It landed on a flat plain covered in rounded pebbles and sent atmospheric data for 90 minutes.

The river drains an almost flat plain, and hence its lack of gradient makes it prone to flooding.

Although fighting on a flat plain seemed a reasonable strategy, the various vegetation that grew there at the time actually hindered mounted troop movements.

The village lies in a relatively flat plain.

It was formed when the area was a broad flat plain, forming a winding course typical of flatland rivers.