Rapids

Question 1

What are rapids and where are they found

Answer 1

Turbulent sections of the river, typically found in the upper course where the gradient is steeper

Question 2

Why do rapids form

Answer 2

Form as a result of the rivers vertical erosion rapidly in a localised section of the river bed

Question 3

What 2 processes are involved in rapid formation

Answer 3

Hydraulic action
Abrasion

Question 4

Where do rapids generally form

Answer 4

Where there is a sudden steepening of the river bed

Question 5

At what 4 places do rapids form

Answer 5

At steeper gradients
High turbulence
Different bands of rock
Fast velocity of river

Question 6

What is an eddy

Answer 6

A river feature that forms just downstream of an obstruction. An eddy can form on the side of the river or immediately after a boulder in the river. The water in an eddy is flowing in the opposite direction from the river and at times can be swirling or violent