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JOURNAL OF FORESTRY 



has a very similar topography, altitudinal range, and characteristics, 

 and geological formation. From the most casual comparison of the 

 two areas the differences in the discharge is apparent. The hatched 

 portion below the blocks indicates the amount of precipitation received, 

 there being too little difference in the rainfall, either in intensity or 

 in amount, to account for the great variation in the amount of water. 



Fig. I 



While there is an increase in the flow from Haines Canyon with each 

 heavy precipitation, this increase is exceedingly slight when compared 

 to the very rapid run-off and high discharge for the other canyon 

 during the same period. It is to be noted, in addition, the rapidity 

 of the fall from the maximum which occurs in the stream without the 

 dams and the sustained high flow of the canyon with the dams, which 



