Floodplain

Alternative label: 
Flood plain
Definition: 

A floodplain isᅠan area of land adjacent to a stream or river that stretches from the banks of its channel to the base of the enclosing valley walls which provides space for the retention of flood and rainwater.ᅠ It experiences flooding during periods of high discharge. It includes the floodway, which consists of the stream channel and adjacent areas that actively carry flood flows downstream, and the flood fringe, which are areas inundated by the flood, but which do not experience a strong current. Floodplain soils are generally very fertile and they have often been dried-out to be used as agricultural land. Floodplains have also been separated from the river by dikes, berms or other structures designed to control the flow of the river. Nowadays, the objective is to restore them, their retention capacity and ecosystem functions by reconnecting them to the river. Example of action that can be done on floodplains: hedges to break flood streams, e.g. hedges perpendicular to the river flow that are planted in the restored floodplain to slow down floods. In other words, a floodplain is an area near a river or a stream which floods when the water level reaches flood stage.
- Based on Stella definition and Wikipedia, adapted by NWRM project experts

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Last updated: 04 Mar 2015 | Top