New Levee Near Valley Park, Mo. (IMAGE)

Washington University in St. Louis

New Levee Near Valley Park, Mo.

Caption

The new levee near Valley Park, Mo., a community that had to be evacuated during the flood, was nearly overtopped: the waterline is the border between lighter and darker grass. A bicyclist (white circle) provides scale. Paradoxically high levees designed to prevent flooding may actually add to the risk.

Credit

Bob Criss

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