Peter Deadman’s research group continues work on the assessment of the impact of agricultural best management practices (BMPs) on water quality, with a focus on watersheds in southwestern Ontario. The research group is using hydrological models (SWAT) to simulate the impact of the frequency and spatial distribution of BMPs on key water quality parameters (nitrogen and phosphorus) in agricultural watersheds. The work includes the use of agent-based models to simulate farmer decision making around the selection and implementation of BMPs.