Study on rainfall infiltration characteristic parameters of unsaturated soil

The study of the rainfall infiltration mechanism unsaturated soil has always been a hot issue in field geotechnical engineering. It is worth studying which parameters should be introduced to characterize characteristics calculation and analysis infiltration. In this paper, Fredlund–Xing model was quoted SEEP/W module Geostudio software, transient numerical under same duration T different intensity I carried out for column. Three characteristic were introduced: front depth WF , suction reduction MR n section rate IR . variation these three during sorted analyzed; it indicated that increases with extension duration. decreases increase %, when 24 h, maximum column affected by approximately 35% total depth. mainly saturation permeability coefficient k s There limit value influence on WF, conditions paper = 2.5