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Unit 11: Fire Behavior Prediction Systems

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Systems Pt. 1   ::   Worksheet & Field Guide   ::  Practice  ::   Systems Pt. 2   ::   Estimating   ::   Exercises

Practice Calculating Fire Behavior Output Values

Using the input data below and a worksheet for predicting fire behavior practice calculating fire behavior output values.

Input data for head of the fire:
Date : November 10
Time : 1500
Elevation : 2500 feet
Aspect : South
Temperature : 75 degrees
Relative humidity : 32%
Shading : 20%
Fuel model : 4 (tall brush)
Dead fuel moisture : 6%
Live fuel moisture : 150%
Midflame windspeed : 3 mph (upslope component)
Slope percent : 45
Size : Spot fire

  1. What is the adjusted rate of spread?
  2. What is the adjusted fireline intensity?
  3. What is the flame length?
  4. What is the probability of ignition?
  5. What is the fire's area at 1800?
  6. What is the fire's perimeter at 1800?

Copyright 2008, by the Contributing Authors. Cite/attribute Resource . admin. (2005, November 16). Unit 11: Fire Behavior Prediction Systems. Retrieved January 07, 2011, from Free Online Course Materials — USU OpenCourseWare Web site: http://ocw.usu.edu/Forest__Range__and_Wildlife_Sciences/Wildland_Fire_Management_and_Planning/Unit_11__Fire_Behavior_Prediction_Systems_4.html. This work is licensed under a Creative Commons License Creative Commons License