Numerical simulation of soil moisture distribution and infiltration characteristics of one-dimensional vertical infiltration

Taking the theory of water movement in unsaturated soil,as a basis,a mathematical model for one-dimensional vertical infiltration was developed to describe soil water movement and the software SWMS-2D was used to solve this model.The simulation result was analyzed and verified by indoor experiment,which showed that both results of simulation and experiment were consistent with each other,so that the model was rational.The soil moisture distribution in the case of definite combination of irrigation elements and the infiltration characteristics were simulated numerically with this model and method.The result indicated that the soi1 characteristics,bulk density,initial water content and irrigation water depth had a slight influence on the soil moisture distribution pattern.The soi1 characteristics and bulk density had a greater influence on the variation of soil moisture content and water cumulative amount of infiltration and the initial water content and irrigation water depth had a smaller influence on the soil moisture content and water cumulative amount of infiltration.