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NFI4b

forest area: avalanches SilvaProtect, modelled and assigned · stand stability · production region
unit: %
unit of evaluation: accessible forest excluding shrub forest NFI1/NFI2/NFI3/NFI4 combined
grid:
state 2009/13
production region
JuraPlateauPre-AlpsAlpsSouthern AlpsSwitzerland
avalanches SilvaProtect, modelled and assignedstand stability %± %± %± %± %± %±
inside perimetercritical....2.92.810.32.35.73.98.11.7
less stable23.111.7..62.88.245.73.842.98.446.53.1
stable76.911.7..34.38.044.03.851.48.545.43.1
total100.0...100.0.100.0.100.0.100.0.
outside perimetercritical2.30.72.50.67.11.17.21.05.91.45.00.4
less stable32.12.037.61.945.22.242.91.853.32.941.20.9
stable65.62.159.91.947.72.249.91.840.82.853.90.9
total100.0.100.0.100.0.100.0.100.0.100.0.
totalcritical2.20.62.50.66.91.17.80.95.91.35.20.4
less stable31.92.037.61.946.32.143.51.652.22.741.60.9
stable65.92.059.91.946.82.148.71.741.92.753.10.9
total100.0.100.0.100.0.100.0.100.0.100.0.

calculated by unit of reference: production region

© WSL, Swiss National Forest Inventory, 03.11.2014 #163321/149701

NFI4b

forest area: avalanches SilvaProtect, modelled and assigned · stand stability · production region
unit: 1000 ha
unit of evaluation: accessible forest excluding shrub forest NFI1/NFI2/NFI3/NFI4 combined
grid:
state 2009/13
production region
JuraPlateauPre-AlpsAlpsSouthern AlpsSwitzerland
avalanches SilvaProtect, modelled and assignedstand stability1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %
inside perimetercritical....0.41006.2230.7717.322
less stable1.158..7.92127.6115.32542.09
stable3.631..4.32926.6116.42341.09
total4.727..12.61660.5712.41690.36
outside perimetercritical4.4295.62513.71618.4136.32348.48
less stable61.3785.0586.95109.1557.06399.32
stable125.24135.7391.55126.7443.68522.72
total190.92226.31192.12254.22106.94970.41
totalcritical4.4295.62514.11624.6127.02255.78
less stable62.4685.0594.85136.7462.36441.32
stable128.93135.7395.95153.3450.07563.72
total195.71226.31204.72314.62119.331060.61

calculated by unit of reference: production region

© WSL, Swiss National Forest Inventory, 03.11.2014 #163322/149702

NFI4b

forest area: avalanches SilvaProtect, modelled and assigned · stand stability · protection forest region
unit: %
unit of evaluation: accessible forest excluding shrub forest NFI1/NFI2/NFI3/NFI4 combined
grid:
state 2009/13
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern AlpsSwitzerland
avalanches SilvaProtect, modelled and assignedstand stability %± %± %± %± %± %± %±
inside perimetercritical..5.43.05.13.514.14.19.14.35.73.98.11.7
less stable23.111.755.46.651.38.046.45.940.97.442.98.446.53.1
stable76.911.739.36.543.68.039.55.850.07.551.48.545.43.1
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimetercritical2.40.47.41.26.71.410.92.24.71.25.91.45.00.4
less stable35.11.448.72.344.52.940.13.538.32.853.32.941.20.9
stable62.51.443.92.348.82.949.13.557.02.940.82.853.80.9
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totalcritical2.40.47.21.16.51.311.71.95.31.25.91.35.20.4
less stable35.01.449.42.245.32.741.73.038.62.652.22.741.70.9
stable62.61.443.42.248.22.746.63.056.12.741.92.753.10.9
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.

calculated by unit of reference: protection forest region

© WSL, Swiss National Forest Inventory, 03.11.2014 #163323/149703

NFI4b

forest area: avalanches SilvaProtect, modelled and assigned · stand stability · protection forest region
unit: 1000 ha
unit of evaluation: accessible forest excluding shrub forest NFI1/NFI2/NFI3/NFI4 combined
grid:
state 2009/13
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern AlpsSwitzerland
avalanches SilvaProtect, modelled and assignedstand stability1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %
inside perimetercritical..1.1580.7713.4311.4500.7717.322
less stable1.15811.2186.92211.3176.3235.32542.19
stable3.6327.9215.9249.6187.7216.42341.19
total4.72820.21313.41524.41115.51412.41690.56
outside perimetercritical10.01912.6166.9227.5214.9266.32348.38
less stable146.7482.9545.9727.81039.7857.06399.92
stable260.8274.7650.4734.0959.0643.68522.42
total417.41170.22103.2369.35103.63106.94970.61
totalcritical10.01913.7167.62111.0176.3237.02255.68
less stable147.7494.1552.8739.1846.0762.36442.02
stable264.3282.6556.3643.6766.8650.07563.52
total422.11190.42116.7393.73119.03119.331061.21

calculated by unit of reference: protection forest region

© WSL, Swiss National Forest Inventory, 03.11.2014 #163324/149704

NFI4b

forest area: avalanches SilvaProtect, modelled and assigned · stand stability · economic region
unit: %
unit of evaluation: accessible forest excluding shrub forest NFI1/NFI2/NFI3/NFI4 combined
grid:
state 2009/13
avalanches SilvaProtect, modelled and assigned
inside perimeteroutside perimetertotal
economic regionstand stability %± %± %±
Western Juracritical..2.50.82.40.7
less stable23.011.731.02.330.72.3
stable77.011.766.62.366.92.3
total100.0.100.0.100.0.
Eastern Juracritical..1.71.21.71.2
less stable..36.24.436.24.4
stable..62.14.562.14.5
total..100.0.100.0.
Western Plateaucritical..2.61.52.61.5
less stable..35.04.535.04.5
stable..62.44.562.44.5
total..100.0.100.0.
Central Plateaucritical..2.71.12.71.1
less stable..38.93.338.93.3
stable..58.43.358.43.3
total..100.0.100.0.
Eastern Plateaucritical..2.30.92.30.9
less stable..37.72.837.72.8
stable..60.12.860.12.8
total..100.0.100.0.
Western Pre-Alpscritical..6.82.56.32.3
less stable49.717.750.54.950.44.8
stable50.317.742.74.943.34.7
total100.0.100.0.100.0.
Central Pre-Alpscritical5.35.19.01.88.71.7
less stable68.410.745.33.247.03.1
stable26.310.145.73.244.33.1
total100.0.100.0.100.0.
Eastern Pre-Alpscritical..4.91.64.71.5
less stable62.517.142.23.643.03.6
stable37.517.153.03.752.33.6
total100.0.100.0.100.0.
Northwestern Alpscritical6.94.74.81.95.21.8
less stable48.39.354.04.552.94.0
stable44.89.241.24.441.94.0
total100.0.100.0.100.0.
Central Alpscritical14.39.48.13.99.53.7
less stable42.913.342.17.042.36.2
stable42.913.349.87.148.26.3
total100.0.100.0.100.0.
Northeastern Alpscritical..11.14.08.73.2
less stable52.912.152.46.352.55.6
stable47.112.236.56.138.75.5
total100.0.100.0.100.0.
Southwestern Alpscritical14.14.110.92.211.71.9
less stable46.45.940.13.541.73.0
stable39.55.849.13.546.63.0
total100.0.100.0.100.0.
Southeastern Alpscritical9.14.34.71.25.31.2
less stable40.97.438.32.838.62.6
stable50.07.557.02.956.12.7
total100.0.100.0.100.0.
Southern Alpscritical5.73.95.91.45.91.3
less stable42.98.453.32.952.22.7
stable51.48.540.82.841.92.7
total100.0.100.0.100.0.
Switzerlandcritical8.01.75.00.45.20.4
less stable46.53.141.20.941.60.9
stable45.43.153.80.953.10.9
total100.0.100.0.100.0.

calculated by unit of reference: economic region

© WSL, Swiss National Forest Inventory, 03.11.2014 #163325/149705

NFI4b

forest area: avalanches SilvaProtect, modelled and assigned · stand stability · economic region
unit: 1000 ha
unit of evaluation: accessible forest excluding shrub forest NFI1/NFI2/NFI3/NFI4 combined
grid:
state 2009/13
avalanches SilvaProtect, modelled and assigned
inside perimeteroutside perimetertotal
economic regionstand stability1000 ha± %1000 ha± %1000 ha± %
Western Juracritical..3.6313.631
less stable1.15844.6845.78
stable3.63196.0499.64
total4.627144.22148.92
Eastern Juracritical..0.8700.870
less stable..17.01217.012
stable..29.2829.28
total..47.0347.03
Western Plateaucritical..1.2571.257
less stable..16.51316.513
stable..29.4829.48
total..47.2447.24
Central Plateaucritical..1.9401.940
less stable..26.7926.79
stable..40.1640.16
total..68.7268.72
Eastern Plateaucritical..2.5372.537
less stable..41.5841.58
stable..66.1566.15
total..110.12110.12
Western Pre-Alpscritical..2.6372.637
less stable1.55019.21120.710
stable1.54916.31217.812
total2.93538.1541.14
Central Pre-Alpscritical0.41007.9218.220
less stable4.72739.8844.57
stable1.84440.2842.07
total6.82287.8394.72
Eastern Pre-Alpscritical..3.2333.233
less stable1.84427.9929.69
stable1.15735.0836.17
total2.93566.1368.93
Northwestern Alpscritical0.7712.1402.935
less stable5.02623.91028.99
stable4.62718.31222.911
total10.41744.3654.74
Central Alpscritical0.7701.4502.140
less stable2.1407.3209.317
stable2.1408.61810.715
total4.82517.31122.18
Northeastern Alpscritical..2.5372.537
less stable3.23211.81515.013
stable2.9348.21911.116
total6.12222.6928.76
Southwestern Alpscritical3.4317.52111.017
less stable11.31727.81039.18
stable9.61834.0943.67
total24.41169.3593.73
Southeastern Alpscritical1.4504.9266.323
less stable6.32339.7846.07
stable7.72159.0666.86
total15.514103.63119.03
Southern Alpscritical0.7716.3237.022
less stable5.32557.0662.36
stable6.42343.6850.07
total12.416106.94119.33
Switzerlandcritical7.32248.5855.88
less stable42.29400.72442.92
stable41.29524.02565.32
total90.86973.211063.91

calculated by unit of reference: economic region

© WSL, Swiss National Forest Inventory, 03.11.2014 #163326/149706

NFI4b

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 NFI1/NFI2/NFI3/NFI4 combined
grid:
state 2009/13
biogeographical region
JuraPlateauNorthern AlpsWestern Central-AlpsEastern Central-AlpsSouthern AlpsSwitzerland
avalanches SilvaProtect, modelled and assigneddegree of cover (aerial photo, 5 classes) %± %± %± %± %± %± %±
inside perimeter0-20%....3.81.9......1.60.8
21-40%7.87.5..5.82.37.53.210.85.12.72.76.61.5
41-60%....12.53.232.85.740.58.119.16.522.02.6
61-80%38.413.5..27.94.429.85.629.77.543.18.131.42.9
over 80%53.813.8..50.04.929.85.618.96.435.17.838.43.0
total100.0...100.0.100.0.100.0.100.0.100.0.
outside perimeter0-20%1.60.51.10.41.20.41.10.80.40.41.00.61.10.2
21-40%1.20.51.80.54.40.76.11.810.52.01.60.73.40.3
41-60%8.21.24.90.816.41.328.43.431.63.010.11.713.20.6
61-80%24.81.920.81.532.41.739.43.640.23.226.42.528.30.9
over 80%64.22.171.41.745.71.825.03.217.22.560.92.853.90.9
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
total0-20%1.50.51.10.41.50.40.80.60.40.40.90.51.20.2
21-40%1.30.51.80.54.50.76.51.610.61.91.70.73.70.3
41-60%8.01.24.90.815.91.229.62.932.82.811.11.713.90.6
61-80%25.11.920.81.531.81.636.83.138.72.928.22.428.60.8
over 80%64.02.171.41.746.21.726.32.817.52.358.12.752.60.9
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, 03.11.2014 #163327/149707

NFI4b

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 NFI1/NFI2/NFI3/NFI4 combined
grid:
state 2009/13
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%....1.450......1.450
21-40%0.4100..2.1411.7451.4500.41006.024
41-60%....4.6287.5215.3252.53820.013
61-80%1.845..10.3186.8223.9305.72528.511
over 80%2.538..18.4146.8222.5374.62734.910
total4.727..36.9922.91113.11613.21690.86
outside perimeter0-20%2.9352.8353.2330.7710.41001.15811.018
21-40%2.2414.62812.1173.8308.8191.84533.310
41-60%15.11512.41745.5817.51326.51011.118128.05
61-80%45.8852.7789.9624.31133.6928.810275.13
over 80%118.54181.43127.0415.41414.41566.56523.22
total184.52253.91277.7261.6583.64109.24970.61
total0-20%2.9352.8354.6280.7710.41001.15812.417
21-40%2.5384.62814.3165.52510.2182.14139.39
41-60%15.11512.41750.1825.01031.8913.616148.05
61-80%47.6852.77100.2531.1937.5834.59303.63
over 80%121.04181.43145.4422.21116.91471.15558.12
total189.11253.91314.6284.6496.73122.431061.31

calculated by unit of reference: biogeographical region

© WSL, Swiss National Forest Inventory, 03.11.2014 #163328/149708

NFI4b

forest area: avalanches SilvaProtect, modelled and assigned · degree of cover (aerial photo, 5 classes) · canton
unit: %
unit of evaluation: accessible forest excluding shrub forest NFI1/NFI2/NFI3/NFI4 combined
grid:
state 2009/13
avalanches SilvaProtect, modelled and assigned
inside perimeteroutside perimetertotal
cantondegree of cover (aerial photo, 5 classes) %± %± %±
AG0-20%..1.71.21.71.2
21-40%..4.11.84.11.8
41-60%..5.02.05.02.0
61-80%..14.03.214.03.2
over 80%..75.23.975.23.9
total..100.0.100.0.
AI0-20%......
21-40%......
41-60%..8.38.26.76.6
61-80%66.727.916.711.126.711.8
over 80%33.328.075.012.966.712.5
total100.0.100.0.100.0.
AR0-20%......
21-40%......
41-60%..4.24.24.04.0
61-80%100.0.29.29.532.09.5
over 80%..66.79.864.09.8
total100.0.100.0.100.0.
BE0-20%7.34.11.40.61.90.6
21-40%12.35.22.80.83.60.9
41-60%14.85.610.41.510.81.4
61-80%26.76.931.22.230.82.1
over 80%38.97.654.32.452.92.3
total100.0.100.0.100.0.
BL/BS0-20%..2.12.12.12.1
21-40%......
41-60%..4.33.04.33.0
61-80%..8.54.18.54.1
over 80%..85.05.385.05.3
total..100.0.100.0.
FR0-20%......
21-40%..3.71.83.61.8
41-60%33.327.314.03.414.63.4
61-80%66.727.328.14.429.14.4
over 80%..54.24.852.74.8
total100.0.100.0.100.0.
GE0-20%......
21-40%......
41-60%......
61-80%......
over 80%..100.0.100.0.
total..100.0.100.0.
GL0-20%..3.23.22.42.4
21-40%10.09.66.54.57.34.1
41-60%10.09.66.54.57.34.1
61-80%20.012.816.16.717.15.9
over 80%60.015.667.78.565.97.5
total100.0.100.0.100.0.
GR0-20%..0.60.40.50.3
21-40%5.43.07.71.47.41.3
41-60%32.26.330.42.530.72.3
61-80%35.76.439.02.638.52.4
over 80%26.85.922.42.223.02.1
total100.0.100.0.100.0.
JU0-20%..1.21.21.21.2
21-40%......
41-60%..8.23.08.12.9
61-80%50.035.516.54.017.34.1
over 80%50.035.574.14.873.54.8
total100.0.100.0.100.0.
LU0-20%..2.41.42.41.4
21-40%..0.80.80.80.8
41-60%50.035.514.63.215.23.2
61-80%..35.84.335.24.3
over 80%50.035.546.44.546.44.5
total100.0.100.0.100.0.
NE0-20%..1.51.51.41.4
21-40%......
41-60%..9.73.39.43.2
61-80%33.327.434.25.334.25.2
over 80%66.727.354.65.555.05.4
total100.0.100.0.100.0.
NW0-20%......
21-40%......
41-60%..7.17.05.95.8
61-80%33.327.821.411.223.510.5
over 80%66.727.771.412.370.611.3
total100.0.100.0.100.0.
OW0-20%..2.01.91.81.8
21-40%..2.22.22.02.0
41-60%..17.45.615.75.1
61-80%40.022.141.47.341.27.0
over 80%60.022.137.07.239.36.9
total100.0.100.0.100.0.
SG0-20%..0.80.80.70.7
21-40%..5.52.05.11.9
41-60%..11.82.910.92.7
61-80%40.015.522.13.723.43.6
over 80%60.015.559.94.459.94.2
total100.0.100.0.100.0.
SH0-20%......
21-40%......
41-60%..2.82.82.82.8
61-80%..25.07.325.07.3
over 80%..72.27.672.27.6
total..100.0.100.0.
SO0-20%..1.21.21.21.2
21-40%..1.21.21.21.2
41-60%..2.41.72.41.7
61-80%..15.74.015.74.0
over 80%..79.54.579.54.5
total..100.0.100.0.
SZ0-20%......
21-40%..6.23.05.62.8
41-60%..20.05.018.34.6
61-80%16.715.324.65.424.05.1
over 80%83.315.249.26.252.16.0
total100.0.100.0.100.0.
TG0-20%..2.82.02.82.0
21-40%..1.41.41.41.4
41-60%..2.82.02.82.0
61-80%..21.34.921.34.9
over 80%..71.55.471.55.4
total..100.0.100.0.
TI0-20%..0.80.60.70.5
21-40%4.34.32.00.92.20.9
41-60%21.98.66.11.57.51.6
61-80%39.110.224.12.725.42.7
over 80%34.79.966.93.064.22.9
total100.0.100.0.100.0.
UR0-20%11.110.5..2.32.3
21-40%11.110.52.92.94.63.2
41-60%22.213.918.26.719.16.1
61-80%..34.98.227.66.8
over 80%55.616.744.08.646.47.7
total100.0.100.0.100.0.
VD0-20%..1.70.81.60.8
21-40%10.09.52.91.13.21.1
41-60%10.09.511.42.111.42.0
61-80%30.014.528.42.928.42.9
over 80%50.015.855.63.255.33.2
total100.0.100.0.100.0.
VS0-20%..1.00.70.70.5
21-40%7.13.16.01.76.31.5
41-60%31.05.526.33.127.52.7
61-80%29.65.438.63.436.22.9
over 80%32.45.628.23.229.32.8
total100.0.100.0.100.0.
ZG0-20%..7.77.77.77.7
21-40%......
41-60%..15.410.415.410.4
61-80%..15.410.415.410.4
over 80%..61.514.061.514.0
total..100.0.100.0.
ZH0-20%......
21-40%..2.81.42.81.4
41-60%..3.51.53.51.5
61-80%..22.43.522.43.5
over 80%..71.33.871.33.8
total..100.0.100.0.
Switzerland0-20%1.50.71.10.21.20.2
21-40%6.61.63.40.33.70.3
41-60%21.92.613.10.613.90.6
61-80%31.42.928.00.828.30.8
over 80%38.53.054.30.952.90.9
total100.0.100.0.100.0.

calculated by unit of reference: canton

© WSL, Swiss National Forest Inventory, 03.11.2014 #163329/149709

NFI4b

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 NFI1/NFI2/NFI3/NFI4 combined
grid:
state 2009/13
avalanches SilvaProtect, modelled and assigned
inside perimeteroutside perimetertotal
cantondegree of cover (aerial photo, 5 classes)1000 ha± %1000 ha± %1000 ha± %
AG0-20%..0.8700.870
21-40%..2.0442.044
41-60%..2.4402.440
61-80%..6.8236.823
over 80%..36.6636.66
total..48.7248.72
AI0-20%......
21-40%......
41-60%..0.31000.3100
61-80%0.6690.6691.345
over 80%0.31002.9243.222
total1.0543.9174.811
AR0-20%......
21-40%......
41-60%..0.31000.3100
61-80%0.31002.2332.630
over 80%..5.1165.116
total0.31007.768.05
BE0-20%1.0582.1413.133
21-40%1.7454.1295.924
41-60%2.14115.41417.513
61-80%3.83046.2849.97
over 80%5.52580.4585.95
total14.115148.22162.32
BL/BS0-20%..0.41000.4100
21-40%......
41-60%..0.8700.870
61-80%..1.6491.649
over 80%..16.2916.29
total..19.1619.16
FR0-20%......
21-40%..1.5501.550
41-60%0.41005.6246.023
61-80%0.77011.21612.015
over 80%..21.71021.710
total1.15740.0441.13
GE0-20%......
21-40%......
41-60%......
61-80%......
over 80%..2.2342.234
total..2.2342.234
GL0-20%..0.41000.4100
21-40%0.41000.8701.257
41-60%0.41000.8701.257
61-80%0.8701.9432.736
over 80%2.3398.11710.414
total3.92911.91215.88
GR0-20%..0.7710.771
21-40%1.0589.41910.518
41-60%6.32337.3943.68
61-80%7.02247.8754.87
over 80%5.22527.51032.79
total19.613122.83142.33
JU0-20%..0.41000.4100
21-40%......
41-60%..2.7372.737
61-80%0.41005.5255.824
over 80%0.410024.5724.97
total0.87033.1333.93
LU0-20%..0.9570.957
21-40%..0.31000.3100
41-60%0.31005.6226.021
61-80%..13.91313.913
over 80%0.310017.91018.310
total0.67038.7339.33
NE0-20%..0.41000.4100
21-40%......
41-60%..2.6342.634
61-80%0.31009.0169.416
over 80%0.67014.41115.110
total1.05726.4527.44
NW0-20%......
21-40%......
41-60%..0.41000.4100
61-80%0.41001.2551.546
over 80%0.8693.8244.620
total1.2555.4176.513
OW0-20%..0.31000.3100
21-40%..0.41000.4100
41-60%..3.0333.033
61-80%0.7707.1197.817
over 80%1.1576.4207.518
total1.94317.2619.04
SG0-20%..0.41000.4100
21-40%..2.5372.537
41-60%..5.4255.425
61-80%1.45010.11711.616
over 80%2.24027.5929.78
total3.63145.9549.54
SH0-20%......
21-40%......
41-60%..0.41000.4100
61-80%..3.2293.229
over 80%..9.3119.311
total..12.8312.83
SO0-20%..0.41000.4100
21-40%..0.41000.4100
41-60%..0.8700.870
61-80%..4.9264.926
over 80%..25.0625.06
total..31.4431.44
SZ0-20%......
21-40%..1.4491.449
41-60%..4.7264.726
61-80%0.41005.8236.222
over 80%1.84411.61413.412
total2.24023.5625.75
TG0-20%..0.6700.670
21-40%..0.31000.3100
41-60%..0.6700.670
61-80%..4.5234.523
over 80%..15.0915.09
total..21.0421.04
TI0-20%..0.7710.771
21-40%0.41001.8442.141
41-60%1.8455.4257.222
61-80%3.23321.11224.311
over 80%2.93558.7661.56
total8.32087.6495.94
UR0-20%0.3100..0.3100
21-40%0.31000.31000.770
41-60%0.7702.1402.735
61-80%..4.0274.027
over 80%1.7435.0246.620
total3.03111.41414.311
VD0-20%..1.5501.550
21-40%0.41002.6383.035
41-60%0.410010.21810.618
61-80%1.15825.41126.511
over 80%1.94449.7751.66
total3.83189.4393.23
VS0-20%..0.7710.771
21-40%1.7454.1295.924
41-60%7.52118.21325.810
61-80%7.22126.81034.09
over 80%7.92019.51227.410
total24.41169.3593.73
ZG0-20%..0.41000.4100
21-40%......
41-60%..0.9680.968
61-80%..0.9680.968
over 80%..3.4253.425
total..5.695.69
ZH0-20%......
21-40%..1.4491.449
41-60%..1.8441.844
61-80%..11.31611.316
over 80%..36.0636.06
total..50.4250.42
Switzerland0-20%1.45011.11812.517
21-40%6.02433.41039.49
41-60%19.813127.75147.55
61-80%28.411273.03301.43
over 80%34.810528.42563.22
total90.46973.611064.01

calculated by unit of reference: canton

© WSL, Swiss National Forest Inventory, 03.11.2014 #163330/149710

NFI4b

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 NFI1/NFI2/NFI3/NFI4 combined
grid:
state 2009/13
production region
JuraPlateauPre-AlpsAlpsSouthern AlpsSwitzerland
avalanches SilvaProtect, modelled and assigneddegree of cover (aerial photo, 5 classes) %± %± %± %± %± %±
inside perimeter0-20%......2.31.1..1.50.8
21-40%7.67.3..5.73.97.52.02.92.86.61.5
41-60%....20.06.824.63.320.26.822.02.6
61-80%38.513.5..31.47.928.63.442.88.431.42.9
over 80%53.913.8..42.98.437.13.734.28.038.43.0
total100.0...100.0.100.0.100.0.100.0.
outside perimeter0-20%1.50.51.20.41.10.50.80.31.00.61.10.2
21-40%1.10.52.00.63.40.87.11.01.70.73.40.3
41-60%6.91.15.60.913.31.526.21.69.01.613.10.6
61-80%23.11.821.61.632.82.035.41.826.82.628.30.9
over 80%67.32.169.61.849.32.230.51.761.62.854.00.9
total100.0.100.0.100.0.100.0.100.0.100.0.
total0-20%1.50.51.20.41.10.41.10.30.90.51.20.2
21-40%1.30.52.00.63.50.87.20.91.80.73.70.3
41-60%6.71.15.60.913.71.425.91.510.11.613.90.6
61-80%23.51.821.61.632.72.034.11.628.52.528.60.8
over 80%67.02.069.61.848.92.131.81.558.72.752.70.9
total100.0.100.0.100.0.100.0.100.0.100.0.

calculated by unit of reference: production region

© WSL, Swiss National Forest Inventory, 03.11.2014 #163331/149711

NFI4b

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 NFI1/NFI2/NFI3/NFI4 combined
grid:
state 2009/13
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%......1.450..1.450
21-40%0.4100..0.7714.5280.41005.924
41-60%....2.53814.9152.53819.913
61-80%1.845..4.03017.3145.32528.411
over 80%2.638..5.42622.5124.32934.710
total4.727..12.61660.5712.41690.36
outside perimeter0-20%2.9352.8352.2412.1411.15811.018
21-40%2.2414.6276.52318.1141.84533.110
41-60%13.11612.61625.61166.579.619127.55
61-80%44.2848.8863.1789.9628.710274.73
over 80%128.53157.4394.8577.5665.86524.12
total190.92226.31192.12254.22106.94970.41
total0-20%2.9352.8352.2413.5321.15812.417
21-40%2.5384.6277.22222.6122.14139.09
41-60%13.11612.61628.11181.4612.117147.45
61-80%46.0848.8867.06107.2534.09303.13
over 80%131.13157.43100.25100.0570.05558.72
total195.71226.31204.72314.62119.331060.61

calculated by unit of reference: production region

© WSL, Swiss National Forest Inventory, 03.11.2014 #163332/149712

NFI4b

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 NFI1/NFI2/NFI3/NFI4 combined
grid:
state 2009/13
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern AlpsSwitzerland
avalanches SilvaProtect, modelled and assigneddegree of cover (aerial photo, 5 classes) %± %± %± %± %± %± %±
inside perimeter0-20%..5.43.02.62.5......1.60.8
21-40%7.87.58.93.85.13.57.13.16.83.82.92.86.61.6
41-60%..16.14.97.74.331.05.536.47.320.26.822.02.6
61-80%38.413.528.66.025.67.029.65.431.87.042.88.431.42.9
over 80%53.813.841.16.659.07.932.45.625.06.534.28.038.43.0
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeter0-20%1.40.31.30.51.00.61.00.70.30.31.00.61.10.2
21-40%1.60.43.60.94.91.36.01.79.21.71.70.73.40.3
41-60%6.20.716.11.713.22.026.33.132.22.79.01.613.20.6
61-80%22.31.235.82.224.42.538.63.439.02.826.82.628.30.9
over 80%68.51.443.22.356.52.928.23.219.32.361.62.853.90.9
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
total0-20%1.40.31.70.61.20.60.70.50.30.30.90.51.20.2
21-40%1.70.44.20.94.91.26.31.58.81.51.80.73.70.3
41-60%6.10.716.11.612.61.827.52.732.72.610.11.613.90.6
61-80%22.51.235.02.124.62.336.22.938.12.628.52.528.60.8
over 80%68.41.443.02.256.82.729.32.820.02.258.72.752.60.9
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.

calculated by unit of reference: protection forest region

© WSL, Swiss National Forest Inventory, 03.11.2014 #163333/149713

NFI4b

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 NFI1/NFI2/NFI3/NFI4 combined
grid:
state 2009/13
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%..1.1580.3100......1.450
21-40%0.41001.8450.7711.7451.1580.41006.024
41-60%..3.2331.0587.5215.6252.53820.013
61-80%1.8455.8253.4317.2214.9265.32528.411
over 80%2.5388.3207.9207.9203.9304.32934.710
total4.72820.21313.41524.41115.51412.41690.56
outside perimeter0-20%5.7252.2411.1580.7710.41001.15811.018
21-40%6.8236.1245.0274.1299.5191.84533.310
41-60%25.81127.41113.61518.21333.499.619128.05
61-80%93.0660.9725.21126.81040.4828.710275.03
over 80%286.1273.6658.3619.51220.01265.86523.32
total417.41170.22103.2369.35103.63106.94970.61
total0-20%5.7253.2331.4500.7710.41001.15812.517
21-40%7.2227.9215.7255.92410.5182.14139.39
41-60%25.81130.71014.71525.71039.0812.117147.95
61-80%94.8666.7628.71034.0945.4734.09303.43
over 80%288.6281.9566.2527.41023.81170.05558.02
total422.11190.42116.7393.73119.03119.331061.21

calculated by unit of reference: protection forest region

© WSL, Swiss National Forest Inventory, 03.11.2014 #163334/149714

NFI4b

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 NFI1/NFI2/NFI3/NFI4 combined
grid:
state 2009/13
avalanches SilvaProtect, modelled and assigned
inside perimeteroutside perimetertotal
economic regiondegree of cover (aerial photo, 5 classes) %± %± %±
Western Jura0-20%..1.20.61.20.5
21-40%8.07.61.30.61.50.6
41-60%..7.71.37.41.3
61-80%38.313.525.82.226.22.2
over 80%53.713.864.12.463.72.4
total100.0.100.0.100.0.
Eastern Jura0-20%..2.51.42.51.4
21-40%..0.80.80.80.8
41-60%..4.21.84.21.8
61-80%..14.33.214.33.2
over 80%..78.13.878.13.8
total..100.0.100.0.
Western Plateau0-20%..2.61.52.61.5
21-40%..1.71.21.71.2
41-60%..9.62.89.62.8
61-80%..25.24.125.24.1
over 80%..60.84.660.84.6
total..100.0.100.0.
Central Plateau0-20%..1.40.81.40.8
21-40%..0.90.60.90.6
41-60%..5.91.65.91.6
61-80%..23.12.823.12.8
over 80%..68.83.168.83.1
total..100.0.100.0.
Eastern Plateau0-20%..0.60.50.60.5
21-40%..2.91.02.91.0
41-60%..3.91.13.91.1
61-80%..19.22.219.22.2
over 80%..73.42.573.42.5
total..100.0.100.0.
Western Pre-Alps0-20%..1.01.00.90.9
21-40%25.115.45.82.37.22.5
41-60%37.117.119.43.920.73.9
61-80%25.115.430.14.529.84.4
over 80%12.611.843.74.941.44.7
total100.0.100.0.100.0.
Central Pre-Alps0-20%..1.20.71.10.7
21-40%..2.51.02.30.9
41-60%21.19.413.12.213.62.1
61-80%26.310.140.43.139.43.0
over 80%52.611.542.93.243.63.1
total100.0.100.0.100.0.
Eastern Pre-Alps0-20%..1.10.81.00.7
21-40%..3.21.33.11.3
41-60%..10.32.29.82.1
61-80%50.017.724.33.225.43.1
over 80%50.017.761.13.660.63.5
total100.0.100.0.100.0.
Northwestern Alps0-20%10.35.71.61.13.31.4
21-40%10.35.74.01.85.21.8
41-60%6.94.719.43.617.03.0
61-80%31.08.631.44.231.43.8
over 80%41.49.243.64.543.24.0
total100.0.100.0.100.0.
Central Alps0-20%7.16.9..1.61.6
21-40%7.16.94.02.84.72.6
41-60%14.39.422.25.920.55.1
61-80%7.16.927.96.423.35.3
over 80%64.312.845.97.149.96.3
total100.0.100.0.100.0.
Northeastern Alps0-20%..1.61.61.21.2
21-40%5.95.79.53.78.83.2
41-60%5.95.714.34.412.53.7
61-80%29.411.122.25.323.84.8
over 80%58.812.052.36.353.75.6
total100.0.100.0.100.0.
Southwestern Alps0-20%..1.00.70.70.5
21-40%7.13.16.01.76.31.5
41-60%31.05.526.33.127.52.7
61-80%29.65.438.63.436.22.9
over 80%32.45.628.23.229.32.8
total100.0.100.0.100.0.
Southeastern Alps0-20%..0.30.30.30.3
21-40%6.83.89.21.78.81.5
41-60%36.47.332.22.732.72.6
61-80%31.87.039.02.838.12.6
over 80%25.06.519.32.320.02.2
total100.0.100.0.100.0.
Southern Alps0-20%..1.00.60.90.5
21-40%2.92.81.70.71.80.7
41-60%20.26.89.01.610.11.6
61-80%42.88.426.82.628.52.5
over 80%34.28.061.62.858.72.7
total100.0.100.0.100.0.
Switzerland0-20%1.60.81.20.21.20.2
21-40%6.61.63.40.33.70.3
41-60%22.02.613.20.613.90.6
61-80%31.42.928.30.928.60.8
over 80%38.43.053.90.952.60.9
total100.0.100.0.100.0.

calculated by unit of reference: economic region

© WSL, Swiss National Forest Inventory, 03.11.2014 #163335/149715

NFI4b

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 NFI1/NFI2/NFI3/NFI4 combined
grid:
state 2009/13
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%..1.8451.845
21-40%0.41001.8452.241
41-60%..11.11711.117
61-80%1.84537.2938.98
over 80%2.53892.4494.94
total4.627144.22148.92
Eastern Jura0-20%..1.2571.257
21-40%..0.41000.4100
41-60%..2.0442.044
61-80%..6.7236.723
over 80%..36.7636.76
total..47.0347.03
Western Plateau0-20%..1.2571.257
21-40%..0.8700.870
41-60%..4.5294.529
61-80%..11.91711.917
over 80%..28.7828.78
total..47.2447.24
Central Plateau0-20%..0.9570.957
21-40%..0.6710.671
41-60%..4.0274.027
61-80%..15.91315.913
over 80%..47.2547.25
total..68.7268.72
Eastern Plateau0-20%..0.7710.771
21-40%..3.2333.233
41-60%..4.3284.328
61-80%..21.11221.112
over 80%..80.8480.84
total..110.12110.12
Western Pre-Alps0-20%..0.41000.4100
21-40%0.7702.2402.935
41-60%1.1587.4218.519
61-80%0.77011.51612.215
over 80%0.410016.61217.012
total2.93538.1541.14
Central Pre-Alps0-20%..1.1581.158
21-40%..2.2412.241
41-60%1.45011.51712.916
61-80%1.84435.5837.38
over 80%3.63137.6841.27
total6.82287.8394.72
Eastern Pre-Alps0-20%..0.7710.771
21-40%..2.1412.141
41-60%..6.8226.822
61-80%1.45016.11317.513
over 80%1.45040.4741.86
total2.93566.1368.93
Northwestern Alps0-20%1.1570.7711.844
21-40%1.1571.8442.935
41-60%0.7718.6199.318
61-80%3.23313.91417.113
over 80%4.32819.31223.610
total10.41744.3654.74
Central Alps0-20%0.3100..0.3100
21-40%0.31000.7701.057
41-60%0.7703.8294.527
61-80%0.31004.8255.224
over 80%3.1327.91911.015
total4.82517.31122.18
Northeastern Alps0-20%..0.41000.4100
21-40%0.41002.2402.537
41-60%0.41003.2323.631
61-80%1.8445.0256.821
over 80%3.63011.81515.412
total6.12222.6928.76
Southwestern Alps0-20%..0.7710.771
21-40%1.7454.1295.924
41-60%7.52118.21325.710
61-80%7.22126.81034.09
over 80%7.92019.51227.410
total24.41169.3593.73
Southeastern Alps0-20%..0.41000.4100
21-40%1.1589.51910.518
41-60%5.62533.4939.08
61-80%4.92640.4845.47
over 80%3.93020.01223.811
total15.514103.63119.03
Southern Alps0-20%..1.1581.158
21-40%0.41001.8452.141
41-60%2.5389.61912.117
61-80%5.32528.71034.09
over 80%4.32965.8670.05
total12.416106.94119.33
Switzerland0-20%1.45011.21812.617
21-40%6.02433.41039.49
41-60%20.013128.45148.35
61-80%28.511275.43303.93
over 80%34.810524.82559.62
total90.86973.211063.91

calculated by unit of reference: economic region

© WSL, Swiss National Forest Inventory, 03.11.2014 #163336/149716

NFI4b

forest area: avalanches SilvaProtect, modelled and assigned · concept of transportation system · biogeographical region
unit: %
unit of evaluation: accessible forest excluding shrub forest NFI1/NFI2/NFI3/NFI4 combined
grid:
state 2009/13
biogeographical region
JuraPlateauNorthern AlpsWestern Central-AlpsEastern Central-AlpsSouthern AlpsSwitzerland
avalanches SilvaProtect, modelled and assignedconcept of transportation system %± %± %± %± %± %± %±
inside perimeterroad and skidding track23.011.7..6.82.56.02.924.37.12.72.79.31.8
road and skidding road30.712.8..4.82.1......3.51.2
road and cable line30.712.8..61.54.853.76.137.88.040.68.151.53.1
road and flight path7.87.5..18.33.834.45.837.88.051.38.229.42.8
no access intended7.77.4..8.72.86.02.9..5.43.76.21.5
total100.0...100.0.100.0.100.0.100.0.100.0.
outside perimeterroad and skidding track51.42.269.11.720.91.522.23.122.02.74.31.237.60.8
road and skidding road37.72.118.91.511.41.17.82.06.31.69.71.717.50.7
road and cable line5.31.03.90.742.21.829.53.450.73.330.62.623.80.8
road and flight path0.40.30.10.17.91.038.33.620.52.642.72.811.40.6
no access intended5.31.07.91.017.61.42.21.10.40.412.71.99.70.6
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totalroad and skidding track50.72.269.11.719.21.317.82.422.32.54.11.135.20.8
road and skidding road37.52.118.91.510.61.05.71.55.51.48.71.516.30.7
road and cable line5.91.03.90.744.51.736.03.149.03.031.72.526.20.7
road and flight path0.60.30.10.19.11.037.33.122.92.543.62.712.90.6
no access intended5.31.07.91.016.61.23.21.10.40.411.91.89.40.5
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, 03.11.2014 #163337/149717

NFI4b

forest area: avalanches SilvaProtect, modelled and assigned · concept of transportation system · biogeographical region
unit: 1000 ha
unit of evaluation: accessible forest excluding shrub forest NFI1/NFI2/NFI3/NFI4 combined
grid:
state 2009/13
biogeographical region
JuraPlateauNorthern AlpsWestern Central-AlpsEastern Central-AlpsSouthern AlpsSwitzerland
avalanches SilvaProtect, modelled and assignedconcept of transportation system1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %
inside perimeterroad and skidding track1.158..2.5381.4503.2330.41008.520
road and skidding road1.450..1.845......3.233
road and cable line1.450..22.71212.3164.9265.42546.78
road and flight path0.4100..6.7237.9204.9266.82326.711
no access intended0.4100..3.2331.450..0.7715.625
total4.727..36.9922.91113.11613.21690.86
outside perimeterroad and skidding track94.85175.4357.9713.71518.4134.627364.82
road and skidding road69.5648.1831.6104.8265.32510.618169.94
road and cable line9.7199.919117.2518.21342.4833.49230.93
road and flight path0.7710.410022.01223.61117.21346.68110.55
no access intended9.71920.21348.981.4500.410013.91594.46
total184.52253.91277.7261.6583.64109.24970.61
totalroad and skidding track95.85175.4360.4715.11421.6125.026373.32
road and skidding road71.0648.1833.4104.8265.32510.618173.14
road and cable line11.2179.919139.9430.5947.4738.88277.63
road and flight path1.1580.410028.71131.5922.11253.47137.25
no access intended10.11820.21352.182.7350.410014.615100.16
total189.11253.91314.6284.6496.73122.431061.31

calculated by unit of reference: biogeographical region

© WSL, Swiss National Forest Inventory, 03.11.2014 #163338/149718

NFI4b

forest area: avalanches SilvaProtect, modelled and assigned · concept of transportation system · canton
unit: %
unit of evaluation: accessible forest excluding shrub forest NFI1/NFI2/NFI3/NFI4 combined
grid:
state 2009/13
avalanches SilvaProtect, modelled and assigned
inside perimeteroutside perimetertotal
cantonconcept of transportation system %± %± %±
AGroad and skidding track..61.24.461.24.4
road and skidding road..32.24.332.24.3
road and cable line......
road and flight path......
no access intended..6.62.36.62.3
total..100.0.100.0.
AIroad and skidding track..75.012.660.012.9
road and skidding road33.328.08.38.213.39.0
road and cable line33.328.016.711.120.010.6
road and flight path33.328.0..6.76.6
no access intended......
total100.0.100.0.100.0.
ARroad and skidding track..66.79.764.09.6
road and skidding road..16.77.716.07.5
road and cable line100.0.16.77.820.08.2
road and flight path......
no access intended......
total100.0.100.0.100.0.
BEroad and skidding track7.54.140.92.438.02.2
road and skidding road7.34.122.62.021.31.9
road and cable line68.17.327.02.130.62.1
road and flight path12.35.21.20.52.10.7
no access intended4.93.48.31.38.01.2
total100.0.100.0.100.0.
BL/BSroad and skidding track..57.77.257.77.2
road and skidding road..33.87.033.87.0
road and cable line..6.43.66.43.6
road and flight path......
no access intended..2.12.12.12.1
total..100.0.100.0.
FRroad and skidding track..45.84.844.64.7
road and skidding road..13.03.312.73.2
road and cable line66.727.325.24.226.34.2
road and flight path......
no access intended33.327.315.93.616.43.5
total100.0.100.0.100.0.
GEroad and skidding track..100.0.100.0.
road and skidding road......
road and cable line......
road and flight path......
no access intended......
total..100.0.100.0.
GLroad and skidding track......
road and skidding road......
road and cable line50.015.974.27.968.37.3
road and flight path30.014.66.54.512.25.2
no access intended20.012.819.47.219.56.2
total100.0.100.0.100.0.
GRroad and skidding track21.45.522.82.222.62.1
road and skidding road..5.41.24.71.0
road and cable line46.56.750.02.749.62.5
road and flight path30.36.119.52.121.02.0
no access intended1.81.82.30.82.20.7
total100.0.100.0.100.0.
JUroad and skidding track..44.85.443.75.3
road and skidding road50.035.549.45.549.45.4
road and cable line..1.21.21.21.2
road and flight path......
no access intended50.035.54.72.35.82.5
total100.0.100.0.100.0.
LUroad and skidding track..25.13.924.73.9
road and skidding road..10.52.810.42.7
road and cable line50.035.58.92.69.62.6
road and flight path......
no access intended50.035.555.44.555.34.5
total100.0.100.0.100.0.
NEroad and skidding track33.327.452.45.551.85.5
road and skidding road66.727.341.55.542.45.4
road and cable line......
road and flight path......
no access intended..6.12.65.92.6
total100.0.100.0.100.0.
NWroad and skidding track..7.17.05.95.8
road and skidding road..7.17.05.95.8
road and cable line33.327.842.913.541.212.2
road and flight path33.327.87.17.011.88.0
no access intended33.327.835.713.135.311.8
total100.0.100.0.100.0.
OWroad and skidding track..2.22.22.02.0
road and skidding road..10.94.69.84.2
road and cable line40.022.152.17.450.97.1
road and flight path60.022.115.25.319.65.6
no access intended..19.65.917.75.4
total100.0.100.0.100.0.
SGroad and skidding track30.014.540.94.440.14.2
road and skidding road20.012.718.93.519.03.4
road and cable line20.012.727.54.027.03.8
road and flight path20.012.712.63.013.12.9
no access intended10.09.5..0.70.7
total100.0.100.0.100.0.
SHroad and skidding track..83.36.083.36.0
road and skidding road..13.95.813.95.8
road and cable line..2.82.82.82.8
road and flight path......
no access intended......
total..100.0.100.0.
SOroad and skidding track..55.45.555.45.5
road and skidding road..31.35.131.35.1
road and cable line..9.63.39.63.3
road and flight path......
no access intended..3.62.13.62.1
total..100.0.100.0.
SZroad and skidding track..4.62.64.22.4
road and skidding road..15.44.514.14.2
road and cable line83.315.233.85.938.05.8
road and flight path..4.62.64.22.4
no access intended16.715.341.56.139.45.8
total100.0.100.0.100.0.
TGroad and skidding track..85.84.285.84.2
road and skidding road..12.84.012.84.0
road and cable line..1.41.41.41.4
road and flight path......
no access intended......
total..100.0.100.0.
TIroad and skidding track..2.91.12.61.0
road and skidding road..11.02.010.01.8
road and cable line26.09.224.92.825.02.6
road and flight path69.69.648.23.250.03.1
no access intended4.34.313.12.212.32.0
total100.0.100.0.100.0.
URroad and skidding track..8.74.86.93.9
road and skidding road..9.55.27.64.2
road and cable line66.715.844.08.648.77.7
road and flight path33.315.820.36.923.06.4
no access intended..17.46.513.85.3
total100.0.100.0.100.0.
VDroad and skidding track..48.73.346.73.2
road and skidding road..21.72.720.82.6
road and cable line80.012.612.32.115.12.3
road and flight path20.012.76.31.66.91.6
no access intended..11.12.010.62.0
total100.0.100.0.100.0.
VSroad and skidding track7.03.023.33.019.02.4
road and skidding road..8.42.06.21.5
road and cable line54.95.931.23.337.42.9
road and flight path32.55.635.13.434.42.9
no access intended5.62.72.01.02.91.0
total100.0.100.0.100.0.
ZGroad and skidding track..46.214.346.214.3
road and skidding road..15.410.415.410.4
road and cable line..38.513.938.513.9
road and flight path......
no access intended......
total..100.0.100.0.
ZHroad and skidding track..74.83.674.83.6
road and skidding road..11.92.711.92.7
road and cable line..12.62.812.62.8
road and flight path......
no access intended..0.70.70.70.7
total..100.0.100.0.
Switzerlandroad and skidding track9.21.837.60.935.20.8
road and skidding road3.41.117.70.716.50.7
road and cable line51.43.123.70.826.10.8
road and flight path29.62.811.40.612.90.6
no access intended6.31.59.60.59.30.5
total100.0.100.0.100.0.

calculated by unit of reference: canton

© WSL, Swiss National Forest Inventory, 03.11.2014 #163339/149719

NFI4b

forest area: avalanches SilvaProtect, modelled and assigned · concept of transportation system · canton
unit: 1000 ha
unit of evaluation: accessible forest excluding shrub forest NFI1/NFI2/NFI3/NFI4 combined
grid:
state 2009/13
avalanches SilvaProtect, modelled and assigned
inside perimeteroutside perimetertotal
cantonconcept of transportation system1000 ha± %1000 ha± %1000 ha± %
AGroad and skidding track..29.8829.88
road and skidding road..15.71315.713
road and cable line......
road and flight path......
no access intended..3.2343.234
total..48.7248.72
AIroad and skidding track..2.9242.924
road and skidding road0.31000.31000.669
road and cable line0.31000.6691.054
road and flight path0.3100..0.3100
no access intended......
total1.0543.9174.811
ARroad and skidding track..5.1165.116
road and skidding road..1.3471.347
road and cable line0.31001.3471.641
road and flight path......
no access intended......
total0.31007.768.05
BEroad and skidding track1.05860.6661.76
road and skidding road1.05833.5934.59
road and cable line9.61840.1849.67
road and flight path1.7451.7453.431
no access intended0.77112.31613.016
total14.115148.22162.32
BL/BSroad and skidding track..11.01411.014
road and skidding road..6.4226.422
road and cable line..1.2571.257
road and flight path......
no access intended..0.41000.4100
total..19.1619.16
FRroad and skidding track..18.31118.311
road and skidding road..5.2255.225
road and cable line0.77010.11710.816
road and flight path......
no access intended0.41006.4236.722
total1.15740.0441.13
GEroad and skidding track..2.2342.234
road and skidding road......
road and cable line......
road and flight path......
no access intended......
total..2.2342.234
GLroad and skidding track......
road and skidding road......
road and cable line1.9438.91610.813
road and flight path1.2570.8701.943
no access intended0.8702.3393.133
total3.92911.91215.88
GRroad and skidding track4.22927.91032.110
road and skidding road..6.6236.623
road and cable line9.11961.4670.56
road and flight path5.92424.01129.910
no access intended0.31002.8353.133
total19.613122.83142.33
JUroad and skidding track..14.81214.812
road and skidding road0.410016.31216.711
road and cable line..0.41000.4100
road and flight path......
no access intended0.41001.6491.944
total0.87033.1333.93
LUroad and skidding track..9.7169.716
road and skidding road..4.1264.126
road and cable line0.31003.5293.828
road and flight path......
no access intended0.310021.5921.89
total0.67038.7339.33
NEroad and skidding track0.310013.81214.211
road and skidding road0.67011.01411.613
road and cable line......
road and flight path......
no access intended..1.6441.644
total1.05726.4527.44
NWroad and skidding track..0.41000.4100
road and skidding road..0.41000.4100
road and cable line0.41002.3362.732
road and flight path0.41000.41000.869
no access intended0.41001.9402.336
total1.2555.4176.513
OWroad and skidding track..0.41000.4100
road and skidding road..1.9431.943
road and cable line0.7708.9169.715
road and flight path1.1572.6363.729
no access intended..3.4313.431
total1.94317.2619.04
SGroad and skidding track1.15718.81219.911
road and skidding road0.7708.7199.418
road and cable line0.77012.61513.415
road and flight path0.7705.8246.522
no access intended0.4100..0.4100
total3.63145.9549.54
SHroad and skidding track..10.7810.78
road and skidding road..1.8421.842
road and cable line..0.41000.4100
road and flight path......
no access intended......
total..12.8312.83
SOroad and skidding track..17.41017.410
road and skidding road..9.8179.817
road and cable line..3.0343.034
road and flight path......
no access intended..1.1571.157
total..31.4431.44
SZroad and skidding track..1.1571.157
road and skidding road..3.6303.630
road and cable line1.8448.0189.816
road and flight path..1.1571.157
no access intended0.41009.81610.116
total2.24023.5625.75
TGroad and skidding track..18.0618.06
road and skidding road..2.7312.731
road and cable line..0.31000.3100
road and flight path......
no access intended......
total..21.0421.04
TIroad and skidding track..2.5372.537
road and skidding road..9.6199.619
road and cable line2.14121.81224.011
road and flight path5.72542.2848.07
no access intended0.410011.51711.817
total8.32087.6495.94
URroad and skidding track..1.0571.057
road and skidding road..1.1581.158
road and cable line2.0395.0247.019
road and flight path1.0572.3363.330
no access intended..2.0392.039
total3.03111.41414.311
VDroad and skidding track..43.5743.57
road and skidding road..19.41319.413
road and cable line3.03511.01814.115
road and flight path0.8715.6256.424
no access intended..9.9199.919
total3.83189.4393.23
VSroad and skidding track1.74416.11417.813
road and skidding road..5.8245.824
road and cable line13.41521.61235.09
road and flight path7.92024.41132.39
no access intended1.4501.4502.735
total24.41169.3593.73
ZGroad and skidding track..2.6322.632
road and skidding road..0.9680.968
road and cable line..2.1372.137
road and flight path......
no access intended......
total..5.695.69
ZHroad and skidding track..37.7537.75
road and skidding road..6.0236.023
road and cable line..6.3226.322
road and flight path......
no access intended..0.41000.4100
total..50.4250.42
Switzerlandroad and skidding track8.420366.42374.82
road and skidding road3.133172.14175.24
road and cable line46.58230.93277.43
road and flight path26.811110.95137.64
no access intended5.72593.3699.05
total90.46973.611064.01

calculated by unit of reference: canton

© WSL, Swiss National Forest Inventory, 03.11.2014 #163340/149720

NFI4b

forest area: avalanches SilvaProtect, modelled and assigned · concept of transportation system · production region
unit: %
unit of evaluation: accessible forest excluding shrub forest NFI1/NFI2/NFI3/NFI4 combined
grid:
state 2009/13
production region
JuraPlateauPre-AlpsAlpsSouthern AlpsSwitzerland
avalanches SilvaProtect, modelled and assignedconcept of transportation system %± %± %± %± %± %±
inside perimeterroad and skidding track23.111.7..8.54.79.72.22.92.89.31.8
road and skidding road30.812.8..8.64.71.10.8..3.61.2
road and cable line30.812.8..51.48.556.03.837.28.251.43.1
road and flight path7.67.3..20.06.828.03.454.38.429.42.8
no access intended7.77.4..11.45.45.11.75.73.96.21.5
total100.0...100.0.100.0.100.0.100.0.
outside perimeterroad and skidding track52.02.271.01.826.61.919.91.53.31.037.60.8
road and skidding road36.92.118.01.516.51.67.00.99.61.717.60.7
road and cable line4.60.93.70.731.52.046.61.831.12.723.60.8
road and flight path0.40.30.20.25.31.020.91.543.12.911.40.6
no access intended6.11.07.11.020.11.75.70.912.91.99.80.6
total100.0.100.0.100.0.100.0.100.0.100.0.
totalroad and skidding track51.32.271.01.825.51.817.91.33.31.035.20.8
road and skidding road36.82.118.01.516.01.55.80.88.61.516.40.7
road and cable line5.21.03.70.732.72.048.41.731.72.526.00.7
road and flight path0.60.30.20.26.21.022.21.444.22.712.90.6
no access intended6.21.07.11.019.51.75.60.812.21.89.50.5
total100.0.100.0.100.0.100.0.100.0.100.0.

calculated by unit of reference: production region

© WSL, Swiss National Forest Inventory, 03.11.2014 #163341/149721

NFI4b

forest area: avalanches SilvaProtect, modelled and assigned · concept of transportation system · production region
unit: 1000 ha
unit of evaluation: accessible forest excluding shrub forest NFI1/NFI2/NFI3/NFI4 combined
grid:
state 2009/13
production region
JuraPlateauPre-AlpsAlpsSouthern AlpsSwitzerland
avalanches SilvaProtect, modelled and assignedconcept of transportation system1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %
inside perimeterroad and skidding track1.158..1.1585.9240.41008.420
road and skidding road1.550..1.1580.771..3.233
road and cable line1.550..6.52333.9104.62746.48
road and flight path0.4100..2.53816.9146.72326.611
no access intended0.4100..1.4503.1330.7715.625
total4.727..12.61660.5712.41690.36
outside perimeterroad and skidding track99.35160.6351.2750.683.531365.22
road and skidding road70.5640.7831.71017.71410.218170.84
road and cable line8.8208.42060.57118.3533.29229.33
road and flight path0.7710.410010.11953.0846.08110.25
no access intended11.71716.21438.6914.51513.81594.86
total190.92226.31192.12254.22106.94970.41
totalroad and skidding track100.44160.6352.3756.473.930373.62
road and skidding road71.9640.7832.81018.41310.218174.04
road and cable line10.2188.42067.06152.2437.99275.83
road and flight path1.1580.410012.61670.0652.87136.85
no access intended12.01716.21440.0917.61414.515100.46
total195.71226.31204.72314.62119.331060.61

calculated by unit of reference: production region

© WSL, Swiss National Forest Inventory, 03.11.2014 #163342/149722

NFI4b

forest area: avalanches SilvaProtect, modelled and assigned · concept of transportation system · protection forest region
unit: %
unit of evaluation: accessible forest excluding shrub forest NFI1/NFI2/NFI3/NFI4 combined
grid:
state 2009/13
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern AlpsSwitzerland
avalanches SilvaProtect, modelled and assignedconcept of transportation system %± %± %± %± %± %± %±
inside perimeterroad and skidding track23.111.71.81.87.74.37.03.025.06.52.92.89.31.8
road and skidding road30.712.83.62.57.74.3......3.51.2
road and cable line30.712.867.96.251.38.054.95.943.27.537.28.251.63.1
road and flight path7.87.517.95.123.16.832.55.631.87.054.38.429.42.8
no access intended7.77.48.93.810.34.95.62.7..5.73.96.21.5
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterroad and skidding track62.51.417.61.827.32.623.33.026.12.63.31.037.70.8
road and skidding road26.51.314.21.612.71.98.42.05.81.49.61.717.50.7
road and cable line4.10.640.52.338.02.831.23.348.52.931.12.723.70.8
road and flight path0.30.15.51.19.01.735.13.419.22.343.12.911.30.6
no access intended6.70.722.21.913.01.92.01.00.30.312.91.99.80.6
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totalroad and skidding track62.01.415.91.625.02.419.02.426.02.43.31.035.20.8
road and skidding road26.51.313.11.512.21.86.21.55.01.28.61.516.30.7
road and cable line4.40.643.42.239.52.737.42.947.82.731.72.526.10.7
road and flight path0.30.26.81.110.61.734.42.920.92.244.22.712.90.6
no access intended6.70.720.81.812.71.82.91.00.30.312.21.89.50.5
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.

calculated by unit of reference: protection forest region

© WSL, Swiss National Forest Inventory, 03.11.2014 #163343/149723

NFI4b

forest area: avalanches SilvaProtect, modelled and assigned · concept of transportation system · protection forest region
unit: 1000 ha
unit of evaluation: accessible forest excluding shrub forest NFI1/NFI2/NFI3/NFI4 combined
grid:
state 2009/13
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern AlpsSwitzerland
avalanches SilvaProtect, modelled and assignedconcept of transportation system1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %
inside perimeterroad and skidding track1.1580.41001.0581.7443.9300.41008.420
road and skidding road1.4500.7711.058......3.233
road and cable line1.45013.7166.92213.4156.7224.62746.78
road and flight path0.41003.6313.1337.9204.9266.72326.611
no access intended0.41001.8451.4501.450..0.7715.625
total4.72820.21313.41524.41115.51412.41690.56
outside perimeterroad and skidding track260.8229.91028.11016.11427.1103.531365.62
road and skidding road110.5524.21213.2165.8246.02410.218169.94
road and cable line17.21468.9639.2821.61250.3733.29230.43
road and flight path1.1589.4199.31924.41119.91246.08110.05
no access intended27.91137.9913.4151.4500.410013.81594.86
total417.41170.22103.2369.35103.63106.94970.61
totalroad and skidding track261.8230.31029.21017.81330.9103.930374.02
road and skidding road112.0524.91114.2155.8246.02410.218173.04
road and cable line18.61482.6546.1735.0956.9637.99277.13
road and flight path1.45013.01612.41632.3924.81152.87136.75
no access intended28.31139.7914.8142.7350.410014.515100.46
total422.11190.42116.7393.73119.03119.331061.21

calculated by unit of reference: protection forest region

© WSL, Swiss National Forest Inventory, 03.11.2014 #163344/149724
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