IRRIGATION" EXPERIMENTS IN IDAHO. 



51 



indicate that losses per square foot of wetted area are largely inde- 

 pendent of the volume of water flowing in the canal, but that they are 

 slightly influenced by the depth of water over the wetted area, and 

 that the per cent loss per mile is greatly influenced by capacity where 



< 





^j^wy^sgrg-^icf fx 



y?y%? u > ^^^7 









^_i 









\ 









































we/ 



■ggs 











\ 



\ 

















































\ 























































\ 







































If 















\ 







































4* 

















\ 





































1*6 

















\ 



\ 









□ 











































\ 

































! 



•IB 

 J* 



1 





















\ 



















































\ 





if 















































\ 



















































\ 



















































\ 



3 

















































\ 



\ 



























S 

 ^ 

























V 



























at*" 





























Q 













































\ 



'• 





















































V 

























( 

 V 



70/ 



V ^ 



i.i 























a 





\ 



f 



















j 

























c 







\ 



a 





i 









^ 



* 



/o 







r si 



Sr S5 - Si-Ss"« 5" 





t '!? i 



"■ ' v *Sf 5; '§ "> ' 



O^voS «. •) M s < 



> 



quantities less than 200 second-feet are carried, but that with capacity 

 in excess of 200 second-feet the percentage of loss is remarkably con- 

 stant. Great care must be used in the designing of small canals to 

 allow for a sufficiently large per cent of loss. 



