Table 5 Linear mixed models predicting the rate of surface fire spread and flame length as a function of windspeed (50th, 80th, 90th, or 97th percentile), woodland phase, fuel treatment (prescribed fire, mechanical, or untreated control), and year (years 0, 1, 2, 3, 6, and 10 post-treatment) from ten replicate sites across the Intermountain West, USA.

Intercept

48.4

< 0.001

170.5

< 0.001

Year

78.0

< 0.001

355.7

< 0.001

Treatment

431.0

< 0.001

1655.1

< 0.001

Phase

9.3

< 0.001

96.1

< 0.001

Windspeed

118.9

< 0.001

253.8

< 0.001

Year × treatment

25.0

< 0.001

89.6

< 0.001

Year × phase

3.7

< 0.001

2.0

0.30

Treatment × phase

24.3

< 0.001

2.8

0.03

Treatment × windspeed

26.3

< 0.001

26.3

< 0.001

Year × windspeed

4.8

< 0.001

5.7

< 0.001

Phase × windspeed

0.5

0.79

1.3

0.23

Treatment × year × wind

1.6

0.03

1.4

0.06

Year × phase × wind

0.2

1.00

0.04

1.00

Treatment × phase × wind

1.5

0.12

0.04

1.00