The FlamMap fire modeling system (Finney 2006) is used to project crown fire
behavior under constant, non-extreme fire weather conditions for every pixel across the project area, and these fire behavior estimates are used to infer areas of high burn severity.
Large trees are generally only killed by crown fires
(Bryant et al.
Seventy-two percent of the acres receiving the treatments prescribed under the comprehensive approach remained in the low-hazard category for crown fire
30 years later.
At present, fuel loads are so high that introducing fire on a broad scale is likely to result in many stand-replacing crown fires
Nearly three-fourths of the acres receiving the treatments prescribed under the comprehensive approach remained in the low-hazard category for crown fire
30 years later (Table 1).
We had all thought that when the crown fire
got to an area that had been prescribed-burned, it would drop to the ground," he recalls.
Closets to Go, Crown Fire
Systems, Floor Factors, Hughes Electrical Contractors, Hunter-Davisson, Inc.
Figure 2 shows that 8 years and more after fuel reduction, the treatments are still projected by fire models to greatly reduce the chance of a crown fire
compared to untreated forest.
Open-grown fir branches become fuel ladders that can feed a dangerous crown fire
Vegetation dynamics and exotic plant invasion following high severity crown fire
in a southern California conifer forest.
Fallen oaks and pines with leaves and needles still attached make for excellent "ladder" fuel, which spreads fire up to treetops - what firefighters call a crown fire
, Chief Durgin said.
Most homes are ignited by flying embers thrown as far as a mile and a half ahead of a crown fire
, or ignite when the ground fire reaches brush and trees within 100 feet of the buildings.
The lawsuit, filed on behalf of the California Department of Forestry and Fire Protection, alleges that the nearly 12,000-acre Crown Fire
was caused by a lawn mower operated by a caretaker on Alex Klaus' property on Arrastre Canyon Road.
The exception may be a wind-blown crown fire
, spreading rapidly through the upper reaches of the trees and jumping firebreaks.
Linking Acton and the Angeles National Forest, Aliso Canyon Road has been blocked since July 2004, when the 11,400-acre Crown Fire
burned across 12 miles of brush-covered hillside from Acton to the Littlerock Reservoir.