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transport modeling

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23 - Transport in Flowing Groundwater
from PART II - REACTION PROCESSES
Craig M. Bethke, University of Illinois, Urbana-Champaign
Book:

Geochemical and Biogeochemical Reaction Modeling

Published online:

09 December 2021

Print publication:

06 January 2022, pp 273-288
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Summary

In this chapter we develop a numerical model of the transport of chemical mass within flowing groundwater. Starting with a derivation of the advection–dispersion equation, we consider how the equation may be cast in discrete form as a finite difference equation. We further discuss the numerical stability of the calculation procedure and the numerical dispersion inherent in the discrete solution, concluding with a worked example.