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Predicting suitability of different scale-dependent dispersivities for reactive solute transport through stratified porous media

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Journal of Rock Mechanics and Geotechnical Engineering 2016年第6期8卷 921-927页

作者： Deepak Swami Abhimanyu Sharma Pramod Kumar Sharma Dericks P.Shukla School of Engineering Indian Institute of Technology Mandi School of Engineering Indian Institute of Technology Roorkee

In this paper,the behavior of breakthrough curves(BTCs) for reactive solute transport through stratified porous media is investigated.A physical laboratory model for layered porous media was constructed,in which thin layer of gravel was sandwiched in between two thick layers of natural *** layer and natural soil layers were hydraulically connected as single porous continuum.A constant source of tracer was connected through gravel layer and elucidated at different sampling points in the direction of *** multiprocess non-equilibrium(MPNE) transport equation with scale-dependent dispersivity function was used to simulate experimental BTCs of reactive solute transport through layered porous *** values of equilibrium sorption coefficient and other input parameters were obtained *** simulation of BTC was performed using MPNE model with scale-dependent *** simulation of different scale-dependent dispersivities was then compared and it was found that for field scale of estimation of dispersivity,asymptotic and exponential dispersivity functions performed *** continuation to the comparison of simulated BTCs obtained using different models,spatial moment analysis of each aforesaid scale-dependent dispersivity model was also *** moment analysis provides the information related to mean solute mass,rate of mass travel,and mean plume *** and constant dispersivities showed higher variance as compared to asymptotic and exponential dispersion *** supports the field applicability of asymptotic and exponential dispersivity *** BTCs were also found to elucidate a nonzero concentration with time,which was clearly affected by physical *** natural condition,such information is required in effective aquifer remediation process.

关键词： Multiprocess non-equilibrium(MPNE) Scale-dependent dispersivity Stratified porous media spatial moment

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