Lecture 4 Set Sprinkler Uniformity & EfficiencyI. Sprinkler Irrigation Efficiency 1. Application uniformity 2. Losses (deep percolation, evaporation, runoff, wind drift, etc.) •It is not enough to have uniform application if the average depth is not enough to refill the root zone to field capacity •Similarly, it is not enough to have a correct average application depth if the uniformity is poor •Consider the following examples: •We can design a sprinkler system that is capable of providing good application uniformity, but depth of application is a function of the set time (in periodic-move systems) or “on time” (in fixed systems) •Thus, uniformity is mainly a function of design and subsequent system maintenance, but application depth is a function of management Sprinkle & Trickle Irrigation Lectures Page 39 Merkley & Allen
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