Question 1

Which of the following is likely to occur if the gradient of a stream increases? (Assume that the discharge and sediment load remain unchanged.)

Accepted Answer

A)  The stream will begin to erode its channel and/or its banks.
B)  The amount of aggradation in the channel will increase.
C)  The stream will begin to deposit more of its load.
D)  The amount of bed load transport will decrease.E) A) and D)
F) A) and C)

Question 2

The downstream portion of a river

Accepted Answer

A)  features greater hydraulic action than do upstream portions.
B)  has lower discharges than do upstream portions.
C)  generally becomes more sluggish.
D)  generally is of higher velocity,although it is masked by reduced turbulence.E) A) and B)
F) All of the above

Question 3

The meaning of the terms ʺriverʺ and ʺstreamʺ sometimes overlap although,in general,a river is a large stream.

Accepted Answer

A) True 
 B)False

Question 4

This graph,showing the effects of urbanization on streamflow over time,is an example of a

Accepted Answer

A)  climograph.
B)  water budget.
C)  hydrological cycle.
D)  hydrograph.E) None of the above
F) B) and C)

Question 5

An oxbow lake is a former meander that has become isolated from the rest of the river.

Accepted Answer

A) True 
 B)False

Question 6

A basin in which water leaves via evapotranspiration or subsurface gravitational flow instead of reaching the ocean is said to have

Accepted Answer

A)  a disappearing stream.
B)  a closed system.
C)  sheetflow.
D)  internal drainage.E) A) and C)
F) B) and C)

Question 7

With no clear geometry and no true stream valley,this drainage pattern occurs in areas such as glaciated shield regions.

Accepted Answer

A)  Radial
B)  Deranged
C)  Dendritic
D)  ParallelE) B) and C)
F) A) and D)

Question 8

Bed load is moved by

Accepted Answer

A)  suspension.
B)  traction.
C)  saltation.
D)  saltation,traction,and suspension
E)  both saltation and traction,but not suspension.F) A) and B)
G) A) and E)

Question 9

A streamʹs volume of flow per unit of time is its

Accepted Answer

A)  velocity.
B)  flow rate.
C)  discharge.
D)  speed.E) None of the above
F) B) and D)

Question 10

The portion of each meandering curve subject to the slowest water velocity undergoes aggradation.This results in a(n)

Accepted Answer

A)  meander scar.
B)  point bar.
C)  cutback.
D)  oxbow.E) A) and D)
F) A) and C)

Question 11

This tree-like drainage pattern efficiently moves water and sediment through its system due to minimization of the total length of each branch.

Accepted Answer

A)  Deranged
B)  Dendritic
C)  Trellis
D)  RadialE) None of the above
F) A) and B)

Question 12

Cone-shaped deposits of sediment often found at mouth of canyons in arid and semiarid climates are called

Accepted Answer

A)  deltas.
B)  deposition.
C)  clastics.
D)  alluvial fans.E) B) and C)
F) All of the above

Question 13

Stream transport involves all of the following EXCEPT

Accepted Answer

A)  traction.
B)  bed load.
C)  sheet flow.
D)  saltation.E) B) and C)
F) A) and D)

Question 14

Define the following terms: drainage basis,drainage divide,interfluve,and valley.

Accepted Answer

drainage basin (watershed): an area of l...

Question 15

Discuss the concept of the graded stream.Do most streams approximate a graded stream? Why or why not?

Accepted Answer

A graded stream is one in which the chan...

Question 16

Which of the following tends to occur when an area experiences tectonic uplift in its headwater region?

Accepted Answer

A)  The amount of turbulence will decrease.
B)  The stream will begin to deposit more of its load.
C)  The channel will begin to erode downward at a faster rate.
D)  The stream will lose energy.E) B) and C)
F) A) and D)

Question 17

A graded stream is one that has achieved a dynamic equilibrium between degradation and aggradation.

Accepted Answer

A) True 
 B)False

Question 18

Faulted and jointed landscapes directs streams courses in patterns of right -angle turns forming this drainage pattern.

Accepted Answer

A)  Rectangular
B)  Radial
C)  Dendritic
D)  TrellisE) A) and B)
F) None of the above

Question 19

Which of the following is CORRECT of a floodplain?

Accepted Answer

A)  Floodplains are not associated with deposition.
B)  Despite the name,they are rarely subjected to flooding.
C)  It is an erosional feature located within a depositional feature.
D)  It is generally filled with layers of alluvium.E) A) and C)
F) All of the above

Question 20

The science of water and its global circulation,distribution,and properties is known as

Accepted Answer

A)  climatology.
B)  hydrology.
C)  geomorphology.
D)  lithology.E) C) and D)
F) B) and D)

Exam 12: Drainage Basins and Drainage Patterns

Define the following terms: drainage basis,drainage divide,interfluve,and valley.

Correct Answerverifieddrainage basin (watershed): an area of l...View AnswerShow Answer

The portion of each meandering curve subject to the slowest water velocity undergoes aggradation.This results in a(n)

Correct AnswerverifiedShow Answer

Cone-shaped deposits of sediment often found at mouth of canyons in arid and semiarid climates are called

Correct AnswerverifiedShow Answer

An oxbow lake is a former meander that has become isolated from the rest of the river.

Correct AnswerverifiedShow Answer

The science of water and its global circulation,distribution,and properties is known as

Correct AnswerverifiedShow Answer

Which of the following tends to occur when an area experiences tectonic uplift in its headwater region?

Correct AnswerverifiedShow Answer

The downstream portion of a river

Correct AnswerverifiedShow Answer

Discuss the concept of the graded stream.Do most streams approximate a graded stream? Why or why not?

Correct AnswerverifiedA graded stream is one in which the chan...View AnswerShow Answer

This tree-like drainage pattern efficiently moves water and sediment through its system due to minimization of the total length of each branch.

Correct AnswerverifiedShow Answer

A streamʹs volume of flow per unit of time is its

Correct AnswerverifiedShow Answer

Faulted and jointed landscapes directs streams courses in patterns of right -angle turns forming this drainage pattern.

Correct AnswerverifiedShow Answer

A basin in which water leaves via evapotranspiration or subsurface gravitational flow instead of reaching the ocean is said to have

Correct AnswerverifiedShow Answer

With no clear geometry and no true stream valley,this drainage pattern occurs in areas such as glaciated shield regions.

Correct AnswerverifiedShow Answer

This graph,showing the effects of urbanization on streamflow over time,is an example of a

Correct AnswerverifiedShow Answer

Stream transport involves all of the following EXCEPT

Correct AnswerverifiedShow Answer

Bed load is moved by

Correct AnswerverifiedShow Answer

A graded stream is one that has achieved a dynamic equilibrium between degradation and aggradation.

Correct AnswerverifiedShow Answer

Which of the following is likely to occur if the gradient of a stream increases? (Assume that the discharge and sediment load remain unchanged.)

Correct AnswerverifiedShow Answer

The meaning of the terms ʺriverʺ and ʺstreamʺ sometimes overlap although,in general,a river is a large stream.

Correct AnswerverifiedShow Answer

Which of the following is CORRECT of a floodplain?

Correct AnswerverifiedShow Answer

Correct Answer
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drainage basin (watershed): an area of l...
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A graded stream is one in which the chan...
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