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NFI2

forest area: rockfall SilvaProtect, modelled and assigned · degree of cover (aerial photo, 5 classes) · biogeographical region
unit: %
unit of evaluation: accessible forest excluding shrub forest
grid: terrestrial grid NFI2
state 1993/95
biogeographical region
JuraPlateauNorthern AlpsWestern Central-AlpsEastern Central-AlpsSouthern AlpsSwitzerland
rockfall SilvaProtect, modelled and assigneddegree of cover (aerial photo, 5 classes) %± %± %± %± %± %± %±
inside perimeter0-20%....1.41.42.62.6..1.81.81.50.8
21-40%....2.92.08.04.4..1.81.82.91.2
41-60%4.74.6..18.84.718.46.327.710.619.85.418.02.7
61-80%23.89.3..29.05.539.57.955.511.727.46.031.83.3
over 80%71.59.8100.0.47.86.031.57.516.88.849.26.745.83.5
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeter0-20%0.80.30.50.22.50.42.40.71.80.51.10.41.50.2
21-40%3.80.60.80.27.20.612.41.519.51.68.41.06.90.3
41-60%9.60.94.00.520.70.925.71.931.51.920.01.516.20.5
61-80%29.51.422.11.134.91.137.32.133.51.931.91.730.70.6
over 80%56.31.572.61.234.81.122.21.813.71.438.61.844.80.6
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
total0-20%0.70.30.50.22.40.42.40.71.70.51.10.41.50.1
21-40%3.70.60.80.27.00.612.11.419.01.68.01.06.70.3
41-60%9.50.94.00.520.60.925.21.931.41.820.01.416.30.4
61-80%29.41.422.11.134.71.137.52.134.11.931.61.730.70.6
over 80%56.61.572.71.235.31.122.81.813.81.439.31.744.80.6
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.

calculated by unit of reference: biogeographical region

© WSL, Swiss National Forest Inventory, 04.11.2014 #157415/143794

NFI2

forest area: rockfall SilvaProtect, modelled and assigned · degree of cover (aerial photo, 5 classes) · biogeographical region
unit: 1000 ha
unit of evaluation: accessible forest excluding shrub forest
grid: terrestrial grid NFI2
state 1993/95
biogeographical region
JuraPlateauNorthern AlpsWestern Central-AlpsEastern Central-AlpsSouthern AlpsSwitzerland
rockfall SilvaProtect, modelled and assigneddegree of cover (aerial photo, 5 classes)1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %
inside perimeter0-20%....0.21000.2100..0.21000.558
21-40%....0.4710.558..0.21001.041
41-60%0.2100..2.3281.2380.9451.9306.516
61-80%0.945..3.5222.5261.7312.72611.412
over 80%2.7260.5585.8172.0290.5584.81916.410
total3.8220.55812.2126.4163.1239.71335.87
outside perimeter0-20%1.4351.2388.0152.1291.9301.43516.010
21-40%7.2161.93023.4810.71220.9911.01275.15
41-60%18.31010.21367.3522.2833.8626.08177.83
61-80%56.0556.75113.8332.2635.9641.56336.22
over 80%106.93185.92113.4319.1914.71050.25490.21
total189.91256.01325.8186.33107.22130.121095.31
total0-20%1.4351.2388.2152.2281.9301.63316.510
21-40%7.2161.93023.7811.21220.9911.11276.15
41-60%18.5910.21369.6523.4834.7627.97184.33
61-80%56.9556.75117.3334.7637.6644.26347.52
over 80%109.63186.42119.2321.2815.21055.05506.61
total193.61256.61338.0192.72110.42139.821131.11

calculated by unit of reference: biogeographical region

© WSL, Swiss National Forest Inventory, 04.11.2014 #157416/143795

NFI2

forest area: rockfall SilvaProtect, modelled and assigned · degree of cover (aerial photo, 5 classes) · canton
unit: %
unit of evaluation: accessible forest excluding shrub forest
grid: terrestrial grid NFI2
state 1993/95
rockfall SilvaProtect, modelled and assigned
inside perimeteroutside perimetertotal
cantondegree of cover (aerial photo, 5 classes) %± %± %±
AG0-20%..0.40.40.40.4
21-40%......
41-60%..2.30.92.30.9
61-80%..23.42.623.42.6
over 80%..74.02.774.02.7
total..100.0.100.0.
AI0-20%..3.13.13.13.1
21-40%..9.45.29.45.2
41-60%..18.87.018.87.0
61-80%..21.97.421.97.4
over 80%..46.98.846.98.8
total..100.0.100.0.
AR0-20%......
21-40%..2.01.92.01.9
41-60%..3.92.73.92.7
61-80%..37.36.837.36.8
over 80%..56.87.056.87.0
total..100.0.100.0.
BE0-20%4.03.91.20.41.30.4
21-40%..3.80.63.70.6
41-60%16.07.314.41.214.41.1
61-80%28.09.035.11.634.91.6
over 80%52.010.045.51.645.71.6
total100.0.100.0.100.0.
BL/BS0-20%......
21-40%......
41-60%..3.01.72.91.7
61-80%..26.44.425.94.3
over 80%100.0.70.64.571.24.5
total100.0.100.0.100.0.
FR0-20%......
21-40%..1.30.81.30.8
41-60%..11.82.111.82.1
61-80%..28.83.028.83.0
over 80%..58.13.358.13.3
total..100.0.100.0.
GE0-20%......
21-40%......
41-60%..9.39.29.39.2
61-80%......
over 80%..90.79.290.79.2
total..100.0.100.0.
GL0-20%..2.61.82.21.6
21-40%..7.73.06.62.6
41-60%16.710.828.45.126.94.7
61-80%25.012.520.44.621.14.3
over 80%58.314.240.95.643.25.2
total100.0.100.0.100.0.
GR0-20%..2.00.51.90.5
21-40%..16.91.216.31.2
41-60%31.28.230.11.530.11.5
61-80%43.88.833.01.633.41.5
over 80%25.17.718.01.318.31.3
total100.0.100.0.100.0.
JU0-20%..0.50.50.50.5
21-40%..1.10.81.00.7
41-60%..8.12.07.92.0
61-80%33.319.322.23.122.53.0
over 80%66.719.368.13.468.13.4
total100.0.100.0.100.0.
LU0-20%..0.40.40.40.4
21-40%..4.71.44.71.4
41-60%..7.71.77.71.7
61-80%..30.13.030.13.0
over 80%..57.23.257.23.2
total..100.0.100.0.
NE0-20%..1.91.11.91.1
21-40%..3.11.43.11.4
41-60%..12.32.612.32.6
61-80%..42.03.941.73.9
over 80%100.0.40.73.941.13.9
total100.0.100.0.100.0.
NW0-20%..2.72.72.52.5
21-40%..8.14.57.54.2
41-60%..16.06.014.85.6
61-80%33.327.527.17.427.67.1
over 80%66.727.446.18.247.67.9
total100.0.100.0.100.0.
OW0-20%..2.81.62.71.6
21-40%..7.42.57.22.5
41-60%50.035.523.94.124.34.1
61-80%50.035.533.04.533.34.5
over 80%..33.04.532.44.5
total100.0.100.0.100.0.
SG0-20%..2.00.82.00.8
21-40%..4.01.13.91.1
41-60%..16.32.115.92.1
61-80%25.015.331.02.730.92.6
over 80%75.015.346.62.947.42.8
total100.0.100.0.100.0.
SH0-20%..1.51.51.51.5
21-40%..2.82.02.82.0
41-60%......
61-80%..21.65.221.65.2
over 80%..74.05.574.05.5
total..100.0.100.0.
SO0-20%......
21-40%......
41-60%..2.91.32.81.2
61-80%16.715.216.02.716.12.7
over 80%83.315.281.12.981.22.9
total100.0.100.0.100.0.
SZ0-20%..2.61.32.51.3
21-40%20.017.96.52.07.02.0
41-60%..15.02.914.62.8
61-80%20.017.932.73.832.33.7
over 80%60.021.943.14.043.73.9
total100.0.100.0.100.0.
TG0-20%..1.61.11.61.1
21-40%..3.21.63.21.6
41-60%..7.32.37.32.3
61-80%..30.44.130.44.1
over 80%..57.54.457.54.4
total..100.0.100.0.
TI0-20%2.42.40.90.41.00.4
21-40%2.42.47.21.16.91.0
41-60%14.15.318.11.617.81.5
61-80%26.36.832.62.032.21.9
over 80%54.97.741.22.142.22.0
total100.0.100.0.100.0.
UR0-20%..5.32.64.42.1
21-40%6.36.116.04.214.23.7
41-60%37.512.120.04.623.14.4
61-80%43.812.436.05.637.45.1
over 80%12.58.322.74.920.94.3
total100.0.100.0.100.0.
VD0-20%..1.50.51.50.5
21-40%..7.61.17.51.1
41-60%25.021.717.01.617.01.6
61-80%..28.81.928.61.9
over 80%75.021.745.22.145.42.1
total100.0.100.0.100.0.
VS0-20%2.52.53.00.73.00.7
21-40%7.64.212.61.412.31.3
41-60%17.46.025.31.824.81.7
61-80%37.57.735.32.035.41.9
over 80%34.97.523.81.824.51.7
total100.0.100.0.100.0.
ZG0-20%......
21-40%..2.92.92.92.9
41-60%......
61-80%..28.67.728.67.7
over 80%..68.67.768.67.7
total..100.0.100.0.
ZH0-20%..0.70.50.70.5
21-40%..1.40.71.40.7
41-60%..6.01.46.01.4
61-80%..22.12.522.12.5
over 80%..69.82.769.82.7
total..100.0.100.0.
Switzerland0-20%1.50.81.50.21.50.1
21-40%2.91.26.80.36.70.3
41-60%18.02.716.20.516.20.4
61-80%31.83.330.60.630.70.6
over 80%45.83.544.90.645.00.6
total100.0.100.0.100.0.

calculated by unit of reference: canton

© WSL, Swiss National Forest Inventory, 04.11.2014 #157417/143796

NFI2

forest area: rockfall SilvaProtect, modelled and assigned · degree of cover (aerial photo, 5 classes) · canton
unit: 1000 ha
unit of evaluation: accessible forest excluding shrub forest
grid: terrestrial grid NFI2
state 1993/95
rockfall SilvaProtect, modelled and assigned
inside perimeteroutside perimetertotal
cantondegree of cover (aerial photo, 5 classes)1000 ha± %1000 ha± %1000 ha± %
AG0-20%..0.21000.2100
21-40%......
41-60%..1.1401.140
61-80%..11.51111.511
over 80%..36.3436.34
total..49.1249.12
AI0-20%..0.21000.2100
21-40%..0.5560.556
41-60%..1.0381.038
61-80%..1.1341.134
over 80%..2.4202.420
total..5.275.27
AR0-20%......
21-40%..0.21000.2100
41-60%..0.3700.370
61-80%..3.1193.119
over 80%..4.7134.713
total..8.268.26
BE0-20%0.21002.0302.129
21-40%..6.2176.217
41-60%0.75023.4824.18
61-80%1.23857.1558.35
over 80%2.32874.0476.44
total4.520162.72167.22
BL/BS0-20%......
21-40%......
41-60%..0.6570.657
61-80%..5.3175.317
over 80%0.47014.2814.67
total0.47020.1420.54
FR0-20%......
21-40%..0.6580.658
41-60%..5.0185.018
61-80%..12.11112.111
over 80%..24.5624.56
total..42.2342.23
GE0-20%......
21-40%......
41-60%..0.21000.2100
61-80%......
over 80%..2.4212.421
total..2.7182.718
GL0-20%..0.3700.370
21-40%..1.0401.040
41-60%0.3703.9204.219
61-80%0.5572.8243.321
over 80%1.2375.6156.813
total2.12813.6815.77
GR0-20%..3.1233.123
21-40%..26.3826.38
41-60%1.73146.9548.65
61-80%2.42751.4553.85
over 80%1.43528.0729.47
total5.517155.72161.22
JU0-20%..0.21000.2100
21-40%..0.4710.471
41-60%..2.7252.725
61-80%0.4717.3147.614
over 80%0.75022.4623.15
total1.14032.9333.93
LU0-20%..0.21000.2100
21-40%..1.9301.930
41-60%..3.1233.123
61-80%..12.31012.310
over 80%..23.4623.46
total..41.0341.03
NE0-20%..0.5580.558
21-40%..0.9440.944
41-60%..3.5213.521
61-80%..12.01012.010
over 80%0.210011.61011.810
total0.210028.5328.73
NW0-20%..0.21000.2100
21-40%..0.6560.656
41-60%..1.2391.239
61-80%0.21002.0282.227
over 80%0.4703.3193.718
total0.6567.287.87
OW0-20%..0.5580.558
21-40%..1.4351.435
41-60%0.21004.5184.617
61-80%0.21006.2146.414
over 80%..6.2146.214
total0.37018.8419.14
SG0-20%..1.1411.141
21-40%..2.1292.129
41-60%..8.6138.613
61-80%0.37116.3916.69
over 80%1.04124.4725.57
total1.43552.4353.83
SH0-20%..0.21000.2100
21-40%..0.4710.471
41-60%......
61-80%..2.8242.824
over 80%..9.689.68
total..13.0413.04
SO0-20%......
21-40%......
41-60%..0.9450.945
61-80%0.21005.0175.217
over 80%0.94425.5526.34
total1.04031.4332.43
SZ0-20%..0.7500.750
21-40%0.21001.8312.030
41-60%..4.1204.120
61-80%0.21008.9139.112
over 80%0.55711.81012.39
total0.94427.3428.24
TG0-20%..0.3700.370
21-40%..0.7490.749
41-60%..1.5331.533
61-80%..6.4146.414
over 80%..12.1812.18
total..20.9420.94
TI0-20%0.21000.9451.141
21-40%0.21007.3157.515
41-60%1.14118.4919.49
61-80%2.03033.2635.16
over 80%4.12141.9646.05
total7.515101.72109.22
UR0-20%..0.7500.750
21-40%0.21002.2282.427
41-60%1.1402.7253.820
61-80%1.3374.9186.215
over 80%0.4703.1233.521
total2.92413.7916.67
VD0-20%..1.4351.435
21-40%..7.2157.215
41-60%0.210016.21016.410
61-80%..27.5727.57
over 80%0.55843.1543.75
total0.75095.5296.22
VS0-20%0.21002.9243.123
21-40%0.55812.21112.711
41-60%1.23824.5825.67
61-80%2.52634.1636.66
over 80%2.42722.9825.37
total6.81596.53103.32
ZG0-20%......
21-40%..0.21000.2100
41-60%......
61-80%..1.7281.728
over 80%..4.0134.013
total..5.865.86
ZH0-20%..0.4710.471
21-40%..0.7500.750
41-60%..3.0243.024
61-80%..11.01111.011
over 80%..34.8434.84
total..49.9249.92
Switzerland0-20%0.55815.91016.510
21-40%1.14174.6575.75
41-60%6.516177.23183.73
61-80%11.412335.92347.32
over 80%16.410492.51508.91
total35.971096.111131.91

calculated by unit of reference: canton

© WSL, Swiss National Forest Inventory, 04.11.2014 #157418/143797

NFI2

forest area: rockfall SilvaProtect, modelled and assigned · degree of cover (aerial photo, 5 classes) · production region
unit: %
unit of evaluation: accessible forest excluding shrub forest
grid: terrestrial grid NFI2
state 1993/95
production region
JuraPlateauPre-AlpsAlpsSouthern AlpsSwitzerland
rockfall SilvaProtect, modelled and assigneddegree of cover (aerial photo, 5 classes) %± %± %± %± %± %±
inside perimeter0-20%......1.81.21.81.81.50.8
21-40%....7.77.43.61.81.81.82.91.2
41-60%4.64.5..23.111.719.43.719.85.318.02.7
61-80%23.89.3..23.111.737.14.527.46.031.83.3
over 80%71.59.8100.0.46.213.838.14.649.26.745.83.5
total100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeter0-20%0.70.30.50.21.20.32.90.41.10.41.50.2
21-40%3.40.61.10.34.20.613.90.88.71.16.90.3
41-60%9.00.94.50.616.81.127.11.019.61.516.20.5
61-80%28.61.422.61.236.51.433.51.131.91.730.70.6
over 80%58.31.571.21.341.41.422.71.038.71.844.80.6
total100.0.100.0.100.0.100.0.100.0.100.0.
total0-20%0.70.30.50.21.20.32.80.41.20.41.50.1
21-40%3.30.51.10.34.30.613.30.88.21.06.70.3
41-60%8.90.94.50.616.81.126.61.019.61.416.30.5
61-80%28.51.422.51.236.31.433.71.131.61.730.70.6
over 80%58.61.571.31.341.41.423.60.939.51.844.80.6
total100.0.100.0.100.0.100.0.100.0.100.0.

calculated by unit of reference: production region

© WSL, Swiss National Forest Inventory, 04.11.2014 #157419/143798

NFI2

forest area: rockfall SilvaProtect, modelled and assigned · degree of cover (aerial photo, 5 classes) · production region
unit: 1000 ha
unit of evaluation: accessible forest excluding shrub forest
grid: terrestrial grid NFI2
state 1993/95
production region
JuraPlateauPre-AlpsAlpsSouthern AlpsSwitzerland
rockfall SilvaProtect, modelled and assigneddegree of cover (aerial photo, 5 classes)1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %
inside perimeter0-20%......0.3710.21000.558
21-40%....0.21000.7500.21001.141
41-60%0.2100..0.5583.8211.9306.416
61-80%0.945..0.5587.3152.62611.412
over 80%2.7260.4711.1417.5154.81916.410
total3.8220.4712.32819.699.71335.77
outside perimeter0-20%1.4351.2382.5279.4141.43515.910
21-40%6.7162.6269.01445.7610.91275.05
41-60%17.61010.41335.7789.2424.78177.53
61-80%56.1551.8577.74110.3340.26336.02
over 80%114.53163.5288.1474.8448.85489.81
total196.31229.51213.01329.41126.121094.31
total0-20%1.4351.2382.5279.7131.63316.510
21-40%6.7162.6269.21446.4611.11276.05
41-60%17.81010.41336.3793.0426.68184.03
61-80%57.0551.8578.24117.6342.86347.42
over 80%117.33163.8289.2482.3453.65506.21
total200.11229.81215.31349.01135.821130.01

calculated by unit of reference: production region

© WSL, Swiss National Forest Inventory, 04.11.2014 #157420/143799

NFI2

forest area: avalanches SilvaProtect, modelled and assigned · stand stability · economic region
unit: %
unit of evaluation: accessible forest excluding shrub forest
grid: terrestrial grid NFI2
state 1993/95
avalanches SilvaProtect, modelled and assigned
inside perimeteroutside perimetertotal
economic regionstand stability %± %± %±
Western Juran/a..0.20.20.20.2
critical8.05.41.40.41.60.4
less stable32.09.336.11.735.91.6
stable60.09.862.31.762.21.7
total100.0.100.0.100.0.
Eastern Juran/a......
critical..1.20.71.20.7
less stable..32.53.032.53.0
stable..66.33.066.33.0
total..100.0.100.0.
Western Plateaun/a......
critical..2.91.02.91.0
less stable..46.93.046.93.0
stable..50.23.050.23.0
total..100.0.100.0.
Central Plateaun/a..0.70.40.70.4
critical..7.31.37.31.3
less stable..45.42.545.42.5
stable..46.62.546.62.5
total..100.0.100.0.
Eastern Plateaun/a..0.30.20.30.2
critical..3.90.83.90.8
less stable..37.41.937.41.9
stable..58.42.058.42.0
total..100.0.100.0.
Western Pre-Alpsn/a..0.50.50.40.4
critical8.05.410.72.110.42.0
less stable56.09.949.83.450.43.2
stable36.09.639.13.338.83.2
total100.0.100.0.100.0.
Central Pre-Alpsn/a3.23.21.30.51.40.5
critical16.16.68.51.28.91.2
less stable61.38.749.62.250.32.1
stable19.47.140.62.139.42.1
total100.0.100.0.100.0.
Eastern Pre-Alpsn/a5.65.42.50.82.70.8
critical11.17.46.81.37.01.3
less stable61.111.549.52.550.02.5
stable22.29.841.22.540.32.4
total100.0.100.0.100.0.
Northwestern Alpsn/a1.81.82.00.92.00.8
critical12.54.49.01.89.61.7
less stable57.16.645.63.247.72.9
stable28.66.043.43.240.72.8
total100.0.100.0.100.0.
Central Alpsn/a6.14.24.41.94.71.8
critical39.48.518.23.622.93.5
less stable42.48.643.54.643.34.1
stable12.15.733.94.429.03.7
total100.0.100.0.100.0.
Northeastern Alpsn/a8.34.64.41.75.21.7
critical8.34.611.42.710.82.3
less stable58.28.250.74.252.23.8
stable25.27.333.54.031.83.5
total100.0.100.0.100.0.
Southwestern Alpsn/a2.21.31.70.61.80.5
critical8.82.49.91.49.61.2
less stable54.74.342.12.344.92.0
stable34.34.146.32.343.62.0
total100.0.100.0.100.0.
Southeastern Alpsn/a..1.90.51.70.5
critical13.33.410.41.210.71.1
less stable54.15.047.21.948.11.8
stable32.64.740.51.939.51.8
total100.0.100.0.100.0.
Southern Alpsn/a..0.60.30.50.3
critical8.33.26.70.96.90.9
less stable42.45.843.11.943.01.8
stable49.35.949.61.949.61.8
total100.0.100.0.100.0.
Switzerlandn/a2.10.61.10.11.20.1
critical12.31.46.70.37.10.3
less stable52.22.243.30.644.00.6
stable33.42.048.90.647.70.6
total100.0.100.0.100.0.

calculated by unit of reference: economic region

© WSL, Swiss National Forest Inventory, 04.11.2014 #157421/143800

NFI2

forest area: avalanches SilvaProtect, modelled and assigned · stand stability · economic region
unit: 1000 ha
unit of evaluation: accessible forest excluding shrub forest
grid: terrestrial grid NFI2
state 1993/95
avalanches SilvaProtect, modelled and assigned
inside perimeteroutside perimetertotal
economic regionstand stability1000 ha± %1000 ha± %1000 ha± %
Western Juran/a..0.4710.471
critical0.4712.1292.527
less stable1.43553.4554.95
stable2.72692.3394.93
total4.520148.21152.61
Eastern Juran/a......
critical..0.6580.658
less stable..15.5915.59
stable..31.5531.55
total..47.5247.52
Western Plateaun/a......
critical..1.4351.435
less stable..23.3723.37
stable..24.9724.97
total..49.7349.73
Central Plateaun/a..0.5580.558
critical..5.0185.018
less stable..31.3631.36
stable..32.2632.26
total..69.1269.12
Eastern Plateaun/a..0.4710.471
critical..4.3204.320
less stable..41.5541.55
stable..64.8464.84
total..111.02111.02
Western Pre-Alpsn/a..0.21000.2100
critical0.4714.1204.519
less stable2.52619.3821.87
stable1.63315.1916.89
total4.51938.7443.23
Central Pre-Alpsn/a0.21001.2381.435
critical0.9458.0148.914
less stable3.42346.9550.35
stable1.14138.4639.56
total5.51894.62100.12
Eastern Pre-Alpsn/a0.21001.8311.930
critical0.3714.7195.018
less stable1.93034.1636.05
stable0.75028.3629.06
total3.12368.9272.02
Northwestern Alpsn/a0.21000.9451.141
critical1.3384.1215.418
less stable6.01720.8826.87
stable3.02519.8922.88
total10.41245.7456.13
Central Alpsn/a0.4710.9441.337
critical2.4273.8216.116
less stable2.5269.01311.611
stable0.7507.0157.814
total6.01620.8726.85
Northeastern Alpsn/a0.5581.0411.633
critical0.5572.7243.222
less stable3.62112.11015.79
stable1.5338.0139.612
total6.11624.0630.15
Southwestern Alpsn/a0.5581.4351.930
critical2.0297.9149.913
less stable12.61133.7646.45
stable7.91437.2645.15
total23.1880.23103.32
Southeastern Alpsn/a..2.3282.328
critical2.32812.21214.511
less stable9.21355.5564.84
stable5.61747.7553.35
total17.110117.72134.82
Southern Alpsn/a..0.7500.750
critical1.1418.3149.313
less stable5.51852.9558.45
stable6.41661.0467.34
total12.911122.92135.82
Switzerlandn/a1.93011.61213.511
critical11.51269.3580.85
less stable48.66449.52498.12
stable31.17508.41539.51
total93.241038.811132.01

calculated by unit of reference: economic region

© WSL, Swiss National Forest Inventory, 04.11.2014 #157422/143801

NFI2

forest area: avalanches SilvaProtect, modelled and assigned · degree of cover (aerial photo, 5 classes) · biogeographical region
unit: %
unit of evaluation: accessible forest excluding shrub forest
grid: terrestrial grid NFI2
state 1993/95
biogeographical region
JuraPlateauNorthern AlpsWestern Central-AlpsEastern Central-AlpsSouthern AlpsSwitzerland
avalanches SilvaProtect, modelled and assigneddegree of cover (aerial photo, 5 classes) %± %± %± %± %± %± %±
inside perimeter0-20%....1.80.91.61.11.21.2..1.30.5
21-40%4.03.9..6.41.79.52.614.13.812.83.89.21.3
41-60%3.93.9..19.42.722.93.729.44.933.35.323.11.8
61-80%40.09.8..35.93.340.94.447.05.435.95.439.02.1
over 80%52.010.0..36.43.325.23.88.23.017.94.327.31.9
total100.0...100.0.100.0.100.0.100.0.100.0.
outside perimeter0-20%0.80.30.50.22.50.42.60.81.80.61.20.41.50.2
21-40%3.70.60.80.27.10.612.91.619.71.77.41.06.50.3
41-60%9.70.94.00.520.71.025.92.131.72.018.51.515.70.5
61-80%29.21.422.11.134.61.236.42.332.12.031.11.730.00.6
over 80%56.71.572.71.235.11.222.12.014.61.541.71.846.40.6
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
total0-20%0.70.30.50.22.40.42.40.71.70.51.10.41.50.1
21-40%3.70.60.80.27.00.612.11.419.01.68.01.06.70.3
41-60%9.50.94.00.520.60.925.21.931.41.820.01.416.30.4
61-80%29.41.422.11.134.71.137.52.134.11.931.61.730.70.6
over 80%56.61.572.71.235.31.122.81.813.81.439.31.744.80.6
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.

calculated by unit of reference: biogeographical region

© WSL, Swiss National Forest Inventory, 04.11.2014 #157423/143802

NFI2

forest area: avalanches SilvaProtect, modelled and assigned · degree of cover (aerial photo, 5 classes) · biogeographical region
unit: 1000 ha
unit of evaluation: accessible forest excluding shrub forest
grid: terrestrial grid NFI2
state 1993/95
biogeographical region
JuraPlateauNorthern AlpsWestern Central-AlpsEastern Central-AlpsSouthern AlpsSwitzerland
avalanches SilvaProtect, modelled and assigneddegree of cover (aerial photo, 5 classes)1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %
inside perimeter0-20%....0.7500.3710.2100..1.238
21-40%0.2100..2.5272.0292.1291.8328.614
41-60%0.2100..7.4154.9184.4204.61921.59
61-80%1.831..13.8118.8137.0155.01936.37
over 80%2.328..14.0115.4171.2382.52725.48
total4.520..38.4621.5814.81013.81193.04
outside perimeter0-20%1.4351.2387.5151.9301.7311.63315.311
21-40%7.0161.93021.399.21318.899.41367.65
41-60%18.31010.21362.1518.5930.3723.38162.83
61-80%55.2556.75103.5425.9730.7739.26311.22
over 80%107.33186.42105.3415.81014.01152.55481.21
total189.21256.61299.6171.2395.53126.021038.11
total0-20%1.4351.2388.2152.2281.9301.63316.510
21-40%7.2161.93023.7811.21220.9911.11276.15
41-60%18.5910.21369.6523.4834.7627.97184.33
61-80%56.9556.75117.3334.7637.6644.26347.52
over 80%109.63186.42119.2321.2815.21055.05506.61
total193.61256.61338.0192.72110.42139.821131.11

calculated by unit of reference: biogeographical region

© WSL, Swiss National Forest Inventory, 04.11.2014 #157424/143803

NFI2

forest area: avalanches SilvaProtect, modelled and assigned · degree of cover (aerial photo, 5 classes) · canton
unit: %
unit of evaluation: accessible forest excluding shrub forest
grid: terrestrial grid NFI2
state 1993/95
avalanches SilvaProtect, modelled and assigned
inside perimeteroutside perimetertotal
cantondegree of cover (aerial photo, 5 classes) %± %± %±
AG0-20%..0.40.40.40.4
21-40%......
41-60%..2.30.92.30.9
61-80%..23.42.623.42.6
over 80%..74.02.774.02.7
total..100.0.100.0.
AI0-20%..3.43.43.13.1
21-40%33.327.56.94.89.45.2
41-60%33.327.517.27.118.87.0
61-80%..24.18.021.97.4
over 80%33.327.548.39.346.98.8
total100.0.100.0.100.0.
AR0-20%......
21-40%..2.02.02.01.9
41-60%..4.02.83.92.7
61-80%..38.16.937.36.8
over 80%100.0.56.07.156.87.0
total100.0.100.0.100.0.
BE0-20%2.82.01.20.41.30.4
21-40%1.41.43.90.73.70.6
41-60%21.14.813.91.214.41.1
61-80%47.95.933.81.634.91.6
over 80%26.85.347.21.745.71.6
total100.0.100.0.100.0.
BL/BS0-20%......
21-40%......
41-60%..2.91.72.91.7
61-80%..25.94.325.94.3
over 80%..71.24.571.24.5
total..100.0.100.0.
FR0-20%......
21-40%..1.40.81.30.8
41-60%12.511.711.82.211.82.1
61-80%50.017.728.03.028.83.0
over 80%37.517.158.93.358.13.3
total100.0.100.0.100.0.
GE0-20%......
21-40%......
41-60%..9.39.29.39.2
61-80%......
over 80%..90.79.290.79.2
total..100.0.100.0.
GL0-20%4.24.11.51.52.21.6
21-40%8.35.76.02.96.62.6
41-60%21.08.429.05.626.94.7
61-80%24.98.919.64.921.14.3
over 80%41.610.143.86.143.25.2
total100.0.100.0.100.0.
GR0-20%0.80.82.10.51.90.5
21-40%11.52.917.01.316.31.2
41-60%30.44.230.11.630.11.5
61-80%44.24.531.71.633.41.5
over 80%13.13.119.01.418.31.3
total100.0.100.0.100.0.
JU0-20%..0.50.50.50.5
21-40%..1.10.81.00.7
41-60%..8.12.07.92.0
61-80%40.021.922.03.022.53.0
over 80%60.021.968.33.468.13.4
total100.0.100.0.100.0.
LU0-20%..0.40.40.40.4
21-40%..4.71.44.71.4
41-60%33.327.37.31.77.71.7
61-80%..30.53.030.13.0
over 80%66.727.357.03.257.23.2
total100.0.100.0.100.0.
NE0-20%..1.91.11.91.1
21-40%16.715.32.51.33.11.4
41-60%..12.72.712.32.6
61-80%33.319.342.04.041.73.9
over 80%50.020.440.73.941.13.9
total100.0.100.0.100.0.
NW0-20%16.715.4..2.52.5
21-40%..8.94.97.54.2
41-60%..17.46.514.85.6
61-80%16.715.429.57.927.67.1
over 80%66.719.344.38.547.67.9
total100.0.100.0.100.0.
OW0-20%..3.01.72.71.6
21-40%..7.92.77.22.5
41-60%40.215.622.84.224.34.1
61-80%19.912.734.64.733.34.5
over 80%39.915.531.74.632.44.5
total100.0.100.0.100.0.
SG0-20%..2.10.92.00.8
21-40%4.24.13.91.13.91.1
41-60%20.88.315.52.215.92.1
61-80%25.08.831.32.830.92.6
over 80%50.010.247.23.047.42.8
total100.0.100.0.100.0.
SH0-20%..1.51.51.51.5
21-40%..2.82.02.82.0
41-60%......
61-80%..21.65.221.65.2
over 80%..74.05.574.05.5
total..100.0.100.0.
SO0-20%......
21-40%......
41-60%..2.81.22.81.2
61-80%..16.12.716.12.7
over 80%100.0.81.12.981.22.9
total100.0.100.0.100.0.
SZ0-20%..2.71.32.51.3
21-40%10.09.56.82.17.02.0
41-60%10.09.514.92.914.62.8
61-80%20.012.733.13.932.33.7
over 80%60.015.542.64.043.73.9
total100.0.100.0.100.0.
TG0-20%..1.61.11.61.1
21-40%..3.21.63.21.6
41-60%..7.32.37.32.3
61-80%..30.44.130.44.1
over 80%..57.54.457.54.4
total..100.0.100.0.
TI0-20%..1.10.41.00.4
21-40%16.35.36.01.06.91.0
41-60%30.66.616.71.617.81.5
61-80%32.66.732.22.032.21.9
over 80%20.45.844.12.142.22.0
total100.0.100.0.100.0.
UR0-20%..5.82.84.42.1
21-40%17.47.913.24.114.23.7
41-60%17.47.925.05.323.14.4
61-80%52.210.432.35.737.45.1
over 80%13.07.023.65.220.94.3
total100.0.100.0.100.0.
VD0-20%..1.50.51.50.5
21-40%7.14.97.51.27.51.1
41-60%14.36.617.21.717.01.6
61-80%39.39.228.02.028.61.9
over 80%39.39.245.72.245.42.1
total100.0.100.0.100.0.
VS0-20%1.51.03.40.83.00.7
21-40%10.32.612.91.512.31.3
41-60%21.93.525.72.024.81.7
61-80%40.84.233.92.235.41.9
over 80%25.53.724.22.024.51.7
total100.0.100.0.100.0.
ZG0-20%......
21-40%..2.92.92.92.9
41-60%......
61-80%..29.47.928.67.7
over 80%100.0.67.67.968.67.7
total100.0.100.0.100.0.
ZH0-20%..0.70.50.70.5
21-40%..1.40.71.40.7
41-60%..6.01.46.01.4
61-80%..22.12.522.12.5
over 80%..69.82.769.82.7
total..100.0.100.0.
Switzerland0-20%1.30.51.50.21.50.1
21-40%9.21.36.50.36.70.3
41-60%23.11.815.60.516.20.4
61-80%39.12.129.90.630.70.6
over 80%27.31.946.50.645.00.6
total100.0.100.0.100.0.

calculated by unit of reference: canton

© WSL, Swiss National Forest Inventory, 04.11.2014 #157425/143804

NFI2

forest area: avalanches SilvaProtect, modelled and assigned · degree of cover (aerial photo, 5 classes) · canton
unit: 1000 ha
unit of evaluation: accessible forest excluding shrub forest
grid: terrestrial grid NFI2
state 1993/95
avalanches SilvaProtect, modelled and assigned
inside perimeteroutside perimetertotal
cantondegree of cover (aerial photo, 5 classes)1000 ha± %1000 ha± %1000 ha± %
AG0-20%..0.21000.2100
21-40%......
41-60%..1.1401.140
61-80%..11.51111.511
over 80%..36.3436.34
total..49.1249.12
AI0-20%..0.21000.2100
21-40%0.21000.3700.556
41-60%0.21000.8421.038
61-80%..1.1341.134
over 80%0.21002.3212.420
total0.5564.795.27
AR0-20%......
21-40%..0.21000.2100
41-60%..0.3700.370
61-80%..3.1193.119
over 80%0.21004.5144.713
total0.21008.168.26
BE0-20%0.4711.8322.129
21-40%0.21006.1176.217
41-60%2.72621.4924.18
61-80%6.11752.3558.35
over 80%3.42373.0476.44
total12.712154.52167.22
BL/BS0-20%......
21-40%......
41-60%..0.6570.657
61-80%..5.3175.317
over 80%..14.6714.67
total..20.5420.54
FR0-20%......
21-40%..0.6580.658
41-60%0.21004.8195.018
61-80%0.75011.41112.111
over 80%0.65824.0624.56
total1.53540.7342.23
GE0-20%......
21-40%......
41-60%..0.21000.2100
61-80%......
over 80%..2.4212.421
total..2.7182.718
GL0-20%0.21000.21000.370
21-40%0.3700.7491.040
41-60%0.9443.3224.219
61-80%1.0402.3263.321
over 80%1.7305.1166.813
total4.21911.5915.77
GR0-20%0.21002.9243.123
21-40%2.42723.9826.38
41-60%6.41642.2648.65
61-80%9.31344.4653.85
over 80%2.82526.7829.47
total21.19140.12161.22
JU0-20%..0.21000.2100
21-40%..0.4710.471
41-60%..2.7252.725
61-80%0.4717.3147.614
over 80%0.55722.6623.15
total0.94433.1333.93
LU0-20%..0.21000.2100
21-40%..1.9301.930
41-60%0.21003.0243.123
61-80%..12.31012.310
over 80%0.37123.1623.46
total0.55840.5341.03
NE0-20%..0.5580.558
21-40%0.21000.7500.944
41-60%..3.5213.521
61-80%0.47011.61012.010
over 80%0.55711.31011.810
total1.14027.6328.73
NW0-20%0.2100..0.2100
21-40%..0.6560.656
41-60%..1.2391.239
61-80%0.21002.0282.227
over 80%0.8482.9213.718
total1.2386.7107.87
OW0-20%..0.5580.558
21-40%..1.4351.435
41-60%0.7504.0194.617
61-80%0.3706.0146.414
over 80%0.7495.5156.214
total1.73117.4519.14
SG0-20%..1.1411.141
21-40%0.21001.9302.129
41-60%0.9447.7148.613
61-80%1.04115.6916.69
over 80%2.12823.4725.57
total4.22049.6353.83
SH0-20%..0.21000.2100
21-40%..0.4710.471
41-60%......
61-80%..2.8242.824
over 80%..9.689.68
total..13.0413.04
SO0-20%......
21-40%......
41-60%..0.9450.945
61-80%..5.2175.217
over 80%0.210026.2426.34
total0.210032.3332.43
SZ0-20%..0.7500.750
21-40%0.21001.8312.030
41-60%0.21003.9204.120
61-80%0.4708.8139.112
over 80%1.14011.31012.39
total1.83126.5428.24
TG0-20%..0.3700.370
21-40%..0.7490.749
41-60%..1.5331.533
61-80%..6.4146.414
over 80%..12.1812.18
total..20.9420.94
TI0-20%..1.1411.141
21-40%1.4356.1177.515
41-60%2.72616.71019.49
61-80%2.92532.3735.16
over 80%1.83144.2546.05
total8.714100.42109.22
UR0-20%..0.7500.750
21-40%0.7491.6332.427
41-60%0.7493.1233.820
61-80%2.2284.0206.215
over 80%0.5572.9243.521
total4.21912.4916.67
VD0-20%..1.4351.435
21-40%0.4716.9167.215
41-60%0.75015.71016.410
61-80%1.93025.5727.57
over 80%1.93041.7543.75
total4.91891.3296.22
VS0-20%0.3712.7253.123
21-40%2.42710.31212.711
41-60%5.11820.6825.67
61-80%9.41327.2736.66
over 80%5.91719.4925.37
total23.1880.23103.32
ZG0-20%......
21-40%..0.21000.2100
41-60%......
61-80%..1.7281.728
over 80%0.21003.8144.013
total0.21005.775.86
ZH0-20%..0.4710.471
21-40%..0.7500.750
41-60%..3.0243.024
61-80%..11.01111.011
over 80%..34.8434.84
total..49.9249.92
Switzerland0-20%1.23815.21116.510
21-40%8.51467.1575.75
41-60%21.49162.23183.73
61-80%36.37311.02347.32
over 80%25.38483.51508.91
total92.841039.211131.91

calculated by unit of reference: canton

© WSL, Swiss National Forest Inventory, 04.11.2014 #157426/143805

NFI2

forest area: avalanches SilvaProtect, modelled and assigned · degree of cover (aerial photo, 5 classes) · production region
unit: %
unit of evaluation: accessible forest excluding shrub forest
grid: terrestrial grid NFI2
state 1993/95
production region
JuraPlateauPre-AlpsAlpsSouthern AlpsSwitzerland
avalanches SilvaProtect, modelled and assigneddegree of cover (aerial photo, 5 classes) %± %± %± %± %± %±
inside perimeter0-20%....1.41.31.70.7..1.30.5
21-40%4.03.9..1.41.310.31.613.74.09.21.3
41-60%3.93.8..23.04.922.22.234.35.623.11.8
61-80%40.09.8..35.15.640.52.635.65.639.12.1
over 80%52.110.0..39.25.725.32.316.44.327.31.9
total100.0...100.0.100.0.100.0.100.0.
outside perimeter0-20%0.70.30.50.21.10.33.00.41.30.41.50.2
21-40%3.30.51.10.34.50.613.90.97.61.06.50.3
41-60%9.00.94.50.616.51.127.61.118.11.515.70.5
61-80%28.21.422.51.236.41.432.21.231.11.830.00.6
over 80%58.71.571.31.341.61.523.21.041.91.946.40.6
total100.0.100.0.100.0.100.0.100.0.100.0.
total0-20%0.70.30.50.21.20.32.80.41.20.41.50.1
21-40%3.30.51.10.34.30.613.30.88.21.06.70.3
41-60%8.90.94.50.616.81.126.61.019.61.416.30.5
61-80%28.51.422.51.236.31.433.71.131.61.730.70.6
over 80%58.61.571.31.341.41.423.60.939.51.844.80.6
total100.0.100.0.100.0.100.0.100.0.100.0.

calculated by unit of reference: production region

© WSL, Swiss National Forest Inventory, 04.11.2014 #157427/143806

NFI2

forest area: avalanches SilvaProtect, modelled and assigned · degree of cover (aerial photo, 5 classes) · production region
unit: 1000 ha
unit of evaluation: accessible forest excluding shrub forest
grid: terrestrial grid NFI2
state 1993/95
production region
JuraPlateauPre-AlpsAlpsSouthern AlpsSwitzerland
avalanches SilvaProtect, modelled and assigneddegree of cover (aerial photo, 5 classes)1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %
inside perimeter0-20%....0.21001.041..1.238
21-40%0.2100..0.21006.4161.8328.514
41-60%0.2100..3.02413.9114.42021.59
61-80%1.832..4.61925.384.61936.37
over 80%2.428..5.11815.8102.12925.48
total4.520..13.11162.3512.91192.94
outside perimeter0-20%1.4351.2382.3288.7141.63315.211
21-40%6.5162.6269.01440.069.41367.55
41-60%17.61010.41333.3779.1422.28162.53
61-80%55.2551.8573.6492.3438.36311.12
over 80%114.93163.8284.0466.6551.55480.81
total195.61229.81202.21286.72122.921037.21
total0-20%1.4351.2382.5279.7131.63316.510
21-40%6.7162.6269.21446.4611.11276.05
41-60%17.81010.41336.3793.0426.68184.03
61-80%57.0551.8578.24117.6342.86347.42
over 80%117.33163.8289.2482.3453.65506.21
total200.11229.81215.31349.01135.821130.01

calculated by unit of reference: production region

© WSL, Swiss National Forest Inventory, 04.11.2014 #157428/143807

NFI2

forest area: avalanches SilvaProtect, modelled and assigned · degree of cover (aerial photo, 5 classes) · protection forest region
unit: %
unit of evaluation: accessible forest excluding shrub forest
grid: terrestrial grid NFI2
state 1993/95
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern AlpsSwitzerland
avalanches SilvaProtect, modelled and assigneddegree of cover (aerial photo, 5 classes) %± %± %± %± %± %± %±
inside perimeter0-20%..2.71.51.11.11.51.01.01.0..1.30.5
21-40%4.03.92.71.510.33.310.32.612.33.313.74.09.21.2
41-60%4.03.921.43.918.74.221.93.527.64.534.35.623.21.8
61-80%40.09.841.14.729.84.940.84.244.95.035.65.639.12.1
over 80%52.010.032.14.440.15.325.53.714.33.516.44.327.31.9
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeter0-20%0.60.21.70.42.50.63.40.82.10.51.30.41.50.2
21-40%2.10.36.30.85.90.912.91.517.61.57.61.06.50.3
41-60%6.50.520.21.316.81.525.72.031.31.818.11.515.70.5
61-80%25.10.936.61.531.21.833.92.232.71.831.11.830.00.6
over 80%65.61.035.21.543.61.924.22.016.31.441.91.946.40.6
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
total0-20%0.60.21.80.42.30.63.00.71.90.51.20.41.50.1
21-40%2.20.36.00.76.40.912.31.316.91.38.21.06.70.3
41-60%6.50.520.41.217.01.424.81.730.91.719.61.416.30.5
61-80%25.20.937.01.531.11.735.41.934.21.731.61.730.70.6
over 80%65.51.034.91.443.21.824.51.716.01.339.51.844.80.6
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.

calculated by unit of reference: protection forest region

© WSL, Swiss National Forest Inventory, 04.11.2014 #157429/143808

NFI2

forest area: avalanches SilvaProtect, modelled and assigned · degree of cover (aerial photo, 5 classes) · protection forest region
unit: 1000 ha
unit of evaluation: accessible forest excluding shrub forest
grid: terrestrial grid NFI2
state 1993/95
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern AlpsSwitzerland
avalanches SilvaProtect, modelled and assigneddegree of cover (aerial photo, 5 classes)1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %
inside perimeter0-20%..0.5580.21000.3710.2100..1.238
21-40%0.21000.5581.5332.4272.1291.8328.514
41-60%0.21004.3202.8255.1184.7194.42021.59
61-80%1.8328.3154.5199.4137.7154.61936.27
over 80%2.3286.5166.0175.9172.4272.12925.38
total4.52020.2915.01023.1817.11012.91192.74
outside perimeter0-20%2.7263.1242.8252.7252.4271.63315.211
21-40%9.11411.4126.61610.31220.799.41367.45
41-60%27.8836.3718.8920.6836.9622.28162.63
61-80%106.7465.6535.0627.2738.5638.36311.22
over 80%279.3263.1548.9519.4919.2951.55481.31
total425.61179.52112.0280.23117.72122.921037.81
total0-20%2.7263.6222.9243.1232.6261.63316.510
21-40%9.31411.9128.11412.71122.8811.11275.95
41-60%28.0840.6621.6825.6741.6626.68184.13
61-80%108.5473.9439.4636.6646.1542.86347.52
over 80%281.6269.6454.9425.3721.6853.65506.61
total430.01199.71127.02103.32134.82135.821130.51

calculated by unit of reference: protection forest region

© WSL, Swiss National Forest Inventory, 04.11.2014 #157430/143809

NFI2

forest area: avalanches SilvaProtect, modelled and assigned · degree of cover (aerial photo, 5 classes) · economic region
unit: %
unit of evaluation: accessible forest excluding shrub forest
grid: terrestrial grid NFI2
state 1993/95
avalanches SilvaProtect, modelled and assigned
inside perimeteroutside perimetertotal
economic regiondegree of cover (aerial photo, 5 classes) %± %± %±
Western Jura0-20%..0.80.30.80.3
21-40%4.03.94.10.74.10.7
41-60%4.03.911.11.110.91.1
61-80%40.09.829.11.629.41.6
over 80%52.010.054.91.754.81.7
total100.0.100.0.100.0.
Eastern Jura0-20%..0.40.40.40.4
21-40%..0.80.50.80.5
41-60%..2.00.92.00.9
61-80%..25.22.825.22.8
over 80%..71.62.971.62.9
total..100.0.100.0.
Western Plateau0-20%..0.70.50.70.5
21-40%..1.50.71.50.7
41-60%..6.91.56.91.5
61-80%..22.92.522.92.5
over 80%..68.02.868.02.8
total..100.0.100.0.
Central Plateau0-20%......
21-40%..0.70.40.70.4
41-60%..2.20.72.20.7
61-80%..20.02.020.02.0
over 80%..77.12.177.12.1
total..100.0.100.0.
Eastern Plateau0-20%..0.80.40.80.4
21-40%..1.30.51.30.5
41-60%..5.00.95.00.9
61-80%..24.11.724.11.7
over 80%..68.91.968.91.9
total..100.0.100.0.
Western Pre-Alps0-20%..0.50.50.40.4
21-40%..6.01.65.41.5
41-60%12.06.522.32.821.22.6
61-80%52.010.033.93.235.83.1
over 80%36.09.637.23.337.13.1
total100.0.100.0.100.0.
Central Pre-Alps0-20%3.23.21.10.51.20.5
21-40%..4.90.94.60.9
41-60%29.08.217.51.618.11.6
61-80%32.38.439.32.138.92.1
over 80%35.58.637.22.137.12.0
total100.0.100.0.100.0.
Eastern Pre-Alps0-20%..1.50.61.40.6
21-40%5.65.43.00.93.20.9
41-60%27.810.611.91.612.61.6
61-80%16.78.833.92.433.12.3
over 80%50.011.849.72.549.72.5
total100.0.100.0.100.0.
Northwestern Alps0-20%3.62.54.11.34.01.1
21-40%5.43.09.81.98.91.6
41-60%21.45.524.32.723.82.5
61-80%41.16.632.93.034.42.7
over 80%28.56.028.92.928.82.6
total100.0.100.0.100.0.
Central Alps0-20%..5.22.14.01.6
21-40%15.26.311.32.912.12.7
41-60%15.26.320.03.718.93.2
61-80%42.48.628.74.231.73.8
over 80%27.37.834.84.533.13.9
total100.0.100.0.100.0.
Northeastern Alps0-20%2.82.72.91.52.91.3
21-40%8.34.69.32.59.12.2
41-60%16.86.328.03.825.73.3
61-80%24.97.225.73.725.63.3
over 80%47.18.334.14.036.73.6
total100.0.100.0.100.0.
Southwestern Alps0-20%1.51.03.40.83.00.7
21-40%10.32.612.91.512.31.3
41-60%21.93.525.72.024.81.7
61-80%40.84.233.92.235.41.9
over 80%25.53.724.22.024.51.7
total100.0.100.0.100.0.
Southeastern Alps0-20%1.01.02.10.51.90.5
21-40%12.33.317.61.516.91.3
41-60%27.64.531.31.830.91.7
61-80%44.95.032.71.834.21.7
over 80%14.33.516.31.416.01.3
total100.0.100.0.100.0.
Southern Alps0-20%..1.30.41.20.4
21-40%13.74.07.61.08.21.0
41-60%34.35.618.11.519.61.4
61-80%35.65.631.11.831.61.7
over 80%16.44.341.91.939.51.8
total100.0.100.0.100.0.
Switzerland0-20%1.30.51.50.21.50.1
21-40%9.21.36.50.36.70.3
41-60%23.11.815.70.516.30.4
61-80%39.12.130.00.630.80.6
over 80%27.31.946.30.644.80.6
total100.0.100.0.100.0.

calculated by unit of reference: economic region

© WSL, Swiss National Forest Inventory, 04.11.2014 #157431/143810

NFI2

forest area: avalanches SilvaProtect, modelled and assigned · degree of cover (aerial photo, 5 classes) · economic region
unit: 1000 ha
unit of evaluation: accessible forest excluding shrub forest
grid: terrestrial grid NFI2
state 1993/95
avalanches SilvaProtect, modelled and assigned
inside perimeteroutside perimetertotal
economic regiondegree of cover (aerial photo, 5 classes)1000 ha± %1000 ha± %1000 ha± %
Western Jura0-20%..1.2381.238
21-40%0.21006.1176.217
41-60%0.210016.41016.610
61-80%1.83143.1644.95
over 80%2.32881.4383.73
total4.520148.21152.61
Eastern Jura0-20%..0.21000.2100
21-40%..0.4710.471
41-60%..1.0441.044
61-80%..12.01112.011
over 80%..34.0534.05
total..47.5247.52
Western Plateau0-20%..0.4710.471
21-40%..0.7500.750
41-60%..3.4223.422
61-80%..11.41111.411
over 80%..33.8533.85
total..49.7349.73
Central Plateau0-20%......
21-40%..0.5580.558
41-60%..1.5331.533
61-80%..13.81013.810
over 80%..53.3353.33
total..69.1269.12
Eastern Plateau0-20%..0.9450.945
21-40%..1.4351.435
41-60%..5.5185.518
61-80%..26.7726.77
over 80%..76.4376.43
total..111.02111.02
Western Pre-Alps0-20%..0.21000.2100
21-40%..2.3272.327
41-60%0.5588.6139.213
61-80%2.32713.11015.59
over 80%1.63314.41016.09
total4.51938.7443.23
Central Pre-Alps0-20%0.21001.1411.238
21-40%..4.6194.619
41-60%1.63316.51018.19
61-80%1.83137.1638.96
over 80%2.03035.2637.16
total5.51894.62100.12
Eastern Pre-Alps0-20%..1.0411.041
21-40%0.21002.1292.327
41-60%0.9458.2149.113
61-80%0.55823.3823.87
over 80%1.63334.2635.85
total3.12368.9272.02
Northwestern Alps0-20%0.4711.9312.229
21-40%0.6584.5205.019
41-60%2.22811.11213.411
61-80%4.32015.01019.39
over 80%3.02513.21116.210
total10.41245.7456.13
Central Alps0-20%..1.1401.140
21-40%0.9442.3273.223
41-60%0.9444.2205.118
61-80%2.5266.0168.513
over 80%1.6337.2148.913
total6.01620.8726.85
Northeastern Alps0-20%0.21000.7500.945
21-40%0.5572.2272.724
41-60%1.0416.7157.714
61-80%1.5336.2167.714
over 80%2.9238.21311.111
total6.11624.0630.15
Southwestern Alps0-20%0.3712.7253.123
21-40%2.42710.31212.711
41-60%5.11820.6825.67
61-80%9.41327.2736.66
over 80%5.91719.4925.37
total23.1880.23103.32
Southeastern Alps0-20%0.21002.4272.626
21-40%2.12920.7922.88
41-60%4.71936.9641.66
61-80%7.71538.5646.15
over 80%2.42719.2921.68
total17.110117.72134.82
Southern Alps0-20%..1.6331.633
21-40%1.8329.41311.112
41-60%4.42022.2826.68
61-80%4.61938.3642.86
over 80%2.12951.5553.65
total12.911122.92135.82
Switzerland0-20%1.23815.31116.610
21-40%8.61467.6576.15
41-60%21.59162.83184.43
61-80%36.47311.72348.12
over 80%25.48481.41506.81
total93.241038.811132.01

calculated by unit of reference: economic region

© WSL, Swiss National Forest Inventory, 04.11.2014 #157432/143811

NFI2

forest area: avalanches SilvaProtect, modelled and assigned · time of last treatment (classes of 10 years) · biogeographical region
unit: %
unit of evaluation: accessible forest excluding shrub forest
grid: terrestrial grid NFI2
state 1993/95
biogeographical region
JuraPlateauNorthern AlpsWestern Central-AlpsEastern Central-AlpsSouthern AlpsSwitzerland
avalanches SilvaProtect, modelled and assignedtime of last treatment (classes of 10 years) %± %± %± %± %± %± %±
inside perimetern/a8.05.4..11.12.111.82.97.12.811.53.610.51.3
less than 10 years ago48.010.0..31.83.218.93.529.54.911.53.626.21.9
11-20 years ago20.08.0..22.12.814.93.218.84.211.63.618.31.7
21-30 years ago8.05.4..14.72.410.32.712.93.611.53.612.61.4
31-40 years ago8.05.4..6.01.615.73.211.83.57.73.09.51.3
41-50 years ago....5.11.56.32.22.41.65.12.54.70.9
over 50 years ago8.05.4..9.22.022.03.717.64.141.15.618.21.7
total100.0...100.0.100.0.100.0.100.0.100.0.
outside perimetern/a10.91.011.70.813.70.813.41.713.01.411.51.212.30.4
less than 10 years ago47.91.560.41.335.01.216.21.827.91.910.51.238.70.6
11-20 years ago24.11.319.71.021.51.012.91.621.21.710.41.119.60.5
21-30 years ago8.40.94.50.510.40.712.41.68.61.27.91.08.20.4
31-40 years ago3.90.61.40.35.40.511.01.56.21.09.41.15.10.3
41-50 years ago1.30.40.80.23.70.510.01.54.00.813.61.34.20.3
over 50 years ago3.50.61.60.310.30.724.22.119.11.736.71.811.90.4
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totaln/a10.80.911.70.813.40.813.01.412.21.311.51.112.20.4
less than 10 years ago47.91.560.41.334.71.116.81.628.11.810.61.137.70.6
11-20 years ago24.01.319.71.021.60.913.31.520.91.610.51.119.50.5
21-30 years ago8.30.84.50.510.90.711.91.49.21.18.21.08.60.3
31-40 years ago4.00.61.40.35.40.512.11.46.91.09.21.05.40.3
41-50 years ago1.30.30.80.23.80.49.11.23.80.812.81.24.20.2
over 50 years ago3.60.61.60.310.20.723.71.818.91.637.11.712.40.4
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.

calculated by unit of reference: biogeographical region

© WSL, Swiss National Forest Inventory, 04.11.2014 #157433/143812

NFI2

forest area: avalanches SilvaProtect, modelled and assigned · time of last treatment (classes of 10 years) · biogeographical region
unit: 1000 ha
unit of evaluation: accessible forest excluding shrub forest
grid: terrestrial grid NFI2
state 1993/95
biogeographical region
JuraPlateauNorthern AlpsWestern Central-AlpsEastern Central-AlpsSouthern AlpsSwitzerland
avalanches SilvaProtect, modelled and assignedtime of last treatment (classes of 10 years)1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %
inside perimetern/a0.471..4.3202.5261.0411.6339.813
less than 10 years ago2.229..12.2124.1204.4201.63324.48
11-20 years ago0.945..8.5143.2232.8251.63317.010
21-30 years ago0.471..5.7182.2281.9301.63311.712
31-40 years ago0.471..2.3283.4221.7311.1418.814
41-50 years ago....1.9301.4350.3710.7504.420
over 50 years ago0.471..3.5224.7192.6265.71716.910
total4.520..38.4621.5814.81013.81193.04
outside perimetern/a20.6930.0741.169.51312.41114.511128.14
less than 10 years ago90.63154.92104.9411.51226.7713.311401.82
11-20 years ago45.6650.5564.459.21320.2913.111203.03
21-30 years ago15.81011.51231.178.8138.2149.91385.34
31-40 years ago7.4153.52216.1107.8145.91711.81252.66
41-50 years ago2.5272.12911.0137.1153.82117.11043.76
over 50 years ago6.6164.12131.0717.3918.3946.25123.53
total189.21256.61299.6171.2395.53126.021038.11
totaln/a21.0930.0745.3612.11113.41116.110137.93
less than 10 years ago92.73154.92117.1315.61031.0714.910426.22
11-20 years ago46.5650.5572.9412.41123.0814.711220.03
21-30 years ago16.21011.51236.8711.01210.11311.51297.14
31-40 years ago7.7153.52218.41011.2127.71512.91161.45
41-50 years ago2.5272.12912.9128.5144.22017.9948.06
over 50 years ago7.0164.12134.5722.0820.9951.95140.43
total193.61256.61338.0192.72110.42139.821131.11

calculated by unit of reference: biogeographical region

© WSL, Swiss National Forest Inventory, 04.11.2014 #157434/143813

NFI2

forest area: avalanches SilvaProtect, modelled and assigned · time of last treatment (classes of 10 years) · canton
unit: %
unit of evaluation: accessible forest excluding shrub forest
grid: terrestrial grid NFI2
state 1993/95
avalanches SilvaProtect, modelled and assigned
inside perimeteroutside perimetertotal
cantontime of last treatment (classes of 10 years) %± %± %±
AGn/a..9.11.89.11.8
less than 10 years ago..66.42.966.42.9
11-20 years ago..16.22.316.22.3
21-30 years ago..3.81.23.81.2
31-40 years ago..1.90.81.90.8
41-50 years ago..1.10.71.10.7
over 50 years ago..1.50.81.50.8
total..100.0.100.0.
AIn/a..17.27.115.66.5
less than 10 years ago33.327.524.18.025.07.7
11-20 years ago..34.58.931.38.2
21-30 years ago66.727.413.86.518.87.0
31-40 years ago......
41-50 years ago..6.94.86.34.3
over 50 years ago..3.43.43.13.1
total100.0.100.0.100.0.
ARn/a..13.94.913.74.8
less than 10 years ago100.0.41.86.942.96.9
11-20 years ago..28.46.427.86.3
21-30 years ago..9.94.39.84.2
31-40 years ago..2.02.02.01.9
41-50 years ago......
over 50 years ago..4.02.83.92.7
total100.0.100.0.100.0.
BEn/a8.53.311.81.111.51.0
less than 10 years ago35.25.747.01.746.11.6
11-20 years ago26.85.322.41.422.71.4
21-30 years ago15.54.37.60.98.20.9
31-40 years ago5.62.73.90.74.10.6
41-50 years ago2.82.01.70.41.80.4
over 50 years ago5.62.75.50.85.50.7
total100.0.100.0.100.0.
BL/BSn/a..10.53.010.53.0
less than 10 years ago..43.34.943.34.9
11-20 years ago..32.84.632.84.6
21-30 years ago..5.62.35.62.3
31-40 years ago..5.82.35.82.3
41-50 years ago..1.01.01.01.0
over 50 years ago..1.01.01.01.0
total..100.0.100.0.
FRn/a25.015.310.92.111.32.1
less than 10 years ago37.517.142.93.342.83.3
11-20 years ago37.517.120.42.721.02.7
21-30 years ago..12.72.212.22.2
31-40 years ago..4.51.44.41.4
41-50 years ago..3.21.23.11.1
over 50 years ago..5.41.55.21.5
total100.0.100.0.100.0.
GEn/a..28.014.228.014.2
less than 10 years ago..25.313.225.313.2
11-20 years ago......
21-30 years ago..9.39.29.39.2
31-40 years ago..9.39.29.39.2
41-50 years ago..28.014.128.014.1
over 50 years ago......
total..100.0.100.0.
GLn/a12.56.816.84.615.73.8
less than 10 years ago29.19.330.35.730.04.8
11-20 years ago12.56.827.25.523.34.4
21-30 years ago12.56.86.02.97.82.8
31-40 years ago8.35.79.13.58.93.0
41-50 years ago8.35.71.51.53.31.9
over 50 years ago16.87.79.13.511.13.3
total100.0.100.0.100.0.
GRn/a9.02.613.21.212.71.1
less than 10 years ago22.23.826.61.626.01.4
11-20 years ago22.93.818.91.419.41.3
21-30 years ago11.52.98.51.08.90.9
31-40 years ago9.02.67.40.97.60.9
41-50 years ago4.11.85.50.85.30.7
over 50 years ago21.33.719.91.420.11.3
total100.0.100.0.100.0.
JUn/a..10.82.310.52.2
less than 10 years ago40.021.937.63.637.73.5
11-20 years ago40.021.930.63.430.93.4
21-30 years ago20.017.910.22.210.52.2
31-40 years ago..4.31.54.21.5
41-50 years ago..2.21.12.11.0
over 50 years ago..4.31.54.21.5
total100.0.100.0.100.0.
LUn/a..12.92.212.72.2
less than 10 years ago..44.23.343.63.2
11-20 years ago66.727.327.52.928.02.9
21-30 years ago33.327.39.41.99.71.9
31-40 years ago..1.70.91.70.8
41-50 years ago......
over 50 years ago..4.31.34.31.3
total100.0.100.0.100.0.
NEn/a16.715.310.82.511.02.5
less than 10 years ago83.315.264.33.865.03.7
11-20 years ago..16.63.016.02.9
21-30 years ago..4.51.74.31.6
31-40 years ago..1.30.91.20.9
41-50 years ago..1.30.91.20.9
over 50 years ago..1.30.91.20.9
total100.0.100.0.100.0.
NWn/a16.715.414.86.215.05.7
less than 10 years ago66.719.341.08.544.97.9
11-20 years ago..17.76.615.05.7
21-30 years ago......
31-40 years ago......
41-50 years ago..8.94.97.54.2
over 50 years ago16.715.417.76.617.56.1
total100.0.100.0.100.0.
OWn/a10.29.712.93.312.63.2
less than 10 years ago19.912.732.74.631.54.4
11-20 years ago19.912.719.84.019.83.8
21-30 years ago10.09.58.92.89.02.7
31-40 years ago10.09.55.92.46.32.3
41-50 years ago19.912.73.01.74.52.0
over 50 years ago10.09.516.83.716.23.5
total100.0.100.0.100.0.
SGn/a16.77.613.02.013.31.9
less than 10 years ago20.88.338.02.936.72.7
11-20 years ago33.39.624.72.625.32.5
21-30 years ago12.56.87.01.57.51.5
31-40 years ago4.24.14.21.24.21.1
41-50 years ago8.35.63.91.14.21.1
over 50 years ago4.24.19.11.78.81.6
total100.0.100.0.100.0.
SHn/a..10.33.710.33.7
less than 10 years ago..55.76.155.76.1
11-20 years ago..29.45.729.45.7
21-30 years ago..1.51.51.51.5
31-40 years ago..1.51.51.51.5
41-50 years ago..1.51.51.51.5
over 50 years ago......
total..100.0.100.0.
SOn/a..12.32.412.32.4
less than 10 years ago..53.73.753.43.7
11-20 years ago..24.33.224.23.1
21-30 years ago..4.31.54.31.5
31-40 years ago..3.21.33.21.3
41-50 years ago..0.50.50.50.5
over 50 years ago100.0.1.60.92.11.1
total100.0.100.0.100.0.
SZn/a10.09.512.82.812.72.6
less than 10 years ago40.015.535.13.935.43.8
11-20 years ago10.09.520.33.319.63.2
21-30 years ago10.09.59.52.49.52.3
31-40 years ago10.09.58.12.28.22.2
41-50 years ago..6.12.05.71.8
over 50 years ago20.012.78.12.28.92.3
total100.0.100.0.100.0.
TGn/a..8.82.58.82.5
less than 10 years ago..63.14.363.14.3
11-20 years ago..23.23.823.23.8
21-30 years ago..3.21.63.21.6
31-40 years ago......
41-50 years ago......
over 50 years ago..1.71.21.71.2
total..100.0.100.0.
TIn/a10.24.311.01.311.01.3
less than 10 years ago12.24.79.21.29.51.2
11-20 years ago4.12.810.01.39.51.2
21-30 years ago14.35.08.01.18.51.1
31-40 years ago10.24.39.11.29.21.2
41-50 years ago2.02.013.91.512.91.4
over 50 years ago46.97.138.92.139.52.0
total100.0.100.0.100.0.
URn/a17.47.919.14.818.64.1
less than 10 years ago30.49.630.95.630.84.9
11-20 years ago4.34.313.34.111.03.3
21-30 years ago21.78.611.73.914.33.7
31-40 years ago13.07.0..3.31.9
41-50 years ago4.34.33.02.13.31.9
over 50 years ago8.75.922.15.018.74.1
total100.0.100.0.100.0.
VDn/a3.63.513.51.513.01.4
less than 10 years ago46.49.442.52.242.72.1
11-20 years ago21.47.818.31.718.51.7
21-30 years ago7.14.911.41.411.21.3
31-40 years ago7.14.94.10.94.20.9
41-50 years ago7.14.92.70.72.90.7
over 50 years ago7.14.97.51.27.51.1
total100.0.100.0.100.0.
VSn/a11.72.713.71.613.31.4
less than 10 years ago19.03.318.31.818.51.6
11-20 years ago14.63.013.01.513.41.4
21-30 years ago11.82.812.91.512.61.3
31-40 years ago15.33.110.31.411.41.3
41-50 years ago5.82.09.31.38.51.1
over 50 years ago21.93.522.51.922.31.7
total100.0.100.0.100.0.
ZGn/a..14.76.214.36.0
less than 10 years ago100.0.58.88.460.08.2
11-20 years ago..17.66.617.16.4
21-30 years ago..5.94.15.74.0
31-40 years ago......
41-50 years ago......
over 50 years ago..2.92.92.92.9
total100.0.100.0.100.0.
ZHn/a..12.52.012.52.0
less than 10 years ago..65.82.865.82.8
11-20 years ago..15.32.115.32.1
21-30 years ago..4.31.24.31.2
31-40 years ago..1.40.71.40.7
41-50 years ago......
over 50 years ago..0.70.50.70.5
total..100.0.100.0.
Switzerlandn/a10.51.312.30.412.20.4
less than 10 years ago26.31.938.70.637.70.6
11-20 years ago18.21.719.50.519.40.5
21-30 years ago12.61.48.20.48.60.3
31-40 years ago9.51.35.10.35.40.3
41-50 years ago4.70.94.20.34.30.2
over 50 years ago18.21.711.90.412.40.4
total100.0.100.0.100.0.

calculated by unit of reference: canton

© WSL, Swiss National Forest Inventory, 04.11.2014 #157435/143814

NFI2

forest area: avalanches SilvaProtect, modelled and assigned · time of last treatment (classes of 10 years) · canton
unit: 1000 ha
unit of evaluation: accessible forest excluding shrub forest
grid: terrestrial grid NFI2
state 1993/95
avalanches SilvaProtect, modelled and assigned
inside perimeteroutside perimetertotal
cantontime of last treatment (classes of 10 years)1000 ha± %1000 ha± %1000 ha± %
AGn/a..4.5204.520
less than 10 years ago..32.6532.65
11-20 years ago..8.0148.014
21-30 years ago..1.9311.931
31-40 years ago..0.9440.944
41-50 years ago..0.6580.658
over 50 years ago..0.7500.750
total..49.1249.12
AIn/a..0.8420.842
less than 10 years ago0.21001.1341.332
11-20 years ago..1.6271.627
21-30 years ago0.3700.6481.038
31-40 years ago......
41-50 years ago..0.3700.370
over 50 years ago..0.21000.2100
total0.5564.795.27
ARn/a..1.1361.136
less than 10 years ago0.21003.4173.517
11-20 years ago..2.3242.324
21-30 years ago..0.8430.843
31-40 years ago..0.21000.2100
41-50 years ago......
over 50 years ago..0.3700.370
total0.21008.168.26
BEn/a1.14118.2919.39
less than 10 years ago4.52072.6477.14
11-20 years ago3.42334.6738.06
21-30 years ago2.03011.81213.711
31-40 years ago0.7506.1176.816
41-50 years ago0.4712.7263.024
over 50 years ago0.7508.6149.314
total12.712154.52167.22
BL/BSn/a..2.1292.129
less than 10 years ago..8.9128.912
11-20 years ago..6.7146.714
21-30 years ago..1.2401.240
31-40 years ago..1.2401.240
41-50 years ago..0.21000.2100
over 50 years ago..0.21000.2100
total..20.5420.54
FRn/a0.4714.4204.819
less than 10 years ago0.65817.5818.08
11-20 years ago0.6588.3148.913
21-30 years ago..5.2185.218
31-40 years ago..1.8311.831
41-50 years ago..1.3371.337
over 50 years ago..2.2282.228
total1.53540.7342.23
GEn/a..0.7530.753
less than 10 years ago..0.7570.757
11-20 years ago......
21-30 years ago..0.21000.2100
31-40 years ago..0.21000.2100
41-50 years ago..0.7530.753
over 50 years ago......
total..2.7182.718
GLn/a0.5571.9302.526
less than 10 years ago1.2373.5214.717
11-20 years ago0.5573.1223.720
21-30 years ago0.5570.7491.237
31-40 years ago0.3701.0401.434
41-50 years ago0.3700.21000.557
over 50 years ago0.7501.0401.831
total4.21911.5915.77
GRn/a1.93018.5920.49
less than 10 years ago4.71937.2641.96
11-20 years ago4.81926.5831.37
21-30 years ago2.42711.91214.411
31-40 years ago1.93010.41312.311
41-50 years ago0.9457.8158.614
over 50 years ago4.51927.8732.37
total21.19140.12161.22
JUn/a..3.6213.621
less than 10 years ago0.47112.41012.810
11-20 years ago0.47110.11110.511
21-30 years ago0.21003.4223.621
31-40 years ago..1.4351.435
41-50 years ago..0.7500.750
over 50 years ago..1.4351.435
total0.94433.1333.93
LUn/a..5.2175.217
less than 10 years ago..17.9817.98
11-20 years ago0.37111.11111.511
21-30 years ago0.21003.8214.020
31-40 years ago..0.7500.750
41-50 years ago......
over 50 years ago..1.7311.731
total0.55840.5341.03
NEn/a0.21003.0233.223
less than 10 years ago0.94417.8718.76
11-20 years ago..4.6184.618
21-30 years ago..1.2371.237
31-40 years ago..0.4710.471
41-50 years ago..0.4700.470
over 50 years ago..0.4700.470
total1.14027.6328.73
NWn/a0.21001.0431.239
less than 10 years ago0.8482.7233.519
11-20 years ago..1.2381.238
21-30 years ago......
31-40 years ago......
41-50 years ago..0.6560.656
over 50 years ago0.21001.2381.435
total1.2386.7107.87
OWn/a0.21002.2272.426
less than 10 years ago0.3705.7156.014
11-20 years ago0.3703.4213.820
21-30 years ago0.21001.5321.730
31-40 years ago0.21001.0401.237
41-50 years ago0.3700.5570.944
over 50 years ago0.21002.9233.122
total1.73117.4519.14
SGn/a0.7506.5167.215
less than 10 years ago0.94418.9819.78
11-20 years ago1.43512.21113.610
21-30 years ago0.5583.5224.020
31-40 years ago0.21002.1282.327
41-50 years ago0.3711.9302.327
over 50 years ago0.21004.5194.719
total4.22049.6353.83
SHn/a..1.3371.337
less than 10 years ago..7.2117.211
11-20 years ago..3.8203.820
21-30 years ago..0.21000.2100
31-40 years ago..0.21000.2100
41-50 years ago..0.21000.2100
over 50 years ago......
total..13.0413.04
SOn/a..4.0204.020
less than 10 years ago..17.3717.37
11-20 years ago..7.8137.813
21-30 years ago..1.4351.435
31-40 years ago..1.0401.040
41-50 years ago..0.21000.2100
over 50 years ago0.21000.5570.750
total0.210032.3332.43
SZn/a0.21003.4223.622
less than 10 years ago0.7509.31210.011
11-20 years ago0.21005.4175.517
21-30 years ago0.21002.5262.725
31-40 years ago0.21002.1282.327
41-50 years ago..1.6331.633
over 50 years ago0.4702.1282.526
total1.83126.5428.24
TGn/a..1.8291.829
less than 10 years ago..13.2813.28
11-20 years ago..4.9174.917
21-30 years ago..0.7490.749
31-40 years ago......
41-50 years ago......
over 50 years ago..0.3710.371
total..20.9420.94
TIn/a0.94511.11212.012
less than 10 years ago1.1419.31310.413
11-20 years ago0.47110.01310.413
21-30 years ago1.2388.0149.313
31-40 years ago0.9459.11410.013
41-50 years ago0.210013.91114.111
over 50 years ago4.12139.0643.15
total8.714100.42109.22
URn/a0.7492.4273.123
less than 10 years ago1.3373.8215.117
11-20 years ago0.21001.6321.831
21-30 years ago0.9441.5352.427
31-40 years ago0.557..0.557
41-50 years ago0.21000.4700.557
over 50 years ago0.4702.7253.123
total4.21912.4916.67
VDn/a0.210012.31112.511
less than 10 years ago2.32738.8641.15
11-20 years ago1.14116.7917.89
21-30 years ago0.47110.41210.712
31-40 years ago0.4713.7224.121
41-50 years ago0.4712.5272.825
over 50 years ago0.4716.9167.215
total4.91891.3296.22
VSn/a2.72511.01213.711
less than 10 years ago4.41914.71019.19
11-20 years ago3.42210.51213.811
21-30 years ago2.72510.31213.011
31-40 years ago3.5228.31411.811
41-50 years ago1.3357.4158.813
over 50 years ago5.11818.0923.18
total23.1880.23103.32
ZGn/a..0.8420.842
less than 10 years ago0.21003.3163.515
11-20 years ago..1.0381.038
21-30 years ago..0.3700.370
31-40 years ago......
41-50 years ago......
over 50 years ago..0.21000.2100
total0.21005.775.86
ZHn/a..6.2166.216
less than 10 years ago..32.8532.85
11-20 years ago..7.6147.614
21-30 years ago..2.1282.128
31-40 years ago..0.7500.750
41-50 years ago......
over 50 years ago..0.4710.471
total..49.9249.92
Switzerlandn/a9.813128.24138.03
less than 10 years ago24.48402.72427.02
11-20 years ago16.910203.23220.13
21-30 years ago11.71285.2496.94
31-40 years ago8.81452.6661.45
41-50 years ago4.32044.0648.36
over 50 years ago16.910123.43140.33
total92.841039.211131.91

calculated by unit of reference: canton

© WSL, Swiss National Forest Inventory, 04.11.2014 #157436/143815

NFI2

forest area: avalanches SilvaProtect, modelled and assigned · time of last treatment (classes of 10 years) · production region
unit: %
unit of evaluation: accessible forest excluding shrub forest
grid: terrestrial grid NFI2
state 1993/95
production region
JuraPlateauPre-AlpsAlpsSouthern AlpsSwitzerland
avalanches SilvaProtect, modelled and assignedtime of last treatment (classes of 10 years) %± %± %± %± %± %±
inside perimetern/a8.05.4..12.23.810.31.610.93.710.51.3
less than 10 years ago47.910.0..33.85.525.82.312.33.826.21.9
11-20 years ago20.08.0..25.75.118.02.011.03.718.21.7
21-30 years ago8.05.4..13.54.013.11.810.93.712.61.4
31-40 years ago8.05.4..4.12.311.11.78.23.29.61.3
41-50 years ago....2.71.95.61.24.12.34.70.9
over 50 years ago8.05.4..8.13.216.11.942.55.818.31.7
total100.0...100.0.100.0.100.0.100.0.
outside perimetern/a10.80.912.10.913.11.013.30.811.61.212.30.4
less than 10 years ago48.01.561.41.338.31.426.61.110.21.138.70.6
11-20 years ago24.01.318.51.124.81.317.70.910.11.119.60.5
21-30 years ago8.70.94.00.59.80.910.30.78.01.08.20.4
31-40 years ago3.50.61.50.33.80.68.00.79.31.15.10.3
41-50 years ago1.50.40.80.23.00.55.70.613.51.34.20.3
over 50 years ago3.40.61.80.47.10.818.31.037.21.811.90.4
total100.0.100.0.100.0.100.0.100.0.100.0.
totaln/a10.80.912.10.913.11.012.80.711.61.212.20.4
less than 10 years ago48.01.561.41.338.01.426.51.010.41.137.70.6
11-20 years ago23.91.318.51.124.91.217.80.910.11.119.50.5
21-30 years ago8.70.84.00.510.00.910.80.78.31.08.60.3
31-40 years ago3.60.61.50.33.90.68.50.69.21.05.40.3
41-50 years ago1.50.40.80.23.00.55.70.512.61.24.30.2
over 50 years ago3.50.61.80.47.10.717.90.937.71.712.40.4
total100.0.100.0.100.0.100.0.100.0.100.0.

calculated by unit of reference: production region

© WSL, Swiss National Forest Inventory, 04.11.2014 #157437/143816

NFI2

forest area: avalanches SilvaProtect, modelled and assigned · time of last treatment (classes of 10 years) · production region
unit: 1000 ha
unit of evaluation: accessible forest excluding shrub forest
grid: terrestrial grid NFI2
state 1993/95
production region
JuraPlateauPre-AlpsAlpsSouthern AlpsSwitzerland
avalanches SilvaProtect, modelled and assignedtime of last treatment (classes of 10 years)1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %
inside perimetern/a0.471..1.6336.4161.4359.813
less than 10 years ago2.229..4.42016.1101.63324.38
11-20 years ago0.945..3.42311.2121.43516.910
21-30 years ago0.471..1.8328.1141.43511.712
31-40 years ago0.471..0.5586.9161.1418.914
41-50 years ago....0.4713.5220.5584.320
over 50 years ago0.471..1.14110.1135.51817.010
total4.520..13.11162.3512.91192.94
outside perimetern/a21.2927.7826.5838.3714.311128.04
less than 10 years ago93.83141.0277.5476.3412.511401.22
11-20 years ago47.0642.5650.2550.8612.412202.93
21-30 years ago17.0109.11419.8929.579.91385.34
31-40 years ago6.9163.5227.81522.9811.51252.56
41-50 years ago2.9251.8326.01716.51016.61043.76
over 50 years ago6.7164.22014.31152.4545.75123.43
total195.61229.81202.21286.72122.921037.21
totaln/a21.6927.7828.1844.7615.710137.83
less than 10 years ago96.03141.0281.9492.4414.111425.52
11-20 years ago47.9542.5653.6562.1513.811219.83
21-30 years ago17.4109.11421.6937.6711.31297.04
31-40 years ago7.3163.5228.31429.8712.51161.45
41-50 years ago2.9251.8326.41619.9917.11048.16
over 50 years ago7.1164.22015.41062.5551.25140.43
total200.11229.81215.31349.01135.821130.01

calculated by unit of reference: production region

© WSL, Swiss National Forest Inventory, 04.11.2014 #157438/143817
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