Ch 06.2: The Work of Streams - Floods and Drainage

Multiple Choice

One major cause of floods is...

• ...rapid spring snow melt.

• ...a decrease in stream discharge.

• ...light rain over a large area.

• ...increased capacity of stream channels.

Multiple Choice

One traditional flood control method has been to attempt to keep the stream’s flow within its channel by creating ___.

• meanders

• artificial cutoffs

• artificial levees

• flood control dams

Multiple Choice

Limiting development on floodplains is effective because it...

• ...allows floodplains to absorb floodwaters with little harm to structures.

• ...eliminates wide stream meanders.

• ...is more expensive to build structures on flat land.

• ...helps keep floodwaters within stream channels.

Multiple Choice

A drainage basin is...

• ...the channel of a stream.

• ...the land covered by floodwaters.

• ...the land area that contributes water to a stream.

• ...all streams that flow directly into an ocean.

Multiple Choice

What are the boundaries called that separate streams in adjacent drainage basins?

• mountain ranges

• divides

• valleys

• levees