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