Drainage Basin Features Flashcards
1
Q
Source
A
The point at which a river starts
2
Q
Watershed
A
Edge of the drainage basin (the boundary)
3
Q
Confluence
A
The point at which tributaries join the main river
4
Q
Tributaries
A
Smaller rivers that join the main channel/river
5
Q
Mouth
A
Where the river enters the sea/lake
6
Q
Features of upper valley :
- > river?
- > load?
- > erosion & transport?
A
Steep sided V-shaped River = narrow & shallow & vertical erosion Load = large & angular HYDRAULIC ACTION, ABRASION, ATTRITION TRACTION, SALTATION
7
Q
Features of middle reaches :
- > river?
- > load?
- > erosion & transport?
A
Wider, flatter floor River = wider & deeper Load = smaller & less angular VERTICAL EROSION DECREASES, LATERAL EROSION INCREASES SUSPENSION
8
Q
Features of lower reaches :
- > river?
- > load?
- > deposition?
A
Very wide & flat
River = wide & deep & large sediment load
Load = small & rounded
Deposition = large load deposited
9
Q
Drainage basin
A
An are of land drained by a river
