alluvial plain

noun

1. a level or gently sloping surface formed of sediments laid down by streams, generally during flooding.

Word History and Origins

Origin of alluvial plain¹

First recorded in 1955–60

Example Sentences

Sediment from the Midwest, distributed through the alluvial plain by regular floods over millions of years, created Louisiana.

From Slate

The work is for the Mississippi Alluvial Plain Regional Water Availability project, to help water managers.

From Washington Times

The work is for the Mississippi Alluvial Plain Regional Water Availability project, to help water managers.

From Seattle Times

Bangladesh has far and away the highest population density of any sizable nation — around 3,000 people per square mile pack the alluvial plain that spans most of the country.

From Washington Post

Ferme Descoubet lies at the far western edge of the Gers, near where the dense hills of the Gascon heartland flatten out into the alluvial plain of the Adour River.

From New York Times