You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "an area of land near a river that may be covered with water during a flood is called a?" whose answer is floodplain or flood plain.
Each document should contain about 30 words, and these documents should contain useful information.

Query: floodplain
Useful Output:

Doc 1: Floodplain Management. Floodplain management is a community-based effort to prevent or reduce the risk of flooding, resulting in a more
Doc 2: Change Your Flood Zone Designation · FEMA and the floodplain administrator work with local engineers and surveyors to collect the data to inform
Doc 3: A floodplain (or floodplain) is a generally flat area of land next to a river or stream. It stretches from the banks of the river to the
Doc 4: This study presents a global analysis of the sensitivity of inundated areas and population exposure to varying flood event magnitudes globally for 1.2 million
Doc 5: A floodplain map delineates the area that can be expected to flood, on average, once every 200 years. This is called the 200-year flood. A 200-