Study on the infiltration characteristic and the mathematical model of the point source free infiltration under film hole irrigation

Based on the indoor experiment of film hole infiltration,the rule of the side infiltration volume per unit area under film hole single point infiltration and one-dimensional vertical infiltration volume per unit area and the relationship between side infiltration volume,infiltration time and film hole diameter are studied.Then the relationship between the side infiltration volume and vertical volume per unit area are set up.Thereby two single point source infiltration models including the side infiltration volume and one-dimensional vertical volume are established.The models have obvious physical meaning and can be used conveniently for calculating infiltration volume only with vertical infiltration parameter and film hole diameter and infiltration time.With good preciseness,the two models are effective for calculating infiltration volume.