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NFI4
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: economic region
unit: 1000 ha
unit of evaluation: accessible forest without shrub forest
grid: 1.4 x 1.4 km grid
state2009/17
avalanches SilvaProtect
n/ainside perimeteroutside perimetertotal
economic regiontime of last treatment (classes of 10 years)1000 ha± %1000 ha± %1000 ha± %1000 ha± %
Western Juran/a0.0.0.0.0.0.0.0.
less than 10 years ago69.741.63513.21184.63
11-20 years ago23.590.6585.21929.37
21-30 years ago10.8130.8502.13013.711
31-40 years ago7.3161.0441.4389.714
41-50 years ago4.6200.0.1.3386.018
over 50 years ago4.7200.6584.2219.514
total120.624.62027.47152.71
Eastern Juran/a0.21000.0.0.0.0.2100
less than 10 years ago25.070.0.1.73526.76
11-20 years ago11.3120.0.1.43712.711
21-30 years ago2.9260.0.0.21003.125
31-40 years ago1.3400.0.0.4711.735
41-50 years ago0.8500.0.0.0.0.850
over 50 years ago1.7340.0.0.4712.231
total43.230.0.4.12247.42
Western Plateaun/a0.21000.0.0.0.0.2100
less than 10 years ago27.860.0.3.62331.45
11-20 years ago7.4160.0.0.6578.015
21-30 years ago4.1220.0.0.21004.322
31-40 years ago2.0310.0.0.21002.229
41-50 years ago1.1440.0.0.4701.537
over 50 years ago1.7350.0.0.0.1.735
total44.330.0.5.01949.22
Central Plateaun/a0.0.0.0.0.0.0.0.
less than 10 years ago48.040.0.5.41853.43
11-20 years ago9.3130.0.2.13011.512
21-30 years ago1.4370.0.0.8502.130
31-40 years ago0.6580.0.0.8501.437
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.8500.0.0.6571.437
total60.020.0.9.61369.71
Eastern Plateaun/a0.0.0.0.0.0.0.0.
less than 10 years ago77.730.0.3.32481.03
11-20 years ago15.7100.0.1.04516.710
21-30 years ago5.6180.0.1.0456.617
31-40 years ago2.0310.0.0.0.2.031
41-50 years ago1.0450.0.0.0.1.045
over 50 years ago1.4380.0.0.21001.635
total103.410.0.5.519108.91
Western Pre-Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago7.3161.8348.51417.79
11-20 years ago4.1220.9454.4219.414
21-30 years ago2.8270.6582.0295.418
31-40 years ago1.0450.6582.0323.523
41-50 years ago1.4380.4711.3373.024
over 50 years ago1.7340.21003.1265.120
total18.494.52021.3844.23
Central Pre-Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago25.280.94523.5849.75
11-20 years ago12.5122.7289.41424.68
21-30 years ago3.4240.5574.0237.916
31-40 years ago4.1220.21001.5385.918
41-50 years ago2.7270.4711.1454.222
over 50 years ago6.4171.0453.62311.113
total54.455.81843.25103.42
Eastern Pre-Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago16.8100.85015.51033.16
11-20 years ago9.0140.4718.11517.510
21-30 years ago3.5240.4703.0266.817
31-40 years ago2.3290.0.3.1255.418
41-50 years ago2.2300.9441.2414.321
over 50 years ago4.5210.21002.9267.616
total38.362.72633.8674.82
Northwestern Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago7.2164.4217.81519.49
11-20 years ago4.2211.2414.0229.514
21-30 years ago3.9232.0314.0229.913
31-40 years ago1.8330.6582.1314.521
41-50 years ago2.0310.4702.5284.920
over 50 years ago6.6171.7354.92013.111
total25.8810.41325.2761.43
Central Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago2.7261.3373.4237.414
11-20 years ago2.1291.3362.2295.617
21-30 years ago2.5280.8501.0444.221
31-40 years ago1.2410.4710.6572.130
41-50 years ago0.6560.6570.4711.535
over 50 years ago3.7221.2401.1416.017
total12.7105.6178.61326.94
Northeastern Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago2.5262.1314.9199.513
11-20 years ago1.7341.1413.3236.216
21-30 years ago2.1320.5582.0304.720
31-40 years ago1.0400.5560.8512.327
41-50 years ago0.7580.4720.6591.735
over 50 years ago3.3242.1312.7258.114
total11.4126.81614.3932.54
Southwestern Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago8.3155.21913.01226.58
11-20 years ago4.2224.3216.31714.711
21-30 years ago3.2252.3285.51910.913
31-40 years ago4.6212.0314.12210.813
41-50 years ago4.0222.0325.51911.513
over 50 years ago15.9118.21522.6846.75
total40.2623.9857.04121.12
Southeastern Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago16.3113.42414.61134.47
11-20 years ago12.1123.92213.11229.08
21-30 years ago10.8133.22510.11424.29
31-40 years ago7.1162.4296.71716.211
41-50 years ago4.2221.9323.7239.814
over 50 years ago19.0104.52114.51138.07
total69.5419.4962.74151.62
Southern Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago4.6211.33812.21218.110
11-20 years ago3.2250.6586.71710.513
21-30 years ago2.9261.2418.21512.312
31-40 years ago5.3191.2417.81614.311
41-50 years ago3.2251.4389.61414.211
over 50 years ago18.3107.81562.9488.93
total37.5713.411107.33158.32
Switzerlandn/a0.4710.0.0.0.0.471
less than 10 years ago339.3222.99130.64492.81
11-20 years ago120.3417.01167.75205.03
21-30 years ago59.8612.31344.27116.34
31-40 years ago41.778.91531.4882.05
41-50 years ago28.688.41527.4864.45
over 50 years ago89.7527.58123.73240.92
total679.7197.14425.121201.91
© WSL, Swiss National Forest Inventory, 18.06.2020 #863131/329462
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