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Preface |
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| This edition of Applied Contaminant
Transport Modeling has been revised to incorporate the most recent
advances in contaminant transport theory and simulation techniques. In
Part I – “Concepts and Techniques,” several significant changes have been
made. First, we have expanded the discussion of the role of aquifer
heterogeneity in controlling solute transport, and have added a section on
the dual-domain mass transfer approach as an alternative to the classical
advection-dispersion model. Second, we have incorporated several
additional chemical processes and reactions in the discussion of reactive
transport. These include nonequilibrium sorption and microbially mediated
multispecies kinetics. Third, in addition to the three approaches to
transport solution covered in the first edition – Eulerian, Lagrangian,
and mixed Eulerian-Lagrangian, we have added a discussion of the TVD
(total-variation-diminishing) approach which can offer advantages in many
problems. Finally, we have added a new chapter describing solution
strategies for problems involving nonequilibrium processes and
multispecies kinetic reactions, and providing a case study illustrating
the processes of natural attenuation and biodegradation.
In Part II – “Field Applications,” we have updated the discussion of various topics important to field model application, including the selection of transport solution techniques, visualization and graphical user interface software, data needs, model calibration, and uncertainty analysis. In addition, a new case study has been added to demonstrate the application of the dual-domain mass transfer approach to simulation of tracer transport in a strongly heterogeneous aquifer. Another major change in this edition is the addition of Part III – “Advanced Topics,” which includes three new chapters. The first two discuss fundamental concepts and simulation approaches applicable to flow and solute transport modeling under conditions of variable water density and variable saturation, respectively. The final chapter provides an introduction to groundwater management optimization, and discusses the use of the simulation-optimization approach in remediation system design. Finally, we have added problem sets and suggestions for further reading at the end of most chapters, to facilitate the use of this book both as a text in a graduate-level course, and as a reference for practicing hydrogeologists, environmental scientists, and engineers. A collection of modeling software and supplemental materials, designed to accompany this book and available for download without cost, can be used by readers to gain hands-on experience in transport simulation and to complete class projects involving real-world problems. Acknowledgments We are deeply grateful to our colleagues who reviewed one or more
chapters of the second edition, including Barbara Bekins, Prabhakar
Clement, Rick Healy, Ken Kipp, Chris Langevin, Guoping Lu, Barbara Minsker,
Roseanna Neupauer, Chris Neville, Henning Prommer, Claire Tiedeman, and
Patrick Wang. This work has benefited greatly from their expertise in
various aspects of transport modeling. We also acknowledge the
contribution of Diane Norris and Jim Donahoe who prepared or revised some
of the illustrations for the second edition. Finally, we wish to express
our gratitude to the Department of Geological Sciences of the University
of Alabama and to S. S. Papadopulos & Associates, Inc. for their unfailing
support, and for providing the professional environment critical to an
undertaking of this kind. CHUNMIAO ZHENG |
