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flood plain

noun
1.
a nearly flat plain along the course of a stream or river that is naturally subject to flooding.
Origin of flood plain
1870-1875
1870-75
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for floodplain
  • Back then, much of the territory was an immense, waterlogged floodplain.
  • In coming days the water will reach the coast, joining tidal waters and inundating the floodplain.
  • Farmers in the floodplain build houses and barns on stilts and watch pink dolphins sport from their doorsteps.
  • And right around the river, sloping gently down to the lakeshore, was a floodplain of silt and clay.
  • The sandstones were deposited by slow-moving streams gently meandering across a nearly-level floodplain.
  • The country's current floods are far worse because of decades of river and floodplain mismanagement, experts say.
  • For example, a landfill cannot be placed near a wetland, fault or floodplain.
  • One of the newest national parks is actually a floodplain forest that floods about ten times a year.
  • But the bug's breeding ground was a small, restricted type of floodplain habitat.
  • There is an enormous floodplain here that is covered in rice.
British Dictionary definitions for floodplain

flood plain

noun
1.
the flat area bordering a river, composed of sediment deposited during flooding
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for floodplain
n.

also flood plain, 1873, from flood (n.) + plain (n.).

Online Etymology Dictionary, © 2010 Douglas Harper
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floodplain in Science
floodplain
  (flŭd'plān')   
Flat land bordering a river and made up of alluvium (sand, silt, and clay) deposited during floods. When a river overflows, the floodplain is covered with water.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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