The percolation rates vary by crop, irrigation system type, soil and the management factor used. Table H shows the deep percolation amounts by irrigation system type for average management.
The last column provides a good indication of the average percolation per hectare for the various irrigation system types.
Landscape systems have a high percolation rate predominantly because application rates are high and the crop rooting depth is quite shallow.
Microspray and microsprinklers are also shown to have high percolation rates but these systems are likely inside greenhouse nursery systems and the water may be recirculated.