Document


Title

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

Cataloging Information

Keyword(s):
  • chaparral
  • fire danger rating
  • flame length
  • flammability
  • forest management
  • fuel loading
  • fuel models
  • heat
  • heavy fuels
  • ignition
  • litter
  • minerals
  • rate of spread
  • slash
  • sloping terrain
  • topography
  • understory vegetation
  • wind
Record Maintained By:
Record Last Modified: August 1, 2018
FRAMES Record Number: 26772
Tall Timbers Record Number: 515
TTRS Location Status: In-file
TTRS Call Number: A13.88:INT-10
TTRS Abstract Status: Fair use, Okay, Reproduced by permission

This bibliographic record was either created or modified by the Tall Timbers Research Station and Land Conservancy and is provided without charge to promote research and education in Fire Ecology. The E.V. Komarek Fire Ecology Database is the intellectual property of the Tall Timbers Research Station and Land Conservancy.

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.

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