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Development and Application of a Regional Model of NY/NJ Harbor For the Protection of Beaches and Shellfish Areas

Development and Application of a Regional Model of NY/NJ Harbor For the Protection of Beaches and Shellfish Areas. Charles Dujardin HydroQual, Inc. September, 2008. Regional Model Development Overview. Planned and Unplanned Sewage Discharges Causes Regional Concern

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Development and Application of a Regional Model of NY/NJ Harbor For the Protection of Beaches and Shellfish Areas

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  1. Development and Application of a Regional Model of NY/NJ Harbor For the Protection of Beaches and Shellfish Areas Charles Dujardin HydroQual, Inc. September, 2008

  2. Regional Model Development Overview • Planned and Unplanned Sewage Discharges Causes Regional Concern • Lack of Tri-State Communication is Evident • Lack of Predictive Tool is Evident • Impact on beaches and shellfish areas • Regional Bypass Workgroup is Formed • Establish Communication Protocol • Develop Predictive Tool to Assess Conditions

  3. Regional Events of Concern • Pipeline Leak and Pump Station Bypass near City Island • Precautionary Closures at Orchard Beach • Westchester County Closes Beaches • Connecticut Closes Beaches

  4. Wastewater Administration NYS DEC NJ DEP CT DEP IEC EPA NYC DEP USCG Consultant HydroQual, Inc. Shellfish & Health NYS DEC NYS DOH NJ DEP FDA NYC DOH Nassau Co HD Westchester Co HD Rockland Co HD Suffolk Co HD NPS Regional Bypass WorkgroupParticipants

  5. Model Development Considerations • Parameters of Concern • Total/Fecal Coliform • Enterococci • Water-bodies Considered • NY-NJ Harbor • Long Island Sound • Atlantic Ocean (NJ Coast) • Input Variables • Duration , Quantity & Quality of Discharge • Temperature

  6. Regional Bypass Program • Discharge Characterization Specifications • Select Discharge Location • Volume Rate (MGD) • Concentration • View Results • Select Site Location • View Temporal Profile • View Animations

  7. Initial Pathogen Discharge Model is Developed • Limitations of Initial Model (1998) • Limited number if discharge locations • Limited number of viewing locations • Could not handle multiple discharges • Time of discharge within tidal-cycle is approximated • Model Improved in 2008 • Computer speed, GIS Application • Unlimited number of discharge locations • Model results may be viewed through animations • Multiple discharges are possible

  8. Model Domain Full Domain NY/NJ Harbor

  9. GIS Information Layers Available (7)Example: Beach Locations

  10. GIS Information Layers Available (7)Example: CSO Locations

  11. Add LoadSpecify: Flow, Duration, Time, and Concentration and Click on Location

  12. Model Execution • After Discharges Are Entered User Clicks “Run Model” • Model Execution Takes About 5 Minutes • User Immediately Views Results • Time Series in Any Model Segment • Animation (Movie) of Results

  13. User May View Time Series ResultsIn Any Model Segment

  14. View AnimationExample: 6 Hours After Release

  15. View AnimationExample: 12 Hours After Release

  16. View AnimationExample: 25 Hours After Release

  17. View AnimationExample: 44 Hours After Release

  18. User May Zoom-InTo View Details of Results

  19. Summary • Model Has Been Distributed To Over a Dozen State and Local Environmental, Health, and Shellfish Agencies • There Are Nearly 100 Spill Events Per Year • Agencies Can Quickly Assess If There Is a Concern After a Spill Event

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