Informative Profile for 2D Infiltration Problem with Process Observation

Simulation of the saturated-unsaturated flow in soil-aquifer system needs to estimate the moisture distribution in soil and the groundwater mound growth in phreatic aquifer. An informative profile was produced for 2D infiltration problem with process observation of the saturated-unsaturated flow in an entity. A numerical technique for solving the interface problem that was close to the air-water interface was developed by way of interfacial error analysis with respect to the existing water table underground. Numerical error that produced from the interface mainly owing to rapid shift of sharp moisture front may be corrected by use of the proposed interfacial technique. The smaller air entry value resulted in the larger relative simulation error while the absolute error did not change for different soils described by the popularly used Brook-Corey function. A negative error from the calculation of water potential always decelerated the growth of groundwater mounds. The accurate calculation of water potential at the block boundary helped to achieve more precise numerical results so that the 2D infiltration profile could be observed informatively with process presentation.