Question

What is the work done by river in the lower course??

Answer 1

Explanation:

In the lower course of the river the gradient is gentler than in the upper course. The river has more energy and the volume amount of water is high.

In the lower course there is more lateral (sideways) erosion. The channel is wide and deep. The river has less friction to overcome which means that the river can flow faster.

As the river erodes sideways, it swings from side to side, forming large bends called meanders.