Written by renowned experts in the field, this book assesses the status of groundwater models and defines models and modeling needs in the 21st century. It reviews the state of the art in model development and application in regional groundwater management, unsaturated flow/multiphase flow and transport, island modeling, biological and virus transport, and fracture flow. Both deterministic and stochastic aspects of unsaturated flow and transport are covered. The book also introduces a unique assessment of models as analysis and management tools for groundwater resources. Topics covered include model vs. data uncertainty, accuracy of the dispersion/convection equation, protocols for model testing and validation, post-audit studies, and applying models to karst aquifers.
General Model Assessment. A Comparison of Model and Parameter Uncertainties in Groundwater Flow and Solute Transport Predictions. A Statistical Discussion of Model Error in the Use of the Advection-Dispersion Equation. Model Testing: A Functionality Analysis, Performance Evaluation, and Applicability Assessment Protocol. The Value of Postaudits in Groundwater Model Applications. Groundwater Modeling in the 21st Century. Needs for the Next Generation of Models. On Models as Management Tools. If It Works, Don't Fix It: Benefits from Regional Groundwater Management. Uncertainty Analysis of Subsurface Transport of Reactive Solute Using Reliability Methods. Groundwater Modeling and Litigation. On Unsaturated/Multiphase Flow and Transport Modeling. On the Numerical Solutions of One-Dimensional Flow in the Unsaturated Zone. Consequences of Scale-Dependency on Application of Chemical Leaching Models: A Review of Approaches. Stochastic Modeling of Water Flow and Solute Transport in the Vadose Zone. Modeling Multiphase Contaminant Flow in Groundwater Aquifers. On Island Modeling. Groundwater Modeling in Hawaii: A Historical Perspective. Modeling Atoll Groundwater Systems. On Biodegradation/Virus Transport Modeling. A Review of Biodegradation Models: Theory and Applications. Evaluation of Groundwater Disinfection Rule "Natural Disinfection" Criteria Using Field Data. On Fracture Flow Modeling. A New Modeling Approach for Predicting Flow in Fractured Formations. Is it Appropriate to Apply Porous Media Groundwater Circulation Models to Karstic Aquifers. Index.