Amount of Water Used in Irrigation 211 



In Spain, where the rainfall is less than in Italy, 

 and where greater economy of water is practiced, 19 

 important allotments* of water give an average ot 

 2.353 inches every 10 days for various sections ot 

 that country. 



In France, in the Department of the Upper 

 Garonne, contracts were made calling for water at 

 the rate of three -fourths of a liter per hectare per 

 second, which makes a duty of about 93.25 acres per 

 second foot, or water applied at the rate of 2.552 

 inches every 10 days. In the department of Vau- 

 cluse, the concession was at the rate of only 1.361 

 inches per 10 days. 



In Egypt, Willcockst states that in winter water 

 is applied at an average depth of 10 c. in., equal to 

 3.937 inches, once in 40 days, which is a rate of 

 .984 inches once in 10 days; but in summer the first 

 watering is at the rate of 11.5 c. m., equal to 4.528 

 inches, while subsequent waterings are at the rate of 

 3.412 inches in depth. Cotton requires this amount 

 once in 20 days, or at the rate of 1.706 inches per 10 

 days. Rice is given water at the rate of 3.412 inches 

 once every 10 days, and maize gets the same amount 

 every 15 days, or at the rate of 2.276 inches in depth 

 every 10 days. 



Wilson! gives a table of general averages of the 

 duty of water in different parts of the world, which 

 we put in the form stated below: 



*Hall, Irrigation Development, p. 523. 



tWillcorks, Egyptain Irrigation, pp. 234, 235. 



t Manual of Irrigation Engineering, Sec. Ed., p. 49. 



