Channel cross profiles
The channel cross profile = view of the river bed + banks - one side to the other - any one point on it course.
As a river flows from its source to its mouth= a number of typical changes take place in the channel morhology.
Upper course:
Channel = narrow and uneven- presence of deposted boulders.
Channel = narrow and uneven- presence of deposted boulders.
Where both banks = eroded = channels = broadly rectangular in shape.
Middle course:
Meanders
Meanders
Channel= asymmetrical- on the river bends
= mainly smooth + symmetrical - on the straight stretches.
Lower course:
River widens + deepens further
River widens + deepens further
Banks of deposition + eyots (islands of deposition) = can disrupt the shape of the channel cross-section= a braided channel.
Levees (embankments) = either side of the channel (can also be man-made)
No comments:
Post a Comment