Development and Application of a Regional Model of NY/NJ Harbor For the Protection of
Beaches and Shellfish Areas
Charles DujardinCharles Dujardin
HydroQual, Inc.HydroQual, Inc.
September, 2008September, 2008
Regional Model Development Overview
Planned and Unplanned Sewage Discharges Causes Planned and Unplanned Sewage Discharges Causes Regional ConcernRegional Concern
Lack of Tri-State Communication is EvidentLack of Tri-State Communication is Evident
Lack of Predictive Tool is EvidentLack of Predictive Tool is EvidentImpact on beaches and shellfish areasImpact on beaches and shellfish areas
Regional Bypass Workgroup is FormedRegional Bypass Workgroup is FormedEstablish Communication ProtocolEstablish Communication Protocol
Develop Predictive Tool to Assess Conditions Develop Predictive Tool to Assess Conditions
Regional Events of Concern
Pipeline Leak and Pump Station Bypass near City IslandPipeline Leak and Pump Station Bypass near City IslandPrecautionary Closures at Orchard BeachPrecautionary Closures at Orchard Beach
Westchester County Closes BeachesWestchester County Closes BeachesConnecticut Closes BeachesConnecticut Closes Beaches
Regional Bypass WorkgroupParticipants
Wastewater AdministrationWastewater AdministrationNYS DECNYS DEC
NJ DEPNJ DEP
CT DEPCT DEP
IECIEC
EPAEPA
NYC DEPNYC DEP
USCGUSCG
ConsultantConsultantHydroQual, Inc.HydroQual, Inc.
Shellfish & HealthShellfish & HealthNYS DECNYS DEC
NYS DOHNYS DOH
NJ DEPNJ DEP
FDAFDA
NYC DOHNYC DOH
Nassau Co HDNassau Co HD
Westchester Co HDWestchester Co HD
Rockland Co HDRockland Co HD
Suffolk Co HDSuffolk Co HD
NPSNPS
Model Development Considerations
Parameters of ConcernParameters of ConcernTotal/Fecal ColiformTotal/Fecal Coliform
EnterococciEnterococci
Water-bodies ConsideredWater-bodies ConsideredNY-NJ HarborNY-NJ Harbor
Long Island SoundLong Island Sound
Atlantic Ocean (NJ Coast)Atlantic Ocean (NJ Coast)
Input VariablesInput VariablesDuration , Quantity & Quality of DischargeDuration , Quantity & Quality of Discharge
TemperatureTemperature
Regional Bypass Program
Discharge Characterization SpecificationsDischarge Characterization SpecificationsSelect Discharge LocationSelect Discharge Location
Volume Rate (MGD)Volume Rate (MGD)
ConcentrationConcentration
View ResultsView ResultsSelect Site LocationSelect Site Location
View Temporal ProfileView Temporal Profile
View AnimationsView Animations
Initial Pathogen Discharge Model is Developed
Limitations of Initial Model (1998)Limitations of Initial Model (1998)Limited number if discharge locationsLimited number if discharge locations
Limited number of viewing locationsLimited number of viewing locations
Could not handle multiple dischargesCould not handle multiple discharges
Time of discharge within tidal-cycle is approximatedTime of discharge within tidal-cycle is approximated
Model Improved in 2008Model Improved in 2008Computer speed, GIS ApplicationComputer speed, GIS Application
Unlimited number of discharge locationsUnlimited number of discharge locations
Model results may be viewed through animationsModel results may be viewed through animations
Multiple discharges are possibleMultiple discharges are possible
Model Execution
After Discharges Are Entered User Clicks “Run Model”After Discharges Are Entered User Clicks “Run Model”
Model Execution Takes About 5 MinutesModel Execution Takes About 5 Minutes
User Immediately Views ResultsUser Immediately Views Results
Time Series in Any Model SegmentTime Series in Any Model Segment
Animation (Movie) of ResultsAnimation (Movie) of Results
Summary
Model Has Been Distributed To Over a Dozen State and Model Has Been Distributed To Over a Dozen State and Local Environmental, Health, and Shellfish AgenciesLocal Environmental, Health, and Shellfish Agencies
There Are Nearly 100 Spill Events Per YearThere Are Nearly 100 Spill Events Per Year
Agencies Can Quickly Assess If There Is a Concern After a Agencies Can Quickly Assess If There Is a Concern After a Spill Event Spill Event