Principles of water quality and systems analysis of rivers and lakes. Mathematical methods for modeling environmental systems. Application of models to generic substances within aquatic systems. Incorporating different mass transfer (advection-dispersion, diffusion, volatilization) and mass transformation (e.g., biodegradation, hydrolysis) processes in the mathematical model. Introduction to more complex environmental conditions such as dissolved oxygen, nutrients, and eutrophication. Prerequisite: ENV E 325; corequisite: ENV E 320.