Review of Phase 6 Chesapeake Bay Watershed Model

Phase 6, the most recent in a series of increasingly refined iterations of the Chesapeake Bay Watershed Model, is a major departure from previous deterministic and mechanistic versions, specifically in a new approach to water quality simulation that relies on integration of multiple models for different biogeochemical processes in the watershed. 

This report reflects the conclusions of an independent review effort, placing particular emphasis on the new multiple model aspects of the watershed simulation.  Overall, the review panel as a whole was favorably impressed with the integrated Phase 6 framework.  Recommendations from the panel focus largely on future actions, such as a suggestion for the Chesapeake Bay Program (CBP) to more fully exploit the multiple model framework and incorporate estimates of uncertainty into the model output, as well as suggestions to improve the documentation of approaches taken.