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NFI4b

forest area: avalanches SilvaProtect, modelled and assigned · time of last treatment (classes of 10 years) · protection forest region
unit: 1000 ha
unit of evaluation: accessible forest excluding shrub forest NFI3/NFI4 combined
grid:
state 2009/13
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern 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 perimeterless than 10 years ago1.4507.2224.1284.8262.5381.45021.513
11-20 years ago1.1583.6312.8354.5274.2281.15817.214
21-30 years ago0.7714.3291.7443.1332.5381.45013.716
31-40 years ago1.1581.1581.0581.7442.1411.1588.121
41-50 years ago..1.8452.1411.7451.8450.7718.121
over 50 years ago0.41002.9352.4389.3194.6278.22027.711
total4.72820.91314.21525.01117.61313.81596.26
outside perimeterless than 10 years ago280.4275.4644.3819.61229.61013.116462.32
11-20 years ago79.4641.1926.11111.31723.9119.619191.44
21-30 years ago28.31119.81313.1166.52220.01312.01799.76
31-40 years ago14.71513.0169.5195.52514.41510.61867.57
41-50 years ago9.71910.8184.5278.6197.3218.82049.78
over 50 years ago12.91622.71218.11332.6928.01077.85192.14
total425.31182.82115.5384.14123.13131.931062.71
totalless than 10 years ago281.8282.6548.4724.41132.0914.515483.72
11-20 years ago80.5644.7828.81015.81428.11010.618208.64
21-30 years ago29.01124.21214.8159.61822.41213.416113.45
31-40 years ago15.71514.11610.5187.22116.51411.61775.67
41-50 years ago9.71912.6166.62210.3189.1199.51957.88
over 50 years ago13.21625.61120.61241.8832.6986.05219.83
total430.01203.82129.72109.13140.62145.721158.91

calculated by unit of reference: protection forest region

© WSL, Swiss National Forest Inventory, 03.11.2014 #164718/151100
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