Title: Prediction of Title: Prediction of Instantaneous Currents Instantaneous Currents in San Diego Bay for in San Diego Bay for Naval Applications Naval Applications Albert Armstrong, LT, USN Albert Armstrong, LT, USN Advisor: Prof. Peter Chu Advisor: Prof. Peter Chu Second Reader: Steven Second Reader: Steven D. Haeger D. Haeger
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Title: Prediction of Instantaneous Currents in San Diego Bay for Naval Applications Title: Prediction of Instantaneous Currents in San Diego Bay for Naval.
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Title: Prediction of Title: Prediction of Instantaneous Currents in Instantaneous Currents in San Diego Bay for Naval San Diego Bay for Naval
Applications Applications
Albert Armstrong, LT, USN Albert Armstrong, LT, USN Advisor: Prof. Peter Chu Advisor: Prof. Peter Chu Second Reader: Steven D. Second Reader: Steven D. HaegerHaeger
• IntroductionIntroduction
• PurposePurpose
• MethodMethod
• ResultsResults
• ApplicationApplication
• ConclusionsConclusions
Title: Prediction of Title: Prediction of Instantaneous Currents in Instantaneous Currents in San Diego Bay for Naval San Diego Bay for Naval
Applications Applications
Mine WarfareMine Warfare
EOD/Diving Ops & Special EOD/Diving Ops & Special WarfareWarfare
• San Francisco BaySan Francisco Bay• New York/New Jersey New York/New Jersey
HarborHarbor• Houston/ GalvestonHouston/ Galveston• Tampa BayTampa Bay• Chesapeake BayChesapeake Bay• Narragansett BayNarragansett Bay• Soo LocksSoo Locks• Los Angeles/Long BeachLos Angeles/Long Beach• Delaware River and Bay Delaware River and Bay • TacomaTacoma• Port of Anchorage Port of Anchorage • New HavenNew Haven
• Verify Water Quality Management & Verify Water Quality Management & Analysis Package (WQMAP) for Analysis Package (WQMAP) for NAVO .NAVO .
MethodMethod
Utilizing WQMAP to:Utilizing WQMAP to:• Design hydrodynamic model for Design hydrodynamic model for
predicting the tidal driven currents of San predicting the tidal driven currents of San Diego Bay.Diego Bay.
• Compare modeled results to NOAA tide Compare modeled results to NOAA tide table predictionstable predictions
• Provide operational windows for Provide operational windows for operations limited to water current operations limited to water current thresholds for ANY location within the thresholds for ANY location within the bay.bay.
Method – What is WQMAP?Method – What is WQMAP?• Integrated hydrodynamic and water quality Integrated hydrodynamic and water quality
modeling system designed for use within modeling system designed for use within coastal and fresh water environments. coastal and fresh water environments.
• Consists of three basic components: Consists of three basic components: – boundary-fitted coordinate grid creation moduleboundary-fitted coordinate grid creation module– a 2D or 3D hydrodynamic modela 2D or 3D hydrodynamic model– water quality or pollutant transport modelwater quality or pollutant transport model
• Executed on a boundary fitted grid system. Executed on a boundary fitted grid system. • Also able to be operated on any orthogonal Also able to be operated on any orthogonal
curvilinear grid or a rectangular grid, which curvilinear grid or a rectangular grid, which are special cases of the boundary fitted grid.are special cases of the boundary fitted grid.
• Geospatial Information System (GIS)Geospatial Information System (GIS)
• Easy to use graphical user interface Easy to use graphical user interface (GUI).(GUI).
MethodMethod
MethodMethod
MethodMethod
• WQMAP AnimationWQMAP Animation
Rotational MatrixRotational Matrix
U’ = U cos + V sin
V’ = V cos - U sin
= 360 - θ
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MethodMethod
ResultsResults
ResultsResults
ResultsResults
ResultsResults
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ResultsResults
ResultsResults
ResultsResults
ResultsResults
ResultsResults
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Application – 21 JAN exercise at Station 4Application – 21 JAN exercise at Station 4
Application – 21 JAN MIW exercise at Application – 21 JAN MIW exercise at Station 4Station 4
Application – 21 JAN MIW exercise at Application – 21 JAN MIW exercise at Station 4Station 4
Application – 21 JAN EOD exercise at Application – 21 JAN EOD exercise at Station 4Station 4
Application – 21 JAN EOD exercise at Application – 21 JAN EOD exercise at Station 4Station 4
ConclusionsConclusions
• WQMAP models very closely to NOAA WQMAP models very closely to NOAA tide table prediction for San Diego tide table prediction for San Diego Bay Entrance.Bay Entrance.
ConclusionsConclusions
• Further model validation utilizing Further model validation utilizing observed ADCP data (preferably from observed ADCP data (preferably from multiple locations) is essential for multiple locations) is essential for modeled grid locations more distant modeled grid locations more distant from the bay entrance.from the bay entrance.
ConclusionsConclusions
• Future Fleet Survey Team (FST) can Future Fleet Survey Team (FST) can become valuable asset to NAVO littoral become valuable asset to NAVO littoral current modeling using WQMAP:current modeling using WQMAP:– Produce bathometry needed for boundary Produce bathometry needed for boundary
fitted grid.fitted grid.– Provide real time forcing data (elevation)Provide real time forcing data (elevation)– Provide real time validation data (ADCP)Provide real time validation data (ADCP)