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7 Cards in this Set
- Front
- Back
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levee
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An artificial embankment of loose material placed at the edge of a channel to prevent floodwater from spreading over a floodplain.
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breaching
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Failure of part of river's levee, leading to some flow outside the main channel.
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piping
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Water seeping through a dam or levee can begin to carry sand and cause erosion.
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avulsion
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The permanent change in a stream channel, generally during a flood when a stream breaches its levee to send most of its flow outside of its channel.
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sand boil
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A pile of sand brought to the surface in water expelled from the ground by liquefaction at shallow depth or during flood when the water pressure under a channel forces groundwater to the surface outside a levee.
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floodway
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Area of floodplain regulated by FEMA for federal flood insurance.
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flood fringe
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The fringe or backwater areas of a flood that store nearly still water during a flood and gradually release it downstream after the flood.
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