Floodplain or Flood-Prone Area means any land area susceptible to being inundated by water from any source (see definition of flooding) during a 100-year flood as defined by FEMA, FHADs, or channels or drainageways with tributary areas that are 130 acres or greater.

flood plain. See more.

Delivered to your inbox!These policies are generally paid by people who have owned their property since before it was included in a On the opposing banks of the Caloosahatchee, Pine Manor will have fallen entirely into the First Street calculates that nearly 76,000 additional properties there should be in the But First Street calculated that current maps developed by the Federal Emergency Management Agency list just 8.7 million properties in the The plan calls for Biohabitats -- following excavation of the

Floodplains are produced by lateral movement of a stream and by overbank deposition; therefore they are absent where downcutting is dominant.

This is the basis of sustainable flood management.

The extent of floodplain inundation depends in part on the flood magnitude, defined by the Where a detailed study of a waterway has been done, the 100-year floodplain will also include the floodway, the critical portion of the floodplain which includes the In order for flood-prone property to qualify for government-subsidized insurance, a local community must adopt an ordinance that protects the floodway and requires that new residential structures built in Special Flood Hazard Areas be elevated to at least the level of the 100-year flood.

Geologically ancient floodplains are often represented in the landscape by The floodplain during its formation is marked by meandering or The floodplain is the natural place for a river to dissipate its energy. The soils usually consist of clays, silts, and sands deposited during floods. Noun.

English Language Learners Definition of floodplain : an area of low, flat land along a stream or river that may flood : an area of land built up from soil left by floods Floodplain, also called Alluvial Plain, flat land area adjacent to a stream, composed of unconsolidated sedimentary deposits (alluvium) and subject to periodic inundation by the stream. Flood plain definition, a nearly flat plain along the course of a stream or river that is naturally subject to flooding. Commercial structures can be elevated or flood proofed to or above this level. A flood plain is an area that is subject to natural flooding from an adjoining waterway. Meanders form over the floodplain to slow down the flow of water and when the channel is at capacity the water spills over the floodplain where it is temporarily stored.

Floodplains can support particularly rich ecosystems, both in quantity and diversity. 1. floodplain - a low plain adjacent to a river that is formed chiefly of river sediment and is subject to flooding. These example sentences are selected automatically from various online news sources to reflect current usage of the word 'floodplain.'

In some areas without detailed study information, structures may be required to be elevated to at least two feet above the surrounding grade.Land adjacent to a stream or river which is flooded during periods of high discharge Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors.

champaign, plain, field - extensive tract of level open land; "they emerged from the woods onto a vast open plain"; "he longed for the fields of his youth". In terms of flood management the upper part of the floodplain (piedmont zone) is crucial as this is where the flood water control starts.


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Artificial canalisation of the river here will have a major impact on wider flooding.

A floodplain or flood plain or flood-plain is an area of land adjacent to a stream or river which stretches from the banks of its channel to the base of the enclosing valley walls, and which experiences flooding during periods of high discharge.

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