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6th International Conference on Estuarine and Coastal Modeling SESSION 2B.2 The Importance of Sediment Transport Modeling for Assessing the Fate of Toxic.

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Presentation on theme: "6th International Conference on Estuarine and Coastal Modeling SESSION 2B.2 The Importance of Sediment Transport Modeling for Assessing the Fate of Toxic."— Presentation transcript:

1 6th International Conference on Estuarine and Coastal Modeling SESSION 2B.2 The Importance of Sediment Transport Modeling for Assessing the Fate of Toxic Chemicals in Aquatic Systems Pravi Shrestha Alan F. Blumberg HydroQual, Inc. Mahwah, NJ Liaqat A. Khan ENSR Redmond, WA David J. Schwab NOAA/GLERL Ann Arbor, MI

2 Fox River WISCONSIN MICHIGAN Door Peninsula LAKE MICHIGAN GREEN BAY Grid Size: 22 x 96 2 km square

3 MODELING STRATEGY Transport Model Processes: Advection Dispersion Wind Wave Model (GBWAVE) Processes: Wave Generation Wave Propagation Energy dissipation Products Wave Height Wave Period Wave Direction Forcing Functions Bed Concentrations Active Sources Products Water Column Conc. Bed Concentrations Products Sediment Concentrations Mass Eroded/Deposited Bed Level Changes Sediment Model (GBSED) Processes: Erosion Aggregation Deposition PCB Model Processes: Transfer Transformation Forcing Functions Sediment Bed Properties Solids Loading Hydrodynamic Model (GBHYDRO) Processes: Water Movement Physics Forcing Functions Tides Winds Rivers Products Water Levels Currents Mixing Forcing Functions Winds

4 FOX RIVER OCONTO RIVER PESHTIGO RIVER MENOMINEE RIVER Time (days) ESCANABA RIVER ISS (mg L -1 ) Fox (80% of sediment loading) Oconto Peshtigo Menominee Escanaba RIVER INFLOWS Min = 1; Mean = 27; Max = 400 WISCONSIN MICHIGAN Door Peninsula LAKE MICHIGAN

5 X X SEDIMENT BED TYPE SHORELINE EROSION WISCONSIN MICHIGAN Door Peninsula Fox River LAKE MICHIGAN WISCONSIN MICHIGAN Door Peninsula Fox River LAKE MICHIGAN 2.84 E08 kg yr E06 kg yr E08 kg yr E08 kg yr E07 kg yr -1 South X-X North X-X

6 WISCONSIN MICHIGAN Door Peninsula Fox River LAKE MICHIGAN LOCATION OF SAMPLING STATIONS FOR SEDIMENTATION RATES

7 ANNUAL SEDIMENTATION RATES Stations Data Model Model Prediction = 0.034; Data = (Error = 19%)

8 COMPARISON OF ISS CONCENTRATION WITH DATA Periods of Ice Cover Dec 19, Apr 21, 1989 Dec 21, Feb 28, 1990 Conclusions F 69% of the data fit in the predicted range F ISS concentrations are reduced in the longitudinal direction F Storm dynamics are not captured by the data ISS (mg/L) Station: 03 Station: 06 Station: 10 ISS (mg/L) Station: ISS (mg/L) Time(days) Station: ISS (mg L -1 )


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