Title: Prediction of Instantaneous Currents in San Diego Bay for Naval Applications
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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 . Albert Armstrong, LT, USN Advisor: Prof. Peter Chu Second Reader: Steven D. Haeger. Title: Prediction of Instantaneous Currents in San Diego Bay for Naval Applications . Introduction Purpose Method - PowerPoint PPT Presentation
Transcript of Title: Prediction of Instantaneous Currents in San Diego Bay for Naval Applications
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 Diego Bay Entrance (off Ballast Point), California Predicted Tidal Current January, 2004 Flood Direction, 355 True. Ebb (-)Direction, 175 True. NOAA, National Ocean Service Slack Maximum Slack Maximum Slack Maximum Slack Maximum Slack Water Current Water Current Water Current Water Current Water Day Time Time Veloc Time Time Veloc Time Time Veloc Time Time Veloc Time h.m. h.m. knots h.m. h.m. knots h.m. h.m. knots h.m. h.m. knots h.m. 1 236 1.1 533 858 -1.4 1302 1541 0.8 1821 2057 -0.7 2344 2 320 1.2 611 942 -1.7 1343 1630 1.0 1921 2147 -0.7 3 26 358 1.2 646 1020 -1.9 1418 1710 1.2 2010 2230 -0.8 4 102 432 1.3 719 1054 -2.1 1450 1747 1.3 2051 2308 -0.8 5 136 503 1.3 751 1128 -2.2 1520 1820 1.4 2128 2343 -0.8 6 207 531 1.3 822 1200 -2.3 1550 1851 1.4 2203 7 16 -0.8 237 558 1.3 852 1232 -2.3 1621 1921 1.4 2236 8 49 -0.8 306 624 1.3 922 1305 -2.3 1651 1951 1.4 2309 9 123 -0.8 339 653 1.3 953 1339 -2.3 1723 2021 1.3 2343 10 200 -0.8 416 725 1.2 1026 1415 -2.1 1756 2053 1.3 11 19 241 -0.8 501 804 1.1 1103 1454 -1.9 1830 2128 1.2 12 58 329 -0.8 559 851 0.9 1147 1539 -1.7 1908 2210 1.1 13 143 426 -0.9 714 954 0.7 1245 1632 -1.3 1951 2302 1.1 14 234 535 -1.0 853 1126 0.5 1409 1739 -1.0 2041 15 7 1.0 331 650 -1.2 1041 1326 0.6 1604 1858 -0.8 2141 16 119 1.1 430 802 -1.6 1204 1458 0.8 1749 2017 -0.7 2247 17 227 1.2 526 906 -2.0 1305 1604 1.2 1907 2126 -0.8 2351 18 326 1.4 620 1001 -2.4 1356 1657 1.5 2006 2224 -0.9 19 49 419 1.6 711 1051 -2.7 1442 1744 1.8 2055 2314 -1.1 20 140 507 1.8 759 1137 -2.9 1525 1827 1.9 2139 21 0 -1.2 228 552 1.9 845 1221 -3.0 1607 1908 2.0 2220 22 43 -1.2 314 635 1.8 929 1303 -2.9 1647 1948 1.9 2300 23 125 -1.3 400 716 1.7 1012 1343 -2.7 1724 2027 1.7 2338 24 208 -1.2 447 758 1.5 1053 1423 -2.3 1801 2105 1.5 25 18 252 -1.2 537 841 1.2 1134 1503 -1.9 1835 2143 1.3 26 58 339 -1.1 637 930 0.9 1218 1545 -1.5 1910 2225 1.1 27 143 433 -1.0 754 1034 0.5 1311 1633 -1.0 1947 2315 0.9 28 234 539 -0.9 946 1217 0.3 1432 1735 -0.6 2032 29 23 0.7 333 658 -1.0 1143 1412 0.4 1634 1859 -0.4 2136 30 143 0.7 434 815 -1.2 1248 1529 0.6 1819 2029 -0.4 2258 31 249 0.8 530 916 -1.4 1330 1621 0.9 1924 2136 -0.5 All times listed are in Local Time, and all speeds are in knots.
• 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
PurposePurpose
• Resolve littoral environmental Resolve littoral environmental prediction problems encountered prediction problems encountered from Operation Iraqi Freedom.from Operation Iraqi Freedom.
• 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.
Method – Why WQMAP?Method – Why WQMAP?
• Hydrodynamic modeling program.Hydrodynamic modeling program.
• 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)
Questions?Questions?
