Rainfall Infiltration Mechanism of Unsaturated Soil in Enshi of Western Hubei Province

Infiltration of rainfall into a unsaturated soil slope is a key factor to cause failure of landslides.Based on the analysis of the character of landslides in Enshi of western Hubei,the paper elucidates the process and mechanism of the rainfall infiltration on six kinds of rainfall conditions through self-designed soil column tests.It discusses the change law of volume water content and the transport law of the front of the infiltration.The paper also analyses the influence of rainfall intensity and rainfall duration to rainfall infiltration.The study conducts numerical simulation for the laboratory test by GeoStudio software.Results of the laboratory test and the numerical simulation are almost the same.It validates the mechanism of infiltration of rainfall into a slope.According to the measured data,the study analyses the shortage of nu-merical simulation.This lays the foundation for studies on infiltration of rainfall into a unsaturated soil slope through numerical simulation.