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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 NFI3/NFI4
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 ago68.941.63513.21183.83
11-20 years ago22.990.6585.01928.58
21-30 years ago10.6130.8502.13013.511
31-40 years ago7.1161.0441.4389.514
41-50 years ago4.6200.0.1.3386.018
over 50 years ago4.5210.6584.2219.314
total118.624.62027.27150.51
Eastern Juran/a0.21000.0.0.0.0.2100
less than 10 years ago24.470.0.1.73526.16
11-20 years ago11.1120.0.1.43712.511
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
total42.430.0.4.12246.62
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 ago3.9230.0.0.21004.122
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
total44.130.0.5.01949.12
Central Plateaun/a0.0.0.0.0.0.0.0.
less than 10 years ago47.640.0.5.41853.03
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 ago0.8500.0.0.4701.241
total59.730.0.9.41369.11
Eastern Plateaun/a0.0.0.0.0.0.0.0.
less than 10 years ago77.030.0.3.32480.23
11-20 years ago15.3110.0.1.04516.310
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 ago1.2410.0.0.21001.338
total102.110.0.5.519107.61
Western Pre-Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago7.1161.8348.51417.59
11-20 years ago3.7230.9454.4219.014
21-30 years ago2.6280.6582.0295.219
31-40 years ago1.0450.6582.0323.523
41-50 years ago1.4380.4711.3373.024
over 50 years ago1.7340.21003.1265.120
total17.694.52021.3843.33
Central Pre-Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago24.280.94523.4848.55
11-20 years ago12.1122.5299.41424.08
21-30 years ago3.0260.5573.8237.316
31-40 years ago3.9230.21001.5385.719
41-50 years ago2.7270.4711.1454.222
over 50 years ago5.3191.0453.4249.714
total51.255.61842.6599.42
Eastern Pre-Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago16.0100.85015.51032.36
11-20 years ago8.5150.4718.11517.010
21-30 years ago3.3250.4702.8276.417
31-40 years ago2.3290.0.3.1255.418
41-50 years ago1.9330.9441.2414.022
over 50 years ago4.1220.21002.9267.216
total36.162.72633.5672.32
Northwestern Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago6.8174.4217.81519.09
11-20 years ago3.8231.2414.0229.114
21-30 years ago3.3252.0314.0229.314
31-40 years ago1.6350.6582.1314.321
41-50 years ago2.0310.4702.5284.920
over 50 years ago6.2181.7354.42112.312
total23.7810.41324.8758.93
Central Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago2.5271.1413.4237.015
11-20 years ago2.1291.1392.0315.217
21-30 years ago2.3290.8501.0444.021
31-40 years ago1.0450.4710.6571.931
41-50 years ago0.6560.6570.4711.535
over 50 years ago3.7221.2400.8505.617
total12.1115.2188.11325.44
Northeastern Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago2.2282.1314.7208.913
11-20 years ago1.7341.1413.3236.216
21-30 years ago1.5380.5582.0304.121
31-40 years ago0.9440.5560.8512.228
41-50 years ago0.4720.4720.6591.537
over 50 years ago2.7261.9332.3276.916
total9.5136.61613.81029.85
Southwestern Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago7.3165.21913.01225.58
11-20 years ago4.0224.3216.31714.511
21-30 years ago2.2302.3285.3199.714
31-40 years ago3.6232.0313.9229.614
41-50 years ago3.0261.8335.31910.114
over 50 years ago14.2118.21522.0944.56
total34.3723.7855.84113.82
Southeastern Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago15.4113.22514.01232.67
11-20 years ago12.1123.92212.91228.88
21-30 years ago8.8153.0269.71421.59
31-40 years ago7.1162.4296.71716.211
41-50 years ago4.0221.9323.5239.414
over 50 years ago16.2114.52113.51234.27
total63.5519.01060.35142.82
Southern Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago4.4211.33812.01217.710
11-20 years ago2.8270.6586.5179.914
21-30 years ago2.7271.2418.01611.913
31-40 years ago4.1221.2417.81613.112
41-50 years ago2.6281.4389.41413.412
over 50 years ago15.3117.81560.9584.04
total32.0713.411104.53150.02
Switzerlandn/a0.4710.0.0.0.0.471
less than 10 years ago331.6222.59129.54483.61
11-20 years ago116.9416.61167.05200.53
21-30 years ago54.0612.11342.97109.14
31-40 years ago38.578.91531.2878.65
41-50 years ago26.298.21526.8861.26
over 50 years ago79.4527.28118.54225.23
total646.9195.74415.921158.51
© WSL, Swiss National Forest Inventory, 18.06.2020 #863132/329463
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