A Floodplain is a wide, flat or nearly flat land over which the stream moves. Formation of the plain occurs when meandering streams migrate side to side widening the plain via erosion. Abnormally high rainfall or rapid snowmelt can produce flooding when stream waters overflow from its channel.

Where do floodplains occur?

A floodplain (or floodplain) is a generally flat area of land next to a river or stream. It stretches from the banks of the river to the outer edges of the valley.

Why do floodplains occur?

When rivers flood in the middle valley the cover an area of land known as the flood plain. When they flood velocity is slowed and deposition of any rocks being transported is encouraged. This deposition leaves a layer of sediment across the whole floodplain.