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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