State Key Laboratory Base of Eco-hydraulic Engineering in Arid Area, Xi'an University of Technology, Xi'an, China.
School of Civil Engineering, Hubei Engineering University, Xiaogan, China.
PLoS One. 2022 Sep 9;17(9):e0274265. doi: 10.1371/journal.pone.0274265. eCollection 2022.
In order to study the effect of the rainfall infiltration on water migration in compacted loess, a model device was developed for testing water migration in the soil under rainfall conditions. In this study, the volumetric water content and resistivity of soil were introduced into the model test device. This model test device was applied to the study of water migration characteristics in compacted loess under different rainfall conditions. The results show that the resistivity decreases with the increase of the volumetric water content at the same depth of the loess column. In this way, the characteristics of the water migration can also be reflected from the change of the resistivity. There is an intimate relationship between the resistivity and volumetric water content, dry density. The volumetric water content and dry density are normalized by saturation of loess, arriving the equation of saturation against the resistivity. The characteristics of rainfall infiltration in compacted loess show a particular pattern, which demonstrates that, with the increase of dry density of the loess column, the rainfall infiltration line present "Y", "D" and "Λ" shape distribution respectively, under light rain, heavy rain and rainstorm.
为了研究降雨入渗对压实黄土中水分运移的影响，开发了一种用于在降雨条件下测试土壤水分运移的模型装置。本研究将土壤体积含水量和电阻率引入模型试验装置，应用于不同降雨条件下压实黄土水分运移特性的研究。结果表明，在黄土柱同一深度处，电阻率随体积含水量的增加而降低。因此，也可以通过电阻率的变化来反映水分运移的特征。电阻率与体积含水量、干密度之间存在密切关系。将体积含水量和干密度归一化到黄土的饱和度，得到电阻率与饱和度的关系式。压实黄土降雨入渗特性表现出一定的规律，表明随着黄土柱干密度的增加，小雨、大雨和暴雨条件下的降雨入渗线分别呈现“Y”、“D”和“Λ”形分布。
