How do the Himalayan rivers perform erosional activities and form depositional features?

The course of Himalayan rivers is divided into three parts: upper, middle and lower course. They have long courses from their source to the sea. They perform an intensive erosional activity in their upper courses to carry huge loads of silt and sand.

As the Himalayan rivers are perennial and long courses, they receive water throughout the year. The regular flow of water in them performs erosional activities in the upper part, which has a steep slope. They accumulate a lot of silt and sand.

When they reach the plains, the slope of the land is much less, slowing down the river and making them deposit much of the silt they have accumulated. Thus, the Himalayan rivers form depositional features like oxbow lakes, riverine islands, meanders, etc.