(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)).
Lands along inland rivers and streams that are subject to periodic flooding. Lowland and flat benches along water courses that flood, on the average, at least once every 100 years.
Relatively flat area found alongside the stream channel that is prone to flooding and receives alluvium deposits from these inundation events.
Flat valley floor next to a stream channel. For legal purposes, the term often applies to any low area that has the potential for flooding, including certain coastal areas.
A level and usually treeless area of land bordering a river that is subject to flooding but that is normally dry.
The land bordering a stream, built up of sediments from overflow of the stream, and subject to inundation when the stream is at flood stage.
The area of land next to rivers or the sea that is liable to flooding.
The level land along a river that is composed of river sediments laid down during periodic floods. In periods of heavy rain the floodplain may become covered in water as the river flows over its banks.
A level plain of stratified, unconsolidated sediment on either side of a stream, submerged during floods and built up by silt and sand carried out of the main channel.
The low relief area of a valley floor adjacent to a river that could be periodically inundated by flood waters.
the normally dry area, usually low land, adjacent to a stream, river, lake, watercourse, or bayou that is inundated on a periodic basis with flood waters
Land adjacent to a river or creek that is periodically inundated due to floods. The floodplain includes all land that is susceptible to inundation by the probable maximum flood (PMF) event.
The floodplain, which includes the riparian zone, is that part of the land adjacent to the river that is subject to flooding and consists of a mosaic of aquatic and terrestrial environments that are intricately linked with the river.
Bayous and creeks naturally come out of their banks and inundate the adjacent land from time to time. This area that is inundated is referred to as a floodplain. Back
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.
The flat land on either side of a stream that becomes covered with water during a flood.
low, relatively flat land adjoining inland and/or coastal waters, which is subject to periodic flooding.
Land areas outside the 100 year floodplain boundary. Areas of minimal flooding impact.
areas subject to inundation of water by the overflow of adjacent rivers
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.
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.
for a given flood event, that area of land adjoining a continuous watercourse that has been covered temporarily by water.
The area of land on either side of a creek or river which can be naturally covered with water when the waterway gets too full
low, flat ground, present on one or both sides of a stream channel
The flat land that surrounds a stream and becomes submerged when the stream overflows its banks.
Relatively flat or lowland area adjoining a river, stream, watercourse, lake, ocean or other body of standing water which has been or may be covered temporarily with floodwater during storms of specified frequency.
A strip of relatively flat and normally dry land alongside a stream, river, or lake that is covered by water during a flood.
_ The relatively flat area along the sides of a river which is naturally subject to flooding.
The flat area adjoining a river channel constructed by the river in the presence of climate, and overflowed at times of high river flow.
level land near a lake or river that may be submerged by floodwaters Understanding Watersheds
The land adjacent to a body of water or water course that is subject to flooding.
a flat area bordering a river that is likely to flood floodplain is considered a temporary wetland habitat.
Terrain bordering rivers tending to flood.
a low plain adjacent to a river that is formed chiefly of river sediment and is subject to flooding
a broad, flat plain adjacent to a stream channel he lowermost sections of most stream channels have a sinuous course and stream velocity varies within the channel relative to bends in the stream (see diagram below)
a land area adjacent to a river, stream, lake, estuary, or other water body that is subject to flooding
a low area of land surrounding water bodies, which holds the overflow of water during a flood
an area of flat terrain alongside a river or other body of water that is subject to flooding when the river or body of water overflows
a safety valve for the release of a raging creek's overflow
a very fertile area due to the rich alluvium deposited by floodwaters
a wide and flat plain
a wide, level area that borders a river and is covered by its water during a flood
Areas that are flooded periodically (usually annually) by the lateral overflow of rivers. In hydrology, the entire area that is flooded at a recurrence interval of 100 years.
the area of flat land along a river that may get flooded from time to time. Floodplains are mostly formed by the deposition of river sediments.
That pan of any stream valley which is inundated during floods, or has been.
Those lands abutting the floodway, the boundaries of which are indicated by floodwaters of a magnitude likely to occur once in one hundred years.
lowland and relatively flat alluvial areas adjoining inland and coastal waters, including flood-prone areas of offshore islands.
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.
A nearly flat, alluvial lowland bordering a stream, that is subject to frequent inundation by floods.
Valley land along the course of a stream which is subject to inundation during periods of high water that exceed the normal bank full elevation.
a relatively level, continuous area adjacent to a lake or stream channel which is submerged during times of flood; and natural depressions including wetlands which are periodically inundated by stormwater.
nearly flat land adjacent to a river that is naturally subject to periodic flooding.
The land areas adjacent to a river or stream that are flooded during storm events.
Level land built up by flowing stream deposition and periodically submerged by floodwater from that stream.
Land adjacent to a river that is covered by water when the river overflows.
An area officially determined to be at risk for flooding in the event of severe weather. In most cases, these areas lie along lakes and rivers. A 100-year floodplain would be affected by a 100-year flood.
that part of a stream valley that is covered with water when the river or stream overflows its banks; it is usually that part of the even valley floor that has been formed under the present regime.
The lowlands surrounding a watercourse (river or stream) or a standing body of water (lake), which are subject to flooding. ( plaine d'innondation)
low-lying alluvium immediately adjacent to a river or stream, inundated as soon as it overflows its banks.
Low lands adjoining the channel of a river, stream, watercourse, or other body of water, which have been or may be inundated by flood water, and those other areas subject to flooding.
A strip of relatively level land bordering a stream or river . It is built of sediment carried by the stream and dropped when the water has flooded the area. It is called a water floodplain if it is overflowed in times of high water, or a fossil floodplain if it is beyond the reach of the highest flood .
The flat area where a stream or river may overflow.
The floodplain is the area of flat ground alongside the river. When the river floods this area is covered in water. As the water flows away at the end of the flood the nutrients in the water are left behind, making the grounds of the floodplain very fertile.
region near river corridor impacted by flood events of the earth.
Flat lowland area that borders a stream and is covered by its water when the stream overflows. The floodplain is typically built up by alluvial sediments deposited by the stream.
Land that is actively (flooded beyond Bankfull once every 1-2 years), generally broad, gently sloped Valley floor, often bounded by a Terrace (abandoned Floodplain) or encroaching side slope
flat area beside a river prone to periodic flooding.
the portion of a river valley built of sediments deposited by the river and occasionally covered by river floodwaters
The surface or strip of relatively smooth land adjacent to a river channel, constructed by the present riven in its existing regimen and covered with water when the river overflows its banks. (Bates and Jackson 1980.)
Any land area susceptible to inundation by water from any source.
Areas adjacent to bodies of water that are most prone to flooding when the water overflows its banks.
A smooth plain covered by deposits of sand, gravel and rocks from floods. Sharp-edged rocks have only been carried by floodwaters a short distance while smooth, rounded rocks have traveled long distances.
Nearly level land situated on one of both sides of a stream channel that is constructed by the stream in (historically) recent climate and overflow during moderate flow events. Lowland bordering a river, subject to flooding when stream overflows.
Land which has been or may be covered by flood water during the regional flood (floods expected to occur once in every 100 years).
Part of alluvial plain that would be naturally Flooded in the absence of engineered Interventions.
The flat land beside a river or stream, which stores excess water when the river or stream floods.
Can be either a natural feature or statistically derived area adjacent to a stream or river where water from the stream or river overflows its banks at some frequency during extreme storm events.
A low relief, generally planar surface adjacent to larger stream channels that is inundated during floods or high discharge events; they are also underlain by alluvium that accumulated during floods
area along a river or stream that regularly floods. Much of the sediment is derived from the river itself (fluvial)
Land that gets covered with water as a result of the flooding of a nearby stream. Or level lowland bordering a stream or river onto which the flow spreads at flood stage.
The area adjacent to a stream that is on average inundated once a century.
A flat area beside a river that would flood if the river ran high.
the area on either side of the bankfull channel that carries the flow greater than the bankfull flow, that is, all storms greater than the one-to-two year storm. In natural areas the floodplain might be miles wide; in urban areas communities usually try to confine the floodplain to as narrow an area as possible.
a low area of land, surrounding streams or rivers, which holds the overflow of water during a flood.
area formed by fine sediments spreading out in the drainage basin on either side of the channel of a river as a result of the river's fluctuating water volume and velocity
Any land area susceptible to being inundated by floodwaters from any source.
The area of shorelands extending inland from the normal yearly maximum stormwater level to the highest expected stormwater level in a given period of time (e.g., 5, 50, 100 years).
The flat or nearly flat land on the floor of a stream valley or tidal area that is covered by water during floods.
A nearly level alluvial plain that borders a stream and is subject to flooding unless protected artificially.
The area adjoining a stream, tidal estuary or coast that is subject to regional flooding.
The area adjoining a watercourse that may be covered by floodwater during a flood. Storm runoff and flood events may cause alterations in the floodplain in certain areas.
Those land areas in and adjacent to streams and watercourses subject to periodic flooding; usually associated with environmental quality corridors. The 100 year floodplain drains 70 acres or more of land and has a one percent chance of flood occurrence in any given year.
Land area subject to inundation by flood waters from a river, water-course, lake, or coastal waters. Floodplains are delineated according to their estimated frequency of flooding.
A plain bordering a river, subject to flooding over various time intervals or cycles, with the areas closest to the river being flooded more often.
That portion of a river valley, adjacent to the channel, which is built of recently deposited sediments and is covered with water when the river overflows its banks at flood stages.
the low-relief (almost flat) area adjacent to a river that is submerged during a flood.
land next to a stream or river that is flooded during high-water flow.
flat area adjacent to a stream in a river valley.
Flat land beside a river that is inundated when the river overflows its banks during a flood.
Land adjacent to a watercourse that would be subject to repeated flooding under natural conditions (see Environment Agency's Policy and practice for the protection of flood plains for a fuller definition).
The land bordering or surrounding a river or stream that can be under water when the river or stream are at their high-water mark.
The flat surfaces along the courses of rivers, streams, and other bodies of water that are subject to overflow and flooding.
A level land area subject to periodic flooding from contiguous body of water. Floodplains are delineated by the expected frequency of flooding. For example, an annual floodplain is expected to flood once each year.
A land area adjacent to one or more rivers and streams and subject to recurring flooding. The boundary of this area is determined by the 100-year floodplain, as delineated by the Federal Emergency Management Agency. The term "100-year flood" is a statistical designation meaning there is a 1-in-100 (1%) chance that a flood this size will happen during any year.
The part of a river valley composed of unconsolidated river deposits that periodically floods. Sediment is deposited on the floodplain during floods and through the lateral migration of the river channel across the floodplain. The 100-year floodplain refers to that area of a river valley that is inundated during a large-magnitude flood occurring, on average, once every one hundred years.
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
An area of flat land bordering a river that is subject to flooding.
an area of flat land along a river
A low-lying area which can be covered in water following a given return period flood event
That portion of a river valley that is covered with water when the river overflows its banks. Flora Plant assemblage in a geographic area.
The area submerged by maximum river flow, usually during snowmelt or after major storms. Usually composed of alluvium deposited during such events.
The flat or nearly flat land along a river or stream or in a tidal area that is covered by water during a flood.
A floodplain, or flood plain, is flat or nearly flat land adjacent to a stream or river that experiences occasional or periodic flooding. It includes the floodway, which consists of the stream channel and adjacent areas that carry flood flows, and the flood fringe, which are areas covered by the flood, but which do not experience a strong current.