
totaln/a1.20.40.30.11.80.49.80.717.61.36.20.3
less than 10 years ago65.21.578.21.258.11.531.21.012.81.248.20.6
11-20 years ago18.51.213.21.019.61.215.70.810.21.115.60.5
21-30 years ago6.60.83.30.56.20.712.00.79.11.08.00.3
31-40 years ago2.40.50.90.34.70.68.10.613.01.25.80.3
41-50 years ago0.80.30.20.11.90.43.40.48.91.02.80.2
over 50 years ago5.20.73.90.67.70.819.80.928.31.613.30.4
total100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 19.06.2020 #853432/319763
NFI2
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: production region
unit: %
unit of evaluation: accessible forest without shrub forest NFI1/NFI2/NFI3/NFI4
grid: 1.4 x 1.4 km grid
state1993/95
production region
JuraPlateauPre-AlpsAlpsSouthern Alps Switzerland
avalanches SilvaProtecttime of last treatment (classes of 10 years) %± %± %± %± %± %±
n/an/a0.0.0.0.0.0.0.40.31.01.00.10.1
less than 10 years ago56.61.870.71.445.92.332.42.014.23.553.70.9
11-20 years ago27.41.621.21.329.82.120.81.79.83.023.80.8
21-30 years ago9.71.14.30.69.11.311.11.39.33.08.00.5
31-40 years ago3.10.61.60.43.60.87.21.111.93.23.70.3
41-50 years ago0.90.30.90.33.70.94.70.911.13.22.40.3
over 50 years ago2.40.51.40.47.81.223.41.842.64.98.30.5
total100.0.100.0.100.0.100.0.100.0.100.0.
inside perimetern/a0.0.0.0.0.0.0.0.0.0.0.0.
less than 10 years ago52.210.40.0.39.16.129.02.613.04.329.62.1
11-20 years ago22.28.70.0.29.45.719.72.312.94.320.31.9
21-30 years ago8.25.50.0.15.54.514.52.013.44.414.11.6
31-40 years ago8.75.90.0.4.72.712.41.99.73.810.81.5
41-50 years ago0.0.0.0.3.12.16.41.45.12.95.51.1
over 50 years ago8.75.90.0.8.13.518.02.245.86.419.81.9
total100.0.0.0.100.0.100.0.100.0.100.0.
outside perimetern/a0.0.0.0.0.0.0.30.20.0.0.10.1
less than 10 years ago40.13.960.44.944.52.330.41.710.51.431.51.0
11-20 years ago26.33.521.84.128.32.120.31.511.01.520.60.9
21-30 years ago10.72.57.02.612.81.512.41.29.71.411.40.7
31-40 years ago7.92.12.81.64.81.010.71.110.91.58.70.6
41-50 years ago5.71.81.01.02.90.88.21.016.91.88.40.6
over 50 years ago9.32.37.02.56.61.117.81.440.92.319.30.9
total100.0.100.0.100.0.100.0.100.0.100.0.
totaln/a0.0.0.0.0.0.0.20.10.20.20.10.0
less than 10 years ago53.71.669.81.444.81.630.81.111.41.343.50.6
11-20 years ago27.11.421.31.229.11.420.31.011.01.322.30.6
21-30 years ago9.81.04.50.611.21.012.30.810.01.29.80.4
31-40 years ago4.00.61.70.44.30.69.80.710.91.36.10.3
41-50 years ago1.70.40.90.33.30.66.70.614.81.44.90.3
over 50 years ago3.70.61.90.47.20.819.81.041.72.013.30.4
total100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 19.06.2020 #853433/319764
NFI2
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: production region
unit: %
unit of evaluation: accessible forest without shrub forest
grid: 1.4 x 1.4 km grid
state1993/95
production region
JuraPlateauPre-AlpsAlpsSouthern Alps Switzerland
avalanches SilvaProtecttime of last treatment (classes of 10 years) %± %± %± %± %± %±
n/an/a0.60.30.60.20.80.43.00.70.80.81.10.2
less than 10 years ago56.21.870.11.444.52.230.11.812.73.051.70.9
11-20 years ago26.91.621.11.329.42.019.71.613.83.023.40.8
21-30 years ago9.61.04.30.69.31.311.01.28.92.68.00.5
31-40 years ago3.10.61.60.43.80.87.31.010.92.83.90.3
41-50 years ago0.90.30.90.33.50.84.90.811.02.82.60.3
over 50 years ago2.70.61.50.48.71.224.01.741.94.39.30.5
total100.0.100.0.100.0.100.0.100.0.100.0.
inside perimetern/a0.0.0.0.0.0.0.0.0.0.0.0.
less than 10 years ago52.210.40.0.38.56.128.82.513.74.329.32.1
11-20 years ago22.28.70.0.28.95.620.12.212.14.020.31.8
21-30 years ago8.25.50.0.15.34.514.52.012.64.214.01.6
31-40 years ago8.75.90.0.4.72.612.51.89.13.610.81.4
41-50 years ago0.0.0.0.3.02.16.21.34.82.75.21.0
over 50 years ago8.75.90.0.9.53.717.92.147.66.220.31.8
total100.0.0.0.100.0.100.0.100.0.100.0.
outside perimetern/a0.70.70.0.0.0.1.20.41.00.50.80.2
less than 10 years ago40.43.859.84.944.22.330.01.611.21.431.21.0
11-20 years ago25.63.421.64.127.62.020.21.410.61.420.20.9
21-30 years ago10.42.47.02.512.81.512.11.29.21.311.20.7
31-40 years ago7.72.12.81.65.01.010.51.110.21.48.50.6
41-50 years ago5.51.81.01.03.20.87.80.916.51.78.20.6
over 50 years ago9.72.37.92.77.31.218.21.441.32.219.90.9
total100.0.100.0.100.0.100.0.100.0.100.0.
totaln/a0.60.30.50.20.40.21.60.30.90.40.90.1
less than 10 years ago53.51.669.21.444.01.529.81.111.71.242.40.6
11-20 years ago26.61.421.21.228.51.420.00.911.31.222.00.5
21-30 years ago9.70.94.50.611.31.012.20.89.51.19.70.4
31-40 years ago4.00.61.70.44.40.69.70.710.31.26.10.3
41-50 years ago1.60.40.90.33.30.56.40.614.41.34.80.3
over 50 years ago3.90.62.10.48.10.820.30.942.01.914.10.4
total100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 19.06.2020 #853434/319765
NFI2
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: production region
unit: %
unit of evaluation: accessible forest without shrub forest
grid: terrestrial grid NFI2
state1993/95
production region
JuraPlateauPre-AlpsAlpsSouthern Alps Switzerland
avalanches SilvaProtecttime of last treatment (classes of 10 years) %± %± %± %± %± %±
n/an/a6.00.84.80.69.11.210.21.112.32.77.20.4
less than 10 years ago55.51.769.21.343.42.130.31.711.82.750.90.8
11-20 years ago24.01.418.81.125.51.817.61.412.12.720.70.7
21-30 years ago8.60.93.80.68.11.19.81.17.82.37.10.4
31-40 years ago2.80.61.40.33.30.76.50.99.52.43.50.3
41-50 years ago0.80.30.80.33.10.74.40.89.72.52.30.2
over 50 years ago2.40.51.40.37.61.121.21.536.73.98.20.5
total100.0.100.0.100.0.100.0.100.0.100.0.
inside perimetern/a7.55.10.0.9.83.57.21.46.62.87.51.1
less than 10 years ago48.210.00.0.36.55.628.92.414.84.229.02.0
11-20 years ago20.38.10.0.25.35.018.02.012.13.818.41.7
21-30 years ago7.55.10.0.13.44.013.01.811.33.812.61.4
31-40 years ago8.25.60.0.4.12.311.21.78.23.29.71.3
41-50 years ago0.0.0.0.2.61.85.51.24.32.54.70.9
over 50 years ago8.25.60.0.8.43.316.11.942.65.818.21.7
total100.0.0.0.100.0.100.0.100.0.100.0.
outside perimetern/a5.61.77.72.57.11.19.51.09.81.38.60.6
less than 10 years ago40.53.756.94.643.82.129.81.511.51.431.00.9
11-20 years ago23.33.119.03.624.31.817.91.39.51.317.90.8
21-30 years ago9.52.26.12.311.21.310.71.08.21.29.90.6
31-40 years ago7.21.92.51.54.40.99.21.09.21.27.50.5
41-50 years ago5.11.70.90.92.80.76.80.814.81.57.30.5
over 50 years ago8.92.16.92.46.41.016.01.237.12.017.70.8
total100.0.100.0.100.0.100.0.100.0.100.0.
totaln/a5.90.75.10.68.20.89.40.610.01.17.80.3
less than 10 years ago53.01.568.11.343.21.429.91.011.91.241.90.6
11-20 years ago23.81.318.81.124.91.217.80.910.31.119.50.5
21-30 years ago8.70.94.00.59.80.810.80.78.41.08.60.3
31-40 years ago3.60.61.50.33.80.58.60.69.11.05.40.3
41-50 years ago1.40.40.80.22.90.55.70.512.81.24.30.2
over 50 years ago3.60.61.80.47.10.717.90.937.51.712.50.4
total100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 19.06.2020 #853435/319766
NFI2
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: production region
unit: %
unit of evaluation: forest
grid: 1.4 x 1.4 km grid
state1993/95
production region
JuraPlateauPre-AlpsAlpsSouthern Alps Switzerland
avalanches SilvaProtecttime of last treatment (classes of 10 years) %± %± %± %± %± %±
n/an/a1.10.41.00.35.31.024.51.539.53.39.80.5
less than 10 years ago55.91.869.81.442.62.223.41.57.81.947.20.8
11-20 years ago26.81.621.01.228.02.015.31.28.41.921.30.7
21-30 years ago9.51.04.20.68.91.28.61.05.41.67.30.4
31-40 years ago3.10.61.60.43.60.85.70.86.71.73.60.3
41-50 years ago0.90.30.90.33.30.83.80.76.71.72.30.3
over 50 years ago2.60.61.50.48.31.218.71.325.53.08.50.5
total100.0.100.0.100.0.100.0.100.0.100.0.
inside perimetern/a0.0.0.0.1.61.66.11.34.42.55.01.0
less than 10 years ago52.210.40.0.37.96.027.02.413.14.127.72.0
11-20 years ago22.28.70.0.28.55.618.82.111.63.919.21.8
21-30 years ago8.25.50.0.15.14.413.61.812.04.013.31.5
31-40 years ago8.75.90.0.4.62.611.71.78.73.410.21.4
41-50 years ago0.0.0.0.3.02.15.81.34.62.65.01.0
over 50 years ago8.75.9100.0.9.43.617.12.045.56.119.61.8
total100.0.100.0.100.0.100.0.100.0.100.0.
outside perimetern/a1.20.91.00.92.10.76.70.915.61.57.30.5
less than 10 years ago40.23.859.24.943.42.228.41.59.51.229.11.0
11-20 years ago25.53.421.44.026.92.019.11.39.01.218.80.8
21-30 years ago10.32.46.92.512.51.511.41.17.81.110.40.6
31-40 years ago7.72.02.81.64.91.09.91.08.71.27.90.6
41-50 years ago5.51.81.00.93.10.87.30.914.21.47.70.6
over 50 years ago9.62.37.82.77.11.117.31.335.32.018.70.8
total100.0.100.0.100.0.100.0.100.0.100.0.
totaln/a1.10.31.00.33.60.614.00.820.61.38.50.3
less than 10 years ago53.31.668.81.442.71.526.11.09.31.039.10.6
11-20 years ago26.51.421.01.227.51.417.50.89.11.020.30.5
21-30 years ago9.60.94.50.610.90.910.60.77.60.98.90.4
31-40 years ago4.00.61.70.44.20.68.40.68.20.95.70.3
41-50 years ago1.60.40.90.33.20.55.60.511.61.14.50.3
over 50 years ago3.90.62.20.47.80.817.80.833.71.613.00.4
total100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 19.06.2020 #853436/319767
NFI2
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: production region
unit: %
unit of evaluation: forest
grid: terrestrial grid NFI2
state1993/95
production region
JuraPlateauPre-AlpsAlpsSouthern Alps Switzerland
avalanches SilvaProtecttime of last treatment (classes of 10 years) %± %± %± %± %± %±
n/an/a6.50.85.30.612.91.430.81.545.43.215.50.6
less than 10 years ago55.21.768.81.341.72.023.31.47.31.746.40.8
11-20 years ago23.81.418.71.124.41.713.51.17.51.718.90.6
21-30 years ago8.50.93.70.57.71.17.50.94.91.46.50.4
31-40 years ago2.80.51.40.33.10.75.00.75.91.53.20.3
41-50 years ago0.80.30.80.32.90.73.40.66.01.62.10.2
over 50 years ago2.40.51.30.37.21.016.41.222.92.77.50.4
total100.0.100.0.100.0.100.0.100.0.100.0.
inside perimetern/a7.55.10.0.11.03.712.31.710.33.411.61.4
less than 10 years ago48.210.00.0.36.05.627.22.314.34.027.61.9
11-20 years ago20.38.10.0.24.95.017.01.911.73.717.51.6
21-30 years ago7.55.10.0.13.23.912.31.710.93.612.01.4
31-40 years ago8.25.60.0.4.02.310.61.67.93.19.21.2
41-50 years ago0.0.0.0.2.61.85.21.14.12.44.50.9
over 50 years ago8.25.6100.0.8.33.215.41.840.95.717.71.6
total100.0.100.0.100.0.100.0.100.0.100.0.
outside perimetern/a6.11.88.52.68.91.214.41.122.81.614.40.7
less than 10 years ago40.33.756.44.643.02.128.31.49.81.229.00.9
11-20 years ago23.13.118.83.623.81.816.91.28.11.116.70.7
21-30 years ago9.52.26.12.211.01.310.11.07.01.09.30.6
31-40 years ago7.11.92.51.44.30.98.70.97.81.17.00.5
41-50 years ago5.11.70.90.82.80.76.50.812.71.36.90.5
over 50 years ago8.82.16.92.36.31.015.21.231.81.816.60.7
total100.0.100.0.100.0.100.0.100.0.100.0.
totaln/a6.40.75.60.611.00.920.90.827.41.414.80.4
less than 10 years ago52.71.567.71.342.01.426.00.99.51.038.70.5
11-20 years ago23.61.318.71.124.11.215.50.88.30.918.00.5
21-30 years ago8.70.83.90.59.50.89.40.66.80.87.90.3
31-40 years ago3.60.61.50.33.70.57.50.57.40.85.00.3
41-50 years ago1.40.40.80.22.80.55.00.510.41.04.00.2
over 50 years ago3.60.61.90.46.90.715.80.830.31.511.60.4
total100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 19.06.2020 #853437/319768
NFI1
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: canton
unit: 1000 ha
unit of evaluation: accessible forest without shrub forest NFI1/NFI2/NFI3/NFI4
grid: 1.4 x 1.4 km grid
state1983/85
avalanches SilvaProtect
n/ainside perimeteroutside perimetertotal
cantontime of last treatment (classes of 10 years)1000 ha± %1000 ha± %1000 ha± %1000 ha± %
AGn/a0.0.0.0.0.0.0.0.
less than 10 years ago36.640.0.0.0.36.64
11-20 years ago6.8160.0.0.0.6.816
21-30 years ago1.6350.0.0.0.1.635
31-40 years ago0.6580.0.0.0.0.658
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago1.0440.0.0.0.1.044
total46.720.0.0.0.46.72
AIn/a0.0.0.0.0.0.0.0.
less than 10 years ago1.4340.21001.7303.316
11-20 years ago0.6580.4720.3671.235
21-30 years ago0.0.0.0.0.0.0.0.
31-40 years ago0.21000.0.0.21000.471
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.21000.0.0.0.0.2100
total2.3250.6572.2245.19
ARn/a0.0.0.0.0.0.0.0.
less than 10 years ago3.5210.0.1.6325.115
11-20 years ago1.3360.21001.0392.525
21-30 years ago0.0.0.0.0.21000.2100
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.31000.0.0.0.0.3100
over 50 years ago0.21000.0.0.0.0.2100
total5.3130.21002.7228.16
BEn/a0.0.0.21000.21000.471
less than 10 years ago62.356.41739.16107.93
11-20 years ago10.4143.12512.51226.08
21-30 years ago3.8231.2414.9209.914
31-40 years ago1.6350.8501.8334.222
41-50 years ago0.6580.0.1.9332.529
over 50 years ago4.8201.0454.52110.313
total83.5412.71264.94161.11
BL/BSn/a0.0.0.0.0.0.0.0.
less than 10 years ago12.290.0.2.42914.67
11-20 years ago1.7340.0.1.1442.827
21-30 years ago0.9500.0.0.4711.341
31-40 years ago0.21000.0.0.0.0.2100
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.5670.0.0.0.0.567
total15.760.0.3.92219.64
FRn/a0.0.0.0.0.0.0.0.
less than 10 years ago14.3100.9445.41820.67
11-20 years ago5.7180.0.4.91810.612
21-30 years ago2.5290.0.0.4722.926
31-40 years ago1.2410.21000.7582.132
41-50 years ago0.0.0.0.0.21000.2100
over 50 years ago2.1320.0.1.2413.325
total25.951.04012.81039.73
GEn/a0.0.0.0.0.0.0.0.
less than 10 years ago0.8660.0.0.0.0.866
11-20 years ago0.41000.0.0.0.0.4100
21-30 years ago0.8660.0.0.0.0.866
31-40 years ago1.2500.0.0.0.1.250
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.0.0.0.0.0.0.0.
total3.1130.0.0.0.3.113
GLn/a0.0.0.0.0.0.0.0.
less than 10 years ago3.1230.8503.1237.014
11-20 years ago0.6581.1390.6572.328
21-30 years ago0.4710.6570.8501.832
31-40 years ago0.0.0.4710.21000.657
41-50 years ago0.21000.0.0.0.0.2100
over 50 years ago0.6580.9440.4711.930
total4.9183.8205.11713.87
GRn/a0.4710.0.0.0.0.471
less than 10 years ago22.497.91626.6856.95
11-20 years ago6.5173.72311.91222.29
21-30 years ago5.3192.23010.01417.610
31-40 years ago4.8201.4387.11613.312
41-50 years ago2.0321.7333.1256.817
over 50 years ago12.7123.82210.81327.48
total54.2520.7969.64144.52
JUn/a0.0.0.0.0.0.0.0.
less than 10 years ago13.5100.5524.51918.57
11-20 years ago4.5200.21002.7267.415
21-30 years ago1.9310.21000.8502.925
31-40 years ago0.21000.0.0.6580.850
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago1.2410.0.2.0313.124
total21.360.94310.51132.83
LUn/a0.0.0.0.0.0.0.0.
less than 10 years ago24.860.4714.02229.25
11-20 years ago4.6200.21002.1316.816
21-30 years ago1.0440.0.0.21001.241
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.9490.0.0.0.0.949
over 50 years ago0.6580.0.0.6571.241
total31.940.6586.81639.43
NEn/a0.21000.0.0.0.0.2100
less than 10 years ago17.371.0442.12820.46
11-20 years ago3.9210.0.0.21004.120
21-30 years ago0.8510.0.0.0.0.851
31-40 years ago0.9510.0.0.21001.145
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.4700.0.0.4720.851
total23.451.0442.82427.33
NWn/a0.31000.0.0.0.0.3100
less than 10 years ago1.8330.4721.5373.820
11-20 years ago0.0.0.4720.7561.144
21-30 years ago0.0.0.0.0.0.0.0.
31-40 years ago0.4720.0.0.4670.848
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago1.0490.31000.0.1.243
total3.5211.2442.6267.29
OWn/a0.0.0.0.0.0.0.0.
less than 10 years ago4.1200.5602.9247.513
11-20 years ago1.4370.11001.0452.626
21-30 years ago0.6580.21000.9491.734
31-40 years ago1.0440.5710.21001.734
41-50 years ago0.7580.0.0.9481.536
over 50 years ago1.3370.3721.5343.122
total9.1121.7337.41318.14
SGn/a0.0.0.0.0.0.0.0.
less than 10 years ago14.2111.73513.31129.26
11-20 years ago2.4291.3414.1217.915
21-30 years ago0.8500.4712.7273.923
31-40 years ago1.4380.7581.1413.225
41-50 years ago0.0.0.0.1.3401.340
over 50 years ago1.3410.21001.7353.225
total20.194.42124.3748.84
SHn/a0.21000.0.0.0.0.2100
less than 10 years ago10.160.0.0.210010.36
11-20 years ago0.9410.0.0.21001.137
21-30 years ago0.4710.0.0.0.0.471
31-40 years ago0.21000.0.0.0.0.2100
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.0.0.0.0.0.0.0.
total11.940.0.0.46912.33
SOn/a0.0.0.0.0.0.0.0.
less than 10 years ago23.950.0.1.73325.64
11-20 years ago2.7250.0.0.21002.924
21-30 years ago1.1410.0.0.5701.636
31-40 years ago0.21000.0.0.5700.758
41-50 years ago0.21000.0.0.0.0.2100
over 50 years ago0.3710.21000.0.0.557
total28.530.21002.92631.62
SZn/a0.0.0.0.0.0.0.0.
less than 10 years ago6.7160.3706.11613.29
11-20 years ago2.0310.6571.3373.921
21-30 years ago1.6350.0.1.5343.124
31-40 years ago0.8500.0.1.1401.930
41-50 years ago0.6580.0.0.0.0.658
over 50 years ago1.8330.4710.6582.826
total13.5101.43710.71125.54
TGn/a0.0.0.0.0.0.0.0.
less than 10 years ago14.170.0.2.02816.05
11-20 years ago2.6250.0.0.21002.824
21-30 years ago0.0.0.0.0.21000.2100
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.6590.0.0.0.0.659
total17.250.0.2.42619.63
TIn/a0.0.0.21000.0.0.2100
less than 10 years ago2.5290.65810.31413.312
11-20 years ago2.8261.4388.41512.712
21-30 years ago2.0311.2418.11511.213
31-40 years ago1.9330.47014.21116.410
41-50 years ago0.6570.4719.91410.813
over 50 years ago6.6173.92224.7835.27
total16.3108.01575.6399.92
URn/a0.0.0.0.0.0.0.0.
less than 10 years ago1.1400.7482.6264.418
11-20 years ago1.2400.8490.4692.426
21-30 years ago0.4710.6560.0.1.043
31-40 years ago0.4720.21000.21000.850
41-50 years ago0.4670.21000.0.0.652
over 50 years ago1.4361.0451.5363.820
total4.8183.5214.61812.96
VDn/a1.8330.0.0.0.1.833
less than 10 years ago38.061.8335.11944.95
11-20 years ago17.1101.0453.52321.69
21-30 years ago4.1210.8502.6277.516
31-40 years ago1.6350.8501.6353.922
41-50 years ago1.2410.0.0.6581.833
over 50 years ago3.7230.6581.9316.217
total67.535.01915.21087.72
VSn/a0.21000.0.0.5570.750
less than 10 years ago6.0184.6209.81320.59
11-20 years ago4.0224.3219.11417.410
21-30 years ago3.3255.2199.21417.710
31-40 years ago2.2302.0317.81511.912
41-50 years ago1.3381.0452.7265.019
over 50 years ago7.5165.81812.41225.78
total24.5822.9851.6599.02
ZGn/a0.0.0.0.0.0.0.0.
less than 10 years ago2.4230.21001.6304.213
11-20 years ago0.21000.0.0.7460.943
21-30 years ago0.0.0.0.0.0.0.0.
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.21000.0.0.0.0.2100
total2.9190.21002.3225.48
ZHn/a0.0.0.0.0.0.0.0.
less than 10 years ago38.240.0.1.53739.64
11-20 years ago6.3170.0.0.0.6.317
21-30 years ago1.5380.0.0.21001.735
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago1.2400.0.0.0.1.240
total47.120.0.1.63548.82
Switzerlandn/a3.1260.4710.7504.222
less than 10 years ago375.5228.98149.13553.51
11-20 years ago90.8418.91067.25176.93
21-30 years ago34.8812.51243.5790.95
31-40 years ago21.0107.21737.8766.05
41-50 years ago8.8153.22420.51032.68
over 50 years ago51.2618.61064.05133.74
total585.2189.84382.821057.81
© WSL, Swiss National Forest Inventory, 19.06.2020 #853438/319769
NFI1
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: canton
unit: 1000 ha
unit of evaluation: accessible forest without shrub forest
grid: 1.4 x 1.4 km grid
state1983/85
avalanches SilvaProtect
n/ainside perimeteroutside perimetertotal
cantontime of last treatment (classes of 10 years)1000 ha± %1000 ha± %1000 ha± %1000 ha± %
AGn/a0.0.0.0.0.0.0.0.
less than 10 years ago37.040.0.0.0.37.04
11-20 years ago7.0160.0.0.0.7.016
21-30 years ago1.6350.0.0.0.1.635
31-40 years ago0.6580.0.0.0.0.658
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago1.2400.0.0.0.1.240
total47.520.0.0.0.47.52
AIn/a0.0.0.0.0.0.0.0.
less than 10 years ago1.4340.21001.7303.316
11-20 years ago0.6580.4720.3671.235
21-30 years ago0.0.0.0.0.0.0.0.
31-40 years ago0.21000.0.0.21000.471
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.21000.0.0.0.0.2100
total2.3250.6572.2245.19
ARn/a0.0.0.0.0.0.0.0.
less than 10 years ago3.5210.0.1.6325.115
11-20 years ago1.3360.21001.0392.525
21-30 years ago0.0.0.0.0.21000.2100
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.31000.0.0.0.0.3100
over 50 years ago0.21000.0.0.0.0.2100
total5.3130.21002.7228.16
BEn/a0.0.0.21000.21000.471
less than 10 years ago63.556.61740.46110.53
11-20 years ago10.8133.52312.71227.08
21-30 years ago4.4211.2415.31910.813
31-40 years ago1.6350.8502.0324.421
41-50 years ago0.6580.0.1.9332.529
over 50 years ago5.4191.0454.72011.113
total86.3413.31267.14166.71
BL/BSn/a0.0.0.0.0.0.0.0.
less than 10 years ago12.490.0.2.42914.87
11-20 years ago1.7340.0.1.1442.827
21-30 years ago0.9500.0.0.4711.341
31-40 years ago0.21000.0.0.0.0.2100
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.5670.0.0.0.0.567
total15.960.0.3.92219.73
FRn/a0.0.0.0.0.0.0.0.
less than 10 years ago14.5100.9445.41820.87
11-20 years ago5.7180.0.5.11810.812
21-30 years ago2.5290.0.0.4722.926
31-40 years ago1.2410.21000.9502.330
41-50 years ago0.0.0.0.0.21000.2100
over 50 years ago2.3300.0.1.2413.524
total26.361.04013.11040.53
GEn/a0.0.0.0.0.0.0.0.
less than 10 years ago0.8660.0.0.0.0.866
11-20 years ago0.41000.0.0.0.0.4100
21-30 years ago0.8660.0.0.0.0.866
31-40 years ago1.2500.0.0.0.1.250
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.0.0.0.0.0.0.0.
total3.1130.0.0.0.3.113
GLn/a0.0.0.0.0.0.0.0.
less than 10 years ago3.4220.8503.3237.513
11-20 years ago0.6581.1390.6572.328
21-30 years ago0.4710.6570.8501.832
31-40 years ago0.0.0.4710.21000.657
41-50 years ago0.21000.0.0.0.0.2100
over 50 years ago0.6580.9440.4711.930
total5.1173.8205.31714.27
GRn/a0.4710.0.0.0.0.471
less than 10 years ago23.698.11526.8858.55
11-20 years ago6.9173.72312.11222.89
21-30 years ago5.5192.23010.21318.010
31-40 years ago4.8201.4387.11613.312
41-50 years ago2.0321.7333.1256.817
over 50 years ago15.0114.22112.01231.27
total58.2521.3971.44150.92
JUn/a0.0.0.0.0.0.0.0.
less than 10 years ago14.390.5524.51919.37
11-20 years ago4.7190.21002.7267.615
21-30 years ago1.9310.21000.8502.925
31-40 years ago0.21000.0.0.6580.850
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago1.2410.0.2.2293.323
total22.460.94310.71134.03
LUn/a0.0.0.0.0.0.0.0.
less than 10 years ago25.660.4714.02230.05
11-20 years ago4.8200.21002.1317.016
21-30 years ago1.0440.0.0.21001.241
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.9490.0.0.0.0.949
over 50 years ago1.0450.21000.6571.833
total33.340.8506.81641.03
NEn/a0.21000.0.0.0.0.2100
less than 10 years ago17.771.0442.32721.06
11-20 years ago4.2200.0.0.21004.420
21-30 years ago0.8510.0.0.0.0.851
31-40 years ago0.9510.0.0.21001.145
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.4700.0.0.4720.851
total24.151.0443.02328.23
NWn/a0.31000.0.0.0.0.3100
less than 10 years ago1.8330.4721.8344.119
11-20 years ago0.0.0.4720.7561.144
21-30 years ago0.0.0.0.0.0.0.0.
31-40 years ago0.4720.0.0.4670.848
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago1.0490.31000.0.1.243
total3.5211.2442.8247.58
OWn/a0.0.0.0.0.0.0.0.
less than 10 years ago4.3190.5602.9247.713
11-20 years ago1.4370.11001.0452.626
21-30 years ago0.6580.21001.1421.932
31-40 years ago1.0440.5710.4721.833
41-50 years ago0.7580.0.0.9481.536
over 50 years ago1.3370.3721.5343.122
total9.3121.7337.81318.74
SGn/a0.0.0.0.0.0.0.0.
less than 10 years ago14.8111.73513.61030.16
11-20 years ago2.9271.3414.9209.114
21-30 years ago1.0450.4712.7274.122
31-40 years ago1.4380.7581.1413.225
41-50 years ago0.0.0.0.1.3401.340
over 50 years ago1.8350.21002.1314.122
total21.884.42125.8752.03
SHn/a0.21000.0.0.0.0.2100
less than 10 years ago10.160.0.0.210010.36
11-20 years ago0.9410.0.0.21001.137
21-30 years ago0.4710.0.0.0.0.471
31-40 years ago0.21000.0.0.0.0.2100
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.0.0.0.0.0.0.0.
total11.940.0.0.46912.33
SOn/a0.0.0.0.0.0.0.0.
less than 10 years ago24.350.0.1.73326.04
11-20 years ago2.7250.0.0.21002.924
21-30 years ago1.1410.0.0.5701.636
31-40 years ago0.21000.0.0.5700.758
41-50 years ago0.21000.0.0.0.0.2100
over 50 years ago0.3710.21000.0.0.557
total28.930.21002.92631.92
SZn/a0.0.0.0.0.0.0.0.
less than 10 years ago7.3150.3706.11613.89
11-20 years ago2.4280.6571.3374.320
21-30 years ago1.6350.21001.8323.523
31-40 years ago0.8500.0.1.1401.930
41-50 years ago0.6580.0.0.0.0.658
over 50 years ago1.8330.6580.6582.925
total14.591.73210.91127.14
TGn/a0.0.0.0.0.0.0.0.
less than 10 years ago14.270.0.2.02816.15
11-20 years ago2.6250.0.0.21002.824
21-30 years ago0.0.0.0.0.21000.2100
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.6590.0.0.0.0.659
total17.350.0.2.42619.73
TIn/a0.0.0.21000.0.0.2100
less than 10 years ago3.6230.65810.91315.111
11-20 years ago3.0261.4388.81513.312
21-30 years ago2.2301.2418.21511.613
31-40 years ago1.9330.47014.61116.810
41-50 years ago0.9450.47110.01411.413
over 50 years ago7.2163.92226.1837.26
total18.8108.01578.73105.52
URn/a0.0.0.0.0.0.0.0.
less than 10 years ago1.3370.7482.7254.817
11-20 years ago1.2400.8490.4692.426
21-30 years ago0.4710.6560.0.1.043
31-40 years ago0.4720.21000.21000.850
41-50 years ago0.4670.21000.0.0.652
over 50 years ago1.6341.0451.6344.219
total5.2173.5215.01713.76
VDn/a1.8330.0.0.0.1.833
less than 10 years ago39.061.8335.11945.95
11-20 years ago17.5101.0453.52322.08
21-30 years ago4.3210.8502.7267.915
31-40 years ago2.0310.8501.6354.321
41-50 years ago1.4370.0.0.6582.031
over 50 years ago4.1220.8502.1306.916
total70.035.11915.61090.82
VSn/a0.21000.0.0.5570.750
less than 10 years ago6.6174.62010.21321.49
11-20 years ago4.6214.52010.01419.19
21-30 years ago3.5245.2199.21417.910
31-40 years ago2.2302.0317.81511.912
41-50 years ago1.3381.0452.7265.019
over 50 years ago8.7155.81812.91227.58
total27.1823.1853.45103.62
ZGn/a0.0.0.0.0.0.0.0.
less than 10 years ago2.4230.21001.8284.412
11-20 years ago0.21000.0.0.7460.943
21-30 years ago0.0.0.0.0.0.0.0.
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.21000.0.0.0.0.2100
total2.9190.21002.5205.57
ZHn/a0.0.0.0.0.0.0.0.
less than 10 years ago39.240.0.1.53740.63
11-20 years ago6.5170.0.0.0.6.517
21-30 years ago1.5380.0.0.21001.735
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago1.4370.0.0.0.1.437
total48.520.0.1.63550.22
Switzerlandn/a3.1260.4710.7504.222
less than 10 years ago386.9229.38152.73568.91
11-20 years ago94.8419.51069.75184.03
21-30 years ago36.4712.71244.9794.14
31-40 years ago21.4107.21738.8767.45
41-50 years ago9.4153.22420.71033.48
over 50 years ago57.8619.51068.35145.63
total609.7191.94395.921097.51
© WSL, Swiss National Forest Inventory, 19.06.2020 #853439/319770
NFI1
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: canton
unit: 1000 ha
unit of evaluation: accessible forest without shrub forest
grid: terrestrial grid NFI1
state1983/85
avalanches SilvaProtect
n/ainside perimeteroutside perimetertotal
cantontime of last treatment (classes of 10 years)1000 ha± %1000 ha± %1000 ha± %1000 ha± %
AGn/a0.0.0.0.0.0.0.0.
less than 10 years ago38.830.0.0.0.38.83
11-20 years ago6.3120.0.0.0.6.312
21-30 years ago1.4260.0.0.0.1.426
31-40 years ago0.6410.0.0.0.0.641
41-50 years ago0.11000.0.0.0.0.1100
over 50 years ago0.8350.0.0.0.0.835
total47.910.0.0.0.47.91
AIn/a0.0.0.0.0.0.0.0.
less than 10 years ago1.4220.2691.4233.012
11-20 years ago0.4500.2570.7371.325
21-30 years ago0.0.0.0.0.11000.1100
31-40 years ago0.11000.0.0.11000.271
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.3570.0.0.0.0.357
total2.2170.4432.3174.97
ARn/a0.0.0.0.0.0.0.0.
less than 10 years ago3.2150.11001.5244.810
11-20 years ago1.2270.11000.9302.219
21-30 years ago0.0.0.0.0.3580.358
31-40 years ago0.11000.0.0.0.0.1100
41-50 years ago0.2720.0.0.0.0.272
over 50 years ago0.2710.0.0.11000.357
total4.9100.2722.8167.94
BEn/a0.2710.11000.2710.545
less than 10 years ago63.837.41138.45109.62
11-20 years ago11.193.61612.4927.26
21-30 years ago4.3151.5264.81410.69
31-40 years ago1.5260.4502.0223.916
41-50 years ago0.5450.11001.1301.724
over 50 years ago5.6130.8355.41311.89
total87.0313.9864.43165.41
BL/BSn/a0.0.0.0.0.0.0.0.
less than 10 years ago13.160.0.2.22115.35
11-20 years ago2.4200.0.0.9333.316
21-30 years ago0.6410.0.0.3580.933
31-40 years ago0.11000.0.0.0.0.1100
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.6380.0.0.11000.834
total16.940.0.3.51620.42
FRn/a0.0.0.0.0.0.0.0.
less than 10 years ago13.771.2286.11221.05
11-20 years ago5.3130.11004.5149.89
21-30 years ago2.2210.0.1.1303.317
31-40 years ago1.0310.5450.9332.420
41-50 years ago0.0.0.0.0.2710.271
over 50 years ago2.0220.0.1.6253.616
total24.241.82314.5740.42
GEn/a0.11000.0.0.0.0.1100
less than 10 years ago1.0300.0.0.0.1.030
11-20 years ago0.3690.0.0.0.0.369
21-30 years ago1.0320.0.0.0.1.032
31-40 years ago0.6410.0.0.0.0.641
41-50 years ago0.11000.0.0.0.0.1100
over 50 years ago0.3690.0.0.0.0.369
total3.460.0.0.0.3.46
GLn/a0.0.0.0.0.0.0.0.
less than 10 years ago3.7151.0312.7187.59
11-20 years ago0.4501.0310.6412.021
21-30 years ago0.4500.3570.5451.228
31-40 years ago0.11000.4490.4490.932
41-50 years ago0.11000.0.0.2710.358
over 50 years ago1.5250.8350.7373.017
total6.2113.5155.21215.05
GRn/a0.3580.11000.0.0.450
less than 10 years ago23.268.11128.3659.63
11-20 years ago8.5113.61611.1923.26
21-30 years ago4.6152.8199.01016.47
31-40 years ago5.3141.8237.21214.28
41-50 years ago2.3212.2213.7168.311
over 50 years ago14.983.91612.8931.65
total59.1422.6672.03153.71
JUn/a0.0.0.0.0.0.0.0.
less than 10 years ago14.170.3554.91319.35
11-20 years ago5.1130.11002.3207.511
21-30 years ago1.7240.11000.9332.719
31-40 years ago0.6410.0.0.3580.933
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago1.9230.0.1.8243.716
total23.440.54410.2834.12
LUn/a0.0.0.0.0.0.0.0.
less than 10 years ago25.140.3584.11529.53
11-20 years ago5.8120.11001.4257.310
21-30 years ago0.9330.11000.3581.227
31-40 years ago0.6410.0.0.3580.933
41-50 years ago0.4490.0.0.0.0.449
over 50 years ago1.4260.11000.4501.922
total34.130.6416.51141.22
NEn/a0.2700.0.0.0.0.270
less than 10 years ago18.350.7381.92121.04
11-20 years ago4.1150.11000.5454.714
21-30 years ago0.6410.0.0.0.0.641
31-40 years ago0.5450.0.0.2710.738
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.8350.11000.3581.229
total24.530.9332.91728.42
NWn/a0.2710.2690.2700.740
less than 10 years ago1.8220.7392.0214.512
11-20 years ago0.2690.2710.5441.032
21-30 years ago0.11000.2710.0.0.358
31-40 years ago0.3580.0.0.2690.543
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.8370.11000.11001.032
total3.5141.4263.1158.05
OWn/a0.0.0.0.0.0.0.0.
less than 10 years ago4.9130.5453.2178.69
11-20 years ago0.9330.3580.9352.121
21-30 years ago0.4500.2721.2291.823
31-40 years ago1.0330.2710.6411.823
41-50 years ago0.4500.0.0.8351.328
over 50 years ago1.4250.5441.3273.216
total9.181.7238.0918.83
SGn/a0.0.0.0.0.0.0.0.
less than 10 years ago14.671.82413.9730.34
11-20 years ago2.1220.9334.8147.911
21-30 years ago0.6410.4503.0184.016
31-40 years ago0.8350.4501.6242.918
41-50 years ago0.3580.11000.9331.328
over 50 years ago1.5270.4502.5204.415
total19.964.11526.8550.82
SHn/a0.2710.0.0.0.0.271
less than 10 years ago8.660.0.0.4509.06
11-20 years ago1.9210.0.0.11002.021
21-30 years ago0.5450.0.0.0.0.545
31-40 years ago0.4480.0.0.11000.543
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.0.0.0.0.0.0.0.
total11.630.0.0.64012.22
SOn/a0.0.0.0.0.0.0.0.
less than 10 years ago22.540.0.2.12124.63
11-20 years ago3.5160.11000.3583.915
21-30 years ago0.9330.0.0.2701.130
31-40 years ago0.3580.0.0.3580.641
41-50 years ago0.11000.0.0.0.0.1100
over 50 years ago0.7370.11000.2701.031
total28.030.2703.11731.42
SZn/a0.0.0.0.0.0.0.0.
less than 10 years ago7.1110.6406.91114.66
11-20 years ago2.1220.3581.9234.315
21-30 years ago1.2290.4501.8243.417
31-40 years ago0.7370.11000.8351.624
41-50 years ago0.4500.0.0.2710.640
over 50 years ago1.4260.3580.6412.420
total12.971.72412.2726.83
TGn/a0.0.0.0.0.11000.1100
less than 10 years ago14.150.0.1.92116.04
11-20 years ago2.6180.0.0.2702.817
21-30 years ago0.0.0.0.0.2710.271
31-40 years ago0.0.0.0.0.11000.1100
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.3580.0.0.0.0.358
total17.030.0.2.41819.42
TIn/a0.0.0.11000.0.0.1100
less than 10 years ago3.4171.03210.2914.78
11-20 years ago2.8191.7248.61013.18
21-30 years ago2.1221.3289.21012.68
31-40 years ago2.4201.32814.7818.47
41-50 years ago0.6411.1308.71010.49
over 50 years ago7.7113.91626.5638.14
total19.1710.4977.92107.42
URn/a0.0.0.0.0.0.0.0.
less than 10 years ago1.3281.0312.5194.813
11-20 years ago1.1300.8370.6402.519
21-30 years ago0.3580.5440.2711.131
31-40 years ago0.3570.2700.2700.837
41-50 years ago0.2550.3580.2710.835
over 50 years ago2.1221.0311.3294.414
total5.4123.9155.11214.45
VDn/a1.7240.0.0.0.1.724
less than 10 years ago42.141.4275.71349.23
11-20 years ago16.770.6414.01521.36
21-30 years ago4.2150.7382.7197.611
31-40 years ago1.6250.4502.1224.215
41-50 years ago1.5260.0.0.4501.923
over 50 years ago4.9141.1302.1228.111
total72.824.21517.0794.11
VSn/a0.4500.11000.7381.129
less than 10 years ago7.7115.8139.61023.06
11-20 years ago4.8144.9148.31117.97
21-30 years ago3.2175.1148.51016.87
31-40 years ago2.1222.7196.91211.89
41-50 years ago1.0321.1302.4204.515
over 50 years ago10.695.71311.0927.36
total29.8525.3547.34102.42
ZGn/a0.0.0.0.0.0.0.0.
less than 10 years ago2.8140.11002.0194.97
11-20 years ago0.4490.0.0.4490.733
21-30 years ago0.0.0.0.0.0.0.0.
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.11000.0.0.0.0.1100
total3.3120.11002.3165.74
ZHn/a0.0.0.0.0.0.0.0.
less than 10 years ago39.030.0.0.83539.83
11-20 years ago7.2110.0.0.0.7.211
21-30 years ago1.2290.0.0.11001.327
31-40 years ago0.3580.0.0.0.0.358
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago1.1300.0.0.0.1.130
total48.810.0.0.93349.71
Switzerlandn/a3.4170.6401.2295.214
less than 10 years ago389.6132.05152.72574.31
11-20 years ago96.8318.8766.14181.62
21-30 years ago32.4613.7944.6590.63
31-40 years ago21.578.51139.1569.14
41-50 years ago8.3115.01418.9732.25
over 50 years ago62.9418.9768.74150.52
total615.0197.43391.211103.60
© WSL, Swiss National Forest Inventory, 19.06.2020 #853440/319771
NFI1
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: canton
unit: 1000 ha
unit of evaluation: forest
grid: 1.4 x 1.4 km grid
state1983/85
avalanches SilvaProtect
n/ainside perimeteroutside perimetertotal
cantontime of last treatment (classes of 10 years)1000 ha± %1000 ha± %1000 ha± %1000 ha± %
AGn/a0.0.0.0.0.0.0.0.
less than 10 years ago37.040.0.0.0.37.04
11-20 years ago7.0160.0.0.0.7.016
21-30 years ago1.8330.0.0.0.1.833
31-40 years ago0.6580.0.0.0.0.658
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago1.2400.0.0.0.1.240
total47.720.0.0.0.47.72
AIn/a0.0.0.0.0.0.0.0.
less than 10 years ago1.4340.21001.7303.316
11-20 years ago0.6580.4720.3671.235
21-30 years ago0.0.0.0.0.0.0.0.
31-40 years ago0.21000.0.0.21000.471
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.21000.0.0.0.0.2100
total2.3250.6572.2245.19
ARn/a0.0.0.0.0.0.0.0.
less than 10 years ago3.5210.0.1.6325.115
11-20 years ago1.3360.21001.0392.525
21-30 years ago0.0.0.0.0.21000.2100
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.31000.0.0.0.0.3100
over 50 years ago0.21000.0.0.0.0.2100
total5.3130.21002.7228.16
BEn/a4.0220.6580.21004.820
less than 10 years ago63.956.61740.46110.93
11-20 years ago10.8133.52312.71227.08
21-30 years ago4.4211.2415.31910.813
31-40 years ago1.6350.8502.0324.421
41-50 years ago0.6580.0.2.1322.728
over 50 years ago6.4171.0455.71813.112
total91.7313.71268.34173.81
BL/BSn/a0.0.0.0.0.0.0.0.
less than 10 years ago12.490.0.2.42914.87
11-20 years ago1.7340.0.1.1442.827
21-30 years ago0.9500.0.0.4711.341
31-40 years ago0.5700.0.0.0.0.570
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.5670.0.0.0.0.567
total16.160.0.3.92220.03
FRn/a0.8510.0.0.0.0.851
less than 10 years ago14.5100.9445.41820.87
11-20 years ago5.7180.0.5.11810.812
21-30 years ago2.5290.0.0.4722.926
31-40 years ago1.2410.21000.9502.330
41-50 years ago0.0.0.0.0.21000.2100
over 50 years ago2.3300.0.1.2413.524
total27.251.04013.11041.43
GEn/a0.0.0.0.0.0.0.0.
less than 10 years ago0.8660.0.0.0.0.866
11-20 years ago0.41000.0.0.0.0.4100
21-30 years ago0.8660.0.0.0.0.866
31-40 years ago1.2500.0.0.0.1.250
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.0.0.0.0.0.0.0.
total3.1130.0.0.0.3.113
GLn/a1.7330.0.0.9492.627
less than 10 years ago3.4220.8503.3237.513
11-20 years ago0.6581.1390.6572.328
21-30 years ago0.4710.6570.8501.832
31-40 years ago0.0.0.4710.4710.850
41-50 years ago0.21000.0.0.0.0.2100
over 50 years ago0.6581.2400.4712.129
total6.8154.1206.31517.15
GRn/a17.1111.2412.13020.410
less than 10 years ago23.898.31526.8858.95
11-20 years ago7.1163.72312.11223.09
21-30 years ago5.7182.42910.41318.610
31-40 years ago5.4191.4387.11613.911
41-50 years ago2.0321.7333.3247.016
over 50 years ago16.2114.22113.01233.47
total77.4422.9974.94175.22
JUn/a0.0.0.0.0.0.0.0.
less than 10 years ago14.390.5524.51919.37
11-20 years ago4.7190.21002.7267.615
21-30 years ago1.9310.21000.8502.925
31-40 years ago0.21000.0.0.6580.850
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago1.2410.0.2.2293.323
total22.460.94310.71134.03
LUn/a0.21000.0.0.21000.471
less than 10 years ago25.660.4714.02230.05
11-20 years ago5.0190.21002.1317.216
21-30 years ago1.2400.0.0.21001.438
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.9490.0.0.0.0.949
over 50 years ago1.4380.21000.6572.230
total34.340.8507.01542.12
NEn/a0.21000.0.0.21000.370
less than 10 years ago17.771.0442.32721.06
11-20 years ago4.2200.0.0.21004.420
21-30 years ago0.8510.0.0.0.0.851
31-40 years ago0.9510.0.0.21001.145
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.4700.0.0.4720.851
total24.151.0443.22228.33
NWn/a0.5710.0.0.0.0.571
less than 10 years ago2.0320.4721.8344.318
11-20 years ago0.0.0.4720.7561.144
21-30 years ago0.0.0.0.0.0.0.0.
31-40 years ago0.4720.0.0.4670.848
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago1.0490.31000.0.1.243
total3.9201.2442.8247.98
OWn/a0.21000.21000.0.0.471
less than 10 years ago4.3190.5602.9247.713
11-20 years ago1.4370.11001.0452.626
21-30 years ago0.6580.21001.1421.932
31-40 years ago1.0440.5710.4721.833
41-50 years ago0.7580.0.0.9481.536
over 50 years ago1.3370.3721.5343.122
total9.5121.9317.81319.14
SGn/a1.2410.0.0.9502.132
less than 10 years ago15.0101.73513.61030.26
11-20 years ago2.9271.3414.9209.114
21-30 years ago1.0450.4712.7274.122
31-40 years ago1.4380.9501.8334.022
41-50 years ago0.0.0.0.1.5381.538
over 50 years ago2.0330.21002.9275.120
total23.484.52128.3656.33
SHn/a0.21000.0.0.0.0.2100
less than 10 years ago10.160.0.0.210010.36
11-20 years ago0.9410.0.0.21001.137
21-30 years ago0.4710.0.0.0.0.471
31-40 years ago0.21000.0.0.0.0.2100
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.0.0.0.0.0.0.0.
total11.940.0.0.46912.33
SOn/a0.0.0.0.0.0.0.0.
less than 10 years ago24.350.0.1.73326.04
11-20 years ago2.9240.0.0.21003.123
21-30 years ago1.1410.0.0.5701.636
31-40 years ago0.21000.0.0.5700.758
41-50 years ago0.21000.0.0.0.0.2100
over 50 years ago0.3710.21000.0.0.557
total29.130.21002.92632.12
SZn/a0.21000.0.0.21000.471
less than 10 years ago7.3150.5586.11614.09
11-20 years ago2.4280.6571.3374.320
21-30 years ago1.6350.21001.8323.523
31-40 years ago0.8500.0.1.1401.930
41-50 years ago0.6580.0.0.0.0.658
over 50 years ago2.4280.6580.8503.822
total15.391.93111.31128.53
TGn/a0.0.0.0.0.0.0.0.
less than 10 years ago14.270.0.2.02816.15
11-20 years ago2.6250.0.0.21002.824
21-30 years ago0.0.0.0.0.21000.2100
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.6590.0.0.0.0.659
total17.350.0.2.42619.73
TIn/a9.3141.24112.81223.39
less than 10 years ago3.6230.65810.91315.111
11-20 years ago3.2251.4388.81513.412
21-30 years ago2.2301.2418.21511.613
31-40 years ago1.9330.47015.21117.410
41-50 years ago1.2410.47110.01411.613
over 50 years ago8.1153.92227.3839.46
total29.589.01493.33131.82
URn/a3.0250.4711.0454.321
less than 10 years ago1.5350.7482.7255.017
11-20 years ago1.2400.8490.4692.426
21-30 years ago0.4710.6560.0.1.043
31-40 years ago0.4720.21000.21000.850
41-50 years ago0.4670.21000.0.0.652
over 50 years ago1.8311.0451.6344.418
total8.6133.8206.01618.45
VDn/a2.8260.21000.4713.424
less than 10 years ago39.061.8335.11945.95
11-20 years ago17.5101.0453.52322.08
21-30 years ago4.3210.8502.7267.915
31-40 years ago2.0310.8501.6354.321
41-50 years ago1.4370.0.0.6582.031
over 50 years ago4.5211.0452.1307.616
total71.535.51816.01093.02
VSn/a7.3170.6581.5359.414
less than 10 years ago6.6174.62010.21321.49
11-20 years ago4.8204.52010.41319.79
21-30 years ago3.7235.4189.41418.510
31-40 years ago2.2302.0318.21512.412
41-50 years ago1.3381.0452.7265.019
over 50 years ago9.9146.21713.71129.97
total35.8724.3856.24116.32
ZGn/a0.0.0.0.0.0.0.0.
less than 10 years ago2.4230.21001.8284.412
11-20 years ago0.21000.0.0.7460.943
21-30 years ago0.0.0.0.0.0.0.0.
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.21000.0.0.0.0.2100
total2.9190.21002.5205.57
ZHn/a0.0.0.0.0.0.0.0.
less than 10 years ago39.240.0.1.53740.63
11-20 years ago6.5170.0.0.0.6.517
21-30 years ago1.5380.0.0.21001.735
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago1.4370.0.0.0.1.437
total48.520.0.1.63550.22
Switzerlandn/a48.864.42120.41073.55
less than 10 years ago388.0229.88152.73570.51
11-20 years ago95.7419.51070.25185.43
21-30 years ago37.2713.11245.3695.64
31-40 years ago22.2107.41640.6770.25
41-50 years ago9.6143.22421.31034.27
over 50 years ago64.0520.31073.35157.63
total665.6197.74423.821187.01
© WSL, Swiss National Forest Inventory, 19.06.2020 #853441/319772
NFI1
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: canton
unit: 1000 ha
unit of evaluation: forest
grid: terrestrial grid NFI1
state1983/85
avalanches SilvaProtect
n/ainside perimeteroutside perimetertotal
cantontime of last treatment (classes of 10 years)1000 ha± %1000 ha± %1000 ha± %1000 ha± %
AGn/a0.0.0.0.0.0.0.0.
less than 10 years ago38.830.0.0.0.38.83
11-20 years ago6.3120.0.0.0.6.312
21-30 years ago1.5260.0.0.0.1.526
31-40 years ago0.6410.0.0.0.0.641
41-50 years ago0.11000.0.0.0.0.1100
over 50 years ago0.8350.0.0.0.0.835
total48.010.0.0.0.48.01
AIn/a0.11000.0.0.0.0.1100
less than 10 years ago1.4220.2691.4233.012
11-20 years ago0.5450.2570.7371.424
21-30 years ago0.0.0.0.0.11000.1100
31-40 years ago0.11000.0.0.11000.271
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.3570.0.0.0.0.357
total2.4170.4432.3175.17
ARn/a0.0.0.0.0.0.0.0.
less than 10 years ago3.2150.11001.5244.810
11-20 years ago1.2270.11000.9302.219
21-30 years ago0.0.0.0.0.3580.358
31-40 years ago0.11000.0.0.0.0.1100
41-50 years ago0.2720.0.0.0.0.272
over 50 years ago0.2710.0.0.11000.357
total4.9100.2722.8167.94
BEn/a3.7160.4500.2714.315
less than 10 years ago64.337.41138.85110.42
11-20 years ago11.193.61612.6927.46
21-30 years ago4.5151.5264.81410.99
31-40 years ago1.6250.4502.0224.016
41-50 years ago0.5450.11001.3281.923
over 50 years ago6.7120.9336.31214.08
total92.4214.3866.13172.91
BL/BSn/a0.0.0.0.0.0.0.0.
less than 10 years ago13.160.0.2.22115.35
11-20 years ago2.4200.0.0.9333.316
21-30 years ago0.6410.0.0.3580.933
31-40 years ago0.2700.0.0.0.0.270
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.6380.0.0.11000.834
total17.040.0.3.51620.52
FRn/a0.5450.0.0.11000.641
less than 10 years ago13.871.2286.11221.15
11-20 years ago5.3130.11004.5149.89
21-30 years ago2.2210.0.1.2283.417
31-40 years ago1.0310.5450.9332.420
41-50 years ago0.0.0.0.0.2710.271
over 50 years ago2.1220.0.1.6253.716
total24.841.82314.7741.32
GEn/a0.11000.0.0.0.0.1100
less than 10 years ago1.0300.0.0.0.1.030
11-20 years ago0.3690.0.0.0.0.369
21-30 years ago1.0320.0.0.0.1.032
31-40 years ago0.6410.0.0.0.0.641
41-50 years ago0.11000.0.0.0.0.1100
over 50 years ago0.3690.0.0.0.0.369
total3.460.0.0.0.3.46
GLn/a1.6240.2700.5442.320
less than 10 years ago3.7151.0312.7187.59
11-20 years ago0.4501.0310.6412.021
21-30 years ago0.4500.3570.5451.228
31-40 years ago0.11000.4490.5441.031
41-50 years ago0.11000.0.0.2710.358
over 50 years ago1.5250.9330.8353.217
total7.8103.8155.91117.64
GRn/a15.781.1302.81919.77
less than 10 years ago23.368.21128.4659.93
11-20 years ago8.6113.61611.2923.46
21-30 years ago4.7142.9189.21016.87
31-40 years ago5.6131.9237.41114.88
41-50 years ago2.3212.2213.8168.411
over 50 years ago16.383.91614.1834.35
total76.5323.9676.93177.21
JUn/a0.0.0.0.0.0.0.0.
less than 10 years ago14.170.3554.91319.35
11-20 years ago5.1130.11002.3207.511
21-30 years ago1.7240.11000.9332.719
31-40 years ago0.6410.0.0.3580.933
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago2.0220.0.1.8243.716
total23.540.54410.2834.22
LUn/a0.11000.0.0.11000.271
less than 10 years ago25.140.3584.11529.53
11-20 years ago5.9120.11001.4257.510
21-30 years ago0.9310.11000.3581.326
31-40 years ago0.6410.0.0.3580.933
41-50 years ago0.4490.0.0.0.0.449
over 50 years ago1.7230.11000.4502.221
total34.830.6416.61141.92
NEn/a0.2700.11000.11000.449
less than 10 years ago18.350.7381.92121.04
11-20 years ago4.1150.11000.5454.714
21-30 years ago0.6410.0.0.0.0.641
31-40 years ago0.5450.0.0.2710.738
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.8350.11000.3581.229
total24.531.0313.01728.52
NWn/a0.3580.2690.2700.837
less than 10 years ago1.9220.7392.0214.611
11-20 years ago0.2690.2710.5441.032
21-30 years ago0.11000.2710.0.0.358
31-40 years ago0.3580.0.0.2690.543
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.8370.11000.11001.032
total3.7141.4263.1158.25
OWn/a0.3580.11000.0.0.450
less than 10 years ago4.9130.5453.2178.69
11-20 years ago0.9330.3580.9352.121
21-30 years ago0.4500.2721.2291.823
31-40 years ago1.0330.2710.7381.923
41-50 years ago0.4500.0.0.8351.328
over 50 years ago1.4250.5441.3273.216
total9.481.8238.1919.33
SGn/a1.1300.0.1.0332.122
less than 10 years ago14.771.82413.9730.44
11-20 years ago2.1220.9334.9148.011
21-30 years ago0.6410.4503.1184.115
31-40 years ago0.8350.6412.1223.516
41-50 years ago0.3580.11001.0311.427
over 50 years ago1.6260.6413.0185.214
total21.264.51529.0454.72
SHn/a0.2710.0.0.0.0.271
less than 10 years ago8.660.0.0.4509.06
11-20 years ago1.9210.0.0.11002.021
21-30 years ago0.5450.0.0.0.0.545
31-40 years ago0.4480.0.0.11000.543
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.0.0.0.0.0.0.0.
total11.630.0.0.64012.22
SOn/a0.0.0.0.0.0.0.0.
less than 10 years ago22.540.0.2.22124.73
11-20 years ago3.6150.11000.3584.015
21-30 years ago0.9330.0.0.2701.130
31-40 years ago0.3580.0.0.3580.641
41-50 years ago0.11000.0.0.0.0.1100
over 50 years ago0.7370.11000.2701.031
total28.130.2703.31731.62
SZn/a0.11000.0.0.2710.357
less than 10 years ago7.1110.7376.91114.76
11-20 years ago2.1220.3581.9234.315
21-30 years ago1.2290.4501.8243.417
31-40 years ago0.7370.11000.8351.624
41-50 years ago0.4500.0.0.2710.640
over 50 years ago1.9220.3580.7383.018
total13.571.82312.6727.92
TGn/a0.0.0.0.0.11000.1100
less than 10 years ago14.150.0.1.92116.04
11-20 years ago2.6180.0.0.2702.817
21-30 years ago0.0.0.0.0.2710.271
31-40 years ago0.0.0.0.0.11000.1100
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.3580.0.0.0.0.358
total17.030.0.2.41819.42
TIn/a9.5101.03212.1922.76
less than 10 years ago3.4171.03210.3914.88
11-20 years ago2.9181.7248.71013.38
21-30 years ago2.1221.3289.21012.68
31-40 years ago2.7191.32815.2819.27
41-50 years ago0.8351.1308.91010.89
over 50 years ago8.8103.91627.9540.64
total30.3511.3992.42134.01
URn/a3.3170.5451.2295.014
less than 10 years ago1.4271.0312.5194.913
11-20 years ago1.1300.8370.6402.519
21-30 years ago0.3580.5440.2711.131
31-40 years ago0.3570.2700.2700.837
41-50 years ago0.2550.3580.2710.835
over 50 years ago2.3201.0311.3294.614
total9.094.4146.31119.74
VDn/a2.5200.3580.3583.118
less than 10 years ago42.141.4275.71349.23
11-20 years ago16.770.6414.01521.36
21-30 years ago4.2150.7382.7197.611
31-40 years ago1.6250.4502.1224.215
41-50 years ago1.5260.0.0.4501.923
over 50 years ago5.2141.2292.1228.511
total73.824.61417.3795.81
VSn/a7.5110.5452.02210.010
less than 10 years ago7.8115.8139.91023.46
11-20 years ago5.0144.9148.61018.47
21-30 years ago3.3175.2148.71017.27
31-40 years ago2.1222.7197.11212.09
41-50 years ago1.0321.2292.4204.614
over 50 years ago11.996.11311.8929.85
total38.6526.3550.53115.41
ZGn/a0.0.0.0.0.0.0.0.
less than 10 years ago2.8140.11002.0194.97
11-20 years ago0.4490.0.0.4490.733
21-30 years ago0.0.0.0.0.0.0.0.
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.11000.0.0.0.0.1100
total3.3120.11002.3165.74
ZHn/a0.0.0.0.0.0.0.0.
less than 10 years ago39.130.0.0.83539.93
11-20 years ago7.2110.0.0.0.7.211
21-30 years ago1.2290.0.0.11001.327
31-40 years ago0.3580.0.0.0.0.358
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago1.1300.0.0.0.1.130
total48.910.0.0.93349.81
Switzerlandn/a46.854.41521.0772.34
less than 10 years ago390.8132.25153.62576.71
11-20 years ago97.6318.8766.94183.32
21-30 years ago33.0513.9845.2592.13
31-40 years ago22.378.81140.6571.74
41-50 years ago8.5115.11419.5733.15
over 50 years ago69.5419.8773.93163.22
total668.61102.93420.611192.20
© WSL, Swiss National Forest Inventory, 19.06.2020 #853442/319773
NFI2
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: canton
unit: 1000 ha
unit of evaluation: accessible forest without shrub forest NFI1/NFI2/NFI3/NFI4
grid: 1.4 x 1.4 km grid
state1993/95
avalanches SilvaProtect
n/ainside perimeteroutside perimetertotal
cantontime of last treatment (classes of 10 years)1000 ha± %1000 ha± %1000 ha± %1000 ha± %
AGn/a0.0.0.0.0.0.0.0.
less than 10 years ago34.440.0.0.0.34.44
11-20 years ago8.2140.0.0.0.8.214
21-30 years ago2.0310.0.0.0.2.031
31-40 years ago0.8500.0.0.0.0.850
41-50 years ago0.6580.0.0.0.0.658
over 50 years ago0.6580.0.0.0.0.658
total46.720.0.0.0.46.72
AIn/a0.0.0.0.0.0.0.0.
less than 10 years ago0.4680.21000.9421.531
11-20 years ago0.9420.0.1.0431.927
21-30 years ago0.6580.4720.21001.139
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.21000.0.0.21000.471
over 50 years ago0.21000.0.0.0.0.2100
total2.3250.6572.2245.19
ARn/a0.0.0.0.0.0.0.0.
less than 10 years ago2.9220.21001.1414.117
11-20 years ago1.5350.0.1.0392.525
21-30 years ago0.5670.0.0.5551.044
31-40 years ago0.0.0.0.0.21000.2100
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.4730.0.0.0.0.473
total5.3130.21002.7228.16
BEn/a0.0.0.0.0.0.0.0.
less than 10 years ago49.455.02030.6785.04
11-20 years ago20.993.62317.31041.86
21-30 years ago5.8182.2307.11615.011
31-40 years ago2.4290.8503.7236.817
41-50 years ago1.4380.4711.4383.225
over 50 years ago3.6230.8504.8209.214
total83.5412.71264.94161.11
BL/BSn/a0.0.0.0.0.0.0.0.
less than 10 years ago7.9140.0.1.4409.212
11-20 years ago5.5170.0.1.7347.114
21-30 years ago0.9510.0.0.4711.341
31-40 years ago0.9500.0.0.4711.341
41-50 years ago0.21000.0.0.0.0.2100
over 50 years ago0.31000.0.0.0.0.3100
total15.760.0.3.92219.64
FRn/a0.0.0.0.0.0.0.0.
less than 10 years ago13.9100.5574.91919.38
11-20 years ago6.1180.5573.0259.613
21-30 years ago2.2310.0.3.0225.218
31-40 years ago1.6350.0.0.4722.032
41-50 years ago0.8500.0.0.5711.341
over 50 years ago1.3410.0.1.0452.330
total25.951.04012.81039.73
GEn/a0.0.0.0.0.0.0.0.
less than 10 years ago1.2500.0.0.0.1.250
11-20 years ago0.0.0.0.0.0.0.0.
21-30 years ago0.41000.0.0.0.0.4100
31-40 years ago0.41000.0.0.0.0.4100
41-50 years ago1.2500.0.0.0.1.250
over 50 years ago0.0.0.0.0.0.0.0.
total3.1130.0.0.0.3.113
GLn/a0.0.0.0.0.0.0.0.
less than 10 years ago1.6351.3361.8324.718
11-20 years ago1.9290.6581.5344.019
21-30 years ago0.4710.6570.4711.437
31-40 years ago0.4710.4710.8501.634
41-50 years ago0.0.0.4710.21000.657
over 50 years ago0.6580.6580.4711.534
total4.9183.8205.11713.87
GRn/a0.4710.0.0.0.0.471
less than 10 years ago17.1105.11922.7944.96
11-20 years ago12.6125.21914.61132.47
21-30 years ago4.8202.7277.21614.711
31-40 years ago3.6232.0327.11612.612
41-50 years ago2.4291.0455.7189.214
over 50 years ago13.3124.62012.41230.37
total54.2520.7969.64144.52
JUn/a0.0.0.0.0.0.0.0.
less than 10 years ago9.6130.4713.92113.910
11-20 years ago8.0140.3672.92411.311
21-30 years ago2.3280.21001.4373.921
31-40 years ago1.0440.0.0.6571.635
41-50 years ago0.21000.0.0.6580.850
over 50 years ago0.21000.0.1.2401.437
total21.360.94310.51132.83
LUn/a0.0.0.0.0.0.0.0.
less than 10 years ago16.880.0.3.12519.87
11-20 years ago10.4120.4712.22913.010
21-30 years ago3.1250.21001.0444.221
31-40 years ago0.6570.0.0.21000.850
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago1.1440.0.0.4711.537
total31.940.6586.81639.43
NEn/a0.0.0.0.0.0.0.0.
less than 10 years ago16.771.0442.12819.86
11-20 years ago4.8190.0.0.21005.019
21-30 years ago1.3410.0.0.0.1.341
31-40 years ago0.4710.0.0.0.0.471
41-50 years ago0.31000.0.0.21000.572
over 50 years ago0.0.0.0.0.4720.472
total23.451.0442.82427.33
NWn/a0.0.0.0.0.0.0.0.
less than 10 years ago1.8330.9491.5374.219
11-20 years ago0.5710.0.0.7591.243
21-30 years ago0.0.0.0.0.0.0.0.
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.21000.0.0.4670.552
over 50 years ago1.0490.31000.0.1.243
total3.5211.2442.6267.29
OWn/a0.0.0.0.0.0.0.0.
less than 10 years ago3.4230.3723.0256.714
11-20 years ago2.3270.4741.4374.119
21-30 years ago1.0450.11000.8502.031
31-40 years ago0.4700.21000.4711.144
41-50 years ago0.4710.5710.21001.144
over 50 years ago1.6350.11001.5353.223
total9.1121.7337.41318.14
SGn/a0.0.0.0.0.0.0.0.
less than 10 years ago11.0131.0459.21421.28
11-20 years ago5.5181.7357.21514.310
21-30 years ago0.8500.7582.3293.823
31-40 years ago0.4710.21002.0312.728
41-50 years ago1.1410.5711.0452.627
over 50 years ago1.3410.21002.6284.222
total20.194.42124.3748.84
SHn/a0.0.0.0.0.0.0.0.
less than 10 years ago7.7110.0.0.0.7.711
11-20 years ago3.8200.0.0.21004.019
21-30 years ago0.0.0.0.0.21000.2100
31-40 years ago0.21000.0.0.0.0.2100
41-50 years ago0.21000.0.0.0.0.2100
over 50 years ago0.0.0.0.0.0.0.0.
total11.940.0.0.46912.33
SOn/a0.0.0.0.0.0.0.0.
less than 10 years ago18.570.0.1.04519.57
11-20 years ago7.6150.0.1.0458.514
21-30 years ago1.0390.0.0.21001.236
31-40 years ago0.8510.0.0.5701.341
41-50 years ago0.0.0.0.0.21000.2100
over 50 years ago0.6590.21000.0.0.850
total28.530.21002.92631.62
SZn/a0.0.0.0.0.0.0.0.
less than 10 years ago6.6160.6583.62310.711
11-20 years ago2.2300.21003.5235.817
21-30 years ago1.4380.21001.1402.726
31-40 years ago1.0450.0.1.2392.229
41-50 years ago0.8500.0.0.8501.634
over 50 years ago1.5350.4710.6582.527
total13.5101.43710.71125.54
TGn/a0.0.0.0.0.0.0.0.
less than 10 years ago11.290.0.2.02813.27
11-20 years ago5.0170.0.0.4735.316
21-30 years ago0.7520.0.0.0.0.752
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.3720.0.0.0.0.372
total17.250.0.2.42619.63
TIn/a0.21000.0.0.0.0.2100
less than 10 years ago2.7281.0446.41810.014
11-20 years ago1.4380.4718.1159.914
21-30 years ago1.2411.4387.31610.014
31-40 years ago2.2301.0457.91611.013
41-50 years ago1.7350.210013.21215.011
over 50 years ago7.0164.12132.7743.76
total16.3108.01575.6399.92
URn/a0.0.0.0.0.0.0.0.
less than 10 years ago1.2401.3362.2284.718
11-20 years ago0.7490.21001.0441.930
21-30 years ago1.2400.8490.21002.228
31-40 years ago0.0.0.6560.0.0.656
41-50 years ago0.4720.21000.0.0.658
over 50 years ago1.3370.4711.2402.924
total4.8183.5214.61812.96
VDn/a0.0.0.0.0.0.0.0.
less than 10 years ago35.162.4296.11843.65
11-20 years ago15.5101.2412.52719.39
21-30 years ago9.4140.4711.93111.812
31-40 years ago2.2300.4711.2413.723
41-50 years ago1.2410.4701.2412.726
over 50 years ago4.0220.21002.3296.517
total67.535.01915.21087.72
VSn/a0.0.0.0.0.4710.471
less than 10 years ago5.9185.01910.01321.09
11-20 years ago3.6233.5236.91614.011
21-30 years ago3.4242.9257.61614.011
31-40 years ago2.3304.0217.01613.411
41-50 years ago1.5351.6356.6179.714
over 50 years ago7.7165.81813.01226.68
total24.5822.9851.6599.02
ZGn/a0.0.0.0.0.0.0.0.
less than 10 years ago2.3240.21001.3323.815
11-20 years ago0.4720.0.0.6571.044
21-30 years ago0.0.0.0.0.4670.467
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.21000.0.0.0.0.2100
total2.9190.21002.3225.48
ZHn/a0.0.0.0.0.0.0.0.
less than 10 years ago34.940.0.1.24136.24
11-20 years ago8.6140.0.0.21008.814
21-30 years ago2.6280.0.0.0.2.628
31-40 years ago0.7570.0.0.21000.850
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.4700.0.0.0.0.470
total47.120.0.1.63548.82
Switzerlandn/a0.6580.0.0.4710.945
less than 10 years ago314.1226.38120.14460.52
11-20 years ago138.0418.21079.05235.23
21-30 years ago46.9612.81243.17102.84
31-40 years ago22.2109.61433.7865.55
41-50 years ago14.9125.12032.3852.36
over 50 years ago48.5617.81074.35140.63
total585.2189.84382.821057.81
© WSL, Swiss National Forest Inventory, 19.06.2020 #853443/319774
NFI2
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: canton
unit: 1000 ha
unit of evaluation: accessible forest without shrub forest
grid: 1.4 x 1.4 km grid
state1993/95
avalanches SilvaProtect
n/ainside perimeteroutside perimetertotal
cantontime of last treatment (classes of 10 years)1000 ha± %1000 ha± %1000 ha± %1000 ha± %
AGn/a0.21000.0.0.0.0.2100
less than 10 years ago35.040.0.0.0.35.04
11-20 years ago8.4140.0.0.0.8.414
21-30 years ago2.0310.0.0.0.2.031
31-40 years ago1.0440.0.0.0.1.044
41-50 years ago0.6580.0.0.0.0.658
over 50 years ago0.8500.0.0.0.0.850
total48.120.0.0.0.48.12
AIn/a0.0.0.0.0.0.0.0.
less than 10 years ago0.4680.21000.9421.531
11-20 years ago0.9420.0.1.0431.927
21-30 years ago0.6580.4720.21001.139
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.21000.0.0.21000.471
over 50 years ago0.21000.0.0.0.0.2100
total2.3250.6572.2245.19
ARn/a0.0.0.0.0.0.0.0.
less than 10 years ago2.9220.21001.1414.117
11-20 years ago1.5350.0.1.0392.525
21-30 years ago0.5670.0.0.5551.044
31-40 years ago0.0.0.0.0.21000.2100
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.4730.0.0.0.0.473
total5.3130.21002.7228.16
BEn/a1.0450.0.0.21001.241
less than 10 years ago50.455.02031.8787.24
11-20 years ago21.393.82317.81042.86
21-30 years ago6.0182.2307.11615.211
31-40 years ago2.7270.8504.1227.616
41-50 years ago1.4380.4711.6353.424
over 50 years ago4.8200.8504.82010.414
total87.7412.91267.34167.91
BL/BSn/a0.0.0.0.0.0.0.0.
less than 10 years ago8.2130.0.1.6379.911
11-20 years ago5.5170.0.1.7347.114
21-30 years ago0.9510.0.0.4711.341
31-40 years ago0.9500.0.0.4711.341
41-50 years ago0.21000.0.0.0.0.2100
over 50 years ago0.31000.0.0.0.0.3100
total16.160.0.4.12120.23
FRn/a0.21000.0.0.0.0.2100
less than 10 years ago14.7100.5575.11920.38
11-20 years ago6.3170.5573.0259.813
21-30 years ago2.2310.0.3.2215.418
31-40 years ago1.6350.0.0.4722.032
41-50 years ago0.8500.0.0.7581.538
over 50 years ago1.3410.0.1.2412.529
total27.151.04013.51041.73
GEn/a0.41000.0.0.0.0.4100
less than 10 years ago1.2500.0.0.0.1.250
11-20 years ago0.0.0.0.0.0.0.0.
21-30 years ago0.41000.0.0.0.0.4100
31-40 years ago0.41000.0.0.0.0.4100
41-50 years ago1.2500.0.0.0.1.250
over 50 years ago0.0.0.0.0.0.0.0.
total3.520.0.0.0.3.52
GLn/a0.21000.0.0.0.0.2100
less than 10 years ago2.0311.3362.0305.217
11-20 years ago1.9290.6581.5344.019
21-30 years ago0.4710.6570.4711.437
31-40 years ago0.4710.4710.8501.634
41-50 years ago0.0.0.4710.21000.657
over 50 years ago0.8500.8500.4711.931
total5.7174.0205.21714.96
GRn/a1.2410.0.1.4382.628
less than 10 years ago18.5105.31923.7947.66
11-20 years ago14.0115.41916.21135.67
21-30 years ago6.2182.7277.41616.311
31-40 years ago4.3212.2307.51614.011
41-50 years ago3.1261.0455.91810.014
over 50 years ago16.7105.01915.11136.97
total64.1521.7977.24162.92
JUn/a0.4710.0.0.0.0.471
less than 10 years ago9.8120.4713.92114.110
11-20 years ago8.2140.3672.92411.511
21-30 years ago2.3280.21001.4373.921
31-40 years ago1.0440.0.0.6571.635
41-50 years ago0.21000.0.0.6580.850
over 50 years ago0.21000.0.1.4371.635
total22.160.94310.71133.73
LUn/a0.21000.0.0.0.0.2100
less than 10 years ago17.280.0.3.12520.27
11-20 years ago10.6120.4712.22913.210
21-30 years ago3.4240.21001.0444.620
31-40 years ago0.6570.0.0.21000.850
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago1.5370.0.0.6582.131
total33.540.6587.01641.22
NEn/a0.21000.0.0.0.0.2100
less than 10 years ago16.971.0442.32720.26
11-20 years ago5.1190.0.0.21005.218
21-30 years ago1.4380.0.0.0.1.438
31-40 years ago0.4710.0.0.0.0.471
41-50 years ago0.31000.0.0.21000.572
over 50 years ago0.0.0.0.0.4720.472
total24.251.0443.02328.33
NWn/a0.0.0.0.0.0.0.0.
less than 10 years ago1.8330.9491.5374.219
11-20 years ago0.8560.0.0.7591.539
21-30 years ago0.0.0.0.0.0.0.0.
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.21000.0.0.4670.552
over 50 years ago1.4390.31000.0.1.736
total4.3181.2442.6268.08
OWn/a0.21000.0.0.0.0.2100
less than 10 years ago3.6220.3723.0256.914
11-20 years ago2.3270.4741.4374.119
21-30 years ago1.0450.11000.8502.031
31-40 years ago0.6570.21000.7561.537
41-50 years ago0.4710.5710.21001.144
over 50 years ago1.8330.11001.5353.422
total9.9111.7337.61319.14
SGn/a0.7580.0.0.21000.950
less than 10 years ago11.6121.04510.01322.68
11-20 years ago6.1171.7357.41515.210
21-30 years ago1.0450.7583.0264.721
31-40 years ago0.4710.21002.0312.728
41-50 years ago1.1410.5711.0452.627
over 50 years ago2.2310.21003.4245.918
total23.184.42127.1754.53
SHn/a0.0.0.0.0.0.0.0.
less than 10 years ago7.7110.0.0.0.7.711
11-20 years ago3.8200.0.0.21004.019
21-30 years ago0.0.0.0.0.21000.2100
31-40 years ago0.21000.0.0.0.0.2100
41-50 years ago0.21000.0.0.0.0.2100
over 50 years ago0.0.0.0.0.0.0.0.
total11.940.0.0.46912.33
SOn/a0.0.0.0.0.0.0.0.
less than 10 years ago18.970.0.1.04519.97
11-20 years ago7.7140.0.1.0458.713
21-30 years ago1.2360.0.0.21001.433
31-40 years ago0.8510.0.0.5701.341
41-50 years ago0.0.0.0.0.21000.2100
over 50 years ago0.6590.21000.0.0.850
total29.330.21002.92632.32
SZn/a0.0.0.0.0.0.0.0.
less than 10 years ago6.8150.7503.72211.211
11-20 years ago2.6270.21003.5236.217
21-30 years ago1.6350.21001.1402.925
31-40 years ago1.0450.21001.4372.627
41-50 years ago0.8500.0.1.0451.833
over 50 years ago1.5350.4710.8502.726
total14.391.73211.51127.54
TGn/a0.11000.0.0.0.0.1100
less than 10 years ago11.390.0.2.02813.47
11-20 years ago5.0170.0.0.4735.316
21-30 years ago0.7520.0.0.0.0.752
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.3720.0.0.0.0.372
total17.550.0.2.42619.93
TIn/a0.21000.0.0.8501.045
less than 10 years ago3.1261.2407.51611.813
11-20 years ago2.9260.4718.51511.813
21-30 years ago1.6351.4387.51610.613
31-40 years ago2.4291.0457.91611.213
41-50 years ago2.0320.210013.81116.010
over 50 years ago8.5154.52134.8747.85
total20.798.61480.83110.12
URn/a0.4710.0.0.0.0.471
less than 10 years ago1.8311.3362.4275.516
11-20 years ago0.7490.21001.0441.930
21-30 years ago1.2401.0440.4712.626
31-40 years ago0.0.0.6560.0.0.656
41-50 years ago0.4720.21000.0.0.658
over 50 years ago1.5340.4711.4373.322
total6.0153.7215.11714.85
VDn/a0.8500.0.0.0.0.850
less than 10 years ago37.262.5276.31746.05
11-20 years ago16.1101.2412.52719.99
21-30 years ago9.6140.4711.93111.912
31-40 years ago2.8260.4711.3384.521
41-50 years ago1.6350.4701.2413.125
over 50 years ago5.2190.4712.5278.115
total73.335.31915.81094.52
VSn/a0.8500.0.0.6581.438
less than 10 years ago6.5175.01910.61322.29
11-20 years ago4.8203.9227.31616.010
21-30 years ago4.0223.1258.11515.211
31-40 years ago2.7274.0217.01613.811
41-50 years ago2.0311.6356.61710.213
over 50 years ago7.9165.81813.41227.28
total28.8723.5853.65105.92
ZGn/a0.0.0.0.0.0.0.0.
less than 10 years ago2.3240.21001.3323.815
11-20 years ago0.4720.0.0.8471.139
21-30 years ago0.0.0.0.0.4670.467
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.21000.0.0.0.0.2100
total2.9190.21002.5205.57
ZHn/a0.0.0.0.0.0.0.0.
less than 10 years ago36.040.0.1.24137.24
11-20 years ago8.8140.0.0.21009.014
21-30 years ago2.6280.0.0.0.2.628
31-40 years ago0.7570.0.0.21000.850
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.4700.0.0.0.0.470
total48.420.0.1.63550.01
Switzerlandn/a7.1170.0.3.22510.314
less than 10 years ago325.8227.08126.34479.02
11-20 years ago145.8319.01082.25247.03
21-30 years ago50.9613.21244.96109.04
31-40 years ago25.0910.01435.1770.15
41-50 years ago16.7115.12033.7755.46
over 50 years ago58.6619.01081.65159.23
total629.9193.34406.921130.11
© WSL, Swiss National Forest Inventory, 19.06.2020 #853444/319775
NFI2
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: canton
unit: 1000 ha
unit of evaluation: accessible forest without shrub forest
grid: terrestrial grid NFI2
state1993/95
avalanches SilvaProtect
n/ainside perimeteroutside perimetertotal
cantontime of last treatment (classes of 10 years)1000 ha± %1000 ha± %1000 ha± %1000 ha± %
AGn/a2.1280.0.0.0.2.128
less than 10 years ago33.940.0.0.0.33.94
11-20 years ago7.6140.0.0.0.7.614
21-30 years ago1.8310.0.0.0.1.831
31-40 years ago0.9440.0.0.0.0.944
41-50 years ago0.5580.0.0.0.0.558
over 50 years ago0.7500.0.0.0.0.750
total47.620.0.0.0.47.62
AIn/a0.21000.0.0.3710.557
less than 10 years ago0.5550.21000.9381.627
11-20 years ago0.8430.0.0.8441.629
21-30 years ago0.5580.3710.11000.939
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.21000.0.0.21000.471
over 50 years ago0.21000.0.0.0.0.2100
total2.3230.5572.3215.09
ARn/a0.4740.0.0.11000.560
less than 10 years ago2.5230.11001.4314.116
11-20 years ago1.3360.0.0.9402.226
21-30 years ago0.5670.0.0.4550.945
31-40 years ago0.0.0.0.0.11000.1100
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.4740.0.0.0.0.474
total5.0120.11003.0188.16
BEn/a5.6181.1414.32011.012
less than 10 years ago50.354.42030.9785.73
11-20 years ago18.993.42315.81038.06
21-30 years ago5.3181.9306.31613.511
31-40 years ago2.5270.7503.6226.816
41-50 years ago1.2380.4711.4353.024
over 50 years ago4.3200.7504.3209.314
total88.2312.61166.64167.41
BL/BSn/a0.6570.0.0.0.0.657
less than 10 years ago8.5120.0.1.93210.410
11-20 years ago4.9180.0.1.5346.415
21-30 years ago0.8510.0.0.4711.241
31-40 years ago0.9500.0.0.3711.241
41-50 years ago0.21000.0.0.0.0.2100
over 50 years ago0.31000.0.0.0.0.3100
total16.260.0.4.12020.23
FRn/a2.0300.4720.5572.825
less than 10 years ago14.590.5575.01820.07
11-20 years ago5.6170.5572.7258.813
21-30 years ago2.0310.0.2.9224.818
31-40 years ago1.4350.0.0.4721.832
41-50 years ago0.7500.0.0.6581.438
over 50 years ago1.2410.0.1.1412.229
total27.451.33513.01041.73
GEn/a0.8530.0.0.0.0.853
less than 10 years ago0.8530.0.0.0.0.853
11-20 years ago0.0.0.0.0.0.0.0.
21-30 years ago0.31000.0.0.0.0.3100
31-40 years ago0.31000.0.0.0.0.3100
41-50 years ago0.8530.0.0.0.0.853
over 50 years ago0.0.0.0.0.0.0.0.
total2.8150.0.0.0.2.815
GLn/a0.5580.5580.21001.237
less than 10 years ago2.5251.1372.3275.815
11-20 years ago1.7300.5581.4343.619
21-30 years ago0.4710.5580.4711.338
31-40 years ago0.4720.4720.7501.435
41-50 years ago0.0.0.4720.21000.558
over 50 years ago0.7500.7510.3711.731
total6.0154.1185.41615.56
GRn/a6.1170.9457.81514.810
less than 10 years ago18.195.71724.0847.95
11-20 years ago12.5114.81914.31131.67
21-30 years ago5.5182.4276.51614.411
31-40 years ago3.9211.9306.61612.411
41-50 years ago2.7260.9455.2188.814
over 50 years ago14.9114.41913.31132.67
total63.7421.0977.74162.52
JUn/a1.3350.0.1.0402.426
less than 10 years ago9.5120.3713.92013.89
11-20 years ago7.4140.3682.62510.211
21-30 years ago2.1280.21001.2373.522
31-40 years ago0.9440.0.0.5581.435
41-50 years ago0.21000.0.0.5580.750
over 50 years ago0.21000.0.1.2371.435
total21.560.84311.01033.32
LUn/a2.7240.0.0.21002.923
less than 10 years ago17.480.0.2.72520.17
11-20 years ago9.5120.4711.93011.811
21-30 years ago3.1240.21000.8444.120
31-40 years ago0.5580.0.0.21000.750
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago1.4370.0.0.5581.931
total34.640.5586.31641.42
NEn/a1.1410.11000.0.1.238
less than 10 years ago16.670.9442.32619.86
11-20 years ago4.5190.0.0.11004.618
21-30 years ago1.3380.0.0.0.1.338
31-40 years ago0.3710.0.0.0.0.371
41-50 years ago0.21000.0.0.21000.472
over 50 years ago0.0.0.0.0.3710.371
total24.041.0402.92227.93
NWn/a0.4720.21000.0.0.657
less than 10 years ago1.8310.8491.7324.317
11-20 years ago0.7560.0.0.6591.339
21-30 years ago0.0.0.0.0.0.0.0.
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.11000.0.0.3680.453
over 50 years ago1.3400.21000.0.1.536
total4.3171.2402.6248.17
OWn/a1.1400.11000.9442.228
less than 10 years ago3.4210.3722.8246.514
11-20 years ago2.0260.3731.2373.620
21-30 years ago0.9450.11000.7501.831
31-40 years ago0.5570.21000.6561.337
41-50 years ago0.4710.4710.21000.944
over 50 years ago1.6330.11001.4353.122
total10.0111.6317.91219.43
SGn/a1.5330.3712.2274.120
less than 10 years ago11.7111.33810.21223.27
11-20 years ago5.5181.4356.61513.510
21-30 years ago0.9450.6582.6264.121
31-40 years ago0.4710.21001.7312.328
41-50 years ago1.0410.4710.9452.328
over 50 years ago1.9310.21003.0245.118
total22.984.52027.1654.63
SHn/a0.4700.0.0.21000.657
less than 10 years ago7.6100.0.0.0.7.610
11-20 years ago3.4210.0.0.21003.620
21-30 years ago0.0.0.0.0.21000.2100
31-40 years ago0.21000.0.0.0.0.2100
41-50 years ago0.21000.0.0.0.0.2100
over 50 years ago0.0.0.0.0.0.0.0.
total11.830.0.0.55612.42
SOn/a1.8300.0.0.4712.227
less than 10 years ago18.470.0.0.94519.36
11-20 years ago6.8150.0.0.8457.614
21-30 years ago1.1360.0.0.11001.334
31-40 years ago0.7510.0.0.4701.241
41-50 years ago0.0.0.0.0.21000.2100
over 50 years ago0.5590.21000.0.0.750
total29.430.21002.92432.52
SZn/a1.4350.0.1.2372.625
less than 10 years ago6.4150.8453.72111.010
11-20 years ago2.3280.11003.1235.617
21-30 years ago1.4350.21001.0402.625
31-40 years ago0.9450.11001.3372.327
41-50 years ago0.7500.0.0.8451.533
over 50 years ago1.3350.4710.7502.426
total14.591.73111.81028.04
TGn/a0.5490.0.0.0.0.549
less than 10 years ago11.380.0.2.02813.37
11-20 years ago4.6170.0.0.3745.016
21-30 years ago0.7530.0.0.0.0.753
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.3730.0.0.0.0.373
total17.340.0.2.32519.73
TIn/a2.4260.7507.21510.313
less than 10 years ago2.9251.0408.11512.012
11-20 years ago2.6260.5587.71510.813
21-30 years ago1.5351.3386.7169.413
31-40 years ago2.1290.9457.01610.013
41-50 years ago1.8320.210012.31114.311
over 50 years ago7.6154.02131.2742.85
total21.098.51480.13109.62
URn/a1.4350.5560.21002.028
less than 10 years ago2.1261.3342.2265.614
11-20 years ago0.6490.21000.8441.630
21-30 years ago1.0400.9440.3712.226
31-40 years ago0.0.0.5570.0.0.557
41-50 years ago0.3710.21000.0.0.558
over 50 years ago1.3340.3711.2372.823
total6.8133.8184.81615.45
VDn/a4.8190.21002.1277.215
less than 10 years ago36.862.2286.01645.05
11-20 years ago14.2101.1412.42617.79
21-30 years ago8.4140.3711.73110.412
31-40 years ago2.5260.3711.2384.021
41-50 years ago1.4350.3701.0412.825
over 50 years ago4.6190.4712.1277.115
total72.834.81816.6994.22
VSn/a3.7221.9305.81711.512
less than 10 years ago6.5165.41810.51222.38
11-20 years ago4.2203.5226.51614.210
21-30 years ago3.5222.8257.11513.411
31-40 years ago2.4273.6216.21612.211
41-50 years ago1.8311.4355.9179.013
over 50 years ago6.9165.21811.81224.08
total29.0723.7853.84106.52
ZGn/a0.0.0.0.0.21000.2100
less than 10 years ago2.6200.21001.2333.913
11-20 years ago0.3730.0.0.7471.039
21-30 years ago0.0.0.0.0.3680.368
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.21000.0.0.0.0.2100
total3.1170.21002.4205.76
ZHn/a2.7250.0.0.0.2.725
less than 10 years ago34.740.0.1.23735.94
11-20 years ago7.5140.0.0.21007.714
21-30 years ago2.1280.0.0.0.2.128
31-40 years ago0.5570.0.0.21000.750
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.3700.0.0.0.0.370
total47.920.0.1.63349.41
Switzerlandn/a45.566.91634.8787.24
less than 10 years ago321.5226.58125.84473.81
11-20 years ago129.4317.01073.05219.43
21-30 years ago44.9611.71239.7696.34
31-40 years ago22.198.91431.1762.05
41-50 years ago14.5114.52029.8748.86
over 50 years ago52.1616.81072.55141.43
total630.0192.24406.821128.91
© WSL, Swiss National Forest Inventory, 19.06.2020 #853445/319776
NFI2
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: canton
unit: 1000 ha
unit of evaluation: forest
grid: 1.4 x 1.4 km grid
state1993/95
avalanches SilvaProtect
n/ainside perimeteroutside perimetertotal
cantontime of last treatment (classes of 10 years)1000 ha± %1000 ha± %1000 ha± %1000 ha± %
AGn/a0.21000.0.0.0.0.2100
less than 10 years ago35.040.0.0.0.35.04
11-20 years ago8.4140.0.0.0.8.414
21-30 years ago2.0310.0.0.0.2.031
31-40 years ago1.0440.0.0.0.1.044
41-50 years ago0.6580.0.0.0.0.658
over 50 years ago0.8500.0.0.0.0.850
total48.120.0.0.0.48.12
AIn/a0.0.0.0.0.0.0.0.
less than 10 years ago0.4680.21000.9421.531
11-20 years ago0.9420.0.1.0431.927
21-30 years ago0.6580.4720.21001.139
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.21000.0.0.21000.471
over 50 years ago0.21000.0.0.0.0.2100
total2.3250.6572.2245.19
ARn/a0.0.0.0.0.0.0.0.
less than 10 years ago2.9220.21001.1414.117
11-20 years ago1.5350.0.1.0392.525
21-30 years ago0.5670.0.0.5551.044
31-40 years ago0.0.0.0.0.21000.2100
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.4730.0.0.0.0.473
total5.3130.21002.7228.16
BEn/a7.1170.6581.4389.115
less than 10 years ago50.455.02031.8787.24
11-20 years ago21.393.82317.81042.86
21-30 years ago6.0182.2307.11615.211
31-40 years ago2.7270.8504.1227.616
41-50 years ago1.4380.4711.6353.424
over 50 years ago4.8200.8505.02010.613
total93.8313.51268.74176.01
BL/BSn/a0.21000.0.0.0.0.2100
less than 10 years ago8.2130.0.1.6379.911
11-20 years ago5.5170.0.1.7347.114
21-30 years ago0.9510.0.0.4711.341
31-40 years ago0.9500.0.0.4711.341
41-50 years ago0.21000.0.0.0.0.2100
over 50 years ago0.31000.0.0.0.0.3100
total16.360.0.4.12120.43
FRn/a1.0450.0.0.0.1.045
less than 10 years ago14.7100.5575.11920.38
11-20 years ago6.3170.5573.0259.813
21-30 years ago2.2310.0.3.2215.418
31-40 years ago1.6350.0.0.4722.032
41-50 years ago0.8500.0.0.7581.538
over 50 years ago1.3410.0.1.2412.529
total28.051.04013.51042.52
GEn/a0.6750.0.0.0.0.675
less than 10 years ago1.2500.0.0.0.1.250
11-20 years ago0.0.0.0.0.0.0.0.
21-30 years ago0.41000.0.0.0.0.4100
31-40 years ago0.41000.0.0.0.0.4100
41-50 years ago1.2500.0.0.0.1.250
over 50 years ago0.0.0.0.0.0.0.0.
total3.750.0.0.0.3.75
GLn/a3.7220.21001.0445.019
less than 10 years ago2.0311.3362.0305.217
11-20 years ago1.9290.6581.5344.019
21-30 years ago0.4710.6570.4711.437
31-40 years ago0.4710.4710.8501.634
41-50 years ago0.0.0.4710.21000.657
over 50 years ago0.8500.8500.4711.931
total9.2134.2196.31519.75
GRn/a21.2101.4384.72027.38
less than 10 years ago18.5105.31923.7947.66
11-20 years ago14.0115.41916.21135.67
21-30 years ago6.2182.7277.41616.311
31-40 years ago4.3212.2307.51614.011
41-50 years ago3.1261.0455.91810.014
over 50 years ago16.7105.21915.11137.17
total84.1423.3980.44187.81
JUn/a0.4710.0.0.0.0.471
less than 10 years ago9.8120.4713.92114.110
11-20 years ago8.2140.3672.92411.511
21-30 years ago2.3280.21001.4373.921
31-40 years ago1.0440.0.0.6571.635
41-50 years ago0.21000.0.0.6580.850
over 50 years ago0.21000.0.1.4371.635
total22.160.94310.71133.73
LUn/a1.0450.0.0.21001.241
less than 10 years ago17.280.0.3.12520.27
11-20 years ago10.6120.4712.22913.210
21-30 years ago3.4240.21001.0444.620
31-40 years ago0.6570.0.0.21000.850
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago1.5370.21000.6582.330
total34.340.8507.21542.42
NEn/a0.21000.0.0.21000.371
less than 10 years ago16.971.0442.32720.26
11-20 years ago5.1190.0.0.21005.218
21-30 years ago1.4380.0.0.0.1.438
31-40 years ago0.4710.0.0.0.0.471
41-50 years ago0.31000.0.0.21000.572
over 50 years ago0.0.0.0.0.4720.472
total24.251.0443.22228.43
NWn/a0.21000.0.0.0.0.2100
less than 10 years ago1.8330.9491.5374.219
11-20 years ago0.8560.0.0.7591.539
21-30 years ago0.0.0.0.0.0.0.0.
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.21000.0.0.4670.552
over 50 years ago1.4390.31000.0.1.736
total4.4171.2442.6268.17
OWn/a0.21000.0.0.21000.470
less than 10 years ago3.6220.3723.1247.014
11-20 years ago2.3270.4741.4374.119
21-30 years ago1.0450.11000.8502.031
31-40 years ago0.6570.21000.7561.537
41-50 years ago0.4710.5710.21001.144
over 50 years ago1.8330.11001.5353.422
total9.9111.7338.01319.54
SGn/a3.2250.21003.2256.617
less than 10 years ago11.6121.04510.01322.68
11-20 years ago6.1171.7357.41515.210
21-30 years ago1.0450.7583.0264.721
31-40 years ago0.4710.21002.0312.728
41-50 years ago1.1410.5711.0452.627
over 50 years ago2.2310.21003.4245.918
total25.784.52130.1660.33
SHn/a0.0.0.0.0.0.0.0.
less than 10 years ago7.7110.0.0.0.7.711
11-20 years ago3.8200.0.0.21004.019
21-30 years ago0.0.0.0.0.21000.2100
31-40 years ago0.21000.0.0.0.0.2100
41-50 years ago0.21000.0.0.0.0.2100
over 50 years ago0.0.0.0.0.0.0.0.
total11.940.0.0.46912.33
SOn/a0.0.0.0.0.0.0.0.
less than 10 years ago18.970.0.1.04519.97
11-20 years ago7.7140.0.1.0458.713
21-30 years ago1.2360.0.0.21001.433
31-40 years ago0.8510.0.0.5701.341
41-50 years ago0.0.0.0.0.21000.2100
over 50 years ago0.6590.21000.0.0.850
total29.330.21002.92632.32
SZn/a0.8500.21000.21001.340
less than 10 years ago6.8150.7503.72211.211
11-20 years ago2.6270.21003.5236.217
21-30 years ago1.6350.21001.1402.925
31-40 years ago1.0450.21001.4372.627
41-50 years ago0.8500.0.1.0451.833
over 50 years ago1.5350.4710.8502.726
total15.191.93111.71128.73
TGn/a0.11000.0.0.0.0.1100
less than 10 years ago11.390.0.2.02813.47
11-20 years ago5.0170.0.0.4735.316
21-30 years ago0.7520.0.0.0.0.752
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.3720.0.0.0.0.372
total17.550.0.2.42619.93
TIn/a12.3120.65816.61029.58
less than 10 years ago3.1261.2407.51611.813
11-20 years ago2.9260.4718.51511.813
21-30 years ago1.6351.4387.51610.613
31-40 years ago2.4291.0457.91611.213
41-50 years ago2.0320.210014.01116.210
over 50 years ago8.5154.52135.0748.05
total32.879.21497.03139.02
URn/a3.4240.4710.8504.620
less than 10 years ago1.8311.3362.4275.516
11-20 years ago0.7490.21001.0441.930
21-30 years ago1.2401.0440.4712.626
31-40 years ago0.0.0.6560.0.0.656
41-50 years ago0.4720.21000.0.0.658
over 50 years ago1.6320.4711.4373.522
total9.2124.0205.91519.25
VDn/a3.4240.21000.4714.022
less than 10 years ago37.462.5276.31746.25
11-20 years ago16.1101.2412.52719.99
21-30 years ago9.6140.4711.93111.912
31-40 years ago2.8260.4711.3384.521
41-50 years ago1.6350.4701.2413.125
over 50 years ago5.2190.4712.5278.115
total76.135.51816.21097.92
VSn/a8.3151.2413.12512.612
less than 10 years ago6.5175.01910.81322.49
11-20 years ago4.8203.9227.31616.010
21-30 years ago4.0223.1258.11515.211
31-40 years ago2.7274.0217.01613.811
41-50 years ago2.0311.6356.61710.213
over 50 years ago7.9165.81813.41227.28
total36.2724.7856.44117.32
ZGn/a0.0.0.0.0.0.0.0.
less than 10 years ago2.3240.21001.3323.815
11-20 years ago0.4720.0.0.8471.139
21-30 years ago0.0.0.0.0.4670.467
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.21000.0.0.0.0.2100
total2.9190.21002.5205.57
ZHn/a0.0.0.0.0.0.0.0.
less than 10 years ago36.040.0.1.24137.24
11-20 years ago8.8140.0.0.21009.014
21-30 years ago2.6280.0.0.0.2.628
31-40 years ago0.7570.0.0.21000.850
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.4700.0.0.0.0.470
total48.420.0.1.63550.01
Switzerlandn/a67.554.92032.08104.54
less than 10 years ago326.0227.08126.64479.62
11-20 years ago145.8319.01082.25247.03
21-30 years ago50.9613.21244.96109.04
31-40 years ago25.0910.01435.1770.15
41-50 years ago16.7115.12033.9755.66
over 50 years ago58.8619.41082.05160.13
total690.6198.64436.721226.00
© WSL, Swiss National Forest Inventory, 19.06.2020 #853446/319777
NFI2
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: canton
unit: 1000 ha
unit of evaluation: forest
grid: terrestrial grid NFI2
state1993/95
avalanches SilvaProtect
n/ainside perimeteroutside perimetertotal
cantontime of last treatment (classes of 10 years)1000 ha± %1000 ha± %1000 ha± %1000 ha± %
AGn/a2.1280.0.0.0.2.128
less than 10 years ago33.940.0.0.0.33.94
11-20 years ago7.6140.0.0.0.7.614
21-30 years ago1.8310.0.0.0.1.831
31-40 years ago0.9440.0.0.0.0.944
41-50 years ago0.5580.0.0.0.0.558
over 50 years ago0.7500.0.0.0.0.750
total47.620.0.0.0.47.62
AIn/a0.21000.0.0.3710.557
less than 10 years ago0.5550.21000.9381.627
11-20 years ago0.8430.0.0.8441.629
21-30 years ago0.5580.3710.11000.939
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.21000.0.0.21000.471
over 50 years ago0.21000.0.0.0.0.2100
total2.3230.5572.3215.09
ARn/a0.4740.0.0.11000.560
less than 10 years ago2.5230.11001.4314.116
11-20 years ago1.3360.0.0.9402.226
21-30 years ago0.5670.0.0.4550.945
31-40 years ago0.0.0.0.0.11000.1100
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.4740.0.0.0.0.474
total5.0120.11003.0188.16
BEn/a12.3121.6335.61819.59
less than 10 years ago50.354.42030.9785.73
11-20 years ago18.993.42315.81038.06
21-30 years ago5.3181.9306.31613.511
31-40 years ago2.5270.7503.6226.816
41-50 years ago1.2380.4711.4353.024
over 50 years ago4.3200.7504.4209.513
total94.8313.11168.14176.01
BL/BSn/a0.8490.0.0.0.0.849
less than 10 years ago8.5120.0.1.93210.410
11-20 years ago4.9180.0.1.5346.415
21-30 years ago0.8510.0.0.4711.241
31-40 years ago0.9500.0.0.3711.241
41-50 years ago0.21000.0.0.0.0.2100
over 50 years ago0.31000.0.0.0.0.3100
total16.460.0.4.12020.53
FRn/a2.9250.4720.5573.822
less than 10 years ago14.590.5575.01820.07
11-20 years ago5.6170.5572.7258.813
21-30 years ago2.0310.0.2.9224.818
31-40 years ago1.4350.0.0.4721.832
41-50 years ago0.7500.0.0.6581.438
over 50 years ago1.2410.0.1.1412.229
total28.351.33513.01042.72
GEn/a0.9470.0.0.0.0.947
less than 10 years ago0.8530.0.0.0.0.853
11-20 years ago0.0.0.0.0.0.0.0.
21-30 years ago0.31000.0.0.0.0.3100
31-40 years ago0.31000.0.0.0.0.3100
41-50 years ago0.8530.0.0.0.0.853
over 50 years ago0.0.0.0.0.0.0.0.
total2.9150.0.0.0.2.915
GLn/a3.8210.7501.1405.717
less than 10 years ago2.5251.1372.3275.815
11-20 years ago1.7300.5581.4343.619
21-30 years ago0.4710.5580.4711.338
31-40 years ago0.4720.4720.7501.435
41-50 years ago0.0.0.4720.21000.558
over 50 years ago0.7500.7510.3711.731
total9.4124.3186.31420.04
GRn/a26.382.12911.31239.76
less than 10 years ago18.195.71724.0847.95
11-20 years ago12.5114.81914.31131.67
21-30 years ago5.5182.4276.51614.411
31-40 years ago3.9211.9306.61612.411
41-50 years ago2.7260.9455.2188.814
over 50 years ago14.9114.61913.31132.87
total83.9422.5881.24187.51
JUn/a1.3350.0.1.0402.426
less than 10 years ago9.5120.3713.92013.89
11-20 years ago7.4140.3682.62510.211
21-30 years ago2.1280.21001.2373.522
31-40 years ago0.9440.0.0.5581.435
41-50 years ago0.21000.0.0.5580.750
over 50 years ago0.21000.0.1.2371.435
total21.560.84311.01033.32
LUn/a3.4220.0.0.3713.721
less than 10 years ago17.480.0.2.72520.17
11-20 years ago9.5120.4711.93011.811
21-30 years ago3.1240.21000.8444.120
31-40 years ago0.5580.0.0.21000.750
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago1.4370.21000.5582.030
total35.340.7506.51542.52
NEn/a1.3370.11000.11001.633
less than 10 years ago16.670.9442.32619.86
11-20 years ago4.5190.0.0.11004.618
21-30 years ago1.3380.0.0.0.1.338
31-40 years ago0.3710.0.0.0.0.371
41-50 years ago0.21000.0.0.21000.472
over 50 years ago0.0.0.0.0.3710.371
total24.241.0403.12228.33
NWn/a0.5580.21000.21000.944
less than 10 years ago1.8310.8491.7324.317
11-20 years ago0.7560.0.0.6591.339
21-30 years ago0.0.0.0.0.0.0.0.
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.11000.0.0.3680.453
over 50 years ago1.3400.21000.0.1.536
total4.4161.2402.8238.46
OWn/a1.1400.11001.1402.327
less than 10 years ago3.4210.3722.9236.714
11-20 years ago2.0260.3731.2373.620
21-30 years ago0.9450.11000.7501.831
31-40 years ago0.5570.21000.6561.337
41-50 years ago0.4710.4710.21000.944
over 50 years ago1.6330.11001.4353.122
total10.0111.6318.21219.73
SGn/a4.2200.5585.0189.713
less than 10 years ago11.7111.33810.21223.27
11-20 years ago5.5181.4356.61513.510
21-30 years ago0.9450.6582.6264.121
31-40 years ago0.4710.21001.7312.328
41-50 years ago1.0410.4710.9452.328
over 50 years ago1.9310.21003.0245.118
total25.674.71929.9660.22
SHn/a0.4700.0.0.21000.657
less than 10 years ago7.6100.0.0.0.7.610
11-20 years ago3.4210.0.0.21003.620
21-30 years ago0.0.0.0.0.21000.2100
31-40 years ago0.21000.0.0.0.0.2100
41-50 years ago0.21000.0.0.0.0.2100
over 50 years ago0.0.0.0.0.0.0.0.
total11.830.0.0.55612.42
SOn/a1.8300.0.0.4712.227
less than 10 years ago18.470.0.0.94519.36
11-20 years ago6.8150.0.0.8457.614
21-30 years ago1.1360.0.0.11001.334
31-40 years ago0.7510.0.0.4701.241
41-50 years ago0.0.0.0.0.21000.2100
over 50 years ago0.5590.21000.0.0.750
total29.430.21002.92432.52
SZn/a2.3270.21001.3343.921
less than 10 years ago6.4150.8453.72111.010
11-20 years ago2.3280.11003.1235.617
21-30 years ago1.4350.21001.0402.625
31-40 years ago0.9450.11001.3372.327
41-50 years ago0.7500.0.0.8451.533
over 50 years ago1.3350.4710.7502.426
total15.491.93012.01029.33
TGn/a0.5490.0.0.0.0.549
less than 10 years ago11.380.0.2.02813.37
11-20 years ago4.6170.0.0.3745.016
21-30 years ago0.7530.0.0.0.0.753
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.3730.0.0.0.0.373
total17.340.0.2.32519.73
TIn/a14.4111.23822.6838.26
less than 10 years ago2.9251.0408.11512.012
11-20 years ago2.6260.5587.71510.813
21-30 years ago1.5351.3386.7169.413
31-40 years ago2.1290.9457.01610.013
41-50 years ago1.8320.210012.51114.510
over 50 years ago7.6154.02131.4743.05
total32.979.01395.93137.91
URn/a4.6190.8440.9446.316
less than 10 years ago2.1261.3342.2265.614
11-20 years ago0.6490.21000.8441.630
21-30 years ago1.0400.9440.3712.226
31-40 years ago0.0.0.5570.0.0.557
41-50 years ago0.3710.21000.0.0.558
over 50 years ago1.5320.3711.2373.022
total10.1114.2185.51519.85
VDn/a7.3150.3712.52610.213
less than 10 years ago37.062.2286.01645.25
11-20 years ago14.2101.1412.42617.79
21-30 years ago8.4140.3711.73110.412
31-40 years ago2.5260.3711.2384.021
41-50 years ago1.4350.3701.0412.825
over 50 years ago4.6190.4712.1277.115
total75.435.01817.0997.42
VSn/a11.2122.9248.11422.38
less than 10 years ago6.5165.41810.61222.58
11-20 years ago4.2203.5226.51614.210
21-30 years ago3.5222.8257.11513.411
31-40 years ago2.4273.6216.21612.211
41-50 years ago1.8311.4355.9179.013
over 50 years ago6.9165.21811.81224.08
total36.4624.7756.34117.42
ZGn/a0.0.0.0.0.21000.2100
less than 10 years ago2.6200.21001.2333.913
11-20 years ago0.3730.0.0.7471.039
21-30 years ago0.0.0.0.0.3680.368
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.21000.0.0.0.0.2100
total3.1170.21002.4205.76
ZHn/a2.7250.0.0.0.2.725
less than 10 years ago34.740.0.1.23735.94
11-20 years ago7.5140.0.0.21007.714
21-30 years ago2.1280.0.0.0.2.128
31-40 years ago0.5570.0.0.21000.750
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.3700.0.0.0.0.370
total47.920.0.1.63349.41
Switzerlandn/a106.6411.31262.95180.93
less than 10 years ago321.7226.58126.14474.31
11-20 years ago129.4317.01073.05219.43
21-30 years ago44.9611.71239.7696.34
31-40 years ago22.198.91431.1762.05
41-50 years ago14.5114.52029.9748.96
over 50 years ago52.3617.21072.95142.33
total691.5196.94435.721224.10
© WSL, Swiss National Forest Inventory, 19.06.2020 #853447/319778
NFI1
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: protection forest region
unit: 1000 ha
unit of evaluation: forest
grid: 1.4 x 1.4 km grid
state1983/85
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern Alps Switzerland
avalanches SilvaProtecttime of last treatment (classes of 10 years)1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %
n/an/a2.8275.8186.5177.31712.01314.21148.66
less than 10 years ago273.7248.6630.976.61723.394.222387.22
11-20 years ago56.8614.7118.7154.8206.6173.92395.44
21-30 years ago15.0116.6173.4243.7235.6192.42936.77
31-40 years ago4.3215.1202.6282.2304.7202.62821.410
41-50 years ago1.1412.2301.5351.3381.6351.6359.314
over 50 years ago11.91310.3147.3169.91414.41110.01463.85
total365.7193.4460.8535.8768.1538.87662.61
inside perimetern/a0.0.1.0450.4710.6581.2411.2414.421
less than 10 years ago2.7279.8144.1224.6207.2161.73330.28
11-20 years ago0.4714.9204.5204.5203.1252.03219.410
21-30 years ago0.8501.6351.9335.4182.0321.63513.212
31-40 years ago0.21002.0321.4382.0311.0450.8507.316
41-50 years ago0.0.0.0.0.21001.0450.9451.2413.224
over 50 years ago0.8502.2303.0266.2173.4234.72020.410
total4.92021.6915.41124.3819.01013.11298.24
outside perimetern/a0.21000.8502.8271.5351.73313.31220.410
less than 10 years ago29.3846.5630.6710.21322.8914.911154.23
11-20 years ago8.91521.499.31410.41310.21310.71370.75
21-30 years ago4.7207.0175.4199.4147.81610.91345.16
31-40 years ago2.2304.3223.7238.2154.82017.61040.77
41-50 years ago0.8502.8271.4382.7261.53511.81321.09
over 50 years ago6.3187.7165.71813.7118.81531.4773.55
total52.3690.4458.9556.2457.55110.53425.72
totaln/a3.0267.7169.7149.41415.01128.6873.45
less than 10 years ago305.81104.9365.5421.4953.3520.89571.71
11-20 years ago66.0541.0622.5919.7919.9916.510185.63
21-30 years ago20.51015.21110.61318.51015.41114.81195.04
31-40 years ago6.71711.3137.61612.41210.41321.1969.55
41-50 years ago1.9325.0203.1255.0194.12214.51133.67
over 50 years ago19.01020.21016.01029.9726.6846.06157.73
total422.91205.31135.02116.22144.62162.321186.51
© WSL, Swiss National Forest Inventory, 19.06.2020 #853448/319779
NFI1
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: protection forest region
unit: 1000 ha
unit of evaluation: accessible forest without shrub forest
grid: terrestrial grid NFI1
state1983/85
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern Alps Switzerland
avalanches SilvaProtecttime of last treatment (classes of 10 years)1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %
n/an/a2.4210.3580.0.0.4500.3580.0.3.417
less than 10 years ago276.1148.7431.657.71122.864.016390.91
11-20 years ago58.1415.387.7114.8147.9113.41797.13
21-30 years ago13.196.7122.4203.2174.4152.42032.26
31-40 years ago5.2144.1162.0222.1224.7153.01821.27
41-50 years ago1.5261.5261.4271.0322.1220.8358.311
over 50 years ago13.099.4107.21210.6913.689.01062.94
total369.5185.9352.3429.8555.8422.66615.81
inside perimetern/a0.0.0.3580.0.0.11000.11000.11000.641
less than 10 years ago2.12210.3104.7145.8137.2122.02232.05
11-20 years ago0.8354.3153.4174.9142.9182.42018.87
21-30 years ago0.6412.1221.8245.1142.3211.82313.68
31-40 years ago0.11001.4271.1302.7191.3281.8238.411
41-50 years ago0.0.0.11000.4501.1301.5261.8235.014
over 50 years ago0.5452.1222.7195.7133.2174.61518.87
total4.21520.6714.1825.3518.6714.5897.23
outside perimetern/a0.11000.4500.0.0.7380.0.0.0.1.229
less than 10 years ago28.5645.8430.559.61024.0614.58152.92
11-20 years ago8.71119.979.5108.3119.61010.21066.14
21-30 years ago4.1167.7115.6138.5106.61211.6944.25
31-40 years ago2.5204.6153.2176.9124.81417.1739.15
41-50 years ago0.5452.0221.5262.4201.72410.6918.77
over 50 years ago4.9148.2115.01411.098.61130.4568.24
total49.3488.7355.4347.3455.3394.32390.41
totaln/a2.5201.0320.0.1.1290.4500.11005.114
less than 10 years ago306.81104.7266.7323.0654.0420.57575.81
11-20 years ago67.6439.5520.6717.9720.5716.08182.02
21-30 years ago17.8716.589.81016.8713.3815.8890.03
31-40 years ago7.81110.2106.31211.8910.8921.8668.74
41-50 years ago2.0223.6173.3174.5155.41313.2831.95
over 50 years ago18.4719.7715.0827.3625.4644.04149.92
total422.90195.21121.81102.42129.71131.411103.50
© WSL, Swiss National Forest Inventory, 19.06.2020 #853449/319780
NFI1
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: protection forest region
unit: 1000 ha
unit of evaluation: accessible forest without shrub forest NFI1/NFI2/NFI3/NFI4
grid: 1.4 x 1.4 km grid
state1983/85
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern Alps Switzerland
avalanches SilvaProtecttime of last treatment (classes of 10 years)1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %
n/an/a2.0320.4710.0.0.21000.4710.0.3.026
less than 10 years ago268.6246.3628.986.01821.893.026374.62
11-20 years ago55.2614.1127.9164.0226.0183.52490.74
21-30 years ago14.6115.8183.2253.3255.2192.23034.38
31-40 years ago4.1224.7212.6282.2304.1222.62820.210
41-50 years ago0.9452.2301.5351.3381.6351.0458.515
over 50 years ago10.5147.9165.6187.51611.5137.81551.06
total356.0181.4449.7524.5850.6520.19582.41
inside perimetern/a0.0.0.21000.0.0.0.0.0.0.21000.471
less than 10 years ago2.7279.6143.9224.6206.8171.73329.48
11-20 years ago0.4714.5214.5204.3213.1252.03218.810
21-30 years ago0.8501.6351.7355.2191.8331.63512.612
31-40 years ago0.21002.0321.2412.0311.0450.8507.217
41-50 years ago0.0.0.0.0.21001.0450.9451.2413.224
over 50 years ago0.6581.8332.6275.8183.2244.52118.610
total4.72019.81014.01122.9817.01011.91290.24
outside perimetern/a0.0.0.21000.0.0.5570.0.0.0.0.750
less than 10 years ago29.1845.0629.879.81322.6914.311150.63
11-20 years ago8.91521.098.4159.11410.01410.31367.75
21-30 years ago4.7206.2185.2199.2147.61610.51343.37
31-40 years ago2.2303.7232.9267.8154.82016.61037.97
41-50 years ago0.8502.6281.2412.7261.53511.41320.210
over 50 years ago5.7186.6174.12212.4127.41628.0864.15
total51.4685.3451.5551.6553.7591.13384.62
totaln/a2.0320.8500.0.0.7500.4710.21004.122
less than 10 years ago300.42100.9362.5420.5951.2519.010554.61
11-20 years ago64.5539.6620.8917.41019.1915.811177.23
21-30 years ago20.11013.61210.01417.71014.61114.21190.25
31-40 years ago6.51710.4146.71711.9129.81420.0965.35
41-50 years ago1.7334.8202.9265.0194.12213.51231.98
over 50 years ago16.81116.41112.31225.7822.1940.36133.74
total412.11186.41115.2299.02121.32123.121057.11
© WSL, Swiss National Forest Inventory, 19.06.2020 #853450/319781
NFI1
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
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
state1983/85
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern Alps Switzerland
avalanches SilvaProtecttime of last treatment (classes of 10 years)1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %
n/an/a2.0320.4710.0.0.21000.4710.0.3.026
less than 10 years ago273.6248.2630.576.61723.094.222386.02
11-20 years ago56.6614.5128.7154.6216.4173.72394.54
21-30 years ago14.8116.4173.4243.5245.4192.42935.97
31-40 years ago4.1225.1202.6282.2304.1222.62820.610
41-50 years ago1.1412.2301.5351.3381.6351.3389.115
over 50 years ago11.5138.9156.2178.71513.4128.81557.66
total363.8185.7452.9527.1854.3523.09606.81
inside perimetern/a0.0.0.21000.0.0.0.0.0.0.21000.471
less than 10 years ago2.7279.8143.9224.6207.0171.73329.88
11-20 years ago0.4714.9204.5204.5203.1252.03219.410
21-30 years ago0.8501.6351.9335.2191.8331.63512.812
31-40 years ago0.21002.0321.2412.0311.0450.8507.217
41-50 years ago0.0.0.0.0.21001.0450.9451.2413.224
over 50 years ago0.8502.0322.8275.8183.4234.72019.610
total4.92020.5914.41123.1817.41012.11292.44
outside perimetern/a0.0.0.21000.0.0.5570.0.0.0.0.750
less than 10 years ago29.3846.5630.6710.21322.8914.911154.23
11-20 years ago8.91521.499.31410.01410.21310.71370.35
21-30 years ago4.7207.0175.4199.2147.81610.71344.77
31-40 years ago2.2304.3222.9267.8154.82017.01038.97
41-50 years ago0.8502.6281.2412.7261.53511.61320.410
over 50 years ago6.1186.8174.62112.9128.31529.6768.45
total52.0688.7453.9553.4555.3594.43397.72
totaln/a2.0320.8500.0.0.7500.4710.21004.122
less than 10 years ago305.61104.5364.9421.4952.8520.89570.11
11-20 years ago65.9540.8622.5919.1919.7916.310184.23
21-30 years ago20.31015.01110.61317.91015.01114.61193.44
31-40 years ago6.51711.3136.71711.9129.81420.5966.75
41-50 years ago1.9324.8202.9265.0194.12214.11132.78
over 50 years ago18.41017.81013.71127.5825.1843.16145.63
total420.61194.91121.32103.62127.02129.521096.91
© WSL, Swiss National Forest Inventory, 19.06.2020 #853451/319782
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