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NFI4
forest area
rockfall SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: canton
unit: 1000 ha
unit of evaluation: accessible forest without shrub forest NFI3/NFI4
grid: 1.4 x 1.4 km grid
state2009/17
rockfall SilvaProtect
n/ainside perimeteroutside perimetertotal
cantontime of last treatment (classes of 10 years)1000 ha± %1000 ha± %1000 ha± %1000 ha± %
AGn/a0.21000.0.0.0.0.2100
less than 10 years ago35.140.0.1.04536.14
11-20 years ago6.4170.0.0.21006.616
21-30 years ago1.8330.0.0.0.1.833
31-40 years ago0.4700.0.0.0.0.470
41-50 years ago0.8500.0.0.21001.044
over 50 years ago1.0440.0.0.4701.437
total45.720.0.1.83347.52
AIn/a0.0.0.0.0.0.0.0.
less than 10 years ago0.21000.0.0.8480.942
11-20 years ago0.9440.0.0.9421.928
21-30 years ago0.0.0.0.0.21000.2100
31-40 years ago0.8450.0.0.21001.041
41-50 years ago0.21000.0.0.4720.657
over 50 years ago0.4700.0.0.4720.850
total2.5240.0.2.8205.310
ARn/a0.0.0.0.0.0.0.0.
less than 10 years ago2.4280.0.0.9453.222
11-20 years ago1.6310.0.0.9442.523
21-30 years ago0.6480.0.0.7491.333
31-40 years ago0.4730.0.0.3690.750
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.31000.0.0.21000.473
total5.3130.0.2.8208.16
BEn/a0.0.0.0.0.0.0.0.
less than 10 years ago52.651.43834.9789.03
11-20 years ago14.6110.85015.41130.77
21-30 years ago6.5171.2418.61516.311
31-40 years ago4.7210.21004.8209.714
41-50 years ago2.9260.21003.6236.717
over 50 years ago8.0160.8507.61616.511
total89.344.62175.04168.91
BL/BSn/a0.0.0.0.0.0.0.0.
less than 10 years ago9.0120.31001.24010.511
11-20 years ago3.7220.0.1.4405.019
21-30 years ago1.3400.0.0.4701.735
31-40 years ago1.1440.0.0.4711.537
41-50 years ago0.21000.21000.0.0.470
over 50 years ago1.0480.0.0.21001.343
total16.360.5723.62220.43
FRn/a0.0.0.0.0.0.0.0.
less than 10 years ago15.790.0.7.11522.87
11-20 years ago5.6180.0.2.2307.815
21-30 years ago1.8330.0.0.7492.627
31-40 years ago1.5380.0.1.6333.124
41-50 years ago0.6590.0.1.1401.733
over 50 years ago1.7350.0.1.7363.325
total27.050.0.14.4941.43
GEn/a0.0.0.0.0.0.0.0.
less than 10 years ago2.7190.0.0.0.2.719
11-20 years ago0.0.0.0.0.0.0.0.
21-30 years ago1.0570.0.0.0.1.057
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.0.0.0.0.0.0.0.
total3.750.0.0.0.3.75
GLn/a0.0.0.0.0.0.0.0.
less than 10 years ago1.5350.6572.1294.219
11-20 years ago1.2410.7481.2403.124
21-30 years ago1.0440.4710.9442.328
31-40 years ago0.7480.21000.6571.533
41-50 years ago0.4710.0.0.5690.949
over 50 years ago1.2410.4711.7323.323
total6.0162.3276.91415.26
GRn/a0.0.0.0.0.0.0.0.
less than 10 years ago15.7110.85019.21035.77
11-20 years ago12.3120.65817.41030.27
21-30 years ago9.2150.65814.41124.29
31-40 years ago7.9161.04510.41319.310
41-50 years ago4.4210.6586.61711.613
over 50 years ago20.493.02627.1850.56
total69.856.51795.23171.52
JUn/a0.0.0.0.0.0.0.0.
less than 10 years ago12.6100.4714.71917.77
11-20 years ago4.3210.4702.4287.015
21-30 years ago2.1290.21000.8503.124
31-40 years ago1.6350.0.0.9422.527
41-50 years ago0.6580.0.0.4701.045
over 50 years ago0.8500.21001.1402.129
total21.961.24010.31233.43
LUn/a0.0.0.0.0.0.0.0.
less than 10 years ago20.570.0.2.72623.27
11-20 years ago7.3150.0.2.92610.212
21-30 years ago1.2400.0.0.8492.031
31-40 years ago1.4380.0.0.6582.031
41-50 years ago1.0450.0.0.21001.340
over 50 years ago1.3410.0.0.4711.735
total32.840.0.7.61540.42
NEn/a0.0.0.0.0.0.0.0.
less than 10 years ago18.570.21003.12321.95
11-20 years ago3.1240.0.0.0.3.124
21-30 years ago1.0400.0.0.21001.237
31-40 years ago1.0450.0.0.0.1.045
41-50 years ago0.21000.0.0.0.0.2100
over 50 years ago0.31000.0.0.3710.660
total24.150.21003.62128.03
NWn/a0.0.0.0.0.0.0.0.
less than 10 years ago1.8340.0.1.2422.925
11-20 years ago1.0490.0.1.5372.528
21-30 years ago0.8560.0.0.4721.243
31-40 years ago0.0.0.0.0.31000.3100
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.7570.21000.4721.340
total4.3180.21003.8208.27
OWn/a0.0.0.0.0.0.0.0.
less than 10 years ago1.9290.21004.7186.813
11-20 years ago3.4230.0.1.0454.420
21-30 years ago1.1420.0.0.21001.338
31-40 years ago0.5580.0.0.0.0.558
41-50 years ago1.1440.0.0.5601.635
over 50 years ago1.9330.11002.5284.520
total9.9110.3728.81119.04
SGn/a0.0.0.0.0.0.0.0.
less than 10 years ago11.2121.04510.81223.08
11-20 years ago4.5210.0.7.31611.912
21-30 years ago2.2300.0.2.8264.919
31-40 years ago1.0450.21002.2303.424
41-50 years ago0.6570.0.2.0332.629
over 50 years ago2.9260.21004.3227.516
total22.481.53829.4653.33
SHn/a0.0.0.0.0.0.0.0.
less than 10 years ago5.9140.0.0.21006.114
11-20 years ago4.0190.0.0.21004.219
21-30 years ago1.6330.0.0.0.1.633
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.21000.0.0.0.0.2100
over 50 years ago0.21000.0.0.0.0.2100
total11.940.0.0.46912.33
SOn/a0.0.0.0.0.0.0.0.
less than 10 years ago18.170.5700.94519.67
11-20 years ago6.2160.0.0.4726.616
21-30 years ago1.3380.0.0.0.1.338
31-40 years ago1.2410.0.0.21001.338
41-50 years ago1.1450.0.0.21001.241
over 50 years ago1.2410.4720.5702.131
total29.030.9502.13032.12
SZn/a0.0.0.0.0.0.0.0.
less than 10 years ago4.9190.0.5.51810.412
11-20 years ago3.4230.4693.1246.915
21-30 years ago1.4370.21001.1412.826
31-40 years ago1.0450.0.0.8501.733
41-50 years ago1.0450.0.1.0451.931
over 50 years ago3.6230.0.1.2414.720
total15.390.75612.61028.54
TGn/a0.0.0.0.0.0.0.0.
less than 10 years ago13.470.0.0.94114.26
11-20 years ago2.7250.0.0.5593.222
21-30 years ago1.0440.0.1.0442.029
31-40 years ago0.7560.0.0.0.0.756
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.0.0.0.0.0.0.0.
total17.740.0.2.42620.12
TIn/a0.0.0.0.0.0.0.0.
less than 10 years ago4.0221.0459.41414.411
11-20 years ago2.6280.5715.3198.415
21-30 years ago2.3290.21006.8179.314
31-40 years ago3.3240.21006.51710.014
41-50 years ago2.2301.0448.01511.213
over 50 years ago11.2135.21951.7568.14
total25.688.01587.73121.32
URn/a0.0.0.0.0.0.0.0.
less than 10 years ago1.5341.8321.7325.017
11-20 years ago1.1400.0.1.5322.624
21-30 years ago1.3400.21001.0442.527
31-40 years ago0.4710.4710.6571.437
41-50 years ago0.5560.4690.0.0.944
over 50 years ago2.0310.21001.3393.423
total6.8153.0246.01415.86
VDn/a0.21000.0.0.0.0.2100
less than 10 years ago39.160.0.7.81546.95
11-20 years ago14.4110.0.3.72318.110
21-30 years ago7.4160.0.3.62311.013
31-40 years ago4.4210.0.1.3385.718
41-50 years ago4.5200.0.1.3385.818
over 50 years ago4.7200.6582.4287.715
total74.730.65820.2995.62
VSn/a0.0.0.0.0.0.0.0.
less than 10 years ago7.3162.13016.11025.58
11-20 years ago4.0220.65810.01314.511
21-30 years ago2.2300.21007.4169.714
31-40 years ago3.6230.8505.1199.614
41-50 years ago3.0260.6586.41710.114
over 50 years ago14.2112.82727.5744.56
total34.377.01672.53113.82
ZGn/a0.0.0.0.0.0.0.0.
less than 10 years ago2.6220.0.2.3214.910
11-20 years ago0.21000.0.0.11000.472
21-30 years ago0.21000.0.0.0.0.2100
31-40 years ago0.0.0.0.0.0.0.0.
41-50 years ago0.0.0.0.0.0.0.0.
over 50 years ago0.21000.0.0.0.0.2100
total3.3170.0.2.5205.76
ZHn/a0.0.0.0.0.0.0.0.
less than 10 years ago34.350.0.1.34035.64
11-20 years ago8.2150.0.0.21008.414
21-30 years ago3.1250.0.0.0.3.125
31-40 years ago1.3400.0.0.0.1.340
41-50 years ago0.4710.0.0.0.0.471
over 50 years ago0.4700.0.0.21000.658
total47.820.0.1.63549.42
Switzerlandn/a0.4710.0.0.0.0.471
less than 10 years ago332.3210.414140.63483.32
11-20 years ago116.744.02279.55200.23
21-30 years ago53.663.22551.86108.64
31-40 years ago38.872.92636.8778.65
41-50 years ago25.992.92632.4861.26
over 50 years ago79.6514.112133.03226.73
total647.4137.57474.211159.11
© WSL, Swiss National Forest Inventory, 18.06.2020 #861153/327484
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