This volume to discussing the various aspects of estuarine water quality modeling. Topics considered include fundamental principles, estuarine mass transport, BOD/DO and eutrophication model kinetics, kinetics on toxicants, and sediment-water interactions. The book also discusses mixing zone modeling and how to integrate estuarine hydrodynamic and water quality models. Many case studies demonstrating successful model applications are discussed.Preface. . Introduction to River and Stream Water Quality Modeling: Basic Principles and Limitations for Modeling. Definition and Terminology. Study Domain, Model Domain, and Computational Network. Conservation of Momentum Equation and Flow in Channels. Mass Balance. Models in General Use. Model Selection and Testing. River Transport and Surface Exchange Processes: Mass Balance and Movement of Water. Conservative Transport and Mixing of Dissolved Substances. Heat Balance and Temperature Modeling. Gas Transfer. Appendices: Synopsis of Several Water Quality Models Available for Use. Methods of Measuring and Evaluating Measurements of River Flows, Inflows and Tributary Flows.