Question

Explain the upper course of
river showing its features of rapids,
Cataract and waterfalls.​

Answer 1

Answer:

In the upper course of a river gradients are steep and river channels are narrow. ... When a river runs over alternating layers of hard and soft rock, rapids and waterfalls may form. Waterfalls commonly form where water rushes down steep hillsides in upland areas and quickly erodes the rocks.

Answer 2

Answer:

In the upper course of a river gradients are steep and river channels are narrow. ... When a river runs over alternating layers of hard and soft rock, rapids and waterfalls may form. Waterfalls commonly form where water rushes down steep hillsides in upland areas and quickly erodes the rocks.