Wind Effects on Oil Spills in Rivers

The trajectory (direction of movement) of oil spilled into a river is affected not only by the river currents--which generally take the oil downstream--but also by the wind. If the wind blows straight down the river, the oil may travel quite far down the river before it comes in contact with either bank. But if the wind blows at an angle to the river, the oil is more likely to be blown towards one or the other riverbank.

You can see how this works by looking at two QuickTime movies showing predictions from GNOME (General NOAA Operational Modeling Environment), OR&R's oil spill trajectory model, for a small oil spill in the Columbia River estuary. (You can download QuickTime for free from Apple Computer's Web site. See the link at page bottom.)

20-knot Wind from the East

In this movie, the wind is blowing in almost the same direction as the current is flowing. The oil is not blown towards either riverbank, and flows out the river mouth to the sea.

<a href="../book_shelf/919_E20kt.mov">Show the trajectory with an east wind</a>

20-knot Wind from the Southeast

In this movie, the wind has changed direction to blow more towards the north bank of the river. Because the wind influences the movement of the oil, the oil travels a much shorter distance downstream before it contacts the north bank of the river.

<a href="../book_shelf/920_SE20kt.mov">Show the trajectory with a southeast wind</a>

For more information

Apple Computer's QuickTime Player Download the free QuickTime player. [leaves OR&R site]

Other pages in this series

Oil Spills in Rivers Back to Oil Spills in Rivers.