WATER LOSSES FROM WET AREAS 



113 



PLATE XXIX 



USE OF WATER BETWEEN CONTROLS IN COLDWATER CANYON AND 

 DAILY MAXIMUM TEMPERATURES AT SAN BERNARDINO DURING 1932. 



of water between the upper and middle controls for the months May 

 to October, inclusive. This use is indicated to be 50 acre-inches per 

 1000 feet of canyon and. since the canyon bottom area averages one 

 acre for each 1000 feet of canyon, the use of water in the canyon 

 bottom is 50 acre-inches per acre. 



During August, 1932, the average daily loss from the stream 

 between the upper and middle controls per 1000 feet of canyon was 

 equivalent to 0.74 southern California miner's inch, continuous flow. 



From the graphs on Plate XXIX, a comparison by months can be 

 made of the losses in the two sections of canyon. The average rate of 

 use of water per 1000 feet of canyon between the middle and lower 

 controls was 0.47 acre-inch per day during July, 0.49 acre-inch per 

 day during August, 0.42 acre-inch per day during September, and 

 0.30 acre-inch per day during October in 1932. Between the upper and 

 middle controls, the average rate of use of water per 1000 feet of 

 canyon was 0.33 acre-inch per day during July, 0.35 acre-inch per day 

 during August. 0.30 acre-inch per day during September, and 0.20 

 acre-inch per day during October. 



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