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Which of the following is the correct definition of stream gradient?


A) the water pressure at the bottom of the stream divided by the stream's width
B) the increase in discharge of a stream per unit drop in elevation
C) the distance traveled by water in a channel times a drop in elevation
D) the drop in elevation of a stream divided by the distance the water travels

E) B) and D)
F) B) and C)

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What generalizations can you make regarding the geology of a given area by examining stream drainage patterns on a topographic map? Give some examples. Also, are there limitations to such generalizations?

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Drainage patterns can vary from one terr...

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_________comprise the suspended loads of most rivers and streams.


A) Silt and clay- sized, detrital grains
B) Sand and gravel that move during floods
C) Dissolved salts
D) Dissolved ions and sand

E) A) and D)
F) None of the above

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_________is defined as the drop in elevation of the stream surface divided by the distance the water flows.

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_________are characteristics of downcutting streams and a youthful stage of valley evolution.


A) Meandering channels and natural levees
B) Wide floodplains
C) U- shaped, cross- valley profiles
D) Rapids and lots of whitewater

E) B) and C)
F) A) and C)

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Which one of the following statements is TRUE concerning natural levees?


A) They are erosional features left behind when meander cutoff occurs.
B) They are mostly fine sand and silt that build up during floods.
C) They are depositional features formed at times of low discharge.
D) They form the high, steep banks of a downcutting stream.

E) C) and D)
F) B) and C)

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Many larger rivers in the Colorado Plateau region meander in deep, narrow canyons and have no floodplains. How could this happen?


A) As sea level rose, the original, old age streams were rejuvenated.
B) Original, old age streams downcut as the land gradually rose.
C) Original, youthful streams continued to downcut as the land rose.
D) As sea level dropped, the original youthful streams matured into old- age streams.

E) C) and D)
F) A) and B)

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Which one of the following is TRUE concerning a major river system?


A) Channel bed roughness and turbulence generally increase downstream.
B) Upstream tributaries generally have lower gradients than the major river.
C) Discharge decreases below junctions with perennial tributaries.
D) Upstream tributaries generally have higher competencies than the major river.

E) C) and D)
F) A) and B)

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Which component of the hydrologic cycle describes the recharge of water to the soil and groundwater systems?

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_________describes the particle transport mode in streams intermediate between suspension and rolling along the bottom.


A) Siltation
B) Impact leaping
C) Saltation
D) Alluviation

E) B) and C)
F) None of the above

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A __________ stream pattern develops on lands underlain by tilted or folded, alternating hard and soft, sedimentary strata.


A) trellis
B) boreal
C) radial
D) dendritic

E) A) and C)
F) C) and D)

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_________generally constitutes the highest percentage of the annual sediment load moved by a stream.


A) Suspended load
B) Dissolved load
C) Saltation load
D) Bed load

E) All of the above
F) A) and B)

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A natural, meandering, river channel is modified into a more or less straight and smooth, canal- like channel. Which of the following statements is correct?


A) The natural channel had a lower gradient and higher friction than the straight channel.
B) The straight channel has a higher gradient and more friction than the natural channel.
C) The natural channel had a lower gradient and less friction than the modified channel.
D) All of the above statements are true.

E) B) and D)
F) B) and C)

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Which one of the following does not apply to stream turbulence and average velocity?


A) channel shape; bed roughness
B) laminar flow; dissolved load
C) stream gradient; channel roughness
D) discharge; stream gradient

E) A) and D)
F) None of the above

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At the head of a delta, the major channel splits into smaller channels that follow different paths to the sea. These smaller channels are known as_________ .


A) cotributaries
B) distributaries
C) endotributaries
D) exotributaries

E) B) and C)
F) None of the above

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A __________ drainage pattern is common in the Appalachian Valley and Ridge Province.


A) polygonal
B) trellis
C) dendritic
D) circular

E) A) and D)
F) A) and C)

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_________refers to sediments deposited from streams.

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The _________River has the largest discharge of any in the world.


A) Mississippi
B) Amazon
C) Nile
D) Congo

E) A) and B)
F) A) and C)

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_________is an abandoned, cutoff, meander loop.


A) A gatorback
B) A builtrail
C) An oxbow
D) A cowhock

E) A) and B)
F) A) and C)

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_________is the boundary line separating adjacent, stream drainage basins

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