The utility of fused airborne laser scanning and multispectral data for improved wind damage risk assessment over a managed forest landscape in Finland

Table 3 Test of significant difference between damaged and non-damaged points, for various wind directions

	N	NE	E	SE	S	SW	W	NW
Distance to edge	0.2453	0.4187	0.6010	0.6662	0.1482	0.8891	0.9931	0.0642
Vegetation height in upwind gap	0.0365	0.5948	0.0801	0.0251	0.5119	0.2207	0.5737	0.9004
Upwind gap size	0.9288	0.6370	0.0828	0.0801	0.2393	0.6831	0.6822	0.9270
Critical wind speed	0.0874	0.0834	0.5362	0.5525	0.3646	0.0210	0.0294	0.0015
Th. met. wind speed	0.9791	0.7783	0.8698	0.8380	0.3367	0.2247	0.1718	0.0463
Th. met. wind speed (topography only)	0.5376	0.7533	0.8694	0.5787	0.3359	0.1619	0.2332	0.0485
Th. met. wind speed (roughness only)	0.5305	0.6074	0.6341	0.4425	0.2476	0.1319	0.1172	0.0065

Here, ‘Th. met. wind speed’ stands for ‘threshold meteorological wind speed’. Values that are significant at the 0.05 level are highlighted (bold). These values indicate the significance of the difference: for example, the value of 0.2453 in the first column is associated with the distance to edge of damaged versus background points (the two groups), considering a northerly wind. Hence, this high p value implies that the difference in the distances to the south edge is not significant

ISSN: 1297-966X