- 28 - 

 It was noted that peak runoff from clearcut basins averaged 11.5 times 

 as great as the mean daily flow while peak runoff on an undisturbed basin 

 was 8.7 times as great as normal mean daily flow. 



It was also noted by Foggin and Forcier (26) that clearcut drainages near 

 Missoula had a larger discharge than uncut drainages. 



Packer (55) studied clearcuts in Montana's Flathead National Forest and 

 found the clearcut areas receive four more inches of water from melting 

 snow than unforested areas. 



In a snowmelt study in northwestern Montana, Packer (54) found that on 

 south facing slopes the rate of melt decreased as slope increased and 

 on north facing slopes the opposite occurred - the rate of snowmelt 

 increased as slope increased. 



A five year study of the Coram Experimental Forest in Montana was done by 

 Tackel (63). He noted that for the first year after logging the infil- 

 tration capacity of skid roads, scarified areas and broadcast burned areas 

 averaged 4.1 percent, 15.4 percent, and 62.5 percent respectively of the 

 infiltration capacity of undisturbed soil. During the next four years, 

 the burned and scarified areas improved (increasing infiltration capacity), 

 but the skid roads remained impervious. 



D. Temperature 



The species composition and activity of any aquatic environment is 

 partially regulated by temperature. Water temperature affects the ability 

 of organisms to survive and reproduce effectively (EPA, 1976). 



Silvicultural activities that can influence stream temperature include 



