Exam 12: Running Water Streams and Rivers

Since levees can protect many areas during floods,why are they controversial?

A fan-shaped deposit of alluvium that forms adjacent to highlands in arid or semiarid climates is called a(n)____________________.

The primary factor that determines whether water moves by turbulent or laminar flow is ____.

In each state in the U.S.,hydroelectric power accounts for 6.4% of the electricity generated.

The lower limit to which the stream can erode is its ____________________.

Streams do most of their erosion,transportation of sediment,and deposition of sediment during ____.

Briefly explain how a meandering stream can become incised in solid bedrock.

By percentage volume,most of the hydrologic cycle is limited to ocean-atmosphere transference.

What are the three types of beds characteristically exhibited by a prograding delta?

To predict floods,scientists

What is a 20-year flood?

____________________ flow is characteristic of almost all streams.

What is the difference between the velocity and the discharge of a stream?

What was the importance of the Nile River to ancient Egypt?

The average channel velocity increases downstream where the gradient is lower.

The gradient of streams tends to be ____________________ in their upper reaches and ____________________ in their lower reaches.

A stream erodes material from its banks and bed by ____.

What do the solid particles of a stream include?

When infiltration capacity is exceeded and water begins to move rapidly down slope,a continuous film of water known as ____________________ flow develops.This type of flow can cause ____________________.

The Mississippi River is an example of channel flow.