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NFI2
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: protection forest region
unit: 1000 ha
unit of evaluation: accessible forest without shrub forest NFI1/NFI2/NFI3/NFI4
grid: 1.4 x 1.4 km grid
state1993/95
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern Alps Switzerland
avalanches SilvaProtecttime of last treatment (classes of 10 years)1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %
n/an/a0.0.0.0.0.0.0.0.0.4710.21000.658
less than 10 years ago230.1234.5722.195.91817.1102.927312.62
11-20 years ago85.0423.3912.6123.62312.0122.032138.54
21-30 years ago23.698.4155.0203.4244.2221.93346.46
31-40 years ago7.9164.0221.8332.3303.4242.42921.810
41-50 years ago3.2253.0262.4291.5351.9332.23014.212
over 50 years ago6.3188.0165.8187.71611.7138.61548.26
total356.0181.4449.7524.5850.6520.19582.41
inside perimetern/a0.0.0.0.0.0.0.0.0.0.0.0.0.0.
less than 10 years ago2.4298.3154.9205.0194.6211.63526.88
11-20 years ago1.0445.5192.5283.5234.1221.53518.210
21-30 years ago0.4712.5282.8262.9252.5281.63512.812
31-40 years ago0.4711.0451.2414.0211.8331.2419.614
41-50 years ago0.0.1.3411.0451.6350.6580.6585.020
over 50 years ago0.4711.2411.6355.8183.3245.41917.810
total4.72019.81014.01122.9817.01011.91290.24
outside perimetern/a0.0.0.0.0.0.0.4710.0.0.0.0.471
less than 10 years ago24.6937.1720.3910.01319.699.614121.34
11-20 years ago12.61221.5915.4106.91612.51210.01478.95
21-30 years ago4.82012.3124.9207.6165.6188.91444.07
31-40 years ago3.1254.3224.2227.0164.9209.91433.48
41-50 years ago1.9322.7282.1306.6173.62315.41132.48
over 50 years ago4.3217.4164.62113.0127.51637.3674.25
total51.4685.3451.5551.6553.7591.13384.62
totaln/a0.0.0.0.0.0.0.4710.4710.21001.045
less than 10 years ago257.2279.9447.4521.0941.3614.011460.72
11-20 years ago98.7450.3630.5714.01128.6813.512235.63
21-30 years ago28.7823.3912.61214.01112.41212.312103.24
31-40 years ago11.4139.3147.21613.41110.11413.41264.85
41-50 years ago5.1207.0175.5199.7146.11818.31051.66
over 50 years ago11.01316.71112.01226.6822.5951.35140.13
total412.11186.41115.2299.02121.32123.121057.11
© WSL, Swiss National Forest Inventory, 19.06.2020 #853452/319783
NFI1
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: protection forest region
unit: 1000 ha
unit of evaluation: forest
grid: terrestrial grid NFI1
state1983/85
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern Alps Switzerland
avalanches SilvaProtecttime of last treatment (classes of 10 years)1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %
n/an/a2.9194.9146.3137.51111.4913.9846.85
less than 10 years ago276.4149.2431.857.81122.964.016392.11
11-20 years ago58.3415.487.8115.0148.0113.51798.03
21-30 years ago13.297.0122.4203.3174.5152.42032.85
31-40 years ago5.3144.2152.0222.1225.0143.31722.07
41-50 years ago1.5261.5261.4271.0322.1221.0328.511
over 50 years ago13.3911.098.01111.9914.7810.41069.34
total371.0193.1359.7338.6568.5338.55669.41
inside perimetern/a0.11001.0320.7380.5451.0321.1304.415
less than 10 years ago2.12210.3104.8145.8137.3122.02232.25
11-20 years ago0.8354.3153.4174.9142.9182.42018.87
21-30 years ago0.6412.1221.8245.2142.4201.82313.88
31-40 years ago0.11001.4271.3282.7191.4271.8238.711
41-50 years ago0.0.0.11000.4501.2291.5261.8235.014
over 50 years ago0.5452.3213.0186.1133.2174.61519.77
total4.31521.5615.4826.3519.8715.58102.83
outside perimetern/a0.3580.8352.9192.0222.02212.9920.97
less than 10 years ago28.7646.0430.559.91024.1614.68153.92
11-20 years ago8.81120.079.6108.6109.71010.3966.94
21-30 years ago4.1167.8115.7138.7106.71211.7944.85
31-40 years ago2.5204.7143.7167.1124.91417.7740.65
41-50 years ago0.5452.2211.6252.4201.72410.9919.37
over 50 years ago5.0149.1105.81311.899.31032.4573.43
total49.9490.7359.8350.5358.53110.52419.81
totaln/a3.3186.7129.81010.01014.4827.9672.14
less than 10 years ago307.31105.4267.0323.4654.3420.67578.11
11-20 years ago67.9439.7520.8618.4720.7716.27183.62
21-30 years ago18.0717.079.91017.2713.6815.9891.53
31-40 years ago7.91110.4107.01212.0911.3922.7671.34
41-50 years ago2.0223.8163.4174.6145.41313.7832.95
over 50 years ago18.8722.4616.9729.8527.2647.44162.52
total425.10205.31134.81115.41146.81164.411191.90
© WSL, Swiss National Forest Inventory, 19.06.2020 #853453/319784
NFI2
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: protection forest region
unit: 1000 ha
unit of evaluation: accessible forest without shrub forest
grid: 1.4 x 1.4 km grid
state1993/95
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern Alps Switzerland
avalanches SilvaProtecttime of last treatment (classes of 10 years)1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %
n/an/a2.2301.4381.2410.8501.2410.21007.017
less than 10 years ago236.1236.2723.886.51718.5103.325324.32
11-20 years ago87.0424.0913.6124.82013.4123.523146.33
21-30 years ago24.199.1155.4194.0225.6192.33050.56
31-40 years ago8.3155.0201.8332.7274.0222.82724.69
41-50 years ago3.2253.4242.4292.0312.3302.82716.011
over 50 years ago7.31610.7137.0167.91614.61110.71358.26
total368.2189.7455.2528.8759.5525.68626.91
inside perimetern/a0.0.0.0.0.0.0.0.0.0.0.0.0.0.
less than 10 years ago2.4298.5155.1195.0194.8201.73327.68
11-20 years ago1.0445.7182.5283.9224.3211.53519.010
21-30 years ago0.4712.5283.0263.1252.5281.63513.212
31-40 years ago0.4711.0451.4384.0212.0321.24110.014
41-50 years ago0.0.1.3411.0451.6350.6580.6585.020
over 50 years ago0.4711.4381.8335.8183.5236.01818.910
total4.72020.4914.81123.5817.81012.71293.84
outside perimetern/a0.21000.0.0.21000.6581.2411.0453.225
less than 10 years ago25.0938.7721.7910.61320.4911.013127.54
11-20 years ago12.61221.9915.7107.31614.11110.41382.15
21-30 years ago4.82012.5125.7188.1155.8189.01445.86
31-40 years ago3.1255.1204.4217.0165.11910.11434.87
41-50 years ago1.9323.1262.3296.6173.62316.21033.87
over 50 years ago4.7207.9165.81813.4129.11440.6681.55
total52.4689.1455.9553.6559.3598.33408.72
totaln/a2.4291.4381.4381.4382.4291.24110.214
less than 10 years ago263.5283.4450.6522.2943.7616.011479.42
11-20 years ago100.7451.6631.9716.01031.8715.511247.43
21-30 years ago29.3824.1914.01115.21114.01112.912109.54
31-40 years ago11.81311.1137.61613.81111.11314.01169.45
41-50 years ago5.1207.7165.71810.2136.51719.6954.86
over 50 years ago12.51219.91014.61127.2827.1857.35158.63
total425.21199.21125.92105.92136.62136.621129.41
© WSL, Swiss National Forest Inventory, 19.06.2020 #853454/319785
NFI2
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: protection forest region
unit: 1000 ha
unit of evaluation: accessible forest without shrub forest
grid: terrestrial grid NFI2
state1993/95
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern Alps Switzerland
avalanches SilvaProtecttime of last treatment (classes of 10 years)1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %
n/an/a19.597.7156.0173.7225.4183.22345.56
less than 10 years ago232.2236.3723.986.51618.293.124320.22
11-20 years ago76.8421.3912.0124.22012.0123.123129.53
21-30 years ago21.398.1154.7193.5225.0192.03044.66
31-40 years ago7.3154.4201.6332.4273.6222.52721.89
41-50 years ago2.8253.1242.1291.8312.0302.52714.211
over 50 years ago6.6169.6136.1176.91613.0119.51351.76
total366.6190.5456.5529.0759.1526.08627.61
inside perimetern/a0.3711.8321.3351.9300.7500.8456.916
less than 10 years ago2.1297.5155.2185.4184.9191.93027.18
11-20 years ago0.9445.1182.2283.5223.8211.53317.010
21-30 years ago0.3712.3282.6262.8252.3281.43511.612
31-40 years ago0.4710.9451.2383.6211.8321.0418.914
41-50 years ago0.0.1.1410.9451.4350.6580.5584.420
over 50 years ago0.4711.2381.6335.2183.1235.41816.810
total4.52019.9914.91023.7817.11012.61192.74
outside perimetern/a3.3236.5164.5195.8175.5189.51335.27
less than 10 years ago23.9837.8622.1810.51221.0911.212126.54
11-20 years ago11.11219.6913.9106.51612.5119.31372.95
21-30 years ago4.22011.1125.0187.1155.1188.01440.56
31-40 years ago2.8254.6203.8216.2164.5198.91430.87
41-50 years ago1.7322.7262.1295.9173.22314.41129.97
over 50 years ago4.1207.0165.11811.8128.01436.1672.25
total51.1589.3356.5453.8459.9497.43408.12
totaln/a23.1816.11011.81211.51211.61213.61187.64
less than 10 years ago258.3281.7451.2522.3844.2516.110473.81
11-20 years ago88.8446.0628.1714.21028.3714.011219.43
21-30 years ago25.9821.4912.31113.41112.41211.41296.84
31-40 years ago10.4139.9136.71612.2119.91312.41161.55
41-50 years ago4.5206.9165.0189.0135.81717.4948.66
over 50 years ago11.11217.81012.81124.0824.0851.15140.73
total422.11199.71128.02106.42136.12136.021128.41
© WSL, Swiss National Forest Inventory, 19.06.2020 #853455/319786
NFI2
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: protection forest region
unit: 1000 ha
unit of evaluation: forest
grid: 1.4 x 1.4 km grid
state1993/95
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern Alps Switzerland
avalanches SilvaProtecttime of last treatment (classes of 10 years)1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %
n/an/a4.02210.51411.3138.31516.71116.61167.35
less than 10 years ago236.1236.4723.886.51718.5103.325324.52
11-20 years ago87.0424.0913.6124.82013.4123.523146.33
21-30 years ago24.199.1155.4194.0225.6192.33050.56
31-40 years ago8.3155.0201.8332.7274.0222.82724.69
41-50 years ago3.2253.4242.4292.0312.3302.82716.011
over 50 years ago7.31610.7137.2167.91614.61110.71358.46
total370.0199.0465.4536.2775.0441.96687.61
inside perimetern/a0.0.0.8501.0451.2411.5380.6585.020
less than 10 years ago2.4298.5155.1195.0194.8201.73327.68
11-20 years ago1.0445.7182.5283.9224.3211.53519.010
21-30 years ago0.4712.5283.0263.1252.5281.63513.212
31-40 years ago0.4711.0451.4384.0212.0321.24110.014
41-50 years ago0.0.1.3411.0451.6350.6580.6585.020
over 50 years ago0.6581.4381.8335.8183.7236.01819.310
total4.92021.2915.81124.7819.4913.21299.24
outside perimetern/a0.6581.8335.1203.1253.32418.01032.08
less than 10 years ago25.0939.0721.7910.81320.4911.013127.94
11-20 years ago12.61221.9915.7107.31614.11110.41382.15
21-30 years ago4.82012.5125.7188.1155.8189.01445.86
31-40 years ago3.1255.1204.4217.0165.11910.11434.87
41-50 years ago1.9323.1262.3296.6173.62316.41034.07
over 50 years ago4.7208.1165.81813.4129.11440.8681.95
total52.8691.4460.8456.4461.54115.83438.62
totaln/a4.62113.21217.41012.61221.5935.27104.44
less than 10 years ago263.5283.8450.6522.4943.7616.011480.02
11-20 years ago100.7451.6631.9716.01031.8715.511247.43
21-30 years ago29.3824.1914.01115.21114.01112.912109.54
31-40 years ago11.81311.1137.61613.81111.11314.01169.45
41-50 years ago5.1207.7165.71810.2136.51719.8955.06
over 50 years ago12.71220.11014.81127.2827.3857.55159.63
total427.61211.61142.02117.32155.92170.911225.30
© WSL, Swiss National Forest Inventory, 19.06.2020 #853456/319787
NFI2
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: protection forest region
unit: 1000 ha
unit of evaluation: forest
grid: terrestrial grid NFI2
state1993/95
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern Alps Switzerland
avalanches SilvaProtecttime of last treatment (classes of 10 years)1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %
n/an/a21.5917.31016.21011.21221.5919.09106.64
less than 10 years ago232.2236.5723.986.51618.293.124320.42
11-20 years ago76.8421.3912.0124.22012.0123.123129.53
21-30 years ago21.398.1154.7193.5225.0192.03044.66
31-40 years ago7.3154.4201.6332.4273.6222.52721.89
41-50 years ago2.8253.1242.1291.8312.0302.52714.211
over 50 years ago6.6169.6136.3166.91613.0119.51351.96
total368.51100.3366.9436.4675.2441.76689.01
inside perimetern/a0.3712.5272.2282.9242.0301.33511.312
less than 10 years ago2.1297.5155.2185.4184.9191.93027.18
11-20 years ago0.9445.1182.2283.5223.8211.53317.010
21-30 years ago0.3712.3282.6262.8252.3281.43511.612
31-40 years ago0.4710.9451.2383.6211.8321.0418.914
41-50 years ago0.0.1.1410.9451.4350.6580.5584.420
over 50 years ago0.5581.2381.6335.2183.2235.41817.110
total4.61920.6915.81024.7718.6913.11197.54
outside perimetern/a3.6228.6149.0148.1147.91526.0863.35
less than 10 years ago23.9838.0622.1810.61221.0911.212126.94
11-20 years ago11.11219.6913.9106.51612.5119.31372.95
21-30 years ago4.22011.1125.0187.1155.1188.01440.56
31-40 years ago2.8254.6203.8216.2164.5198.91430.87
41-50 years ago1.7322.7262.1295.9173.22314.51030.17
over 50 years ago4.1207.2165.11811.8128.01436.3672.65
total51.4591.7361.0456.3462.44114.32437.12
totaln/a25.4828.4827.4822.3831.4746.36181.23
less than 10 years ago258.3282.0451.2522.5844.2516.110474.31
11-20 years ago88.8446.0628.1714.21028.3714.011219.43
21-30 years ago25.9821.4912.31113.41112.41211.41296.84
31-40 years ago10.4139.9136.71612.2119.91312.41161.55
41-50 years ago4.5206.9165.0189.0135.81717.6948.86
over 50 years ago11.21218.01013.01124.0824.2851.25141.63
total424.61212.61143.72117.42156.22169.211223.60
© WSL, Swiss National Forest Inventory, 19.06.2020 #853457/319788
NFI1
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
state1983/85
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/a1.6350.0.0.0.1.635
less than 10 years ago77.542.72713.51193.63
11-20 years ago24.280.4714.62029.18
21-30 years ago6.1180.8502.7279.514
31-40 years ago1.4380.21001.9323.523
41-50 years ago0.7500.0.0.8501.535
over 50 years ago4.9200.6583.8229.314
total116.324.62027.28148.21
Eastern Juran/a0.21000.0.0.0.0.2100
less than 10 years ago31.750.0.2.33034.04
11-20 years ago5.3190.0.1.2406.517
21-30 years ago2.8270.0.0.6583.425
31-40 years ago1.1440.0.0.0.1.144
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.7570.0.0.0.0.757
total41.830.0.4.12246.02
Western Plateaun/a0.21000.0.0.0.0.2100
less than 10 years ago27.360.0.1.53828.86
11-20 years ago9.0140.0.1.24010.213
21-30 years ago3.2250.0.0.9504.122
31-40 years ago1.1440.0.0.0.1.144
41-50 years ago0.4710.0.0.0.0.471
over 50 years ago2.2300.0.1.6353.822
total43.530.0.5.21948.72
Central Plateaun/a0.0.0.0.0.0.0.0.
less than 10 years ago53.330.0.7.31560.72
11-20 years ago4.5200.0.1.2415.718
21-30 years ago1.3380.0.0.21001.535
31-40 years ago0.4700.0.0.21000.658
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago1.0450.21000.5581.733
total60.520.21009.41370.11
Eastern Plateaun/a0.0.0.0.0.0.0.0.
less than 10 years ago83.430.0.4.42187.82
11-20 years ago14.1110.0.0.65814.711
21-30 years ago1.8330.0.0.4712.130
31-40 years ago0.4710.0.0.0.0.471
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago2.6270.0.0.0.2.627
total102.320.0.5.519107.71
Western Pre-Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago7.2162.3298.51417.98
11-20 years ago3.5250.9457.41511.811
21-30 years ago1.6360.5721.4413.425
31-40 years ago1.6380.4711.4413.326
41-50 years ago0.6580.0.0.5571.141
over 50 years ago1.5390.4701.9343.823
total15.8104.52021.0841.33
Central Pre-Alpsn/a0.21000.0.0.0.0.2100
less than 10 years ago33.572.72828.1764.34
11-20 years ago7.0171.4388.91517.210
21-30 years ago2.3300.4712.3305.020
31-40 years ago1.7330.6581.0453.424
41-50 years ago1.1410.0.0.7491.831
over 50 years ago3.9220.6582.5277.016
total49.755.61843.6598.92
Eastern Pre-Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago22.680.94419.8943.45
11-20 years ago5.7181.3376.21713.212
21-30 years ago1.8330.21003.2255.219
31-40 years ago1.8330.0.1.9313.822
41-50 years ago0.5580.0.0.4710.944
over 50 years ago1.9330.21001.6353.823
total34.462.72633.1670.12
Northwestern Alpsn/a0.21000.21000.21000.658
less than 10 years ago6.9174.82010.51322.18
11-20 years ago4.3212.7274.62011.512
21-30 years ago2.6270.9503.5247.016
31-40 years ago1.8331.0452.1315.020
41-50 years ago0.4710.0.1.1401.535
over 50 years ago3.5241.0452.4287.017
total19.8910.61324.3754.73
Central Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago3.9221.1403.9218.913
11-20 years ago2.1301.3370.8494.220
21-30 years ago0.8500.8490.4711.931
31-40 years ago0.4710.21000.21000.850
41-50 years ago0.7480.21000.0.0.942
over 50 years ago2.5271.6352.0316.116
total10.5115.2177.21422.95
Northeastern Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago4.4211.8337.01513.310
11-20 years ago0.9441.6332.4294.919
21-30 years ago0.8510.9501.6333.324
31-40 years ago0.3701.1450.7492.130
41-50 years ago0.21000.0.0.9501.145
over 50 years ago1.7330.9440.9443.521
total8.3146.41613.51028.25
Southwestern Alpsn/a0.21000.0.0.5570.750
less than 10 years ago6.6174.62010.21321.49
11-20 years ago4.6214.52010.01419.19
21-30 years ago3.5245.2199.21417.910
31-40 years ago2.2302.0317.81511.912
41-50 years ago1.3381.0452.7265.019
over 50 years ago8.7155.81812.91227.58
total27.1823.1853.45103.62
Southeastern Alpsn/a0.4710.0.0.0.0.471
less than 10 years ago23.097.01722.8952.85
11-20 years ago6.4173.12510.21319.79
21-30 years ago5.4191.8337.81615.011
31-40 years ago4.1221.0454.8209.814
41-50 years ago1.6350.9451.5354.122
over 50 years ago13.4123.4238.31525.18
total54.3517.41055.35127.02
Southern Alpsn/a0.0.0.21000.0.0.2100
less than 10 years ago4.2221.73314.91120.89
11-20 years ago3.7232.03210.71316.310
21-30 years ago2.4291.63510.71314.611
31-40 years ago2.6280.85017.01020.59
41-50 years ago1.3381.24111.61314.111
over 50 years ago8.8154.72029.6743.16
total23.0912.11294.43129.52
Switzerlandn/a3.0260.4710.7504.122
less than 10 years ago385.6229.78154.73570.01
11-20 years ago95.0419.31069.95184.33
21-30 years ago36.3713.01244.7794.04
31-40 years ago20.8107.21739.1767.15
41-50 years ago9.1153.22420.11032.58
over 50 years ago57.5619.41068.25145.13
total607.4192.34397.321097.01
© WSL, Swiss National Forest Inventory, 19.06.2020 #853458/319789
NFI1
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: economic region
unit: 1000 ha
unit of evaluation: forest
grid: 1.4 x 1.4 km grid
state1983/85
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/a2.0320.0.0.21002.230
less than 10 years ago77.542.72713.51193.63
11-20 years ago24.380.4714.62029.37
21-30 years ago6.1180.8502.7279.514
31-40 years ago1.4380.21001.9323.523
41-50 years ago0.7500.0.0.8501.535
over 50 years ago4.9200.6583.8229.314
total116.924.62027.47148.91
Eastern Juran/a0.21000.0.0.0.0.2100
less than 10 years ago31.750.0.2.33034.04
11-20 years ago5.3190.0.1.2406.517
21-30 years ago2.8270.0.0.6583.425
31-40 years ago1.3400.0.0.0.1.340
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.7570.0.0.0.0.757
total42.130.0.4.12246.22
Western Plateaun/a0.6580.0.0.0.0.658
less than 10 years ago27.360.0.1.53828.86
11-20 years ago9.0140.0.1.24010.213
21-30 years ago3.2250.0.0.9504.122
31-40 years ago1.1440.0.0.0.1.144
41-50 years ago0.4710.0.0.0.0.471
over 50 years ago2.4280.0.1.6354.022
total44.130.0.5.21949.32
Central Plateaun/a0.0.0.0.0.0.0.0.
less than 10 years ago53.530.0.7.31560.92
11-20 years ago4.5200.0.1.2415.718
21-30 years ago1.3380.0.0.21001.535
31-40 years ago0.4700.0.0.21000.658
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago1.2410.21000.7502.130
total60.920.21009.61370.71
Eastern Plateaun/a0.0.0.0.0.0.0.0.
less than 10 years ago83.430.0.4.42187.82
11-20 years ago14.1110.0.0.65814.711
21-30 years ago1.9320.0.0.4712.329
31-40 years ago0.4710.0.0.0.0.471
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago2.6270.0.0.0.2.627
total102.420.0.5.519107.91
Western Pre-Alpsn/a0.6580.0.0.21000.850
less than 10 years ago7.2162.3298.51417.98
11-20 years ago3.5250.9457.41511.811
21-30 years ago1.6360.5721.4413.425
31-40 years ago1.6380.4711.4413.326
41-50 years ago0.6580.0.0.5571.141
over 50 years ago1.7360.6571.9344.322
total16.794.72021.2842.63
Central Pre-Alpsn/a1.8330.21000.21002.230
less than 10 years ago33.872.72828.1764.64
11-20 years ago7.2171.4388.91517.410
21-30 years ago2.5290.4712.3305.220
31-40 years ago1.7330.6581.0453.424
41-50 years ago1.1410.0.0.9442.030
over 50 years ago4.5210.6582.7267.715
total52.555.81844.25102.52
Eastern Pre-Alpsn/a0.9500.0.0.0.0.950
less than 10 years ago22.680.94419.8943.45
11-20 years ago5.7181.3376.21713.212
21-30 years ago1.8330.21003.2255.219
31-40 years ago1.8330.21001.9313.922
41-50 years ago0.5580.0.0.4710.944
over 50 years ago2.1310.21002.3304.621
total35.562.92533.8672.12
Northwestern Alpsn/a3.5240.8500.4714.721
less than 10 years ago7.1164.82010.51322.38
11-20 years ago4.3212.7274.62011.512
21-30 years ago2.6270.9503.5247.016
31-40 years ago1.8331.0452.1315.020
41-50 years ago0.4710.0.1.1401.535
over 50 years ago4.2221.0453.0258.215
total23.9811.21225.2760.23
Central Alpsn/a3.2250.4711.2414.820
less than 10 years ago4.1211.3373.9219.313
11-20 years ago2.1301.3370.8494.220
21-30 years ago0.8500.8490.4711.931
31-40 years ago0.4710.21000.21000.850
41-50 years ago0.7480.21000.0.0.942
over 50 years ago3.1241.6352.2296.915
total14.5105.8178.71329.04
Northeastern Alpsn/a2.3280.0.1.8354.122
less than 10 years ago4.6201.8337.01513.510
11-20 years ago0.9441.6332.4294.919
21-30 years ago0.8510.9501.6333.324
31-40 years ago0.3701.1451.4352.825
41-50 years ago0.21000.0.1.1451.341
over 50 years ago1.9311.2411.1404.220
total11.0126.71616.3834.04
Southwestern Alpsn/a7.3170.6581.5359.414
less than 10 years ago6.6174.62010.21321.49
11-20 years ago4.8204.52010.41319.79
21-30 years ago3.7235.4189.41418.510
31-40 years ago2.2302.0318.21512.412
41-50 years ago1.3381.0452.7265.019
over 50 years ago9.9146.21713.71129.97
total35.8724.3856.24116.22
Southeastern Alpsn/a12.0131.2411.73315.011
less than 10 years ago23.397.21622.8953.35
11-20 years ago6.6173.12510.21319.99
21-30 years ago5.6192.0327.81615.411
31-40 years ago4.7201.0454.82010.413
41-50 years ago1.6350.9451.5354.122
over 50 years ago14.4113.4238.81526.68
total68.1519.01057.55144.62
Southern Alpsn/a14.2111.24113.31228.68
less than 10 years ago4.2221.73314.91120.89
11-20 years ago3.9232.03210.71316.510
21-30 years ago2.4291.63510.91314.811
31-40 years ago2.6280.85017.61021.19
41-50 years ago1.6351.24111.81314.511
over 50 years ago10.0144.72031.4746.06
total38.8713.112110.53162.32
Switzerlandn/a48.564.42120.51073.55
less than 10 years ago386.8230.18154.73571.61
11-20 years ago96.0419.31070.35185.63
21-30 years ago37.1713.41245.1695.54
31-40 years ago21.7107.41640.8769.85
41-50 years ago9.3143.22420.7933.37
over 50 years ago63.7520.31073.25157.33
total663.2198.14425.321186.61
© WSL, Swiss National Forest Inventory, 19.06.2020 #853459/319790
NFI1
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 NFI1/NFI2/NFI3/NFI4
grid: 1.4 x 1.4 km grid
state1983/85
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/a1.6350.0.0.0.1.635
less than 10 years ago75.742.72713.31191.63
11-20 years ago23.590.4714.62028.58
21-30 years ago5.8180.8502.7279.314
31-40 years ago1.4380.21001.9323.523
41-50 years ago0.6580.0.0.8501.338
over 50 years ago4.7200.6583.6238.914
total113.324.62026.88144.81
Eastern Juran/a0.21000.0.0.0.0.2100
less than 10 years ago31.550.0.2.33033.84
11-20 years ago5.3190.0.1.2406.517
21-30 years ago2.8270.0.0.6583.425
31-40 years ago1.1440.0.0.0.1.144
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.7570.0.0.0.0.757
total41.630.0.4.12245.72
Western Plateaun/a0.21000.0.0.0.0.2100
less than 10 years ago26.360.0.1.53827.76
11-20 years ago8.8140.0.1.24010.013
21-30 years ago3.2250.0.0.9504.122
31-40 years ago1.1440.0.0.0.1.144
41-50 years ago0.4710.0.0.0.0.471
over 50 years ago2.0310.0.1.4383.524
total42.030.0.5.01947.02
Central Plateaun/a0.0.0.0.0.0.0.0.
less than 10 years ago52.830.0.7.31560.12
11-20 years ago4.3210.0.1.2415.518
21-30 years ago1.3380.0.0.21001.535
31-40 years ago0.4700.0.0.21000.658
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.8500.0.0.5581.338
total59.530.0.9.41369.01
Eastern Plateaun/a0.0.0.0.0.0.0.0.
less than 10 years ago82.130.0.4.42186.52
11-20 years ago13.7110.0.0.65814.311
21-30 years ago1.8330.0.0.4712.130
31-40 years ago0.4710.0.0.0.0.471
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago2.3290.0.0.0.2.329
total100.220.0.5.519105.61
Western Pre-Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago7.2162.3298.51417.98
11-20 years ago3.5250.7507.31511.512
21-30 years ago1.6360.5721.1463.126
31-40 years ago1.6380.4711.2453.127
41-50 years ago0.6580.0.0.5571.141
over 50 years ago1.3420.4701.9343.624
total15.6104.32120.4840.33
Central Pre-Alpsn/a0.21000.0.0.0.0.2100
less than 10 years ago32.172.72826.9861.74
11-20 years ago6.8171.4388.91517.110
21-30 years ago2.3300.4711.9334.621
31-40 years ago1.7330.6580.8503.225
41-50 years ago1.1410.0.0.7491.831
over 50 years ago3.7230.6582.3296.617
total47.955.61841.6595.12
Eastern Pre-Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago21.890.94419.4942.25
11-20 years ago5.1201.3375.81812.112
21-30 years ago1.8330.21003.2255.219
31-40 years ago1.8330.0.1.9313.822
41-50 years ago0.5580.0.0.4710.944
over 50 years ago1.9330.21001.4383.624
total32.962.72632.1667.73
Northwestern Alpsn/a0.21000.21000.21000.658
less than 10 years ago6.5174.62010.21321.38
11-20 years ago4.1222.5284.42110.913
21-30 years ago2.0310.9503.3256.217
31-40 years ago1.4381.0451.9334.421
41-50 years ago0.4710.0.1.1401.535
over 50 years ago2.9260.8502.4286.218
total17.61010.01323.5851.13
Central Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago3.3231.1403.7218.113
11-20 years ago1.9311.3370.8494.020
21-30 years ago0.8500.6570.21001.535
31-40 years ago0.4710.21000.21000.850
41-50 years ago0.7480.21000.0.0.942
over 50 years ago2.3281.4371.8325.617
total9.5124.8186.71520.95
Northeastern Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago4.2211.8336.81512.910
11-20 years ago0.9441.6332.0324.520
21-30 years ago0.6590.9501.6333.124
31-40 years ago0.3701.1450.7492.130
41-50 years ago0.21000.0.0.9501.145
over 50 years ago1.4370.9440.7493.024
total7.6156.41612.71026.65
Southwestern Alpsn/a0.21000.0.0.5570.750
less than 10 years ago6.0184.6209.81320.59
11-20 years ago4.0224.3219.11417.410
21-30 years ago3.3255.2199.21417.710
31-40 years ago2.2302.0317.81511.912
41-50 years ago1.3381.0452.7265.019
over 50 years ago7.5165.81812.41225.78
total24.5822.9851.6599.02
Southeastern Alpsn/a0.4710.0.0.0.0.471
less than 10 years ago21.896.81722.6951.25
11-20 years ago6.0183.12510.01419.19
21-30 years ago5.2191.8337.61614.611
31-40 years ago4.1221.0454.8209.814
41-50 years ago1.6350.9451.5354.122
over 50 years ago11.5133.2247.41622.19
total50.6517.01053.75121.32
Southern Alpsn/a0.0.0.21000.0.0.2100
less than 10 years ago3.0261.73314.31119.010
11-20 years ago3.5242.03210.31315.811
21-30 years ago2.2301.63510.51314.211
31-40 years ago2.6280.85016.61020.09
41-50 years ago1.0451.24111.41313.512
over 50 years ago7.8154.52128.0840.36
total20.1911.91291.13123.12
Switzerlandn/a3.0260.4710.7504.122
less than 10 years ago374.2229.38151.13554.51
11-20 years ago91.2418.71067.35177.23
21-30 years ago34.8812.81243.2790.85
31-40 years ago20.5107.21738.0765.75
41-50 years ago8.5153.22419.91031.78
over 50 years ago50.9618.51063.95133.34
total583.0190.14384.321057.41
© WSL, Swiss National Forest Inventory, 19.06.2020 #853460/319791
NFI1
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: terrestrial grid NFI1
state1983/85
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/a1.7250.0.0.0.1.725
less than 10 years ago80.332.12213.1895.62
11-20 years ago23.960.8354.51529.25
21-30 years ago5.6130.6412.4208.611
31-40 years ago2.2210.11001.8234.215
41-50 years ago0.8350.0.0.5451.328
over 50 years ago6.8120.4503.21710.410
total121.424.11625.56151.01
Eastern Juran/a0.2710.0.0.0.0.271
less than 10 years ago31.730.0.2.42034.03
11-20 years ago6.3120.0.0.9337.211
21-30 years ago2.0230.0.0.4502.320
31-40 years ago1.1300.0.0.11001.228
41-50 years ago0.11000.0.0.0.0.1100
over 50 years ago0.8370.0.0.11000.934
total42.120.0.3.91646.01
Western Plateaun/a0.3580.0.0.0.0.358
less than 10 years ago27.240.0.2.22129.44
11-20 years ago9.1100.0.1.13010.29
21-30 years ago3.0180.0.0.5443.617
31-40 years ago0.9330.0.0.0.0.933
41-50 years ago0.6410.0.0.0.0.641
over 50 years ago2.8190.0.1.2294.016
total44.020.0.5.11449.02
Central Plateaun/a0.2710.0.0.0.0.271
less than 10 years ago52.420.11007.21159.72
11-20 years ago4.8140.0.1.5266.312
21-30 years ago0.9330.0.0.3581.229
31-40 years ago0.5450.0.0.5451.031
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago1.0320.11000.4501.526
total59.820.2719.8969.91
Eastern Plateaun/a0.0.0.0.0.11000.1100
less than 10 years ago83.920.0.3.61687.52
11-20 years ago14.280.0.0.73814.98
21-30 years ago1.9230.0.0.5452.420
31-40 years ago0.5450.0.0.11000.641
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago1.8230.0.0.0.1.823
total102.210.0.5.014107.21
Western Pre-Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago6.5122.1219.0917.66
11-20 years ago3.4171.1306.91111.58
21-30 years ago2.3200.4502.4205.113
31-40 years ago1.1300.6411.6253.317
41-50 years ago0.3580.0.0.4500.738
over 50 years ago1.6260.3582.2214.115
total15.274.61422.4542.22
Central Pre-Alpsn/a0.2710.2710.3580.738
less than 10 years ago34.752.71927.8565.23
11-20 years ago7.7111.0327.81116.57
21-30 years ago2.1220.6412.4205.114
31-40 years ago1.7240.3581.0323.018
41-50 years ago0.7380.0.0.8351.426
over 50 years ago4.6140.4503.0188.011
total51.735.21443.14100.01
Eastern Pre-Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago23.161.13020.3644.43
11-20 years ago5.1140.8336.21212.18
21-30 years ago1.2290.3583.5175.014
31-40 years ago1.2290.0.2.0223.117
41-50 years ago0.6410.0.0.6411.229
over 50 years ago2.0220.2701.8234.015
total33.142.42034.3469.82
Northwestern Alpsn/a0.11000.11000.11000.358
less than 10 years ago7.4115.4139.21022.06
11-20 years ago4.2152.3204.91411.49
21-30 years ago2.3211.1303.0186.512
31-40 years ago1.3280.5452.1214.015
41-50 years ago0.5450.11000.8351.426
over 50 years ago3.2171.4273.0187.611
total19.0611.0923.2553.22
Central Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago3.5171.5254.2159.39
11-20 years ago1.9221.0311.2304.115
21-30 years ago0.6411.1310.6452.221
31-40 years ago0.4490.3570.3581.131
41-50 years ago0.5440.3580.2711.031
over 50 years ago2.8191.6251.6256.012
total9.795.8128.1923.74
Northeastern Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago5.0132.1216.01213.17
11-20 years ago0.7381.5252.1214.214
21-30 years ago0.6410.4501.6252.619
31-40 years ago0.4500.8350.8332.121
41-50 years ago0.3580.11000.7381.130
over 50 years ago2.4201.0321.6255.013
total9.495.91212.8728.23
Southwestern Alpsn/a0.4500.11000.7381.129
less than 10 years ago7.7115.8139.61023.06
11-20 years ago4.8144.9148.31117.97
21-30 years ago3.2175.1148.51016.87
31-40 years ago2.1222.7196.91211.89
41-50 years ago1.0321.1302.4204.515
over 50 years ago10.695.71311.0927.36
total29.8525.3547.34102.42
Southeastern Alpsn/a0.3580.11000.0.0.450
less than 10 years ago22.867.21224.0654.04
11-20 years ago7.9112.9189.61020.57
21-30 years ago4.4152.3216.61213.38
31-40 years ago4.7151.3284.81410.89
41-50 years ago2.1221.5261.7245.413
over 50 years ago13.683.2178.61125.46
total55.8418.6755.33129.71
Southern Alpsn/a0.0.0.11000.0.0.1100
less than 10 years ago4.0162.02214.5820.57
11-20 years ago3.4172.42010.21016.08
21-30 years ago2.4201.82311.6915.88
31-40 years ago3.0181.82317.1721.86
41-50 years ago0.8351.82310.6913.28
over 50 years ago9.0104.61530.4544.04
total22.6614.5894.32131.41
Switzerlandn/a3.4170.6411.1295.114
less than 10 years ago390.3132.05153.12575.41
11-20 years ago97.3318.8765.84181.92
21-30 years ago32.4613.8944.2590.43
31-40 years ago21.378.51139.1568.94
41-50 years ago8.2114.91418.6731.85
over 50 years ago63.0418.9768.24150.02
total615.8197.63390.311103.60
© WSL, Swiss National Forest Inventory, 19.06.2020 #853461/319792
NFI1
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: economic region
unit: 1000 ha
unit of evaluation: forest
grid: terrestrial grid NFI1
state1983/85
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/a1.9230.11000.2712.221
less than 10 years ago80.332.12213.3895.72
11-20 years ago24.060.8354.51529.35
21-30 years ago5.6130.6412.4208.611
31-40 years ago2.2210.11001.8234.215
41-50 years ago0.8350.0.0.5451.328
over 50 years ago6.9120.4503.21710.510
total121.924.21625.86151.91
Eastern Juran/a0.2710.0.0.0.0.271
less than 10 years ago31.730.0.2.42034.03
11-20 years ago6.3120.0.0.9337.211
21-30 years ago2.0230.0.0.4502.320
31-40 years ago1.2280.0.0.11001.327
41-50 years ago0.11000.0.0.0.0.1100
over 50 years ago0.8370.0.0.11000.934
total42.220.0.3.91646.11
Western Plateaun/a0.5450.0.0.0.0.545
less than 10 years ago27.340.0.2.22129.54
11-20 years ago9.1100.0.1.13010.29
21-30 years ago3.0180.0.0.5443.617
31-40 years ago0.9330.0.0.0.0.933
41-50 years ago0.6410.0.0.0.0.641
over 50 years ago2.9180.0.1.2294.115
total44.420.0.5.11449.52
Central Plateaun/a0.2710.0.0.0.0.271
less than 10 years ago52.520.11007.31159.92
11-20 years ago4.9140.0.1.6256.512
21-30 years ago0.9330.0.0.3581.229
31-40 years ago0.5450.0.0.5451.031
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago1.1300.11000.5451.724
total60.120.27110.1970.41
Eastern Plateaun/a0.0.0.0.0.11000.1100
less than 10 years ago84.020.0.3.61687.62
11-20 years ago14.280.0.0.73814.98
21-30 years ago2.0220.0.0.5452.520
31-40 years ago0.5450.0.0.11000.641
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago1.8230.0.0.0.1.823
total102.410.0.5.014107.41
Western Pre-Alpsn/a0.5450.11000.2710.835
less than 10 years ago6.5122.1219.0917.66
11-20 years ago3.4171.1306.91111.58
21-30 years ago2.3200.4502.5205.113
31-40 years ago1.1300.6411.6253.317
41-50 years ago0.3580.0.0.4500.738
over 50 years ago1.8240.4502.2214.415
total15.974.81422.7543.42
Central Pre-Alpsn/a1.2290.3580.4501.923
less than 10 years ago34.952.71927.9565.53
11-20 years ago7.8111.0327.91116.77
21-30 years ago2.3210.6412.4205.413
31-40 years ago1.7240.3581.1303.118
41-50 years ago0.7380.0.0.9331.525
over 50 years ago5.0140.4503.1178.510
total53.635.31343.74102.61
Eastern Pre-Alpsn/a0.5450.0.0.0.0.545
less than 10 years ago23.161.13020.3644.43
11-20 years ago5.2140.8336.31212.38
21-30 years ago1.2290.3583.5175.014
31-40 years ago1.2290.11002.0223.217
41-50 years ago0.6410.0.0.6411.229
over 50 years ago2.3210.4502.2215.014
total34.042.71934.8471.52
Northwestern Alpsn/a3.1170.6410.2714.016
less than 10 years ago7.7115.4139.31022.46
11-20 years ago4.2152.3204.91411.49
21-30 years ago2.4201.1303.0186.612
31-40 years ago1.4270.5452.1214.115
41-50 years ago0.5450.11000.9331.525
over 50 years ago4.2151.5263.8169.510
total23.5611.6824.3559.42
Central Alpsn/a3.4170.5451.5275.413
less than 10 years ago3.6161.6244.2159.59
11-20 years ago1.9221.0311.2304.115
21-30 years ago0.6411.1310.6452.221
31-40 years ago0.4490.3570.3581.131
41-50 years ago0.5440.3580.2711.031
over 50 years ago3.2171.6251.8246.512
total13.676.4119.7829.83
Northeastern Alpsn/a2.4200.2701.4264.015
less than 10 years ago5.1132.1216.01213.27
11-20 years ago0.7381.5252.1214.214
21-30 years ago0.6410.4501.7242.719
31-40 years ago0.4501.0331.3262.619
41-50 years ago0.3580.11000.8351.229
over 50 years ago2.5191.1301.8235.413
total12.086.41115.2633.53
Southwestern Alpsn/a7.5110.5452.02210.010
less than 10 years ago7.8115.8139.91023.46
11-20 years ago5.0144.9148.61018.47
21-30 years ago3.3175.2148.71017.27
31-40 years ago2.1222.7197.11212.09
41-50 years ago1.0321.2292.4204.614
over 50 years ago11.996.11311.8929.85
total38.6526.3550.53115.41
Southeastern Alpsn/a11.491.0322.02214.48
less than 10 years ago22.967.31224.1654.34
11-20 years ago8.0112.9189.71020.77
21-30 years ago4.5152.4206.71213.68
31-40 years ago5.0141.4274.91411.39
41-50 years ago2.1221.5261.7245.413
over 50 years ago14.783.2179.31027.26
total68.5319.8758.53146.81
Southern Alpsn/a13.981.13012.9927.96
less than 10 years ago4.0162.02214.6820.67
11-20 years ago3.5172.42010.3916.27
21-30 years ago2.4201.82311.7915.98
31-40 years ago3.3171.82317.7722.76
41-50 years ago1.0321.82310.9913.78
over 50 years ago10.4104.61532.4547.44
total38.5515.58110.52164.41
Switzerlandn/a46.854.51520.9772.24
less than 10 years ago391.5132.25154.02577.71
11-20 years ago98.1318.8766.64183.52
21-30 years ago33.0514.0844.8591.83
31-40 years ago22.178.81140.6571.54
41-50 years ago8.4115.01419.2732.75
over 50 years ago69.5419.8773.43162.72
total669.31103.23419.611192.20
© WSL, Swiss National Forest Inventory, 19.06.2020 #853462/319793
NFI2
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 NFI1/NFI2/NFI3/NFI4
grid: 1.4 x 1.4 km grid
state1993/95
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 ago62.942.42911.21376.54
11-20 years ago30.571.0446.51738.06
21-30 years ago13.1120.4712.72716.210
31-40 years ago2.9260.4711.9315.219
41-50 years ago0.6580.0.1.7332.329
over 50 years ago3.3240.4712.8266.617
total113.324.62026.88144.81
Eastern Juran/a0.0.0.0.0.0.0.0.
less than 10 years ago25.060.0.1.34126.36
11-20 years ago11.7110.0.1.63513.410
21-30 years ago1.7350.0.0.6582.330
31-40 years ago2.0330.0.0.6582.629
41-50 years ago0.8490.0.0.0.0.849
over 50 years ago0.31000.0.0.0.0.3100
total41.630.0.4.12245.72
Western Plateaun/a0.0.0.0.0.0.0.0.
less than 10 years ago24.270.0.2.92627.16
11-20 years ago10.4130.0.0.57010.812
21-30 years ago3.0260.0.0.4703.324
31-40 years ago2.2310.0.0.21002.429
41-50 years ago1.1440.0.0.0.1.144
over 50 years ago1.3410.0.1.0452.330
total42.030.0.5.01947.02
Central Plateaun/a0.0.0.0.0.0.0.0.
less than 10 years ago43.640.0.5.21948.84
11-20 years ago13.0110.0.2.92515.910
21-30 years ago1.8330.0.0.6582.429
31-40 years ago0.4710.0.0.21000.658
41-50 years ago0.4700.0.0.21000.658
over 50 years ago0.4710.0.0.4710.750
total59.530.0.9.41369.01
Eastern Plateaun/a0.0.0.0.0.0.0.0.
less than 10 years ago74.230.0.3.92278.13
11-20 years ago19.590.0.1.04520.59
21-30 years ago4.2210.0.0.4714.620
31-40 years ago0.8500.0.0.21001.045
41-50 years ago0.4710.0.0.0.0.471
over 50 years ago1.1410.0.0.0.1.141
total100.220.0.5.519105.61
Western Pre-Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago5.7181.6367.31614.510
11-20 years ago4.3211.5365.21911.112
21-30 years ago1.9340.6584.1206.516
31-40 years ago1.1410.21000.9512.230
41-50 years ago1.2450.0.0.7591.935
over 50 years ago1.4380.4702.2304.122
total15.6104.32120.4840.33
Central Pre-Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago21.892.42922.5946.65
11-20 years ago15.7111.63510.31327.67
21-30 years ago4.0220.4714.8209.314
31-40 years ago1.7350.4711.3413.325
41-50 years ago1.0450.4710.7582.032
over 50 years ago3.8220.4712.1306.317
total47.955.61841.6595.12
Eastern Pre-Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago16.4101.04512.31229.77
11-20 years ago8.8150.65711.11220.59
21-30 years ago3.0260.9442.9256.816
31-40 years ago0.8500.0.2.4293.325
41-50 years ago1.6350.0.1.5353.225
over 50 years ago2.2300.21001.8334.321
total32.962.72632.1667.73
Northwestern Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago6.7174.3217.41618.49
11-20 years ago3.2252.4286.31711.912
21-30 years ago2.6271.6353.0257.316
31-40 years ago1.2400.4702.3303.922
41-50 years ago1.0450.8501.5373.424
over 50 years ago2.8270.4712.9256.118
total17.61010.01323.5851.13
Central Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago3.7221.9313.1248.712
11-20 years ago1.5350.4711.1403.024
21-30 years ago1.4371.0440.6572.924
31-40 years ago0.4710.6570.21001.240
41-50 years ago0.4710.21000.0.0.658
over 50 years ago2.1290.8491.6344.519
total9.5124.8186.71520.95
Northeastern Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago2.4291.8315.0199.113
11-20 years ago2.3281.7353.2247.215
21-30 years ago0.5580.8511.3382.726
31-40 years ago0.6590.7581.4352.726
41-50 years ago0.3700.9500.5581.733
over 50 years ago1.4370.6581.2413.224
total7.6156.41612.71026.65
Southwestern Alpsn/a0.0.0.0.0.4710.471
less than 10 years ago5.9185.01910.01321.09
11-20 years ago3.6233.5236.91614.011
21-30 years ago3.4242.9257.61614.011
31-40 years ago2.3304.0217.01613.411
41-50 years ago1.5351.6356.6179.714
over 50 years ago7.7165.81813.01226.68
total24.5822.9851.6599.02
Southeastern Alpsn/a0.4710.0.0.0.0.471
less than 10 years ago17.1104.62119.6941.36
11-20 years ago12.0124.12212.51228.68
21-30 years ago4.2222.5285.61812.412
31-40 years ago3.4241.8334.92010.114
41-50 years ago1.9330.6583.6236.118
over 50 years ago11.7133.3247.51622.59
total50.6517.01053.75121.32
Southern Alpsn/a0.21000.0.0.0.0.2100
less than 10 years ago2.9271.6359.61414.011
11-20 years ago2.0321.53510.01413.512
21-30 years ago1.9331.6358.91412.312
31-40 years ago2.4291.2419.91413.412
41-50 years ago2.2300.65815.41118.310
over 50 years ago8.6155.41937.3651.35
total20.1911.91291.13123.12
Switzerlandn/a0.6580.0.0.4711.045
less than 10 years ago312.4226.58121.44460.22
11-20 years ago138.6418.31079.35236.23
21-30 years ago46.6612.81243.67103.04
31-40 years ago22.3109.71433.3865.35
41-50 years ago14.4125.12032.5852.06
over 50 years ago48.1617.81073.85139.73
total583.0190.14384.321057.41
© WSL, Swiss National Forest Inventory, 19.06.2020 #853463/319794
NFI2
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
state1993/95
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/a1.0450.0.0.21001.241
less than 10 years ago65.142.42911.51279.14
11-20 years ago31.371.0446.51738.96
21-30 years ago13.5120.4712.72716.510
31-40 years ago3.1250.4711.9315.419
41-50 years ago0.6580.0.1.7332.329
over 50 years ago4.0220.4713.0257.416
total118.624.62027.67150.81
Eastern Juran/a0.0.0.0.0.0.0.0.
less than 10 years ago25.760.0.1.34127.06
11-20 years ago11.7110.0.1.63513.410
21-30 years ago1.7350.0.0.6582.330
31-40 years ago2.0330.0.0.6582.629
41-50 years ago0.8490.0.0.0.0.849
over 50 years ago0.31000.0.0.0.0.3100
total42.230.0.4.12246.42
Western Plateaun/a0.8500.0.0.0.0.850
less than 10 years ago25.470.0.2.92628.46
11-20 years ago10.8120.0.0.57011.312
21-30 years ago3.0260.0.0.4703.324
31-40 years ago2.2310.0.0.21002.429
41-50 years ago1.1440.0.0.0.1.144
over 50 years ago1.5380.0.1.2402.627
total44.730.0.5.21949.92
Central Plateaun/a0.0.0.0.0.0.0.0.
less than 10 years ago43.940.0.5.21949.14
11-20 years ago13.4110.0.2.92516.310
21-30 years ago2.0310.0.0.6582.627
31-40 years ago0.4710.0.0.21000.658
41-50 years ago0.4700.0.0.21000.658
over 50 years ago0.4710.0.0.4710.750
total60.520.0.9.41369.91
Eastern Plateaun/a0.3710.0.0.0.0.371
less than 10 years ago75.730.0.3.92279.63
11-20 years ago19.990.0.1.04520.89
21-30 years ago4.2210.0.0.4714.620
31-40 years ago1.0450.0.0.21001.141
41-50 years ago0.4710.0.0.0.0.471
over 50 years ago1.3380.0.0.0.1.338
total102.810.0.5.519108.21
Western Pre-Alpsn/a0.0.0.0.0.0.0.0.
less than 10 years ago6.3171.6367.51615.310
11-20 years ago4.3211.5365.21911.112
21-30 years ago2.1320.6584.2196.915
31-40 years ago1.3380.21000.9512.429
41-50 years ago1.2450.0.0.9512.133
over 50 years ago1.9340.6572.4295.020
total17.194.52021.2842.73
Central Pre-Alpsn/a0.6580.0.0.0.0.658
less than 10 years ago22.692.42923.4848.45
11-20 years ago16.3101.63510.61328.47
21-30 years ago4.4210.4714.8209.714
31-40 years ago1.9330.4711.7353.923
41-50 years ago1.0450.4710.7582.032
over 50 years ago4.8200.4712.3297.415
total51.455.61843.45100.52
Eastern Pre-Alpsn/a0.21000.0.0.0.0.2100
less than 10 years ago16.6101.04512.91230.56
11-20 years ago9.6140.65711.51221.78
21-30 years ago3.2250.9443.3247.416
31-40 years ago0.8500.0.2.4293.325
41-50 years ago1.6350.0.1.7333.424
over 50 years ago2.2300.21002.4294.920
total34.462.72634.3671.42
Northwestern Alpsn/a0.8500.0.0.0.0.850
less than 10 years ago6.9164.5217.91519.29
11-20 years ago3.2252.6276.61712.412
21-30 years ago2.6271.6353.0257.316
31-40 years ago1.8330.4702.7274.920
41-50 years ago1.4380.8501.7354.022
over 50 years ago4.0220.4712.9257.316
total20.8910.31324.8755.93
Central Alpsn/a0.4710.0.0.0.0.471
less than 10 years ago4.5192.1293.62210.211
11-20 years ago1.7330.4711.1403.223
21-30 years ago1.6351.2400.8503.522
31-40 years ago0.4710.8490.4711.534
41-50 years ago0.4710.21000.0.0.658
over 50 years ago2.3280.8491.8324.918
total11.3115.4177.61424.34
Northeastern Alpsn/a0.6580.0.0.21000.850
less than 10 years ago3.0261.8315.31810.112
11-20 years ago2.3281.7353.2247.215
21-30 years ago0.5580.8511.5352.925
31-40 years ago0.6590.7581.4352.726
41-50 years ago0.3700.9500.5581.733
over 50 years ago2.3280.7501.6354.619
total9.7136.61613.81030.04
Southwestern Alpsn/a0.8500.0.0.6581.438
less than 10 years ago6.5175.01910.61322.29
11-20 years ago4.8203.9227.31616.010
21-30 years ago4.0223.1258.11515.211
31-40 years ago2.7274.0217.01613.811
41-50 years ago2.0311.6356.61710.213
over 50 years ago7.9165.81813.41227.28
total28.8723.5853.65105.92
Southeastern Alpsn/a1.2410.0.1.2412.429
less than 10 years ago18.5104.82020.4943.76
11-20 years ago13.4124.32114.11131.87
21-30 years ago5.6192.5285.81814.011
31-40 years ago4.0222.0325.11911.113
41-50 years ago2.3300.6583.6236.517
over 50 years ago14.6113.5239.11427.18
total59.5517.81059.35136.62
Southern Alpsn/a0.21000.0.1.0451.241
less than 10 years ago3.3251.73311.01316.011
11-20 years ago3.5231.53510.41315.511
21-30 years ago2.3301.6359.01412.912
31-40 years ago2.8271.24110.11414.011
41-50 years ago2.8270.65816.21019.69
over 50 years ago10.7136.01840.6657.35
total25.6812.71298.33136.62
Switzerlandn/a7.0170.0.3.12510.214
less than 10 years ago324.0227.38127.54478.82
11-20 years ago146.4319.11082.55248.13
21-30 years ago50.6613.21245.46109.24
31-40 years ago25.0910.11434.7769.85
41-50 years ago16.2115.12033.9755.26
over 50 years ago58.0618.91081.05158.03
total627.4193.64408.221129.21
© WSL, Swiss National Forest Inventory, 19.06.2020 #853464/319795
NFI2
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: terrestrial grid NFI2
state1993/95
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/a7.3150.3711.5339.213
less than 10 years ago64.342.12911.21277.64
11-20 years ago27.970.9445.81734.66
21-30 years ago12.1120.3712.42714.810
31-40 years ago2.8250.4711.7314.919
41-50 years ago0.5580.0.1.5332.129
over 50 years ago3.6220.4712.7256.616
total118.624.42026.87149.81
Eastern Juran/a2.2280.0.0.21002.427
less than 10 years ago25.360.0.1.43826.76
11-20 years ago10.4120.0.1.43511.811
21-30 years ago1.5350.0.0.5582.130
31-40 years ago1.8330.0.0.5582.329
41-50 years ago0.7490.0.0.0.0.749
over 50 years ago0.31000.0.0.0.0.3100
total42.330.0.4.12146.32
Western Plateaun/a2.8240.0.0.7503.622
less than 10 years ago24.760.0.2.72527.46
11-20 years ago9.5120.0.0.4709.912
21-30 years ago2.5260.0.0.3702.925
31-40 years ago1.8310.0.0.21002.029
41-50 years ago0.9450.0.0.0.0.945
over 50 years ago1.3380.0.1.0412.327
total43.730.0.5.41749.12
Central Plateaun/a3.2220.0.0.7503.820
less than 10 years ago43.140.0.4.91848.03
11-20 years ago11.7110.0.2.52514.310
21-30 years ago1.7310.0.0.5582.227
31-40 years ago0.4710.0.0.21000.558
41-50 years ago0.3700.0.0.21000.558
over 50 years ago0.3710.0.0.3710.650
total60.720.0.9.21370.01
Eastern Plateaun/a4.0200.0.0.21004.220
less than 10 years ago74.330.0.3.82178.13
11-20 years ago17.490.0.0.84518.29
21-30 years ago3.6210.0.0.4714.020
31-40 years ago0.9450.0.0.21001.041
41-50 years ago0.3710.0.0.0.0.371
over 50 years ago1.2380.0.0.0.1.238
total101.710.0.5.318107.01
Western Pre-Alpsn/a1.8320.4721.6333.821
less than 10 years ago6.0161.4357.21514.69
11-20 years ago3.9211.4354.81910.012
21-30 years ago1.8320.5583.9196.215
31-40 years ago1.2380.21000.8512.129
41-50 years ago1.0450.0.0.8511.833
over 50 years ago1.7330.6572.2294.420
total17.494.41921.2742.93
Central Pre-Alpsn/a4.5200.5582.7267.715
less than 10 years ago23.282.12922.9848.35
11-20 years ago14.4101.4359.31325.17
21-30 years ago3.9210.4714.2208.514
31-40 years ago1.6330.3711.5353.423
41-50 years ago0.9450.4710.6581.831
over 50 years ago4.3200.3712.1296.715
total52.945.51843.25101.62
Eastern Pre-Alpsn/a3.3230.3712.7256.416
less than 10 years ago15.9101.23813.21130.36
11-20 years ago8.5140.55710.01219.09
21-30 years ago2.8250.8442.9246.516
31-40 years ago0.7500.0.2.1292.925
41-50 years ago1.4350.0.1.5333.024
over 50 years ago1.9300.21002.1294.220
total34.663.02334.6572.32
Northwestern Alpsn/a1.5350.9452.3274.719
less than 10 years ago6.8164.0217.41518.29
11-20 years ago2.9252.3275.91711.112
21-30 years ago2.4271.5352.7266.616
31-40 years ago1.6330.4702.4274.420
41-50 years ago1.3380.7501.5353.522
over 50 years ago3.6230.4712.6256.516
total20.0810.21224.9755.13
Central Alpsn/a1.7310.5570.7502.924
less than 10 years ago4.8172.2273.22210.211
11-20 years ago1.5330.3711.0402.823
21-30 years ago1.3351.0400.7503.023
31-40 years ago0.3710.6490.3711.335
41-50 years ago0.4710.21000.0.0.558
over 50 years ago2.0280.7491.6334.319
total12.1105.5167.51325.04
Northeastern Alpsn/a0.9450.5591.0412.427
less than 10 years ago3.6221.6315.71610.911
11-20 years ago2.1291.5352.9246.515
21-30 years ago0.5580.7511.4352.625
31-40 years ago0.6590.6581.2352.426
41-50 years ago0.3700.8510.5581.533
over 50 years ago2.0280.7501.4354.119
total9.9126.31514.2930.44
Southwestern Alpsn/a3.7221.9305.81711.512
less than 10 years ago6.5165.41810.51222.38
11-20 years ago4.2203.5226.51614.210
21-30 years ago3.5222.8257.11513.411
31-40 years ago2.4273.6216.21612.211
41-50 years ago1.8311.4355.9179.013
over 50 years ago6.9165.21811.81224.08
total29.0723.7853.84106.42
Southeastern Alpsn/a5.4180.7505.51811.612
less than 10 years ago18.294.91921.0944.25
11-20 years ago12.0123.82112.51128.37
21-30 years ago5.0192.3285.11812.412
31-40 years ago3.6221.8324.5199.913
41-50 years ago2.0300.6583.2235.817
over 50 years ago13.0113.1238.01424.08
total59.1517.11059.94136.12
Southern Alpsn/a3.2230.8459.51313.611
less than 10 years ago3.1241.93011.21216.110
11-20 years ago3.1231.5339.31314.011
21-30 years ago2.0301.4358.01411.412
31-40 years ago2.5271.0418.91412.411
41-50 years ago2.5270.55814.41117.49
over 50 years ago9.5135.41836.1651.15
total26.0812.61197.43136.02
Switzerlandn/a45.566.91635.2787.74
less than 10 years ago319.7226.78126.44472.91
11-20 years ago129.7317.11073.15219.93
21-30 years ago44.8611.61240.1696.64
31-40 years ago22.299.01430.8761.95
41-50 years ago14.4114.52030.0748.96
over 50 years ago51.6616.81071.95140.33
total627.9192.74407.621128.11
© WSL, Swiss National Forest Inventory, 19.06.2020 #853465/319796
NFI2
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: economic region
unit: 1000 ha
unit of evaluation: forest
grid: 1.4 x 1.4 km grid
state1993/95
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/a1.6350.0.0.4712.032
less than 10 years ago65.142.42911.51279.14
11-20 years ago31.371.0446.51738.96
21-30 years ago13.5120.4712.72716.510
31-40 years ago3.1250.4711.9315.419
41-50 years ago0.6580.0.1.7332.329
over 50 years ago4.0220.4713.0257.416
total119.224.62027.87151.61
Eastern Juran/a0.21000.0.0.0.0.2100
less than 10 years ago25.760.0.1.34127.06
11-20 years ago11.7110.0.1.63513.410
21-30 years ago1.7350.0.0.6582.330
31-40 years ago2.0330.0.0.6582.629
41-50 years ago0.8490.0.0.0.0.849
over 50 years ago0.31000.0.0.0.0.3100
total42.530.0.4.12246.62
Western Plateaun/a1.5380.0.0.0.1.538
less than 10 years ago25.470.0.2.92628.46
11-20 years ago10.8120.0.0.57011.312
21-30 years ago3.0260.0.0.4703.324
31-40 years ago2.2310.0.0.21002.429
41-50 years ago1.1440.0.0.0.1.144
over 50 years ago1.5380.0.1.2402.627
total45.430.0.5.21950.62
Central Plateaun/a0.4700.0.0.21000.657
less than 10 years ago43.940.0.5.21949.14
11-20 years ago13.4110.0.2.92516.310
21-30 years ago2.0310.0.0.6582.627
31-40 years ago0.4710.0.0.21000.658
41-50 years ago0.4700.0.0.21000.658
over 50 years ago0.4710.21000.4710.944
total60.920.21009.61370.71
Eastern Plateaun/a0.3710.0.0.0.0.371
less than 10 years ago75.730.0.3.92279.63
11-20 years ago19.990.0.1.04520.89
21-30 years ago4.2210.0.0.4714.620
31-40 years ago1.0450.0.0.21001.141
41-50 years ago0.4710.0.0.0.0.471
over 50 years ago1.3380.0.0.0.1.338
total102.810.0.5.519108.21
Western Pre-Alpsn/a1.7360.0.0.4732.132
less than 10 years ago6.5171.6367.51615.510
11-20 years ago4.3211.5365.21911.112
21-30 years ago2.1320.6584.2196.915
31-40 years ago1.3380.21000.9512.429
41-50 years ago1.2450.0.0.9512.133
over 50 years ago1.9340.6572.4295.020
total18.994.52021.6845.03
Central Pre-Alpsn/a2.8270.0.0.8503.623
less than 10 years ago22.692.42923.6848.65
11-20 years ago16.3101.63510.61328.47
21-30 years ago4.4210.4714.8209.714
31-40 years ago1.9330.4711.7353.923
41-50 years ago1.0450.4710.7582.032
over 50 years ago4.8200.4712.3297.415
total53.655.61844.45103.62
Eastern Pre-Alpsn/a1.3410.21000.9502.430
less than 10 years ago16.6101.04512.91230.56
11-20 years ago9.6140.65711.51221.78
21-30 years ago3.2250.9443.3247.416
31-40 years ago0.8500.0.2.4293.325
41-50 years ago1.6350.0.1.7333.424
over 50 years ago2.2300.21002.4294.920
total35.562.92535.2673.52
Northwestern Alpsn/a6.1180.8500.6587.516
less than 10 years ago6.9164.5217.91519.29
11-20 years ago3.2252.6276.61712.412
21-30 years ago2.6271.6353.0257.316
31-40 years ago1.8330.4702.7274.920
41-50 years ago1.4380.8501.7354.022
over 50 years ago4.0220.4713.1247.516
total26.1811.21225.6762.83
Central Alpsn/a3.8230.6571.0445.419
less than 10 years ago4.5192.1293.62210.211
11-20 years ago1.7330.4711.1403.223
21-30 years ago1.6351.2400.8503.522
31-40 years ago0.4710.8490.4711.534
41-50 years ago0.4710.21000.0.0.658
over 50 years ago2.5260.8491.8325.118
total14.996.0168.71329.54
Northeastern Alpsn/a6.1180.31003.3249.714
less than 10 years ago3.0261.8315.31810.112
11-20 years ago2.3281.7353.2247.215
21-30 years ago0.5580.8511.5352.925
31-40 years ago0.6590.7581.4352.726
41-50 years ago0.3700.9500.5581.733
over 50 years ago2.3280.7501.6354.619
total15.2106.81616.9838.93
Southwestern Alpsn/a8.3151.2413.12512.612
less than 10 years ago6.5175.01910.81322.49
11-20 years ago4.8203.9227.31616.010
21-30 years ago4.0223.1258.11515.211
31-40 years ago2.7274.0217.01613.811
41-50 years ago2.0311.6356.61710.213
over 50 years ago7.9165.81813.41227.28
total36.2724.7856.44117.32
Southeastern Alpsn/a16.7111.5383.32421.59
less than 10 years ago18.5104.82020.4943.76
11-20 years ago13.4124.32114.11131.87
21-30 years ago5.6192.5285.81814.011
31-40 years ago4.0222.0325.11911.113
41-50 years ago2.3300.6583.6236.517
over 50 years ago14.6113.7239.11427.38
total75.0419.4961.54155.92
Southern Alpsn/a16.6110.65818.01035.27
less than 10 years ago3.3251.73311.01316.011
11-20 years ago3.5231.53510.41315.511
21-30 years ago2.3301.6359.01412.912
31-40 years ago2.8271.24110.11414.011
41-50 years ago2.8270.65816.41019.89
over 50 years ago10.7136.01840.8657.55
total41.9613.212115.83170.91
Switzerlandn/a67.355.12032.28104.54
less than 10 years ago324.2227.38127.94479.42
11-20 years ago146.4319.11082.55248.13
21-30 years ago50.6613.21245.46109.24
31-40 years ago25.0910.11434.7769.85
41-50 years ago16.2115.12034.1755.46
over 50 years ago58.2619.31081.55159.03
total688.0199.14438.321225.30
© WSL, Swiss National Forest Inventory, 19.06.2020 #853466/319797
NFI2
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: economic region
unit: 1000 ha
unit of evaluation: forest
grid: terrestrial grid NFI2
state1993/95
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/a8.1140.3711.73110.113
less than 10 years ago64.342.12911.21277.64
11-20 years ago27.970.9445.81734.66
21-30 years ago12.1120.3712.42714.810
31-40 years ago2.8250.4711.7314.919
41-50 years ago0.5580.0.1.5332.129
over 50 years ago3.6220.4712.7256.616
total119.324.42027.07150.71
Eastern Juran/a2.4270.0.0.21002.526
less than 10 years ago25.360.0.1.43826.76
11-20 years ago10.4120.0.1.43511.811
21-30 years ago1.5350.0.0.5582.130
31-40 years ago1.8330.0.0.5582.329
41-50 years ago0.7490.0.0.0.0.749
over 50 years ago0.31000.0.0.0.0.3100
total42.530.0.4.12146.52
Western Plateaun/a3.6220.0.0.7504.320
less than 10 years ago24.760.0.2.72527.46
11-20 years ago9.5120.0.0.4709.912
21-30 years ago2.5260.0.0.3702.925
31-40 years ago1.8310.0.0.21002.029
41-50 years ago0.9450.0.0.0.0.945
over 50 years ago1.3380.0.1.0412.327
total44.430.0.5.41749.82
Central Plateaun/a3.5210.0.0.8454.419
less than 10 years ago43.140.0.4.91848.03
11-20 years ago11.7110.0.2.52514.310
21-30 years ago1.7310.0.0.5582.227
31-40 years ago0.4710.0.0.21000.558
41-50 years ago0.3700.0.0.21000.558
over 50 years ago0.3710.21000.3710.844
total61.120.21009.41270.71
Eastern Plateaun/a4.0200.0.0.21004.220
less than 10 years ago74.330.0.3.82178.13
11-20 years ago17.490.0.0.84518.29
21-30 years ago3.6210.0.0.4714.020
31-40 years ago0.9450.0.0.21001.041
41-50 years ago0.3710.0.0.0.0.371
over 50 years ago1.2380.0.0.0.1.238
total101.710.0.5.318107.01
Western Pre-Alpsn/a3.5230.4722.0305.817
less than 10 years ago6.2161.4357.21514.89
11-20 years ago3.9211.4354.81910.012
21-30 years ago1.8320.5583.9196.215
31-40 years ago1.2380.21000.8512.129
41-50 years ago1.0450.0.0.8511.833
over 50 years ago1.7330.6572.2294.420
total19.284.41921.6745.23
Central Pre-Alpsn/a6.5160.5583.62310.613
less than 10 years ago23.282.12923.1848.45
11-20 years ago14.4101.4359.31325.17
21-30 years ago3.9210.4714.2208.514
31-40 years ago1.6330.3711.5353.423
41-50 years ago0.9450.4710.6581.831
over 50 years ago4.3200.3712.1296.715
total54.945.51844.35104.61
Eastern Pre-Alpsn/a4.3200.5583.5228.314
less than 10 years ago15.9101.23813.21130.36
11-20 years ago8.5140.55710.01219.09
21-30 years ago2.8250.8442.9246.516
31-40 years ago0.7500.0.2.1292.925
41-50 years ago1.4350.0.1.5333.024
over 50 years ago1.9300.21002.1294.220
total35.663.22335.4574.22
Northwestern Alpsn/a7.4151.7333.12412.212
less than 10 years ago6.8164.0217.41518.29
11-20 years ago2.9252.3275.91711.112
21-30 years ago2.4271.5352.7266.616
31-40 years ago1.6330.4702.4274.420
41-50 years ago1.3380.7501.5353.522
over 50 years ago3.6230.4712.8256.716
total25.9710.91225.8762.72
Central Alpsn/a5.5181.0401.6328.114
less than 10 years ago4.8172.2273.22210.211
11-20 years ago1.5330.3711.0402.823
21-30 years ago1.3351.0400.7503.023
31-40 years ago0.3710.6490.3711.335
41-50 years ago0.4710.21000.0.0.558
over 50 years ago2.2270.7491.6334.418
total16.096.0158.41230.44
Northeastern Alpsn/a6.3160.8514.02111.012
less than 10 years ago3.6221.6315.71610.911
11-20 years ago2.1291.5352.9246.515
21-30 years ago0.5580.7511.4352.625
31-40 years ago0.6590.6581.2352.426
41-50 years ago0.3700.8510.5581.533
over 50 years ago2.0280.7501.4354.119
total15.3106.61517.2839.13
Southwestern Alpsn/a11.2122.9248.11422.38
less than 10 years ago6.5165.41810.61222.58
11-20 years ago4.2203.5226.51614.210
21-30 years ago3.5222.8257.11513.411
31-40 years ago2.4273.6216.21612.211
41-50 years ago1.8311.4355.9179.013
over 50 years ago6.9165.21811.81224.08
total36.4624.7756.34117.42
Southeastern Alpsn/a21.592.0307.91531.47
less than 10 years ago18.294.91921.0944.25
11-20 years ago12.0123.82112.51128.37
21-30 years ago5.0192.3285.11812.412
31-40 years ago3.6221.8324.5199.913
41-50 years ago2.0300.6583.2235.817
over 50 years ago13.0113.2238.01424.28
total75.2418.6962.44156.22
Southern Alpsn/a19.091.33526.0846.36
less than 10 years ago3.1241.93011.21216.110
11-20 years ago3.1231.5339.31314.011
21-30 years ago2.0301.4358.01411.412
31-40 years ago2.5271.0418.91412.411
41-50 years ago2.5270.55814.51017.69
over 50 years ago9.5135.41836.3651.25
total41.7613.111114.32169.21
Switzerlandn/a106.6411.41263.55181.53
less than 10 years ago319.9226.78126.84473.41
11-20 years ago129.7317.11073.15219.93
21-30 years ago44.8611.61240.1696.64
31-40 years ago22.299.01430.8761.95
41-50 years ago14.4114.52030.2749.16
over 50 years ago51.7617.11072.35141.23
total689.3197.54436.821223.50
© WSL, Swiss National Forest Inventory, 19.06.2020 #853467/319798
NFI1
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: production region
unit: 1000 ha
unit of evaluation: accessible forest without shrub forest NFI1/NFI2/NFI3/NFI4
grid: 1.4 x 1.4 km grid
state1983/85
production region
JuraPlateauPre-AlpsAlpsSouthern Alps Switzerland
avalanches SilvaProtecttime of last treatment (classes of 10 years)1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %
n/an/a1.8330.21000.21000.8500.0.3.026
less than 10 years ago106.63161.7261.7541.773.026374.72
11-20 years ago29.0826.3815.11116.8113.52490.74
21-30 years ago8.5156.1185.51911.8132.23034.18
31-40 years ago2.4291.8335.0208.4152.62820.210
41-50 years ago0.6580.4712.3294.4211.0458.615
over 50 years ago5.4195.2196.91725.697.81550.96
total154.42201.6196.84109.3420.19582.21
inside perimetern/a0.0.0.0.0.0.0.21000.21000.471
less than 10 years ago2.7270.0.5.91819.0101.73329.38
11-20 years ago0.4710.0.3.52312.9122.03218.710
21-30 years ago0.8500.0.1.0459.3141.63512.712
31-40 years ago0.21000.0.0.9455.1200.8507.117
41-50 years ago0.0.0.0.0.0.2.2301.2413.324
over 50 years ago0.6580.0.1.24112.4124.52118.810
total4.7200.0.12.51261.1511.91290.34
outside perimetern/a0.0.0.0.0.0.0.8500.0.0.850
less than 10 years ago15.71113.41254.6553.2614.311151.23
11-20 years ago5.9183.02622.2926.4810.31367.85
21-30 years ago3.3241.4386.11821.9910.51343.27
31-40 years ago2.0320.21003.72315.31116.61037.97
41-50 years ago0.8500.0.1.6336.31811.41320.110
over 50 years ago3.7232.0325.71924.8928.0864.25
total31.4719.91094.04148.7391.13385.12
totaln/a1.8330.21000.21001.8330.21004.222
less than 10 years ago125.13175.12122.23113.8419.010555.21
11-20 years ago35.2729.3840.7656.1615.811177.23
21-30 years ago12.7127.41612.71243.0614.21190.15
31-40 years ago4.6212.0329.71428.8820.0965.15
41-50 years ago1.4380.4713.92212.81213.51232.08
over 50 years ago9.7147.11613.91262.8540.36133.84
total190.51221.51203.31319.11123.121057.51
© WSL, Swiss National Forest Inventory, 19.06.2020 #853468/319799
NFI1
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: production region
unit: 1000 ha
unit of evaluation: accessible forest without shrub forest
grid: 1.4 x 1.4 km grid
state1983/85
production region
JuraPlateauPre-AlpsAlpsSouthern Alps Switzerland
avalanches SilvaProtecttime of last treatment (classes of 10 years)1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %
n/an/a1.8330.21000.21000.8500.0.3.026
less than 10 years ago108.63164.6264.0544.764.222386.22
11-20 years ago29.6827.1815.91118.2103.72394.54
21-30 years ago8.8156.1185.51913.0122.42935.77
31-40 years ago2.4291.8335.0208.7152.62820.610
41-50 years ago0.8500.4712.3294.4211.3389.115
over 50 years ago5.6195.9187.31629.888.81557.56
total157.62206.21100.24119.5423.09606.61
inside perimetern/a0.0.0.0.0.0.0.21000.21000.471
less than 10 years ago2.7270.0.5.91819.4101.73329.78
11-20 years ago0.4710.0.3.72313.3122.03219.410
21-30 years ago0.8500.0.1.0459.5141.63512.912
31-40 years ago0.21000.0.0.9455.1200.8507.117
41-50 years ago0.0.0.0.0.0.2.2301.2413.324
over 50 years ago0.6580.21001.24113.0124.72019.710
total4.7200.210012.71262.7512.11292.44
outside perimetern/a0.0.0.0.0.0.0.8500.0.0.850
less than 10 years ago15.91113.41256.2554.4614.911154.83
11-20 years ago5.9183.02622.7928.0810.71370.35
21-30 years ago3.3241.4386.71722.5910.71344.67
31-40 years ago2.0320.21004.22215.51117.01038.97
41-50 years ago0.8500.0.1.6336.31811.61320.310
over 50 years ago3.9222.2306.11826.8829.6768.65
total31.8720.1997.63154.3394.43398.32
totaln/a1.8330.21000.21001.8330.21004.222
less than 10 years ago127.33178.02126.13118.4320.89570.71
11-20 years ago35.8730.1842.3659.5516.310184.23
21-30 years ago12.9127.41613.31245.0614.61193.24
31-40 years ago4.6212.03210.11429.4820.5966.55
41-50 years ago1.6350.4713.92212.81214.11132.78
over 50 years ago10.1148.31514.71169.6543.16145.83
total194.11226.51210.61336.51129.521097.31
© WSL, Swiss National Forest Inventory, 19.06.2020 #853469/319800
NFI1
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: production region
unit: 1000 ha
unit of evaluation: accessible forest without shrub forest
grid: terrestrial grid NFI1
state1983/85
production region
JuraPlateauPre-AlpsAlpsSouthern Alps Switzerland
avalanches SilvaProtecttime of last treatment (classes of 10 years)1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %
n/an/a1.8230.5450.2710.8350.0.3.417
less than 10 years ago111.92164.0164.4346.244.016390.61
11-20 years ago30.2527.9616.2819.473.41797.23
21-30 years ago7.6115.6135.61311.192.42032.36
31-40 years ago3.4171.9233.9168.9113.01821.17
41-50 years ago0.9330.6411.6254.4150.8358.311
over 50 years ago7.6115.5138.21132.659.01062.94
total163.51206.01100.13123.5222.66615.71
inside perimetern/a0.0.0.0.0.2710.3580.11000.641
less than 10 years ago2.1220.11005.91322.072.02232.15
11-20 years ago0.8350.0.2.91812.792.42018.97
21-30 years ago0.6410.0.1.3289.9101.82313.69
31-40 years ago0.11000.0.0.9335.7131.8238.511
41-50 years ago0.0.0.0.0.0.3.2181.8235.014
over 50 years ago0.4500.11000.93312.994.61518.97
total4.1160.27112.1966.7414.5897.63
outside perimetern/a0.0.0.11000.3580.8350.0.1.229
less than 10 years ago15.5813.0856.9453.0414.58153.02
11-20 years ago5.4133.31721.0726.2610.21066.04
21-30 years ago2.8191.3288.21120.4711.6944.35
31-40 years ago1.9230.6414.51515.1817.1739.25
41-50 years ago0.5450.0.1.7235.91310.6918.77
over 50 years ago3.3171.6257.11225.9630.4568.34
total29.6519.8799.82147.3294.32390.81
totaln/a1.8230.6410.7381.9230.11005.214
less than 10 years ago129.62177.11127.32121.3220.57575.71
11-20 years ago36.5531.2540.1558.3416.08182.12
21-30 years ago11.096.91215.1841.4515.8890.23
31-40 years ago5.4142.5209.31029.7621.8668.74
41-50 years ago1.4270.6413.31713.5913.2832.05
over 50 years ago11.397.21216.2871.4344.04150.12
total197.11226.11212.01337.51131.411104.00
© WSL, Swiss National Forest Inventory, 19.06.2020 #853470/319801
NFI1
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: production region
unit: 1000 ha
unit of evaluation: forest
grid: 1.4 x 1.4 km grid
state1983/85
production region
JuraPlateauPre-AlpsAlpsSouthern Alps Switzerland
avalanches SilvaProtecttime of last treatment (classes of 10 years)1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %
n/an/a2.2300.6583.22528.3814.21148.66
less than 10 years ago108.63164.8264.2545.564.222387.32
11-20 years ago29.8827.1816.11118.6103.92395.54
21-30 years ago8.8156.2185.81813.4122.42936.57
31-40 years ago2.6281.8335.0209.3142.62821.410
41-50 years ago0.8500.4712.3294.4211.6359.414
over 50 years ago5.6196.3188.31533.4710.01463.75
total158.42207.31104.93152.9338.87662.31
inside perimetern/a0.0.0.0.0.21003.0261.2414.321
less than 10 years ago2.7270.0.5.91819.8101.73330.18
11-20 years ago0.4710.0.3.72313.3122.03219.410
21-30 years ago0.8500.0.1.0459.9141.63513.312
31-40 years ago0.21000.0.1.2415.1200.8507.316
41-50 years ago0.0.0.0.0.0.2.2301.2413.324
over 50 years ago0.6580.21001.43813.6124.72020.510
total4.7200.210013.31266.9513.11298.24
outside perimetern/a0.21000.0.0.4716.51713.31220.410
less than 10 years ago15.91113.41256.2554.4614.911154.83
11-20 years ago5.9183.02622.7928.4810.71370.75
21-30 years ago3.3241.4386.71722.7910.91345.06
31-40 years ago2.0320.21004.22216.71117.61040.77
41-50 years ago0.8500.0.1.8316.51711.81320.99
over 50 years ago3.9222.4297.01729.0831.4773.65
total32.0720.3999.13164.33110.53426.12
totaln/a2.4290.6583.82337.8728.6873.35
less than 10 years ago127.33178.22126.33119.6320.89572.31
11-20 years ago36.0730.1842.5660.3516.510185.63
21-30 years ago12.9127.61613.51246.0614.81194.84
31-40 years ago4.8202.03210.31431.2821.1969.35
41-50 years ago1.6350.4714.12113.01214.51133.67
over 50 years ago10.1148.91516.71176.0546.06157.83
total195.11227.81217.31384.01162.321186.61
© WSL, Swiss National Forest Inventory, 19.06.2020 #853471/319802
NFI1
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: production region
unit: 1000 ha
unit of evaluation: forest
grid: terrestrial grid NFI1
state1983/85
production region
JuraPlateauPre-AlpsAlpsSouthern Alps Switzerland
avalanches SilvaProtecttime of last treatment (classes of 10 years)1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %
n/an/a2.1220.7382.22127.8613.9846.85
less than 10 years ago111.92164.3164.6346.944.016391.81
11-20 years ago30.3528.0616.4819.773.51798.03
21-30 years ago7.6115.7135.81311.492.42032.95
31-40 years ago3.5171.9233.9169.3103.31721.97
41-50 years ago0.9330.6411.6254.4151.0328.511
over 50 years ago7.7115.7139.11036.5510.41069.44
total164.11206.91103.62156.0238.55669.21
inside perimetern/a0.11000.0.0.4502.8191.1304.415
less than 10 years ago2.1220.11005.91322.272.02232.35
11-20 years ago0.8350.0.2.91812.792.42018.97
21-30 years ago0.6410.0.1.32810.2101.82313.98
31-40 years ago0.11000.0.1.0325.9131.8238.811
41-50 years ago0.0.0.0.0.0.3.3181.8235.114
over 50 years ago0.4500.11001.22913.594.61519.87
total4.2160.27112.7970.6315.58103.13
outside perimetern/a0.2710.11000.6417.11212.9920.97
less than 10 years ago15.7813.1857.0453.6414.68153.92
11-20 years ago5.4133.41721.2726.6610.3966.84
21-30 years ago2.8191.3288.31120.8711.7944.95
31-40 years ago1.9230.6414.61515.9817.7740.75
41-50 years ago0.5450.0.1.8236.11310.9919.37
over 50 years ago3.3171.7247.61128.5632.4573.63
total29.9520.17101.22158.52110.52420.11
totaln/a2.4200.8353.21837.7527.9672.14
less than 10 years ago129.72177.51127.62122.7220.67578.01
11-20 years ago36.6531.4540.5559.0416.27183.72
21-30 years ago11.097.01215.4842.4515.9891.63
31-40 years ago5.5132.5209.51031.1522.7671.44
41-50 years ago1.4270.6413.41713.8813.7832.95
over 50 years ago11.497.51117.9778.5347.44162.72
total198.11227.31217.51385.11164.411192.40
© WSL, Swiss National Forest Inventory, 19.06.2020 #853472/319803
NFI2
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: production region
unit: 1000 ha
unit of evaluation: accessible forest without shrub forest NFI1/NFI2/NFI3/NFI4
grid: 1.4 x 1.4 km grid
state1993/95
production region
JuraPlateauPre-AlpsAlpsSouthern Alps Switzerland
avalanches SilvaProtecttime of last treatment (classes of 10 years)1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %
n/an/a0.0.0.0.0.0.0.4710.21000.658
less than 10 years ago87.34142.5244.4635.472.927312.52
11-20 years ago42.3642.7628.9822.792.032138.64
21-30 years ago15.0118.7158.81512.1131.93346.46
31-40 years ago4.8203.1253.5247.9162.42921.710
41-50 years ago1.4381.8333.6235.2202.23014.212
over 50 years ago3.6232.8277.51625.698.61548.16
total154.42201.6196.84109.3420.19582.21
inside perimetern/a0.0.0.0.0.0.0.0.0.0.0.0.
less than 10 years ago2.5290.0.4.92017.7101.63526.78
11-20 years ago1.0440.0.3.72312.0131.53518.310
21-30 years ago0.4710.0.1.9328.8151.63512.812
31-40 years ago0.4710.0.0.6587.6161.2419.714
41-50 years ago0.0.0.0.0.4713.9220.6584.920
over 50 years ago0.4710.0.1.04411.0135.41917.910
total4.7200.0.12.51261.1511.91290.34
outside perimetern/a0.0.0.0.0.0.0.4710.0.0.471
less than 10 years ago12.61212.01241.8645.269.614121.34
11-20 years ago8.3154.32126.6830.1810.01479.45
21-30 years ago3.3241.43812.11218.4108.91444.17
31-40 years ago2.5280.6584.52115.9119.91433.48
41-50 years ago1.8330.21002.82712.21315.41132.48
over 50 years ago2.9261.4386.21826.5837.3674.25
total31.4719.91094.04148.7391.13385.12
totaln/a0.0.0.0.0.0.0.8500.21001.045
less than 10 years ago102.43154.6291.1498.4414.011460.52
11-20 years ago51.6547.1659.2564.9513.512236.33
21-30 years ago18.71010.11422.9939.3712.312103.24
31-40 years ago7.7163.7238.61531.3813.41264.85
41-50 years ago3.2252.0326.81721.3918.31051.56
over 50 years ago7.0174.22214.71163.1551.35140.23
total190.51221.51203.31319.11123.121057.51
© WSL, Swiss National Forest Inventory, 19.06.2020 #853473/319804
NFI2
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: production region
unit: 1000 ha
unit of evaluation: forest
grid: 1.4 x 1.4 km grid
state1993/95
production region
JuraPlateauPre-AlpsAlpsSouthern Alps Switzerland
avalanches SilvaProtecttime of last treatment (classes of 10 years)1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %
n/an/a1.8332.1305.71941.0716.61167.25
less than 10 years ago90.24145.7246.2639.173.325324.42
11-20 years ago43.2643.9630.4825.693.523146.53
21-30 years ago15.4118.8159.61414.3122.33050.46
31-40 years ago5.0203.3243.9229.5142.82724.59
41-50 years ago1.4381.8333.6236.4182.82716.011
over 50 years ago4.3223.2259.01531.3810.71358.46
total161.22208.81108.43167.0341.96687.31
inside perimetern/a0.0.0.0.0.21004.2220.6584.920
less than 10 years ago2.5290.0.4.92018.3101.73327.58
11-20 years ago1.0440.0.3.72312.8121.53519.110
21-30 years ago0.4710.0.1.9329.2141.63513.212
31-40 years ago0.4710.0.0.6588.0161.24110.114
41-50 years ago0.0.0.0.0.4713.9220.6584.920
over 50 years ago0.4710.21001.24111.6136.01819.510
total4.7200.210012.91268.1513.21299.24
outside perimetern/a0.4710.21002.13211.31318.01032.08
less than 10 years ago13.01212.01243.9648.0611.013127.94
11-20 years ago8.3154.32127.2832.3710.41382.65
21-30 years ago3.3241.43812.71219.4109.01445.86
31-40 years ago2.5280.6584.92016.71110.11434.87
41-50 years ago1.8330.21003.22512.41216.41033.97
over 50 years ago3.1251.6357.21629.3840.8682.05
total32.4720.39101.13169.43115.83439.02
totaln/a2.2302.3298.01656.5635.27104.24
less than 10 years ago105.63157.7295.04105.4416.011479.72
11-20 years ago52.5548.3661.3570.7515.511248.23
21-30 years ago19.11010.31424.2942.9612.912109.44
31-40 years ago7.9163.9229.41434.1714.01169.35
41-50 years ago3.2252.0327.21722.7919.8954.96
over 50 years ago7.8164.92017.41072.1557.55159.83
total198.31229.41222.41404.51170.911225.50
© WSL, Swiss National Forest Inventory, 19.06.2020 #853474/319805
NFI2
forest area
avalanches SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: production region
unit: 1000 ha
unit of evaluation: accessible forest without shrub forest
grid: 1.4 x 1.4 km grid
state1993/95
production region
JuraPlateauPre-AlpsAlpsSouthern Alps Switzerland
avalanches SilvaProtecttime of last treatment (classes of 10 years)1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %
n/an/a1.0451.2410.8503.8230.21007.017
less than 10 years ago90.24145.7246.0639.173.325324.22
11-20 years ago43.2643.9630.4825.693.523146.53
21-30 years ago15.4118.8159.61414.3122.33050.46
31-40 years ago5.0203.3243.9229.5142.82724.59
41-50 years ago1.4381.8333.6236.4182.82716.011
over 50 years ago4.3223.2259.01531.1810.71358.26
total160.32207.91103.33129.6325.68626.71
inside perimetern/a0.0.0.0.0.0.0.0.0.0.0.0.
less than 10 years ago2.5290.0.4.92018.3101.73327.58
11-20 years ago1.0440.0.3.72312.8121.53519.110
21-30 years ago0.4710.0.1.9329.2141.63513.212
31-40 years ago0.4710.0.0.6588.0161.24110.114
41-50 years ago0.0.0.0.0.4713.9220.6584.920
over 50 years ago0.4710.0.1.24111.4136.01819.110
total4.7200.0.12.71263.7512.71293.84
outside perimetern/a0.21000.0.0.0.2.0321.0453.225
less than 10 years ago13.01212.01243.7647.8611.013127.54
11-20 years ago8.3154.32127.2832.3710.41382.65
21-30 years ago3.3241.43812.71219.4109.01445.86
31-40 years ago2.5280.6584.92016.71110.11434.87
41-50 years ago1.8330.21003.22512.41216.21033.87
over 50 years ago3.1251.6357.21629.0840.6681.55
total32.2720.1998.83159.7398.33409.22
totaln/a1.2411.2410.8505.8181.24110.214
less than 10 years ago105.63157.7294.64105.3416.011479.12
11-20 years ago52.5548.3661.3570.7515.511248.23
21-30 years ago19.11010.31424.2942.9612.912109.44
31-40 years ago7.9163.9229.41434.1714.01169.35
41-50 years ago3.2252.0327.21722.7919.6954.76
over 50 years ago7.8164.72017.41071.5557.35158.83
total197.31228.01214.81353.11136.621129.71
© WSL, Swiss National Forest Inventory, 19.06.2020 #853475/319806
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