Analysis of Surface Irrigation Application Efficiency

by Lyman S. Willardson,
A. Alvin Bishop,

Serial Information: Journal of the Irrigation and Drainage Division, 1967, Vol. 93, Issue 2, Pg. 21-36

Document Type: Journal Paper


Precise analytical design of surface irrigation is not possible at the present time (as of 1967). Designs can be improved, however, if the interrelationships of design parameters of infiltration and advance are understood. Two analyses are presented that show the effect of advance time and infiltration rate on water-application efficiency. One analysis treats runoff as a constant proportion of the inflow. The other analysis computes runoff and deep percolation losses from advance and infiltration variables. Both analyses show that surface irrigation water-application efficiencies above 60% are easily attainable under reasonable design and operation conditions. Low water-application efficiencies measured in the field are attributed to overirrigation after the root zone is filled.

Subject Headings: Surface irrigation | Infiltration | Hydraulic design | Runoff | Parameters (statistics) | Inflow | Percolation | Irrigation water

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