low-lying alluvial land near a river.

(1) Low land near a river, lake, stream, which is often flooded. (2) Land in a valley or dale.

the lowlands along streams and rivers, often on alluvial (river deposited) soil.

n., lowlands along streams and rivers, usually on alluvial floodplains that are periodically flooded.

Low lying land, near a water course or in a valley or similar geographic contour.

Lowlands along streams and rivers, usually an alluvial floodplains that is sometimes flooded. These areas are usually forested.

Land adjacent to a body of water that can also be part of a flood plain or land at the bottom of a valley or glen, which is usually fertile as top soil.

floodplain of a stream.