GRASS AND SAGEBRUSH 



The distribution of the rate of spread in the absence of wind and slope is 

 given in figure 7. Uniform model predictions are obtained by averaging the fuels 

 according to the percent area covered in the fuel array. In addition to the uni- 

 form model average and the nonuniform model average, the uniform rates of spread 

 for grass and sagebrush are given individually along with their average weighted 

 by percent area covered. The additional predictions are possible because the 

 fuel array is made up of two distinct components. 



In addition to the uniform and nonuniform model averages as presented 

 in figures 5 and 6, the uniform results for grass and sagebrush are 

 indicated separately along with the average, weighted by percent area 

 cove red. 



(m/minl 



0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1. i 



20 r- 



10 



5 - 



UNIFORM MODEL 

 (FUELS AVERAGED) , 



SAGEBRUSH-GRASS 

 R. 0. S. AVERAGED' 



SAGEBRUSH 



T 



T 



1 



NONUNIFORM 

 MODEL AVERAGE 



GRASS 



2 3 4 



RATE OF SPREAD (ft/min) 



Figure 7. — Frequency distribictions of rate of spread and fireline intensity in a 

 percent grass-20 percent sagebrush mixture (in absence of wind) . 



18 



