Wetting front characteristics under film single hole point source infiltration of fertilizer solution

Based on the laboratory experiments, the wetting front characteristics under film hole single point source infiltration of fertilizer solution were studied. Results show that the vertical profile curve of wetting front follows elliptical equation. The transport distance of wetting front with time follows the exponential function equation. Mathematical models for the dynamic movement of wetting front vertical profile and experiential model for cumulative infiltration were developed. The relationships between the change of average soil water content of wetting front and time were established. Moreover, the distribution characteristics of soil water were studied. The study supplies scientific foundation for further study of film hole irrigation.