tampa harbor & harborsym shana heisey olig tampa harbor & harborsym shana heisey olig
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Tampa Harbor Tampa Harbor & HarborSym& HarborSym
Shana Heisey OligShana Heisey Olig
Tampa Harbor Tampa Harbor & HarborSym& HarborSym
Shana Heisey OligShana Heisey Olig
HarborSym HarborSym Development TeamDevelopment Team
• InstInstitute for Water Resourcesitute for Water ResourcesDecision Methodologies DivisionDecision Methodologies Division
Navigation Analysis DivisionNavigation Analysis Division
• JacJacksonville Districtksonville District• Richard Males, RMM Technical Services, Inc.Richard Males, RMM Technical Services, Inc.
Cincinnati, OhioCincinnati, Ohio
• Planning and Management Consultants, Ltd.Planning and Management Consultants, Ltd.Carbondale, IllinoisCarbondale, Illinois
HarborSym HistoryHarborSym History
• IWR modeling philosophy:IWR modeling philosophy:– TransparencyTransparency– PortabilityPortability– Ease of useEase of use
• Initial application: Sabine Neches Initial application: Sabine Neches Waterway, Galveston District, 2002Waterway, Galveston District, 2002
• GOAL:GOAL: Generic Corps-wide model Generic Corps-wide model
HarborSym & Tampa HarborSym & Tampa HarborHarbor
• Partnership began 2/2003Partnership began 2/2003
• Problem: widening study to Problem: widening study to reduce transit delaysreduce transit delays
• Needed additional features Needed additional features beyond Sabine versionbeyond Sabine version
TAMPATAMPA
HARBORHARBOR
•Passing restrictionsPassing restrictions
•Protocol vesselsProtocol vessels
•Safety vesselsSafety vessels
•No lrg. anchoragesNo lrg. anchorages
Major Model Major Model EnhancementsEnhancements
• Graphical user Graphical user interfaceinterface
• Tidal influencesTidal influences
• Vessel generatorVessel generator
• Multiple dock Multiple dock movementsmovements
• Priority VesselsPriority Vessels
• Safety ZonesSafety Zones
Graphical User Graphical User InterfaceInterface
Network builderNetwork builder
Data entry tablesData entry tables
Data explorerData explorer NetworkNetwork
Graphical User Graphical User InterfaceInterface
Zoom Zoom CapabilityCapability
Data Data
TrackingTracking
Incorporating Tide & Incorporating Tide & CurrentCurrent
• Vessels use tide in TampaVessels use tide in Tampa
• Pilots’ tide & current rulesPilots’ tide & current rules– Passage restricted to maximum vessel draft + tidePassage restricted to maximum vessel draft + tide
– No movement allowed for certain vessels if current No movement allowed for certain vessels if current in reach > Xin reach > X
• Translated into HarborSym reachesTranslated into HarborSym reaches
Tidal RulesTidal Rules
• Only astronomical (not meteorological) tidesOnly astronomical (not meteorological) tides• Harmonic AnalysisHarmonic Analysis
– Code Available Code Available
Xtide, Wxtide, Underkeel Clearance ModelXtide, Wxtide, Underkeel Clearance Model
• Tide StationsTide Stations– Primary station long term records used to develop Primary station long term records used to develop
constantsconstants
– Secondary station prediction derived from Primary Secondary station prediction derived from Primary
– Secondary provide lag/attenuation Factors (based on Secondary provide lag/attenuation Factors (based on short term records )short term records )
Tide PredictionTide Prediction
Tide Usage in Tide Usage in HarborSymHarborSym
• Generate external data files for a Generate external data files for a year, read by HarborSymyear, read by HarborSym
• Tide @ node interpolated based on Tide @ node interpolated based on nearest stationsnearest stations
• Evaluate tide rules for vessel Evaluate tide rules for vessel movement, preclude movement if movement, preclude movement if violationviolation
Vessel GeneratorVessel Generator
Why?Why?– TOO MUCH DATATOO MUCH DATA
– Difficult to create future vessel call Difficult to create future vessel call listslists
– Populate the modelPopulate the model
Generated Calls - Data RequirementsGenerated Calls - Data Requirements
– Future fleet estimateFuture fleet estimate• Specific fleet or vessel class populationSpecific fleet or vessel class population• # of vessels / # of possible calls (inter-arrival time)# of vessels / # of possible calls (inter-arrival time)
– Dock-level commodity forecastDock-level commodity forecast
– ConstraintsConstraints• Vessel classes calling each dockVessel classes calling each dock• Vessel classes carrying each commodityVessel classes carrying each commodity
Vessel GeneratorVessel Generator
Current AssumptionsCurrent Assumptions
• Each vessel call carries one Each vessel call carries one commodity to/from a single dockcommodity to/from a single dock– No intra-harbor movements No intra-harbor movements
• Each vessel call is either Each vessel call is either import/exportimport/export
• Yearly basis (no seasonality)Yearly basis (no seasonality)
• Will be relaxed in later versionsWill be relaxed in later versions
Generated Calls Generated Calls ProcedureProcedure
1.1. Allocation priority for vessel classesAllocation priority for vessel classes
2.2. Assign vessel calls from fleet to satisfy Assign vessel calls from fleet to satisfy commodity forecasts (priority order)commodity forecasts (priority order)
3.3. Assign trip frequency based on inter-Assign trip frequency based on inter-arrival timearrival time
4.4. Continue until forecast satisfied, or no Continue until forecast satisfied, or no more vessels available with tripsmore vessels available with trips
Reports:Reports:
– Unsatisfied demandsUnsatisfied demands
– Vessels used to satisfy demandVessels used to satisfy demand
– Vessel Trips / Excess Fleet CapacityVessel Trips / Excess Fleet Capacity
Vessel GeneratorVessel Generator
Future DirectionsFuture Directions
Deepening ModelDeepening Model
– Build upon existing vessel generatorBuild upon existing vessel generator
– Transit rules to accommodate Transit rules to accommodate deepening behaviordeepening behavior
Model Model DemonstrationDemonstration
Model Model DemonstrationDemonstration