UPSC Exam > UPSC Videos > Geography (Prelims) by Valor Academy > Landforms formed by River - Indian Geography, UPSC IAS Exam Preparation
Landforms formed by River - Indian Geography, UPSC IAS Exam Preparation Video Lecture | Geography (Prelims) by Valor Academy
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FAQs on Landforms formed by River - Indian Geography, UPSC IAS Exam Preparation Video Lecture - Geography (Prelims) by Valor Academy
| 1. What are the landforms formed by rivers? |  |
Ans. Landforms formed by rivers include valleys, canyons, waterfalls, meanders, oxbow lakes, floodplains, and deltas. These landforms are created through erosion, transportation, and deposition of sediment by the flowing water of rivers.
| 2. How are valleys formed by rivers? | |
Ans. Valleys are formed by the erosive power of rivers. As a river flows over time, it erodes the land, cutting through the rocks and creating a V-shaped valley. The force of the flowing water and the sediment it carries gradually deepens and widens the valley.
| 3. What is a meander and how is it formed by a river? | |
Ans. A meander is a bend or curve in a river's course. It is formed by the lateral erosion of the river as it flows through soft rock or sediments. The river erodes the outer bank of a bend, while deposition occurs on the inner bank. Over time, this erosion and deposition process causes the river to form a curved meandering path.
| 4. How are oxbow lakes formed by rivers? | |
Ans. Oxbow lakes are formed when a meandering river cuts off a meander bend. As a river continues to erode and deposit sediment, the neck of the meander bend narrows. Eventually, during a flood or high flow, the river breaks through the narrow neck, creating a new straighter channel. The abandoned meander loop becomes isolated from the main river and forms an oxbow lake.
| 5. What is a delta and how is it formed by a river? | |
Ans. A delta is a landform formed at the mouth of a river where it meets a body of water, such as a lake, sea, or ocean. Deltas are formed when a river carries sediment, such as silt, sand, and clay, and deposits it at its mouth. Over time, the accumulated sediment builds up, creating a fan-shaped or triangular landform with various channels and distributaries.
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