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GCSE Geography
river profiles P1
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luna
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Cards (23)
What is the path of a river as it flows downhill called?
Its
course
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Where does a river have a steep upper course?
Near the
source
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What type of slope does a river have in its middle course?
Gently sloping
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What type of slope does a river have in its lower course?
Almost flat
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What does the long profile of a river show?
How the
gradient
changes
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What do rivers form as they flow downhill?
Channels
and
valleys
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What processes do rivers use to shape the landscape?
Erosion
and
deposition
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What happens to eroded material carried by rivers?
It is
transported
and
deposited
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What determines the shape of the valley and channel along a river?
Dominant process of
erosion
or
deposition
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What does the cross profile of a river show?
A
cross-section
of the river
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What are the characteristics of a river's upper course?
Steep gradient
V-shaped valley
Steep sides
Narrow and shallow channel
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What are the characteristics of a river's middle course?
Medium
gradient
Gently sloping
Wide and deep
channel
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What are the characteristics of a river's lower course?
Gentle
gradient
Very
wide
, almost flat
Very wide and deep
channel
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What are the two types of erosion that affect rivers?
Vertical
and
lateral
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Can vertical and lateral erosion occur simultaneously?
Yes
, but
one
is
usually
dominant
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What does vertical erosion do to the river valley?
Deepens
the river
valley
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What shape does vertical erosion give to the river valley and channel?
V-shaped
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In which course of the river is vertical erosion most dominant?
Upper course
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What causes intense downwards erosion in the upper course?
High
turbulence
and
rough particles
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What is the effect of lateral erosion on the river valley?
It
widens
the
river valley
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What landform is associated with lateral erosion?
Meanders
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In which courses of the river is lateral erosion dominant?
Middle
and
lower
courses
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What action do the rough and angular particles have on the riverbed due to high turbulence?
Scraping
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