LEPA and LESA Irrigation Technology
LEPA places the emitter type sprinkler on or just above the soil surface. LESA has the sprinklers located three feet or less above the soil surface and uses spray type sprinklers. LEPA and LESA both double the number of sprinklers on a center pivot.
Both technologies improve the sprinkler system application efficiency, reduce the direct evaporation from the sprinkler, reduces moisture loss from wet leaves, and require less pressure to operate; thus reducing the pump power consumption per acre foot delivered. Although the technology is primarily used on pivots, it can also be used with lateral move irrigation systems. WSU and U of I found water savings of five to 15 percent. WSU and U of I found that LESAs system may also reduce fertilizer requirements, and has the potential to improve crop quality and yield. It’s a win-win for everyone involved.