Influence of Pore Distribution Characteristics on Relative Hydraulic Conductivity in Soil Covers-A Pore-Scale Numerical Investigation
Relative hydraulic conductivity is an important input parameter for water balance models,which are commonly used to evaluate the performance of soil covers.In this paper,pore-network modeling was utilized to analyze the influence of pore distribution characteristics on relative hydraulic conductivity at various water saturations in soils.A drainage process of water slowly invaded by air was simulated to assign various saturations in pore networks.The pore networks have 30×30×30 pores,with log-normally distributed pore diameters in different mean values and standard deviations.Numerical results indicated that the increase in standard deviation and the decrease in the mean value of the pore diameters lead to a decrease in saturated hydraulic conductivity.Larger standard deviation or lower mean value of the pore diameters can result in more evident right-skewed pore diameter distribution.This provides more throats for water to flow at a given saturation,and thus a larger relative hydraulic conductivity in the pore network.
Pore network modeling Pore distribution characteristics Drainage simulation Relative hydraulic conductivity
Guangyao Li Liangtong Zhan Sheng Dai
MOE Key Laboratory of Soft Soils and Environmental Engineering,Zhejiang University,Hangzhou 310058,C MOE Key Laboratory of Soft Soils and Environmental Engineering,Zhejiang University,Hangzhou 310058,C School of Civil and Environmental Engineering,Georgia Institute of Technology,Atlanta 30332,USA
国际会议
The 8th International Congress on Environmental Geotechnics(第八届国际环境土工大会)
杭州
英文
343-350
2018-10-28（万方平台首次上网日期，不代表论文的发表时间）