HEAT LOSS THROUGH 



EVAPORATION (Qg) 



col /cm^/doy 



MAY 

 1961 -1971 MEAN 



IBCW ITS W I TOW 165 W 160 W i55 W 150 W 145 W 140 W 135 W ISO* 125 W 120 W 115 W 



99 



