|
deposition in bedrock channels occur along river banks and behind obstacles as |
water velocity decreases |
|
which of the following is not a common site for deposition of sediment |
cutbank |
|
which of the following features are generally not associated with mountain streams and rivers |
meanders |
|
which of the following is a condition favoring deposition of sediment |
a decrease in gradient of the stream |
|
narrow canyons are formed when |
downward incision is faster than widening of the canyon by erosion |
|
what is a drainage divide |
a ridge or strip of high ground separating one drainage basin from another |
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in which location would a geologist look for a stream confined to a single channel |
gentle plains |
|
a hydrograph shows the |
change in a rivers discharge over time |
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the feature formed when a river dumps its sediment near its mouth is called a |
delta |
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what is the mostly likely setting for this drainage pattern |
the area has folded or faulted rocks with different resistances to erosion |
|
where would be the relatively safest place to build a bridge across the stream in the accompanying figure? |
between points 5 and 6 |
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what type of stream is shown in this figure |
a stream that lacks point bars |
|
which of the following profiles does not match its position on the stream |
C |
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these are formed when a steep drainage enters a broad valley and the sediments and debris are deposited |
alluvial fans |
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which particles of sediment are most likely to be transported as suspected load |
small low density particles |
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which of the following sediment sizes is likely to be transported mostly on the bottom of the stream bed |
pebbles and cobbles |
|
smaller subsidiary channels that feed main channels of rivers |
tributaries |
|
when a river enters a lake or an ocean, it slows down, losing its capacity to carry sediments, forming |
deltas |
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which of the following is not a characteristic of a braided stream |
constant flow |
|
what is point bar |
a sandbar deposited along the inside of stream meanders due to lower velocity |
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what is the pattern of discharge shown by the hydrograph |
discharge quickly and gradually decreases |
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what can you conclude by comparing the left and right hydrographs, each of which depict the same amount of time |
the left diagram has a higher peak discharge |
|
the end of the river is the |
mouth |
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which of the following is unlikely to cause deposition of sediment along a stream |
a drop in sea level |
|
the profile of a stream is steeper at its |
headwaters |
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construction of a dam results in |
increased erosion by clear water released from the dam |
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which of the following is true about the base level of a stream |
most streams have lower gradient close to their base level |
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what is the term for small, shifting channels that carry water away from the main river channel and distribute it over the surface of the delta |
distributaries |
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a depositional feature that has been deposited on the inside of a curve because of lower velocity is known as |
point bar |
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which of the following features can be formed by deposition along a low gradient stream |
point bar |
|
when meander scars are filled with water, they are called |
oxbow lakes |
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what is the type of stream transportation by a series of short leaps or bounces off the bottom of the streambed? |
saltation |
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