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NFI4b

forest area: rockfall SilvaProtect, modelled and assigned · time of last treatment (classes of 10 years) · protection forest region
unit: 1000 ha
unit of evaluation: accessible forest excluding shrub forest
grid:
state 2009/13
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern AlpsSwitzerland
rockfall SilvaProtect, modelled and assignedtime of last treatment (classes of 10 years)1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %
inside perimeterless than 10 years ago1.8451.8452.8352.1411.1581.45010.918
11-20 years ago0.7710.41002.1411.0580.41001.1585.625
21-30 years ago..1.8451.058..0.7710.41003.930
31-40 years ago..0.41001.0580.31000.41000.7712.835
41-50 years ago....0.31001.0580.41000.7712.538
over 50 years ago1.1582.2411.4503.8301.1587.42116.914
total3.6326.5238.6198.2203.93011.71742.59
outside perimeterless than 10 years ago281.9281.9548.3722.71132.8913.815481.32
11-20 years ago80.9645.8827.91015.11427.8109.918207.44
21-30 years ago29.71123.11215.01510.71724.61113.716116.85
31-40 years ago15.71514.1169.5197.92016.11411.91775.27
41-50 years ago9.71912.6166.62210.3189.1199.11957.48
over 50 years ago12.51725.21120.61239.5834.7983.55216.03
total430.41202.72127.83106.23145.02142.131154.11
totalless than 10 years ago283.7283.7551.1724.71133.8915.315492.22
11-20 years ago81.6646.2830.01016.21428.11011.017213.04
21-30 years ago29.71124.91216.01410.71725.31114.115120.75
31-40 years ago15.71514.41510.5188.32016.51412.61678.07
41-50 years ago9.71912.6166.92211.4179.4199.81859.87
over 50 years ago13.61627.41122.01243.2735.8991.05232.93
total434.01209.22136.52114.43148.92153.821196.71

calculated by unit of reference: protection forest region

© WSL, Swiss National Forest Inventory, 03.11.2014 #162030/148409
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