Chapter 22. Models in Space and Time
Published Online: 8 JUN 2005
DOI: 10.1002/0471649643.ch22
Copyright © 2003 John Wiley & Sons, Inc. All rights reserved.
Book Title
Environmental Organic Chemistry
Additional Information
How to Cite
Schwarzenbach, R. P., Gschwend, P. M. and Imboden, D. M. (2005) Models in Space and Time, in Environmental Organic Chemistry, John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/0471649643.ch22
Publication History
- Published Online: 8 JUN 2005
- Published Print: 23 AUG 2002
ISBN Information
Print ISBN: 9780471350538
Online ISBN: 9780471649649
- Summary
- Chapter
Keywords:
- Peclet Number, Damköhler Number;
- vertical turbulent diffusivity;
- shear diffusion model;
- dispersion in rivers and in groundwater
Summary
In this chapter the box model approach is extended to allow for continuous concentration variations in space and time. Steady-state solutions of the resulting diffusion/advection/reaction equation are discussed with the help of nondimensional numbers (Peclet, Damköhler) describing the relative importance of transport vs. reaction. The model is applied to vertical turbulent diffusion and to horizontal diffusion in aquatic systems, as well as to dispersion in rivers and groundwaters.