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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 for NY/NJ Harbor to safeguard beaches and shellfish areas. Focus on sewage discharge impacts, communication protocols, and predictive tools. The model aids in managing events with predictive capabilities and visualizations for effective decision-making.

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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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