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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 NFI1/NFI2/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 ago1.4507.2224.1284.5272.5381.45021.113
11-20 years ago1.1583.6312.8354.5274.2281.15817.214
21-30 years ago0.7713.6311.7442.7352.1411.15812.017
31-40 years ago1.1581.1580.7711.7441.8450.41006.723
41-50 years ago..1.8452.1411.7451.8450.7718.121
over 50 years ago0.41002.9352.1419.3193.2337.82125.511
total4.72820.21313.41524.41115.51412.41690.56
outside perimeterless than 10 years ago276.8272.8641.5815.41425.71111.717443.92
11-20 years ago77.3639.3924.71111.01721.1128.520181.84
21-30 years ago26.81117.71410.7175.52515.4147.12283.26
31-40 years ago14.31612.3178.4202.43810.9175.72554.08
41-50 years ago9.3199.7194.2296.2236.0248.12043.59
over 50 years ago12.91618.41313.81528.81024.61165.86164.34
total417.41170.22103.2369.35103.63106.94970.61
totalless than 10 years ago278.3280.1545.6719.91228.11013.116465.02
11-20 years ago78.4642.9827.41015.41425.3119.619199.04
21-30 years ago27.51121.31212.4168.22017.5138.12095.16
31-40 years ago15.41513.3169.1194.12812.7166.02460.67
41-50 years ago9.31911.5176.2237.9207.7218.82051.58
over 50 years ago13.21621.31215.91438.1827.71073.65189.84
total422.11190.42116.7393.73119.03119.331061.21

calculated by unit of reference: protection forest region

© WSL, Swiss National Forest Inventory, 03.11.2014 #163364/149744
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