Drainage Basin Features Flashcards

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1
Q

Source

A

The point at which a river starts

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2
Q

Watershed

A

Edge of the drainage basin (the boundary)

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3
Q

Confluence

A

The point at which tributaries join the main river

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4
Q

Tributaries

A

Smaller rivers that join the main channel/river

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5
Q

Mouth

A

Where the river enters the sea/lake

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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
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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
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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

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9
Q

Drainage basin

A

An are of land drained by a river

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