SCCOOS Web Site Training

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SCCOOS Web Site Training

• Oil Spill Response

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Scenario

• There was an oil spill on June 26, 2009 at
  170000 PDT outside of Long Beach Harbor at
  33.7022 N, 118.2417 W.
• Use the surface current mapping web page and
  Google Earth to answer the following questions
  about this oil spill

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• Will the oil reach the shore?
• If yes, will it move up the coast or down the
  coast? If no, and currents remain consistent at
  12 hours past release time, when will it reach
  the coast?
• What will be the extent of the spill in 12 hours?

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• Go to the surface current mapping web page at
  http//www.sccoos.org/data/hfrnet/
• Go to View Fully Page
• Select 2 km (1.08 nm)
• Set time for
• 2009-06-26
• 170000 PDT

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• 5. Use the coordinate locator to find the vector
  at 33.7022 N, 118.2417 W
• 6. Determine the magnitude (in knots) and
  direction of the vector at this time
• 7. Using this information, how far in nautical
  miles will the oil travel in one hour? (1 kt1
  nm/hr) Record this distance and the heading of
  the vector on the Progressive Vector Diagram
  Worksheet in the appropriate location

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• 8. Move forward one hour using the 1 Hour
  option. Repeat steps 6 and 7 until you have
  recorded information for 12 hours after the
  release time or until the cumulative distance is
  greater than 2 km (1.08 nm)
• Note Depending on the speed of the current, you
  may need to move to an adjacent vector as time
  progresses. Each vector covers an area of 2 km
  (1.08 nm). As you record the distance the oil
  travels, keep an eye on the cumulative distance
  it has moved by using the cumulative distance
  column on the worksheet. If the cumulative
  distance is greater than 2 km, go to step 9 and
  begin plotting the progressive vector diagram in
  Google Earth to determine the coordinates for the
  nearest vector. Return to steps 6 and 7 once you
  have the location for the new vector.

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• You will now use Google Earth to use the
  information on the Progressive Vector Diagram
  Worksheet to see where the oil travels in 12
  hours.
• 9. Open Google Earth
• 10. Enter 33.7022 N, 118.2417 W in the Fly to
  box. Click on the Begin Search icon, which is
  next to the box.

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• 11. Click on the Add Placemark icon.
• Name the placemark T0. Click on OK at the
  bottom of the window.

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• 13. Click on the Show Ruler Icon.
• 14. Disable mouse navigation if it is not
  already disabled.
• 15. Change units to nautical miles in the drop
  down menu.

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• 16. Draw a line from the point of the placemark
  to the location where the oil would travel in one
  hour based on the distance (nm) you recorded in
  the first row of the Progressive Vector Diagram
  Worksheet. Try to get the length and heading as
  close as possible to the information from the
  vector, although it may not be possible to get
  the numbers to match exactly.

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• 17. Click on the Add Placemark icon.
• 18. Drag this placemark to the end of the line
  you just drew. Name the placemark T1. Click on
  OK at the bottom of the window.

This placemark shows you where the oil would be
one after the release time.
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• 19. Click on the clear button in the ruler box.
  
• 20. Click the hide ruler button.
• 21. Click the show ruler button.
• 22. Change units to nautical miles in the drop
  down menu

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• 23. Draw a line from the point of T1 to the
  location where the oil would travel in one hour
  based on the distance (nm) you recorded in the
  second row of the

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• 24. Click on the Add Placemark icon.
• 25. Drag this placemark to the end of the line
  you just drew. Name the placemark T2. Click on
  OK at the bottom of the window.
• This placemark shows you where the oil would be 2
  hours after the release time.

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• 26. Continue drawing lines and adding placemarks
  until you have marked the location where the oil
  would be 12 hours after the release time.

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• 27. Did the oil reach shore after 12 hours?
• If yes, will it move up the coast or down the
  coast?
• If no, and currents remain consistent at 12
  hours past release time, when will it reach the
  coast?

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• ANSWER
• No. It will reach the coast in approximately 32.7
  hours after the release time June 28, 0142 PDT.

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• 28. What are the coordinates of where the oil
  will be 12 hours after the release time?

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• ANSWER
• 334212.12 N
• 1181110.15 W
• The coordinates could vary slightly based on the
  distance resolution and angle accuracy in Google
  Earth. It is tricky to get the exact heading.