824 



IRRIGATION INVESTIGATIONS IN CALIFORNIA. 



months, set into the ground a few inches and earth was banked up around its sides 

 to the same elevation as the water in it. It had full surface exposed to sun and wind. 

 During November and December, 1881, and January, 1882, this pan was on the 

 railroad bridge, exposed on all sides to sun and air. 



The observers at Kingsburg were instructed, among other things — 



To fill the pan to the normal plane once every day during summer months, less frequently at 

 other seasons pf the year. 



To take observations at the commencement of every fall of rain, and to restore the water surface 

 to the normal plane at the end of every fall of rain. 



To keep a daily record of the temperature of the air, of the water in the pans, and of the water 

 in the river. 



To keep a rainfall record. 



The pan floated in Kings River was protected from the splash of waves bj'^ a 

 wooden frame, into which the pan was fitted so as to float horizontally, without being 

 protected from the sun or wind. 



Evaporation at Kingsburg, Cal., November 1, 1881, to October SI, 1885.^ 



Period. 



Time. 



Temper- 

 ature 

 of air. 



Pan in river. 



Temper- 

 ature of 

 river. 



Temper- 

 ature of 

 water 

 in pan. 



Evapora- 

 tion. 



Pan in air. 



Temper- 

 ature of 

 water 

 in pan. 



Evapo- 

 rated 

 depth. 



November, 1881. 

 December, 1881. 

 January, 1882... 

 February, 1882.. 



MarcJi, 1882 



April, 1882 



May, 1882 



June, 1882 



July, 1882 



August, 1882 



September, 1882 

 October, 1882 . . . 



Total . 



November, 1882 . 

 December, 1882 . 

 January, 1883 .. . 

 February, 1883 . . 



March, 1883 



April, 1883 



May, lH8;i 



June, 1883 



July,18H:j 



August, 1SK3 



September, 188:3. 

 October, IKK) 



Total . 



November, 1883. 

 December, 1883 . 

 January, 1884 ... 



4.80 p.m. 



do .. 



do .. 



,'i p. m... 

 5.15 p.m. 



do .. 



5.45 p.m. 

 6.30p.m. 



do/.. 



6 p.m... 



do .. 



10 a. m.. 



lOa.m , 

 ....do.. 

 ....do.. 

 ....do.. 

 ....do.. 

 ....do.. 

 ....do.. 

 ....do.. 

 ....do.. 

 ....do.. 

 ....do.. 

 ....do.. 



lOa.m . 



do.. 



i) a. m .. 



°F. 



°F. 



°F. 



Feet. 

 0.220 

 .050 

 .090 

 .115 

 .180 

 .260 

 .305 

 .475 

 .660 

 .665 

 .475 

 .135 



3.630 



.115 

 .085 

 .060 

 .100 

 .305 

 .270 

 .160 

 .600 

 .760 

 .920 

 .780 

 .400 



4.405 



.170 

 .085 

 .105 



°F. 



Feet. 

 0.335 

 .120 

 .200 

 .105 

 .265 

 .435 

 .835 

 .940 

 1.075 

 .875 

 .575 

 .195 



5.955 



.100 

 .090 

 .040 

 .070 

 .310 

 .260 

 .310 

 .850 

 .970 

 .970 

 .705 

 .290 



4.965 



.140 

 .065 



.075 



1 See Physical Data and Statistics, William Hammond Hall, State engineer, 1886. 



