TITLE:
Simulation Monitoring for Rainfall Infiltration in Soil Based on High Density Electrical Method
AUTHORS:
Shanshan Lv, Dengke He
KEYWORDS:
Rainfall Infiltration, Multi Physical Field Coupling, Numerical Simulation, High Density Electrical Method
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.9 No.5,
May
20,
2021
ABSTRACT:
Rainfall infiltration is a porous medium flow problem with variable saturation. Based on the theoretical analysis of the flow field, electrical conductivity of rocks, the electrical field, the paper simulates the coupling relationship between the water saturation in soil and the apparent resistivity distribution. It combines the Richards equation, the Archie formula and the Laplace equation. The experiment simulates the potential field data by the Wenner setting in electrical exploration on a two-layer geologic model with continuous rainfall during 5 days, which shows that the effective saturation in soil is increasing with the rainfall time, while the apparent resistivity is decreasing. This can provide a theoretical basis for the analyzing the rainfall infiltration and porosity of the soil by using high-density electrical method in the future.