Hydrodynamics and Eutrophication Model Study of Indian River and Rehoboth Bay, Delaware
2006
Cerco, Carl F. | Bunch, Barry | Cialone, Mary A. | Wang, Harry
Indian River and Rehoboth Bay are two shallow bodies that form part of the Delaware Inland Bays system. The Bays are subject to eutrophication problems that accompany agricultural, commercial, and recreational development in the coastal zone. A hydrodynamic/water quality model package was applied to provide a management tool to address eutrophication issues in the two Inland Bays. The CH3D hydrodynamic model simulated transport in Indian River/Rehoboth Bay for 3 years: 1988, 1989, and 1990. Two-dimensional depth-average transport was calculated on a grid containing over 2,000 cells roughly 50 by 100 m in lateral and longitudinal extent. Integration time step was 30 sec. Performance of the model was verified by comparison to observed tide records, current measurements, and salinity data. The water quality model was applied in a continuous mode to simulate conditions in Indian River/Rehoboth Bay for the years 1988-1990. Transport for water quality simulation was provided by the CH3D hydrodynamic model. Other water-quality forcing functions included nonpoint- source loading of nutrients and organic matter, point-source loading of nutrients and organic matter, atmospheric nutrient loading, sediment-water nutrient and oxygen exchanges, oceanic material exchanges, and seasonal light attenuation.
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