Flashcards in Water On The Land: The River Valley Deck (16)
The path of a river as it flows downhill is called its
Where is the upper course closest to?
Source of the river
Where is the lower course closest to?
Mouth of the river
What do rivers form when they flow downhill?
The shape of the valley and channel changes due to what?
What does the long profile show?
The gradient changes over the course of the river
What does the cross profile show?
Shows you what a cross-section of the river looks like
Describe the upper course
Describe the middle course
Gently sloping valley sides
Describe the lower course?
Almost flat valley
What changes the cross profile of a river?
Vertical and Lateral erosion
What happens when Vertical erosion takes place?
Deepens the valley and channel
Making it V-Shaped
Where is vertical erosion most dominant?
Upper course of the river
What happens when Lateral erosion takes place?
It widens the valley and channel.
Where is lateral erosion most dominant?
Middle and lower courses.