Exam 14: Running Water: the Geology of Streams and Floods

If a 50-year flood occurs on the Mississippi River in 2010,what is the probability that a flood of the same magnitude will occur in 2011?

All the water in rivers and streams arrives directly from rainfall runoff.

In uniform sediments or rock at the surface,a ____________ drainage network is expected.

A meander that is cut off to become completely isolated from the main channel and that dries up is a(n)____________.

Which has greater capacity?

In a region characterized by a parallel series of ridges and valleys,a ____________ drainage network is expected.

A thin strip of land separating abutted cut banks on opposite ends of a meander loop is a(n)____________.

The primary stream fed by tributaries within a drainage basin is termed a _________.

All else being equal,water will flow faster in a stream with ____________.

Ultimately,the base level of a stream valley can be no lower than ____________.

The slope of a stream bed measured at some point along its course is the ____________.

The inner edge of a meander,where sediment is deposited,is a(n)____________.

All else being equal,water will flow faster in a stream that has a ____________.

Meandering streams ____________.

As the velocity of flow decreases,____________.

Pirate streams ____________.

All else being equal,a deep,narrow stream will flow ____________ a shallow,broad stream.

Which river threatens to capture the flow of the Mississippi River?

A meander that is cut off to become completely isolated from the main channel but that retains water is a(n)____________.

A 100-year flood is more catastrophic than a 50-year flood.