- published: 23 Apr 2013
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A floodplain or flood plain is an area of land adjacent to a stream or river that stretches from the banks of its channel to the base of the enclosing valley walls and experiences flooding during periods of high discharge. It includes the floodway, which consists of the stream channel and adjacent areas that actively carry flood flows downstream, and the flood fringe, which are areas inundated by the flood, but which do not experience a strong current. In other words, a floodplain is an area near a river or a stream which floods when the water level reaches flood stage.
Flood plains are made by a meander eroding sideways as it travels downstream. When a river breaks its banks and floods, it leaves behind layers of alluvium (silt). These gradually build up to create the floor of the flood plain. Floodplains generally contain unconsolidated sediments, often extending below the bed of the stream. These are accumulations of sand, gravel, loam, silt, and/or clay, and are often important aquifers, the water drawn from them being pre-filtered compared to the water in the river.
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Healthy floodplains can help increase flood protection, recharge aquifers, and improve wildlife habitat. This animated feature illustrates how we can harness these rich ecosystems to benefit both people and wildlife.
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How do floodplains form? In this video we will learn how the floodplains form and how they prevent flood effects.
Rafting across a floodplain in the Canadian Rockies, a small-town teen must learn to let go of his childhood sweetheart when she reveals she's leaving for university. Director: Jeremy Lutter Writer: Daniel Hogg Composer: Terry Frewer DOP: Brendan Uegama Actors: Cameron Bright, Sarah Desjardins Author: D. W. Wilson Producers: Daniel Hogg, Jeremy Lutter, Broken Mirror Films Funders: bravoFACT, NSI Drama Prize
Floods like this one behind me are most common in the Spring thanks to all the snow melting and a whole lot of rain. Fortunately, most of the flood waters stay in this flood plain. That sounds like a good weather word of the week. I'm Storm Shield Meteorologist Jason Meyers. The flood plain is an area of land - usually next to a river or stream - prone to flooding. Floodplains typically flood when the nearby river or stream surpasses its flood stage. These are usually flat areas with with areas of higher elevation on both sides. They can range in size from a small valley to thousands of square miles. Flood plains near urban areas are usually transformed into parks or green space that won't be harmed by the rising waters, minimizing any potential flood damage. If you have a weather word...
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