From: Modeling fuel break effectiveness in southern Spain wildfires
Variables | B | SE | Odds ratio Exp(B) |
---|---|---|---|
Fire front length (L) | |||
< 50 m | − 1,056 | 1,136 | 0,348 |
50–100 m | − 1,782 | 1,092 | 0,168 |
100–250 m | − 1,781 | 1,081 | 0,168 |
250–400 m | − 3,114 | 1,145 | 0,044 |
400–600 m | − 2,939 | 1,211 | 0,053 |
600–800 m | − 2,324 | 1,247 | 0,098 |
800–1000 m | − 3,385 | 1,179 | 0,034 |
> 1000 m | |||
Fuel break type (PIT) | |||
Vegetation-free | 3,192 | 1,174 | 24,330 |
Combination of vegetation-free and vegetated | 2,530 | 1,004 | 12,556 |
Vegetated | |||
Fuel break location (LOC) | |||
Steepest slope | 0,887 | 0,721 | 2,429 |
Flat | 1,411 | 0,718 | 4,101 |
Ridgeline | 1,397 | 0,991 | 4,042 |
Lower slope | 0,318 | 0,711 | 1,375 |
Mid-slope | 1,320 | 0,919 | 3,745 |
Canyon bottom | |||
Fuel break width (W) | 0,017 | 0,005 | 1,017 |
Intersection angle between fire and fuel break (ANG) | |||
Almost parallel | − 1,202 | 0,545 | 0,301 |
Lateral | − 2,127 | 0,504 | 0,119 |
Perpendicular | |||
Type of suppression work executed on fuel break (SW) | |||
Combined ground-aerial firefighting | 0,292 | 0,523 | 1,339 |
Ground firefighting | − 2,305 | 0,404 | 0,100 |
Aerial firefighting | − 3,479 | 0,485 | 0,031 |
Fire spread with no suppression due to technical reasons | − 21,396 | 4201,908 | 0,000 |
Fire spread with no suppression due to safety reasons | |||
Flame length (FL) | − 0,536 | 0,104 | 0,585 |
Constant (b0) | 5,226 | 1,302 | 186,125 |