Drainage Density

Question 1

Drainage density formula

Answer 1

Drainage density = Total Length of streams in basin (km) / Area of drainage basin (km2)

Question 2

High density

Answer 2

High run off, less infiltration.

High rainfall
Soft rock
Little vegetation
Steep gradient

Question 3

Low density

Answer 3

Low run off, more infiltration

Low rainfall
Hard rock
Much vegetation
Gentle gradient

Question 4

Stream orders - Number of Streams

Answer 4

Higher stream order = Fewer streams in that order

Question 5

Stream orders - Gradient

Answer 5

Higher stream order = gentler gradient

Question 6

Stream orders - Stream length

Answer 6

Higher stream order = Longer streams

Question 7

Stream orders - Size of drainage basin

Answer 7

Higher stream order = Larger drainage basin