floodplain
flood plain

Sacramento County officials have been trying to buy some private land in the flood plain.

"Some of the homes in the flood plain should be moved," he said.

Large areas are kept free of buildings to provide a flood plain.

At the same time, the city bought 100 houses on the flood plain and turned the area into a park.

The majority of the flood plain was made into large parks.

The area is level, part of the creek's former flood plain.

The army following them seemed to cover the entire flood plain.

It has a population of 3100 people (2001) and was built on a flood plain.

What this has come to mean is the flood plain of the Mississippi.

It's an old flood plain, came into production thirty years ago.