Question

Given below is a photograph of Purwa Waterfall on the River Tamsa in Madhya Pradesh. Answer the following questions:

1. What stage is the River Tamsa at to cause the formation of this waterfall? Give reasons to support your answer.
2. What other landforms would a river make in this stage?
3. What landforms would the River Tamsa make in the next stage of its flow?
4. Besides being a tourist attraction, waterfalls are important sources of energy. Elucidate.

Answer 1

1. The River Tamsa is in its upper course (youthful stage), which is characterised by a steep gradient and fast-flowing water. In this stage, the river’s energy is primarily used for downward erosion, which leads to the formation of features like waterfalls and gorges. Waterfalls are typically formed where the river flows over hard, resistant rock, and the softer rock beneath it erodes more quickly, creating a vertical drop.
2. In the upper course, a river primarily forms V-shaped valleys, gorges, and waterfalls due to its erosional activity. Other common landforms include rapids, which are formed by the river flowing over uneven rock surfaces.
3. In the middle course (mature stage), the River Tamsa would experience a gentler gradient, leading to a slower flow. At this stage, the river would form meanders and oxbow lakes due to lateral erosion. Additionally, the river would widen, and floodplains would begin to form due to the deposition of materials carried by the river.
4. Waterfalls are important sources of energy because the falling water can be harnessed to generate hydroelectric power. The force of the water falling from a height can drive turbines, which convert the kinetic energy of the water into electricity. This renewable source of energy is crucial in many areas where other energy sources are limited or expensive. Additionally, waterfalls contribute to the aesthetic and ecological value of an area, supporting tourism and biodiversity.