SummaryThe water flow equation for two‐dimensional, unsteady infiltration from semicircular furrows in unsaturated soil is solved numerically with the aid of the alternating‐direction implicit (ADI) difference method. Laboratory experiments were conducted on infiltration from semi‐circular furrows into sandy clay loam sott contained in a model tank. Water contents measured at different locations for different times were in close agreement with the predicted moisture profiles and the locations of the wetting f