Showing posts with label groundwater. Show all posts
Showing posts with label groundwater. Show all posts

Introduction to Groundwater Modeling: Finite Difference and Finite Element Methods (Series of Books in Geology) Review

Introduction to Groundwater Modeling: Finite Difference and Finite Element Methods (Series of Books in Geology)
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I found this text very valuable in explaining the differences between these two methods and how each handles the dependent variable (head) and its first derivative (flow). The text also discusses Laplaces equation, iterative methods including Gauss-Seidel/SOR. Chapters are dedicated to finite difference and finite element methods under steady-state and transient conditions. It also demonstrates how each element is handled separately using finite element method and then the equations are assembled into a conductance matrix.
This text is a very good complement to other modeling texts. However, if you want to learn how to set up your hydrogeologic conceptual model, what data is needed to develop a good model, how to choose your numerical model, verify, calibrate your model, interpret results and perform a post audit, this is not that text. For the purpose of model setup etc. I would recommend Applied Groundwater Modeling.

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Applied Groundwater Modeling: Simulation of Flow and Advective Transport Review

Applied Groundwater Modeling: Simulation of Flow and Advective Transport
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This book is probably the best ever written on the subject. In other words, the content is really 1st class.
However, the print quality is so poor that I wonder how Anderson and Woessner or their 'managers' did ever even think about letting Elsevier do the print. It looks like something that come out of a fax machine. The figures are difficult to read. Grey-scales in figures have turned into slightly different tones of just black, and sometimes you need the Academic Press print of 1992 to fully understand the figures. The layout of tables that run over two or more pages have been altered to become inlogic compared to the Academic Press print version. Also the letters of the bulk text lacks reader friendliness. My advise is to look for the book printed by academic press and not by Elsevier.

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Creating numerical groundwater models of field problems requires careful attention to describing the problem domain, selecting boundary conditions, assigning model parameters, and calibrating the model. This unique text describes the science and art of applying numerical models of groundwater flow and advective transport of solutes.Key Features* Explains how to formulate a conceptual model of a system and how to translate it into a numerical model* Includes the application of modeling principles with special attention to the finite difference flow codes PLASM and MODFLOW, and the finite-element code AQUIFEM-1* Covers model calibration, verification, and validation* Discusses pathline analysis for tracking contaminants with reference to newly developed particle tracking codes* Makes extensive use of case studies and problems

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Applied Contaminant Transport Modeling Review

Applied Contaminant Transport Modeling
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This book provided an excellent explanation of the modeling of solutes and groundwater that conveyed a very good understanding of the challenges and methods used without resorting to the use of mathematical sophistication that actual ground water modelers no doubt possess.
In other words, I think that this book would benefit both those that are hydrologists and geologists as well as those that have had some training in environemental site assessment and remediation but have not been exposed to the actual number crunching that is essential for doing actual simulations.

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The challenges facing groundwater scientists and engineers today demand expertise in a wide variety of disciplines–geology, hydraulics, geochemistry, geophysics, and biology. As the number of the subdisciplines has increased and as each has become more complex and quantitative, the problem of integrating their concepts and contributions into a coherent overall interpretation has become progressively more difficult. To an increasing degree transport simulation has emerged as an answer to this problem, and the transport model has become a vehicle for integrating the vast amount of field data from a variety of sources and for understanding the relationship of various physical, chemical, and biological processes.
Applied Contaminant Transport Modeling is the first resource designed to provide coverage of the discipline's basic principles, including the theories behind solute transport in groundwater, common numerical techniques for solving transport equations, and step-by-step guidance on the development and use of field-scale modeling. The Second Edition incorporates recent advances in contaminant transport theory and simulation techniques, adding the following to the original text:
-An expanded discussion of the role of aquifer heterogeneity in controlling solute transport-A new section on the dual-domain mass transfer approach as an alternative to the classical advection-dispersion model-Additional chemical processes and reactions in the discussion of reactive transport-A discussion of the TVD (total-variation-diminishing) approach to transport solution-An entirely new Part III containing two chapters on simulation of flow and transport under variable water density and under variable saturation, respectively, and a third chapter on the use of the simulation-optimization approach in remediation system design
Applied Contaminant Transport Modeling, Second Edition remains the premier reference for practicing hydrogeologists, environmental scientists, engineers, and graduate students in the field. In 1998, in recognition of their work on the first edition, the authors were honored with the John Hem Excellence in Science and Engineering Award of the National Ground Water Association

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