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Hydrodynamic Model Study

Hydrodynamic Model Study. Port of Hampton Roads Eastward Expansion of Craney Island Lower James River and Elizabeth River. Virginia Institute of Marine Science Department of Physical Sciences College of William and Mary. J.D. Boon, A.Y. Kuo, H.V. Wang, S.C. Kim,

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Hydrodynamic Model Study

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  1. Hydrodynamic Model Study Port of Hampton Roads Eastward Expansion of Craney Island Lower James River and Elizabeth River

  2. Virginia Institute of Marine ScienceDepartment of Physical SciencesCollege of William and Mary J.D. Boon, A.Y. Kuo, H.V. Wang, S.C. Kim, G.M. Sisson, J.M. Brubaker, J.P. Maa

  3. SINGLE VARIABLE MODEL RESULTS Overall Ranking for Changes in: Water level - current – salinity – sedimentation • North Expansion (Option 6) • Northeast Expansion (Option 9)* • Westward Expansion (Option 5)* • Eastward Expansion (Option 7)* * Channel deepening not significant Elizabeth River flushing not impaired

  4. HISTORICALMODEL RESULTS Overall Ranking for Changes in: Water level - current – salinity – sedimentation • East/West Expansion (Option 7/5a)* • Eastward Expansion (Option 7)* * Channel deepening not significant Elizabeth River flushing not impaired

  5. Hydrodynamic Models Simulate: tides and currents salinity, stratification sedimentation potential flushing and contaminant transport

  6. Why models are important : When building a project that will modify some part of an estuary, only models can evaluate the hydrodynamic changes that may result before the project is built.

  7. VIMS HEM-3D Hydrodynamic Model • 3D hydrodynamics Dual-scale horizontal grid Six vertical layers • Calibrated for James River And the Elizabeth River • Previous Applications in Hampton Roads: Tidal front research Larval transport studies VDOT Third Crossing study

  8. How is the model Applied?

  9. SIMULATION COMPARISONSTest Casesvs.Base Case

  10. BASE CASE This is the condition against which each of the proposed expansion’s primary and alternative designs are tested

  11. TunnelIsland

  12. TEST CASES • Expansion Option 5 – Westward Expansion • Expansion Option 6 – Northward Expansion • Expansion Option 7 – Eastward Expansion • Expansion Option 9 – North/East Expansion • Expansion Option 7/5a – East/West Expansion

  13. TEST CASES • Expansion Option 5 – Westward Expansion • Expansion Option 6 – Northward Expansion • Expansion Option 7 – Eastward Expansion • Expansion Option 9 – North/East Expansion • Expansion Option 7/5a – East/West Expansion • Each option tested with 50 and 55 ft channel

  14. SINGLE VARIABLE MODEL RUNS Case 1 – Base Case w/ 50-ft channel Case 2 – Eastward Expansion w/ 50-ft channel Case 3 – Eastward Expansion w/ 55-ft channel Case 4 – Westward Expansion w/ 50-ft channel Case 5 – Westward Expansion w/ 55-ft channel Case 6 – Northward Expansion w/ 50-ft channel Case 7 – Northward Expansion w/ 55-ft channel Case 8 – North/East Expansion w/ 50-ft channel Case 9 – North/East Expansion w/ 55-ft channel

  15. CASE 10 (50’channel) CASE 11 (55’channel)

  16. HISTORICAL MODEL RUNS Case 1 –Base Case w/ 50-ft channel Case 2 –Eastward Expansion w/ 50-ft channel Case 3 –Eastward Expansion w/ 55-ft channel Case 10 –East/West Expansion w/ 50-ft channel Case 11 –East/West Expansion w/ 55-ft channel

  17. Three Phases of Craney Island Hydrodynamic Model Study • Model Calibration/Verification • Single Variable Runs • Historical Runs

  18. Elizabeth River Calibration Data • Tidal Range and Phase

  19. Mean Tidal Range (1960-1978 Tidal Epoch) Elizabeth River GRBR WEST EAST MNPT PNSY FORT HRVA

  20. Elizabeth River Verification Data • Tidal and Non-Tidal Current

  21. B Residual Current A Lamberts Point Plan View A B Lamberts Point Cross Section

  22. Elizabeth River Verification Data • Salinity

  23. Sewells Point 24Apr2000 8Jun2000

  24. May 1, 2000 (JD 122) OBSERVED PREDICTED

  25. June 7, 2000 (JD 159) OBSERVED PREDICTED

  26. Three Phases of Craney Island Hydrodynamic Model Study • Model Calibration/Verification • Single Variable Runs • Historical Runs

  27. GLOBAL ANALYSIS Using a Geographical Information System(GIS) to determine the Percentage Change by Area

  28. Variables Analyzed: • Water Level • Surface & Bottom Salinity • Surface & Bottom Current • Surface & Bottom Residual Current • Sedimentation Potential

  29. Surface Velocity

  30. JR1 ER1

  31. Case 1 vs. Case 2 - Surface, JR1

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