English - English
Definition of floodplains in English English dictionary
- plural of floodplain
- floodplain
- An alluvial plain that experiences occasional or periodic flooding
- floodplain
- Relatively flat surfaces adjacent to active stream or river channels, formed by deposition of sediments during major floods The floodplain may be covered by water during floods: 100-year floodplain: That area that would be covered by water during the 100-year flood event Historic floodplain: An area larger than the 100-year floodplain Flow rate: The amount of water that moves through an area (usually pipe) in a given period of time
- floodplain
- (1) A flat tract of land bordering a river, mainly in its lower reaches, and consisting of alluvium deposited by the river It is formed by the sweeping of the meander belts downstream, thus widening the valley, the sides of which may become some kilometers apart In time of flood, when the river overflows its banks, sediment is deposited along the valley banks and plains (2) (SMP) Synonymous with 100-year floodplain The land area susceptible to being inundated by stream derived waters with a 1 percent chance of being equaled or exceeded in any given year The limits of this area are based on flood regulation ordinance maps or reasonable method that meets the objectives of the SMP (WAC 173-22-030(2))
- floodplain
- A low area of land adjacent to a stream or other water course which is subject to flooding and holds the overflow of water during a flood Often delineated on the basis of the 100 year storm event
- floodplain
- a low plain adjacent to a river that is formed chiefly of river sediment and is subject to flooding
- floodplain
- low lands adjoining the channel of a river, stream or watercourse, or ocean, lake or other body of water, which have been or may be inundated by flood water, and those other areas subject to flooding
- floodplain
- The alluvial plain formed by the deposition of sediment from the periodic flooding of a river
- floodplain
- Land built of sediment that is regularly covered with water as a result of the flooding of a adjacent stream
- floodplain
- Mostly level land along rivers and streams that may be submerged by floodwater A 100-year floodplain is an area which can be expected to flood once in every 100 years
- floodplain
- The flat land along a stream or river that floods on a regular basis, sometimes every year The soils are often quite rich with new nutrients brought in by floodwater Trees that grow in floodplains must be adapted to saturated soils that occur on the site Floodplains are part of the "riparian" habitat, which is the general zone along lakes and rivers [To return to previous page, click your browser's BACK button then scroll through the page to your last location]
- floodplain
- Land adjacent to a river which is subject to regular flooding
- floodplain
- 1 An area of flat land that may be covered by flood waters 2 A land area built up by deposits from a stream or river
- floodplain
- the low-relief (almost flat) area adjacent to a river that is submerged during a flood
- floodplain
- Any normally dry land area that is susceptible to being inundated by water from any natural source This area is usually lowland adjacent to a stream or lake
- floodplain
- Relatively flat area found alongside the stream channel that is prone to flooding and receives alluvium deposits from these inundation events
- floodplain
- The relatively flat area adjoining a river or lake that may be covered with water during a flood
- floodplain
- flat area adjacent to a stream in a river valley
- floodplain
- The broad area of land adjacent to a watercourse that is susceptible to flooding during very high water or a flat area on either side of a river which is under water during a flood and made up largely of soil deposited by floods
- floodplain
- A relatively flat or low land area adjoining a river, stream, pond, SWM structure, or water course subject to periodic, partial, or complete inundation; or an area subject to unusual and rapid accumulation or runoff of surface water as a result of an upstream dam failure
- floodplain
- The low lying lands adjacent to a river, lake, or ocean Floodplains are defined by the frequency of the flood large enough to cover them For example, a 100 year floodplain would be inundated by a 100 year flood, while a 500 year floodplain would be covered by a 500 year flood (back to top)
- floodplain
- The flat land that surrounds a stream and becomes submerged when the stream overflows its banks
- floodplain
- a level, low-lying area adjacent to streams that is periodically flooded by stream water It includes lands at the same elevation as areas with evidence of moving water, such as active or inactive flood channels, recent fluvial soils, sediment on the ground surface or in tree bark, rafted debris, and tree scarring
- floodplain
- The land adjacent to a body of water or water course that is subject to flooding
- floodplain
- A generally flat, low-lying area adjacent to a stream or river that is subjected to inundation during high flows The relative elevation of different floodplains determines their frequency of flooding, ranging from rare, severe storm events to flows experienced several times a year For example, a "100-year floodplain"would include the area of inundation that has a frequency of occurring, on average, once every 100 years
- floodplain
- (a) The surface or strip of relatively smooth land adjacent to a river channel, constructed by the present river in its existing regimen and covered with water when the river overflows its banks It is built of alluvium carried by the river during floods and deposited in the sluggish water beyond the influence of the swiftest current A river has one floodplain and may have one or more terraces representing abandoned floodplains (b) Any flat or nearly flat lowland that borders a stream and that may be covered by its waters at flood stages; the land described by the perimeter of the maximum probable flood
- floodplain
- An area adjacent to a stream or other water course which is subject to flooding (Rice (1991))