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Development of a Three-Dimensional Hydrodynamic Model of Chesapeake Bay

by B. H. Johnson, US Army Engineer Waterways, Experiment Station, United States,
K. W. Kim, US Army Engineer Waterways, Experiment Station, United States,
Y. P. Sheng, US Army Engineer Waterways, Experiment Station, United States,
R. E. Heath, US Army Engineer Waterways, Experiment Station, United States,



Document Type: Proceeding Paper

Part of: Estuarine and Coastal Modeling

Abstract:

A time-varying 3D numerical model of Chesapeake Bay has been developed to provide flow fields and vertical eddy diffusivities to a 3D water quality model of the bay. The water surface, 3D velocity field, salinity, and temperature are computed. Major physical processes affecting bay circulation and vertical mixing are modeled. Particular features of the model include the solution of transformed equations on a boundary-fitted grid in the horizontal plane, an external mode that provides water-surface elevations to the internal 3D computations, and a simplified second-order turbulence model that involves the solution of only algebraic equations. Three separate data sets of about 1-month duration each have been employed in the verification of the model.

Subject Headings: Three-dimensional models | Water quality | Hydrologic models | Mathematical models | Bays | Numerical models | Water circulation

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