Which of the following is commonly associated with tributaries?

A. rapids when the tributary joins the main river

B. delivery of sediment to the main river

C. an increase in the discharge in the main river

D. all of these

Which of the following influences whether a flood occurs?

A. the height of levees

B. the amount of discharge

C. urbanization (replacing farms or natural land with buildings)

D. the width of the channel

E. all of these are influences

This figure shows four numbered river terraces, with 1 being the highest and 4 being the lowest. Which is the youngest terrace?

A. 1

B. 2

C. 3

D. 4

Which of the following accompanies urbanization (replacing farms and open areas with cities)?

A. the discharge pattern of streams in the area does not change

B. runoff occurs more quickly and produces a higher peak flow

C. runoff becomes more spread out in time, increasing the amount of flooding

D. runoff becomes more spread out in time, reducing the amount of flooding

E. none of these

Which of the following is unlikely to cause deposition of sediment along a stream?

A. a decrease in gradient

B. a decrease in water velocity

C. a drop in sea level

D. none of these

What could cause this stream to begin carving into the landscape?

A. if base level is lowered, such as a drop in sea level

B. if the land is uplifted relative to the sea

C. if a change in climate weathers and weakens the rocks

D. all of these

Which of the following is the main reason that a delta forms when a stream flows into a lake or sea?

A. the stream flows backward during high tide

B. ocean waves push the sediment up onto the beach

C. the velocity of the stream decreases

D. the stream began downcutting during the ice ages

E. none of these

Which of the following can influence a stream's profile?

A. a rise in sea level

B. a fall in sea level

C. tectonics

D. all of these

Which of the following is NOT a common site for deposition of sediment?

A. point bar

B. distributary system

C. levee

D. cutbank

E. floodplain

Multiple Choice

The graph below shows the rate at which water is pumped from a storage tank. Approximate the total gallons of water pumped from the tank in 24 hours. (A) 600 (B) 2400 (C) 3600 (D) 4200 (E) 4800

Which of the following typically decreases downstream in a river?

A. flow velocity

B. discharge

C. channel size

D. maximum sediment grain size

E. none of these

Which particles of sediment are most likely to be transported as suspended load?

A. small, low density particles

B. pebbles of average density

C. sand and gravel of relatively high density

D. dissolved ions in solution

E. all of these

What happens to the erosive power of a stream as velocity increases?

A. Erosion increases.

B. Erosion decreases.

C. Erosion is not related to velocity.

The size of clasts that a stream can carry is primarily controlled by:

A. the water temperature

B. the dissolved and suspended load of a stream

C. how close the stream is to the ocean

D. the velocity and turbulence of the current

E. whether it is a permanent or ephemeral stream