The average fuel parameters of the simulated fuel array are given in table 2. 

 A comparison with figures 3 and 4 shows the tabular load and depth values to be 

 within one standard deviation of the averages given in the figures except for lOOh 

 fuels. The foliage load is not given as a distribution. The foliage load is a 

 fraction of the sum of the Ih, lOh, and lOOh fuel loads (appendix III). The simu- 

 lated serial correlations of the depth for lag 1 were 0.12, 0.31, and 0.11 for 

 orientations 1, 2, and 3, respectively. These correlations are reduced consider- 

 ably from the original correlations used to generate the fuel array. However, 

 these correlation data showed the best comparison while maintaining an average 

 depth comparable to the original data. Other correlations can be obtained by 

 manipulation of the error function, but this in turn causes unacceptable changes 

 in the average depth and its variance. The average depth of the final simulated 

 array is 5.45 inches (13.8 cm) with a variance of 18.03 in^ (116.3 cm^) . These 

 data are in good agreement with the original depth data used to generate the fuel 

 array . 







Table 2. --Average fvte 



Z parameters 



for 



slash ■ 





Fuel 



descript 



: Surf ace /volume 



: Dry 



load 





Moisture-^ 

 content 



^^-1 -1 

 ion : ft : cm 



: Ib/ft^ 



: kj 



, 2 

 i/m : 







Slash (fuel depth 



= 0.43 ft (0 



.13 m)) 





Dead 



foliage 



2000 65.6 



0.118 



0, 



.576 



0.05 



Dead 



Ih 



436 14.3 



0.0363 



0, 



. 177 



0.05 



Dead 



lOh 



91 3.0 



0.246 



1. 



. 199 



0.05 



Dead 



lOOh 



29 1.0 



0. 190 



0. 



,926 



0.05 







Moisture of extinction = 



.25 







Fraction of dryweight. 



GRASS AND SAGEBRUSH 



Generation of the grass and sagebrush fuel array is less complicated than 

 generation of the slash fuel array because of the random distribution of the sage- 

 brush plants within the grass matrix. The cell size of the fuel array is chosen 

 to approximate the average diameter of the sagebrush plant, 2.5 feet (76 cm). It 

 is necessary then only to classify the cells randomly as grass or sagebrush from 

 a distribution that reflects the percent cover of the sagebrush within the grass 

 matrix. A value of 30 percent was chosen as representative of the percent cover 

 of sagebrush. Cells were assigned a fuel type of either grass or sagebrush. The 

 fuel descriptors are given in table 1. The fuel depth listed for sagebrush is an 

 equivalent height that when divided into the fuel load gives a bulk density equiva- 

 lent to the shrub crown. 



14 



