This course includes an introduction to systems and modeling approaches as techniques for describing the behavior of nonpoint source (NPS) contaminants. Pollutant loading to ground and surface waters and wetlands will be explored. Students will use physically based models routinely used by the U.S. EPA, USDA-ARS, and state environmental agencies. A case study approach and "what-if" scenarios" will be used to investigate best practices to minimize environmental degradation. Emphasis is placed on simulation interpretation. Students will devote approximately 60 percent total class time to hands-on computer exercises and data collection.