The HSPF-based watershed model simulating the impact of management actions on nutrient delivery to the Chesapeake Bay is available from this page. The entire modeling system configured for a linux platform can be downloaded and operated. This system is being offered so that users can run their own scenarios to determine nutrient and sediment delivery based on their own assumptions. Advanced users may want to modify the system or model for their own use.

• For more background information on the Chesapeake Bay Program watershed model and community watershed modeling system, click here.
• For setup instructions and downloadable files, click here.
• Help tips and feedback. Instructions for using or modifying the community model or the linux OS, click here
• CBP data used in the phase 4.3 model runs, click here