WATER LOSSES FROM WET AREAS 



117 



TABLE 42 



MONTHLY MEAN MAXIMUM AND MINIMUM TEMPERATURES AT THE MOUTH OF 

 COLDWATER CANYON, AT ALPINE, AND AT SAN BERNARDINO 



TABLE 43 

 LOSS OF WATER FROM ATMOMETERS AT COLDWATER CANYON 



July 18. to October 24, 1932 



Values are also given in Table 42 of the monthly mean maximum and 

 minimum temperatures at the Squirrel Inn and San Bernardino 

 "Weather Bureau stations for June to October, inclusive, during 1931 

 and 1932. 



Table 43 gives the use from each of the atmometers during the 

 periods between readings from July 18 to October 24, 1932. 



For the period from September 7 to 15, 1932, a more intensive 

 study was made of the meteorological data at Coldwater Canyon. An 

 eva])orimeter (described in detail on page 97), a hygro-thermograph, 

 and a second atmometer were placed near the mouth of the canyon 

 in addition to the maximum and minimum thermometers, rain gage, 

 and atmometer already there. Two thermographs, one to record the 

 air temperature and the other to record the temperature of the stream, 

 and an additional atmometer were placed near the lower control in the 

 canyon. There were also installed at the same location an evaporation 



