Numerical simulation of soil moisture movement in free infiltration type of film hole irrigation

Based on the unsaturated soil water movement theory,a mathematical model for the free infiltration type of film hole irrigation was developed.An indoor experiment was carried out to analyze and verify the simulation results and it was shown that the reasonable simulation values were principally consistent with the experimental values,showing that the model was the soil wetting moisture distribution and film hole infiltration characteristics of the free infiltration type of film hole irrigation were simulated and analyzed with this model for different factor combination.The result indicated that the soi1 texture,bulk density,film hole diameter,initial moisture and irrigation water depth would have a slighter influence on the soil moisture distribution pattern.The soi1 texture,bulk density and film hole diameter would have a greater influence on the water cumulative infiltration and Infiltration rate.The irrigation water depth would have a less influence on the water cumulative infiltration and infiltration rate.The initial moisture would have a slighter influence on the water cumulative infiltration and infiltration rate.