For Floodplain we have terms and definitions in 10 topics. The topics are Earth Science, Environment, Fish, Flood Insurance, Hunting, Landscape, Nature, Oceanography, Physical Geography and Water.

Floodplain (Earth Science)

The low relief lands bordering a stream or river, common to the mature and old age stages of stream development. Floodplains store excess water in times of high water, and excess sediments in times of low water. Beware of building your dream house on a floodplain - they tend to get rather wet at irregular intervals.

Floodplain (Environment)

The flat or nearly flat land along a river or stream or in a tidal area that is covered by water during a flood.

Floodplain (Fish)

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.

Floodplain (Flood Insurance)

Any land area susceptible to being inundated by flood waters from any source.

Floodplain (Hunting)

(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 (Landscape)

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.

Floodplain (Nature)

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.

Floodplain (Oceanography)

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.

Floodplain (Physical Geography)

Relatively flat area found alongside the stream channel that is prone to flooding and receives alluvium deposits from these inundation events.

Floodplain (Water)

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.

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