Published: July 01, 2004
Three models are at the heart of the Chesapeake Bay Environmental Model Package (CBEMP). Distributed flows and loads from the watershed are computed with a highly modified version of the HSPF model. Nutrient and solids loads are computed on a daily basis for 94 sub-watersheds of the Chesapeake Bay watershed. The CH3D-WES hydrodynamic model computes three-dimensional intra-tidal transport on a grid of 13,000 cells. Computed loads and transport are input to the CE-QUAL-ICM eutrophication model which computes algal biomass, nutrient cycling and dissolved oxygen, as well as numerous additional constituents and processes. The eutrophication model incorporates a predictive sediment diagenesis component. Ten years, 1985-1994 are simulated continuously using time steps of 5 minutes (hydrodynamic model) and 15 minutes (eutrophication model). This report comprises the primary documentation of the eutrophication component of the 2002 CBEMP.
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Originator: Chesapeake Bay Program