AMERICAN FOREST CONGRESS 73 



foot per second per square mile, the discharge would 

 be 100 cubic feet per second, or equivalent to 1,036,- 

 800,000 cubic feet effective storage capacity, a dis- 

 charge more than equivalent to one-half the storage 

 capacity of all the reservoirs above Lake Spaulding 

 dam. These aggregate 1,375,000,000 cubic feet, and 

 the low-water discharge of 100 cubic feet per second 

 for one hundred and twenty days is equivalent to a 

 storage capacity of 1,036,000,000 cubic feet. As the 

 basis of the above estimate is the extreme low-water 

 discharge, it is safe to- assume that by afforesting the 

 watershed, this costly and extensive system of reser- 

 voirs might be safely drawn upon for double their 

 present capacity. When this reasoning is applied to 

 the entire 1,357 square miles, instead of to small 

 fractions thereof, the force of the argument becomes 

 more apparent. 



"It would appear from the foregoing that the solu- 

 tion of the problem of storage of flood waters is not 

 in the retention of a small percentage of the storm 

 waters behind dams, but in applying storage over the 

 entire watershed by the systematic protection and 

 extension of forest and brush-covered areas." 



Professor James W. Tourney, a collaborator of the 

 Bureau of Forestry, has selected certain small and 

 adjoining drainage basins in the San Bernardino 

 Mountains in a portion of the catchment area proposed 

 to be utilized by the Arrowhead Reservoir Company. 

 Throughout this area this corporation for a term of 

 years has been making exhaustive hydrographic studies 

 of the available water supply. A large number of rain 

 gauges have been established and stream measurements 

 are carefully made over weirs by skilled engineers. 

 Automatic clock registering devices have been installed 

 to give a continuous record of the flow at these various 



