alluvial flat
alluvial plain

No living city had ever wandered onto the alluvial plain.

No city had ever come this close to the old alluvial plain.

Within an hour, they were driving across the old alluvial plain.

The southwestern part of the district is very low alluvial plain.

From the sea it was a short walk to the city across a mile of alluvial plain.

In the 1960s, there was significant agricultural development on its alluvial plains.

I looked down on the narrow alluvial plain below me.

A number of small alluvial plains are found in the corridor section.

The major part of this basin is an alluvial plain.

By now they were down on the alluvial plain of the Nile.