The lowlands adjoining the channel of a river, stream, or watercourse, or ocean, lake, or other body of standing water, which have been or may be inundated by flood water. The channel of a stream or watercourse is part of the floodplain.
All land adjacent to a watercourse over which water flows in times of flood or would flow but for the presence of flood defences where they exist. The limits of the flood plain are defined by the peak level of a 1 in 100 year return period flood or the highest known water level, whichever is greater.
Lands subject to periodic flooding. For the purposes of determining buildable land supply, FLOODPLAIN shall refer to all lands subject to the 100-year floodplain as identified by the Federal Emergency Management Agency (FEMA). (Data Source: Federal Emergency Management Agency; or Local Planning & Building Office)
The surface or strip of relatively smooth land adjacent to a stream channel produced by the stream's erosion and deposition actions; the area covered with water when the stream overflows its banks at times of high water; it is built of alluvium carried by the stream during floods and deposited in the sluggish water beyond the influence of the swiftest current.
means any land area susceptible to inundation by STORM WATER from any source. The FLOOD PLAIN is often defined as those normally dry lands adjoining or near the channel of a WATERCOURSE which have been, or may be, covered by stormwater runoff.
A land area next to a river, stream or water course which is likely to be flooded. The flood plain for the major streams in a county can be found on the County Flood Plain Map, which is available from the County Administrator or the County/City Engineer.
A relatively flat surface next to a stream. During floods, when the stream overflows its banks, water flows over the flood plain. Streams construct flood plains that accommodate their maximum flood capacity.
(a) The surface of 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 flood plain and may have one or more terraces representing abandoned flood plains. (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 probably flood. (c) The part of a lake-basic plain between the shoreline and the shore cliff, subject to submergence during a high stage of the lake.
the channel and the relatively flat area adjoining the channel of a natural stream or river which has been or may be covered by floodwater. Land immediately adjoining a stream which is inundated when the discharge exceeds the conveyance of the normal channel.
A strip of relatively smooth land bordering a stream, built of sediment carried by the stream and dropped in the slack water beyond the influence of the swiftest current. It is called a living flood plain if it is overflowed in times of highwater; but a fossil flood plain if it is beyond the reach of the highest flood.
The portion of a river valley that has historically been inundated by a river during floods. The Corps of Engineers encourages local governments to zone their flood plains against development and thereby avoid property damage and reduce obstruction to passage of flood waters.
the generally flat areas adjacent to a watercourse or the sea where water flows in time of flood or would flow but for the presence of flood defences (also called geographical flood plain). The limits of a flood plain are defined by the peak water level of an appropriate return period event. See also Functional Flood Plain.
a) Level lowland bordering a stream or river onto which the flow spreads at flood stage. ( FEMAT, IX-13) b) A lowland adjoining a watercourse. At a minimum, the area is subject to a 1% or greater chance of flooding in a given year. ( FS People's Glossary of Eco Mgmt Terms)
Any land area susceptible to being inundated by water from any source. Normally the regulatory flood plain is characterized by the 100-year meaning there is a 1% chance of flooding per year. The flood plain is often referred to as flood prone areas.