ABSTRACT
The effects of the spatial and temporal variations in the Kostiakov-Lewis equation parameters on the cumulative infiltration were evaluated. Furrow irrigation field evaluations were performed at each irrigation event along the crop season. During the crop season, maximum spatial variations equal to 94.7, 44.3 and 55.2% were observed, and, spatially, the maximum temporal variations were 80.0, 42.5 and 43.8%, respectively, in the parameters fo, k and a. When fo, k and a varied, respectively, from 0.000033 to 0.000419 m3 min-1 m-1, from 0.00438 to 0.02497 m3 min-1 m-1, and from 0.0 to 0.419, the reflexes on the cumulative infiltration, for an infiltration opportunity time equal to 177 min, were 0.047 to 0.115 m3 m-1, 0.045 to 0.127 m3 m-1, and 0.037 to 0.115 m3 m-1, respectively.
Key words:
furrow irrigation; infiltration; water irrigation management