UNITED STATES DEPARTMENT OF AGRICULTURE 

 BULLETIN No. 495 



Contribution from the Office of Public Roads and Rural Engineering 

 LOGAN WALLER PAGE, Director 



Washington, D. C. 



V 



February 14, 1917 



SPRAY IRRIGATION 



By 



MILO B. WILLIAMS, Irrigation Engineer 



CONTENTS 



Introduction 



Economic Conditions Justifying Spray 

 Irrigation . 



Farm Conditions Adapted to Spray Irriga- 

 tion 



Amount of Water Required for Spray 

 Irrigation 



Development of Water Supplies . . . . 



Page 

 1 



6 



Screening Water 12 



Types of Spray Irrigation Systems . . 14 



Stationary-Nozzle Spray Systems ... 15 



Stationary Overhead Spray Systems . . 18 



Types of Pumps for Spray Irrigation . . 25 



Designing of Spray Irrigation Systems . 29 



Designing of Pumping Plant 32 



Outline of Procedure for Installing Spray 



Irrigation Systems 35 



Cost Data . 37 



WASHINGTON 

 GOVERNMENT PRINTING OFFICE 



1917 



