Question 1

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

Accepted Answer

A)  zero
B)  1%
C)  2%
D)  50%

Question 2

All else being equal,water will flow faster in a stream that has a ________,which is typically found near the river's ________.

Accepted Answer

A)  steep gradient;source
B)  steep gradient;mouth
C)  gentle gradient;source
D)  gentle gradient;mouth

Question 3

Why are artificial levees only useful for some flooding events?

Accepted Answer

A)  Levees cannot be built larger than the surrounding floodplain.
B)  Flash floods occur too quickly for officials to close the levees.
C)  Levees are built in rural areas and will not help for flooding in the city.
D)  Large floods can create high pressures and undermine the levee.

Question 4

Dead zones occur due to a lack of ________ in the oceans.

Accepted Answer

A)  sediments
B)  phosphorus
C)  oxygen
D)  nitrogen

Question 5

The ________ is the average number of years between floods.

Accepted Answer

A)  discharge limit
B)  annual probability
C)  recurrence interval
D)  flood-hazard gap

Question 6

What will happen to a stream if the local base level is increased,for instance,by adding a dam to the river?

Accepted Answer

Creating a local stream level ...

Question 7

The total sediment load of a stream consists of all of the following EXCEPT the ________ load.

Accepted Answer

A)  turbulent
B)  suspended
C)  bed
D)  dissolved

Question 8

Urbanization causes an increase in the volume of water entering a stream due to the abundance of ________ surfaces in cities and towns.

Accepted Answer

A)  permeable
B)  impermeable
C)  pourous
D)  potable

Question 9

What is the effect on a river that runs through farmland?

Accepted Answer

A)  Sediment load will increase.
B)  Sediment load will decrease.
C)  The farm will dry out the river.
D)  The farm will add water to the river.

Question 10

Which of the following is FALSE? A 100-year flood ________.

Accepted Answer

A)  has a 1% chance of occurring in any given year
B)  is more destructive than a 50-year flood
C)  cannot occur in successive years
D)  is based on the average recurrence interval of past floods for a particular stream

Question 11

Within a meander,where is sediment most likely to be deposited?

Accepted Answer

A)  on the outer banks of the meander
B)  on the inner banks of the meander
C)  uniformly to either side of the meander
D)  directly in the middle of the meander

Question 12

________ increases the volume of water in and decreases the lag time of a flood.

Accepted Answer

A)  Establishment of natural levees
B)  Urbanization of an area
C)  Building a floodway
D)  Establishing farms

Question 13

What physical property of the underlying rock would lead to the formation of a cliff over which a waterfall may form?

Accepted Answer

A)  a high resistance to erosion
B)  high porosity
C)  large permeability
D)  very fine grain sizes

Question 14

Geological evidence suggests that many millions of years ago,the Amazon basin drained toward the west rather than the east.What caused this drainage reversal?

Accepted Answer

A)  a rise in the global sea level
B)  a lowering in the global sea level
C)  the rise of the Andes Mountains
D)  global climate change

Question 15

If a large airport,complete with paved runways,parking lots,and many new structures,is built next to a river,what might the effect be?

Accepted Answer

A)  a decrease in the fish population
B)  diminished nutrient supply for fish
C)  an increase in the likelihood of flooding
D)  Overuse of water will dry out the river.

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

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

Correct Answer
verified

What is the effect on a river that runs through farmland?

Correct Answer
verified

Geological evidence suggests that many millions of years ago,the Amazon basin drained toward the west rather than the east.What caused this drainage reversal?

Correct Answer
verified

Within a meander,where is sediment most likely to be deposited?

Correct Answer
verified

What physical property of the underlying rock would lead to the formation of a cliff over which a waterfall may form?

Correct Answer
verified

The ________ is the average number of years between floods.

Correct Answer
verified

________ increases the volume of water in and decreases the lag time of a flood.

Correct Answer
verified

What will happen to a stream if the local base level is increased,for instance,by adding a dam to the river?

Correct Answer
verified
Creating a local stream level ...
View Answer

The total sediment load of a stream consists of all of the following EXCEPT the ________ load.

Correct Answer
verified

Urbanization causes an increase in the volume of water entering a stream due to the abundance of ________ surfaces in cities and towns.

Correct Answer
verified

If a large airport,complete with paved runways,parking lots,and many new structures,is built next to a river,what might the effect be?

Correct Answer
verified

Which of the following is FALSE? A 100-year flood ________.

Correct Answer
verified

Why are artificial levees only useful for some flooding events?

Correct Answer
verified

Dead zones occur due to a lack of ________ in the oceans.

Correct Answer
verified

All else being equal,water will flow faster in a stream that has a ,which is typically found near the river's .

Correct Answer
verified

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

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

Correct AnswerverifiedShow Answer

What is the effect on a river that runs through farmland?

Correct AnswerverifiedShow Answer

Geological evidence suggests that many millions of years ago,the Amazon basin drained toward the west rather than the east.What caused this drainage reversal?

Correct AnswerverifiedShow Answer

Within a meander,where is sediment most likely to be deposited?

Correct AnswerverifiedShow Answer

What physical property of the underlying rock would lead to the formation of a cliff over which a waterfall may form?

Correct AnswerverifiedShow Answer

The ________ is the average number of years between floods.

Correct AnswerverifiedShow Answer

________ increases the volume of water in and decreases the lag time of a flood.

Correct AnswerverifiedShow Answer

What will happen to a stream if the local base level is increased,for instance,by adding a dam to the river?

Correct AnswerverifiedCreating a local stream level ...View AnswerShow Answer

The total sediment load of a stream consists of all of the following EXCEPT the ________ load.

Correct AnswerverifiedShow Answer

Urbanization causes an increase in the volume of water entering a stream due to the abundance of ________ surfaces in cities and towns.

Correct AnswerverifiedShow Answer

If a large airport,complete with paved runways,parking lots,and many new structures,is built next to a river,what might the effect be?

Correct AnswerverifiedShow Answer

Which of the following is FALSE? A 100-year flood ________.

Correct AnswerverifiedShow Answer

Why are artificial levees only useful for some flooding events?

Correct AnswerverifiedShow Answer

Dead zones occur due to a lack of ________ in the oceans.

Correct AnswerverifiedShow Answer

All else being equal,water will flow faster in a stream that has a ________,which is typically found near the river's ________.

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Creating a local stream level ...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

All else being equal,water will flow faster in a stream that has a ,which is typically found near the river's .

Correct Answer
verified