The average percent of total water pumped or delivered for use that is stored in the plants root zone.
The percentage of water applied that can be accounted for in soil-moisture increase
The measurement of water lost to evaporation and run-off from an irrigated field, derived from the ratio of the average depth of water seeped and stored at the root zone to the average depth of water applied to the field.
The amount of water stored in the crop root zone compared to the amount of irrigation water applied.
The ratio of the volume of water consumed by irrigation as compared to the volume of water delivered. Efficiency may be computed in terms of the water diverted at the ditch headgate or the water delivered to the farm headgate. Overall efficiency is the product of conveyance efficiency x application efficiency x use efficiency, expressed in percent.
A measure of the amount of irrigation water beneficially used, divided by the amount of water applied.