What is LEPA?

Low energy precision application (LEPA) is a modification to the typical

sprinkler configuration on center pivots or linear-move machines that

minimizes evaporation and wind drift losses by running the water directly

onto the soil surface at very low pressure. Because much less water is lost

to wind drift and evaporation, and less of the soil surface is wetted there

is less evaporation of water from the soil surface making it much more efficient.

It operates at much lower pressures and consequently saves significant

pumping energy. However, because water is applied to the soil in much

less time, ponding and runoff can become a greater issue unless the field

is tilled and the irrigation system is operated in such a way to limit this

runoff. This may include using furrow diking and drag socks to limit the

erosion of these dikes , using a dammer/diker to increase the soil

surface water storage, or speeding up the irrigation system to apply

smaller application depths in each pass.

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