Influence of altitude and aspect on daily variations in factors of forest-fire danger
Document Type: Book
Author(s): G. L. Hayes
Publication Year: 1941

Cataloging Information

  • air temperature
  • Canada
  • coniferous forests
  • duff
  • elevation
  • fire danger rating
  • fire management
  • flammability
  • forest management
  • fuel appraisal
  • fuel moisture
  • fuel types
  • humidity
  • Idaho
  • litter
  • moisture
  • pine forests
  • Pinus monticola
  • Pinus ponderosa
  • precipitation
  • seedlings
  • soil moisture
  • temperature
  • Thuja plicata
  • Tsuga heterophylla
  • Washington
  • wind
Record Maintained By:
Record Last Modified: July 31, 2018
FRAMES Record Number: 38768
Tall Timbers Record Number: 13381
TTRS Location Status: In-file
TTRS Call Number: A1.5/2:591 DDW
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.


This research ws conducted to determine how forest-fire behavior and its controlling variables differ between altitudes throughout the day on north and south slopes. Observations were made at eight stations, six of them paired on north and south aspects of 5,500-, 3,800-, and 2,700-foot elevations, and within 50-foot elevation of the top of a ridge rising from west to east on the Priest River Experiment Forest. The other two were valley-bottom stations, one fully exposed to sun and wind and the other with a partial timber canopy. The variables observed were wind velocity and fuel-moisture content as affecting fire behavior, and air temperature, relative humidity, insolation, soil moisture, and pecipitation as largely controlling fuel-moisture content.

Hayes, G. L. 1941. Influence of altitude and aspect on daily variations in factors of forest-fire danger. Circular No. 591. Washington, D.C., United States Department of Agriculture.