MG CH 13 (2)

What is a natural levee?

A ridge of flood deposits next to a river channel

Water falling in Illinois would ultimately end up where?

Gulf of Mexico

Which of the following is the primary step that allows water to enter the groundwater system?

Infiltration

How does the formation of a natural levee impact flooding?

Natural levees raise the height of the stream channel, reducing the amount of flooding that will occur on the floodplain.

Where do deposition and erosion of material occur along a meander?

Deposition occurs on the inside of the meander, whereas erosion occurs on the outside.

What is the dominant fluvial process in a clear, sediment-poor stream moving down a steep slope?

Downcutting

Stream terraces form as teh result of which of the following processes?

Downcutting following the rise of the landscape produces stream terraces.

What is suspended load?

The fin-grained particles that travel in the water column above the stream bed

Which of the following is likely to occur to an incised meander after it reaches equilibrium with its new base level?

The incised meander will cause only minor erosion of the canyon walls.

Which processes result in the widening of the floodplain of a meandering stream?

Undercutting and lateral erosion

What is a floodplain?

A flat surface next to a river channel

What is a meander scar?

A landscape feature formed after an oxbow lake dries up.

What is an oxbow lake?

A meander that has been cut off from the original stream channel

When the local gradient of a stream changes as it goes from a mountainous area to a large flat-lying area, which of the following features could form?

An alluvial fan

What are the three types of loads carried by streams?

Bed load, suspended load, dissolved load

Which of the following statements about the global water supply is true?

Decreased precipitation could impact water supply available for humans.

Which of the following features would you expect to find on the outside bank of a stream meander loop?

A cut bank

Complete this analogy: Bouncing is to sand as suspension is to ___.

Clay

In a delta, sedimentary layers deposited under circumstances that appear to violate the Principle of Original Horizontality are found in which of the following circumstances?

Foreset beds

Complete this analogy: Sliding is to gravel as dissolution is to ___.

Ions

What type of stream is associated with the formation of an oxbow lake?

Meandering stream

Which of the following statements accurately describe the erosional processes of meanders that are incising and meanders that are in equilibrium? Choose all that apply.

Meanders in equilibrium erode primarily in a side-to-side manner. Incising meanders erode primarily by downcutting.

How are oxbow lakes formed?

Oxbow lakes form when one meander erodes into another, cutting off water to part of the stream channel

How can pieces of rock in contact with a stream bed move?

Rolling, sliding, bouncing

Which of the following are part of the bed load?

Sand Gravel

While working in the field, you come upon a stream that flows in a very deep V-shaped valley. Regarding the history of this stream, which of the following statements is most likely true?

The stream is relatively young.

What causes meandering streams to downcut and become incised meanders?

Uplift of the land the stream is flowing on

Which of the following statements about drainage basins is FALSE?

Drainage basins only contain one river.