Help with making crown fire hazard assessments
Document Type: Conference Proceedings
Author(s): Martin E. Alexander
Compiler(s): William C. Fischer; Stephen F. Arno
Publication Year: 1988

Cataloging Information

  • conifer forests
  • crown fire
  • hazard mitigation
  • rate of spread
Record Maintained By:
Record Last Modified: November 5, 2019
FRAMES Record Number: 1969


This paper offers some suggestions and field guides with respect to the operational application of C.E. Van Wagner's (1997, Can. J. For. Res. 7:23-34) theory to calculate the threshold conditions for the start and spread of crown fires in conifer forests. Three categories of crowning are recognized (passive, active, and independent); they are determined by three crown fuel properties (live crown base height, foliar moisture content, and bulk density) and two characteristics of fire behavior (spread rate and surface intensity).

[This publication is referenced in the "Synthesis of knowledge of extreme fire behavior: volume I for fire managers" (Werth et al 2011).]

Online Link(s):
Link to this document (654 KB; pdf)
Alexander, M. E. 1988. Help with making crown fire hazard assessments. Pages 147-156 in Fischer, W. C.; Arno, S. F. (compilers). Protecting People and Homes from Wildfire in the Interior West: Proceedings of the Symposium and Workshop. General Technical Report GTR-INT-251. Ogden, UT: USDA Forest Service, Intermountain Research Station.