212 



Irrigation and Drainage 



Amount of water used in irrigation in different countries 

 Name of country No. of acres per sec.-ft. No. of inches per 10 days 



Northern India . . 



Italy 



Colorado 



Utah 



Montana 



Wyoming 



Idaho 



New Mexico .... 

 Southern Arizona . 

 San Joaquin Valley 

 Southern California 



60 to 150 



65 to 70 



80 to 120 



60 to 120 



80 to 100 



70 to 90 



60 to 80 



60 to 80 



100 to 150 



100 to 150 



150 to 300 



3.967 to 1.587 

 3.661 to 3.4 

 2.975 to 1.983 

 3.967 to 1.983 

 2.975 to 2.38 

 3.4 to 2.644 

 3.967 to 2.975 

 3.967 to 2.975 

 2.38 to 1.587 

 2.38 to 1.587 

 1.587 to .793 



E. Perels* tabulates the duty of water in Algeria 

 as follows : 



Water required for irrigation in A Igeria 



-Water used- 



Prom another general table giving the duty of 

 water in different countries, by Flynn,t the results 

 which follow are derived: 



*Landwirthschaftlicher Wasserbau, zweite Auflage, p. 502. 

 t Irrigation Canals and Hydraulic Engineering, p. 293. 



