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 0100200300400500 Time (days) ESCANABA RIVER 1000 100 10 1 0.1 1000 100 10 1 0.1 1000 100 10 1 0.1 1000 100 10 1 0.1 1000 100 10 1 0.1 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 -1 2.53 E06 kg yr -1 1.22 E08 kg yr -1 2.63 E08 kg yr -1 8.46 E07 kg yr -1 South X-X North X-X

6. 137 77 69 63 101 79 71 64 86 65 87 39 80 73 47 88 66 81 30 74 38 43 48 44 31 24 32 40 25 33 26 2021 27 16 22 12 17 8 18 13 9 56 10 14 11 2 7 WISCONSIN MICHIGAN Door Peninsula Fox River LAKE MICHIGAN LOCATION OF SAMPLING STATIONS FOR SEDIMENTATION RATES

7. ANNUAL SEDIMENTATION RATES 268101214172022252731333943476365697377808688137 5791113171821242630323840444864667174798187101 Stations Data Model Model Prediction = 0.034; Data = 0.042 (Error = 19%)

8. COMPARISON OF ISS CONCENTRATION WITH DATA Periods of Ice Cover Dec 19, 1988 - Apr 21, 1989 Dec 21, 1989 - 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: 14 0100200300400500 ISS (mg/L) Time(days) Station: 18 100 1 0.01 0.001 0.1 10 100 1 0.01 0.001 0.1 10 100 1 0.01 0.001 0.1 10 100 1 0.01 0.001 0.1 10 100 1 0.01 0.001 0.1 10 ISS (mg L -1 )