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NFI4b

forest area: rockfall SilvaProtect, modelled and assigned · degree of cover (aerial photo, 5 classes) · biogeographical region
unit: 1000 ha
unit of evaluation: accessible forest excluding shrub forest NFI3/NFI4 combined
grid:
state 2009/13
biogeographical region
JuraPlateauNorthern AlpsWestern Central-AlpsEastern Central-AlpsSouthern AlpsSwitzerland
rockfall SilvaProtect, modelled and assigneddegree of cover (aerial photo, 5 classes)1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %
inside perimeter0-20%....0.4100....0.41000.771
21-40%0.4100..0.41000.771..0.41001.845
41-60%....0.7712.4371.1581.4505.625
61-80%0.7710.41003.5313.4310.7712.14110.918
over 80%2.2410.41009.2191.7441.1587.52122.013
total3.2330.77114.2168.2202.83511.81741.09
outside perimeter0-20%2.9352.8354.3291.0581.4501.74514.116
21-40%2.9354.62817.8147.52114.1157.12254.18
41-60%15.91512.71658.0728.41038.0822.112175.24
61-80%47.6853.07107.5529.8941.3838.79317.93
over 80%121.44183.23143.1422.61118.31368.66557.12
total190.61256.41330.7189.43113.13138.231118.41
total0-20%2.9352.8354.6281.0581.4502.14114.915
21-40%3.3334.62818.2148.32014.1157.42255.88
41-60%15.91512.71658.8730.8939.1823.512180.84
61-80%48.3853.47111.0533.2942.0840.88328.83
over 80%123.53183.63152.3424.31119.31376.15579.12
total193.81257.11344.9197.63115.92150.021159.41

calculated by unit of reference: biogeographical region

© WSL, Swiss National Forest Inventory, 03.11.2014 #165000/151382
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