PNG 550
Reactive Transport in the Subsurface

Lesson 6: Flow and Solute Processes in 1D Systems


This lesson introduces physical processes, including advection, diffusion, and dispersion processes, in 1D system. An example will be shown about how to set up a 1D flow and transport simulation in a homogeneous column in CrunchFlow.

Learning Outcomes

By the end of this lesson, you should be able to:

  • Understand the definition of advection, diffusion, and dispersion;
  • Understand the 1D advection-dispersion equation (ADE);
  • Understand the important parameters and the application of dimensionless numbers (Péclet number) in unifying different observations;
  • Understand what controls the shape of tracer breakthrough curves;
  • Simulate 1D flow and transport using CrunchFlow.

Lesson Roadmap

Lesson Roadmap
Required Readings
  1. Chapter 3 in Geochemistry, groundwater, and pollution, 2nd edition, by C. A. J. Appelo and D. Postma, 2005
  2. CrunchFlow manual (2009), page 72-85; CrunchFlow exercise 6 and 7
Optional Reading
(if phreeqc)
  • Page 16-17, 32-37, and 234-252 in Phreeqc manual (version 3.0), also see example 11, 12, 13, 15, and 21.
To Do
  • Homework


If you have any questions, please post them to our Questions? discussion forum (not e-mail), located in Canvas. The TA and I will check that discussion forum daily to respond. While you are there, feel free to post your own responses if you, too, are able to help out a classmate.