A numerical method of moments for solute transport in physically and chemically nonstationary formations: linear equilibrium sorption with random Kd View Full Text


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Article Info

DATE

2004-02

AUTHORS

B. X. Hu, J. Wu, D. Zhang

ABSTRACT

A Lagrangian perturbation method is applied to develop a method of moments for solute flux through a three-dimensional nonstationary flow field. The flow nonstationarity stems from medium nonstationarity and internal and external boundaries of the study domain. The solute flux is described as a space-time process where time refers to the solute flux breakthrough through a control plane (CP) at some distance downstream of the solute source and space refers to the transverse displacement distribution at the CP. The analytically derived moment equations for solute transport in a nonstationarity flow field are too complicated to solve analytically, a numerical finite difference method is implemented to obtain the solutions. This approach combines the stochastic model with the flexibility of the numerical method to boundary and initial conditions. The developed method is applied to study the effects of heterogeneity and nonstationarity of the hydraulic conductivity and chemical sorption coefficient on solute transport. The study results indicate all these factors will significantly influence the mean and variance of solute flux. More... »

PAGES

22-30

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s00477-003-0161-5

DOI

http://dx.doi.org/10.1007/s00477-003-0161-5

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1030430208


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