Headward erosion and Lateral erosion.

Question

Differentiate between:

Headward erosion and Lateral erosion.

Answer 1

Headward erosion	Lateral erosion
(i) Headward erosion is the backward erosion by river in the source region.	(i) Lateral erosion is the erosion that occurs on the sides of valleys of a river or glacier.
(ii) This is carried away by the river.	(ii) The valley slopes are eroded by tributary streams.
(iii) Headward erosion causes the river to move backward, because erosion takes place in the opposite direction of the follow of river.	(iii) Lateral erosion causes widening of valley, because lateral erosion occurs in the valley sides.