Question 1

Natural levees are created

Accepted Answer

A) during floods. 
B) during normal flow conditions. 
C) during low flow conditions. 
D) as the river discharge decreases. 
E) when the carrying capacity of the stream is limited. 
A) during floods. 
B) during normal flow conditions. 
C) during low flow conditions. 
D) as the river discharge decreases. 
E) when the carrying capacity of the stream is limited.

Question 2

Which of the following is correct regarding floodplains?

Accepted Answer

A) they are formed by a flood in the area adjacent to the stream. 
B) natural levees on either side of a stream are formed during times when the stream is at flood stage and overflows the bank. 
C) they are generally high elevation areas. 
D) they are characterized by rapids and low waterfalls. 
E) they interrupt the stream profile 
A) they are formed by a flood in the area adjacent to the stream. 
B) natural levees on either side of a stream are formed during times when the stream is at flood stage and overflows the bank. 
C) they are generally high elevation areas. 
D) they are characterized by rapids and low waterfalls. 
E) they interrupt the stream profile

Question 3

The high ground that separates one valley from another is known as ________,and it directs surface water runoff known as ________ toward a stream.

Accepted Answer

A) the maximum contour elevation alluvial discharge 
B) the maximum contour elevation sheet flow 
C) an interfluve alluvial discharge 
D) an interfluve sheet flow 
E) the continental divide overland flow 
A) the maximum contour elevation alluvial discharge 
B) the maximum contour elevation sheet flow 
C) an interfluve alluvial discharge 
D) an interfluve sheet flow 
E) the continental divide overland flow

Question 4

Historically,zoning laws regarding floodplain use have been strictly adhered to,thereby diminishing the amount of damage done during floods.

Accepted Answer

A) True 
 B)False

Question 5

A yazoo tributary stream cannot join with the main river in an area because

Accepted Answer

A) the yazoo flows in a different valley. 
B) a small structural ridge separates the rivers. 
C) a natural levee on the main river prevents joining. 
D) a manmade flow control structure keeps the rivers separate. 
E) the velocity of flow in the yazoo tributary is too fast. 
A) the yazoo flows in a different valley. 
B) a small structural ridge separates the rivers. 
C) a natural levee on the main river prevents joining. 
D) a manmade flow control structure keeps the rivers separate. 
E) the velocity of flow in the yazoo tributary is too fast.

Question 6

The flood on the San Juan River in 1941 resulted in

Accepted Answer

A) erosion followed by redeposition. 
B) the river bed falling,then gradually accreting. 
C) deposition followed by scouring. 
D) changes in water velocity,but no change to the bed. 
E) changes in the discharge,but no change to the bed. 
A) erosion followed by redeposition. 
B) the river bed falling,then gradually accreting. 
C) deposition followed by scouring. 
D) changes in water velocity,but no change to the bed. 
E) changes in the discharge,but no change to the bed.

Question 7

Which of the following refers to the time frame in which equilibrium conditions exist?

Accepted Answer

A) geologic 
B) graded 
C) steady 
D) equi-time 
E) chaotic 
A) geologic 
B) graded 
C) steady 
D) equi-time 
E) chaotic

Question 8

Which of the following is a feature of a rejuvenated landscape?

Accepted Answer

A) entrenched meanders 
B) the Mississippi River delta 
C) a broad,nearly level floodplain 
D) point bars and cut banks 
E) pools and riffles 
A) entrenched meanders 
B) the Mississippi River delta 
C) a broad,nearly level floodplain 
D) point bars and cut banks 
E) pools and riffles

Question 9

Increased velocity and a rough channel can produce a

Accepted Answer

A) turbulent flow. 
B) laminar flow. 
C) maximum velocity. 
D) decreased capacity. 
E) extreme traction. 
A) turbulent flow. 
B) laminar flow. 
C) maximum velocity. 
D) decreased capacity. 
E) extreme traction.

Question 10

Which of the following stream channel forms is likely to develop when aggradation greatly exceeds erosion?

Accepted Answer

A) V-shaped valleys 
B) braided channels 
C) meandering channels 
D) straight,steep-walled channels 
E) deeply incised canyons 
A) V-shaped valleys 
B) braided channels 
C) meandering channels 
D) straight,steep-walled channels 
E) deeply incised canyons

Question 11

The construction of a dam across a river is likely to cause ________ upstream and ________ downstream.

Accepted Answer

A) erosion aggradation 
B) erosion erosion 
C) aggradation erosion 
D) aggradation aggradation 
A) erosion aggradation 
B) erosion erosion 
C) aggradation erosion 
D) aggradation aggradation

Question 12

If you wanted to build a structure on a river bank-especially one that flows through unconsolidated sediments-you should build the structure ________ to maximize its lifetime.

Accepted Answer

A) along the cutbank 
B) above the point bar 
C) in a delta 
D) next to a pool 
E) downstream from the riffle 
A) along the cutbank 
B) above the point bar 
C) in a delta 
D) next to a pool 
E) downstream from the riffle

Question 13

Braided streams,such as the Brahmaputra River,are found in areas

Accepted Answer

A) where the load is lower than the capacity. 
B) where the bed and suspended loads are low. 
C) that are subject to new sediment from glaciers or landslides. 
D) subject to sediment erosion from the river bed. 
E) with solid rock or resistant channel walls. 
A) where the load is lower than the capacity. 
B) where the bed and suspended loads are low. 
C) that are subject to new sediment from glaciers or landslides. 
D) subject to sediment erosion from the river bed. 
E) with solid rock or resistant channel walls.

Question 14

A low-velocity flow over a smooth stream bed produces a

Accepted Answer

A) turbulent flow. 
B) churning action. 
C) laminar flow of individual particles. 
D) extreme traction. 
E) stream erosion. 
A) turbulent flow. 
B) churning action. 
C) laminar flow of individual particles. 
D) extreme traction. 
E) stream erosion.

Question 15

The primary cause of terrace formation is

Accepted Answer

A) an increase in channel load. 
B) a decrease in flood frequency. 
C) an increase in a river's velocity. 
D) flow through loose sediment. 
E) a decrease in headwater elevation. 
A) an increase in channel load. 
B) a decrease in flood frequency. 
C) an increase in a river's velocity. 
D) flow through loose sediment. 
E) a decrease in headwater elevation.

Question 16

The meaning of the terms "river" and "stream" sometimes overlap although,in general,the term "river" is reserved for channels of water larger than a stream.

Accepted Answer

A) True 
 B)False

Question 17

Which of the following is correctly matched?

Accepted Answer

A) rills - large,permanent grooves in the land surface 
B) drainage divides - ephemeral ridges that develop in the drainage surface 
C) Mackenzie River Basin - contained in one province 
D) Danube River - an international stream 
E) major drainage basin - one river 
A) rills - large,permanent grooves in the land surface 
B) drainage divides - ephemeral ridges that develop in the drainage surface 
C) Mackenzie River Basin - contained in one province 
D) Danube River - an international stream 
E) major drainage basin - one river

Question 18

Steep slopes and some relief generally produce which drainage pattern?

Accepted Answer

A) dendritic 
B) deranged 
C) parallel 
D) annular 
E) trellis 
A) dendritic 
B) deranged 
C) parallel 
D) annular 
E) trellis

Question 19

The increased velocity downstream in the Mississippi River is masked by its reduced turbulence.

Accepted Answer

A) True 
 B)False

Question 20

Consider the equation Q = wdv.According to the equation,if Q (discharge)remains constant,but w and d decrease (as when a channel becomes more narrow and shallow),the velocity will

Accepted Answer

A) increase. 
B) decrease. 
C) remain constant. 
A) increase. 
B) decrease. 
C) remain constant.

Exam 14: River Systems and Landforms

Natural levees are created

Which of the following is correct regarding floodplains?

The high ground that separates one valley from another is known as ________,and it directs surface water runoff known as ________ toward a stream.

Historically,zoning laws regarding floodplain use have been strictly adhered to,thereby diminishing the amount of damage done during floods.

A yazoo tributary stream cannot join with the main river in an area because

The flood on the San Juan River in 1941 resulted in

Which of the following refers to the time frame in which equilibrium conditions exist?

Which of the following is a feature of a rejuvenated landscape?

Increased velocity and a rough channel can produce a

Which of the following stream channel forms is likely to develop when aggradation greatly exceeds erosion?

The construction of a dam across a river is likely to cause ________ upstream and ________ downstream.

If you wanted to build a structure on a river bank-especially one that flows through unconsolidated sediments-you should build the structure ________ to maximize its lifetime.

Braided streams,such as the Brahmaputra River,are found in areas

A low-velocity flow over a smooth stream bed produces a

The primary cause of terrace formation is

The meaning of the terms "river" and "stream" sometimes overlap although,in general,the term "river" is reserved for channels of water larger than a stream.

Which of the following is correctly matched?

Steep slopes and some relief generally produce which drainage pattern?

The increased velocity downstream in the Mississippi River is masked by its reduced turbulence.

Consider the equation Q = wdv.According to the equation,if Q (discharge)remains constant,but w and d decrease (as when a channel becomes more narrow and shallow),the velocity will

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The high ground that separates one valley from another is known as ,and it directs surface water runoff known as toward a stream.

The construction of a dam across a river is likely to cause upstream and downstream.