Forest fire retardant: transmission through a tree crown
Document Type: Report
Author(s): Hal E. Anderson
Publication Year: 1974

Cataloging Information

  • age classes
  • chemical fire retardants
  • conifers
  • crown fires
  • Cupressaceae
  • diameter classes
  • distribution
  • fine fuel
  • fire retardant
  • fire suppression
  • foliage
  • fuel diameter
  • hardwoods
  • overstory
  • pine
  • Pinus monticola
  • precipitation
  • Pseudotsuga menziesii
  • Quercus rubra
  • retardant transmission
  • size classes
  • statistical analysis
  • wilderness fire management
  • wildland fuels
Record Maintained By:
Record Last Modified: June 1, 2018
FRAMES Record Number: 14095
Tall Timbers Record Number: 7237
TTRS Location Status: In-file
TTRS Abstract Status: Okay, Fair use, 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.


Increasing expenditures for forest fire retardant and the development of more efficient delivery systems have emphasized the need for more knowledge on the transmission and retention characteristics of wildland fuels. In a series of tests, retardant was cascaded from an airplane onto arrays simulating wildland fuels. The proportion of retardant retained increased as the fuel diameter and surface roughness of individual fuel elements increased. Equations describing retention were developed and were extended to actual field situations through published research on rainfall. Retardant transmission through a tree crown was modeled; results agreed with published findings on the transmission of rain.

Online Link(s):
Anderson, Hal E. 1974. Forest fire retardant: transmission through a tree crown. Research Paper INT-RP-153. Ogden, UT: USDA Forest Service, Intermountain Forest and Range Experiment Station. 20 p.