Document


Title

Using the effective heating number as a weighting factor in Rothermel's fire spread model
Document Type: Report
Author(s): William H. Frandsen
Publication Year: 1973

Cataloging Information

Keyword(s):
  • effective heating number
  • fire spread model
  • ignitibility
  • mathematical models
  • Rothermel model
  • weighting parameter
Topic(s):
Record Maintained By:
Record Last Modified: December 13, 2016
FRAMES Record Number: 13851

Description

An inconsistency arises in Rothermel's fire spread model when there are two or more categories. If a fuel load is split into identical classes in two separate categories, the reaction intensity is less than if the load is contained in a single class in one category. The author resolves the inconsistency by replacing the weighting parameter for each category with the effective heating number developed from the characteristic surface area-to-volume ratio of each category.

Online Link(s):
Citation:
Frandsen, William H. 1973. Using the effective heating number as a weighting factor in Rothermel's fire spread model. General Technical Report INT-GTR-10. Ogden, UT: USDA Forest Service, Intermountain Forest and Range Experiment Station. 7 p.