378 



Irrigation and Drainage 



Fig. 107. Head ditch or cement flume for orange orchard, 

 Redlands, California. 



Pigs. 105 and 106, so that the surplus water from the 

 furrows in the upper one is collected in a foot ditch 

 shown in the center of Fig. 105, and redistributed in 

 a second set of furrows crossing a lower level, shown 

 in Fig. 106. The water may be controlled by a simple 

 gate in a sluice -box, shown at 1,1 in Figs. 105 and 



