Consider the following statements: 1. Corrasion is a mechanical erosion mechanism of the land, arising from the mechanical grinding of a load of traction from the river to the bed and banks of the river. 2. Hydraulic action is a mechanical process, in which the moving water current flows against the banks and bed of a river. 3. Attrition is fluvial erosion, in which wear and tear of the transported material erode the bed load by itself. Which of the statements given above is/ are correct?  

Consider the following statements: 1. Corrasion is a mechanical erosion mechanism of the land, arising from the mechanical grinding of a load of traction from the river to the bed and banks of the river. 2. Hydraulic action is a mechanical process, in which the moving water current flows against the banks and bed of a river. 3. Attrition is fluvial erosion, in which wear and tear of the transported material erode the bed load by itself. Which of the statements given above is/ are correct?   Correct Answer 1, 2 and 3

The correct answer is 1, 2 and 3 

Key Points

• The term Corrasion is used for the process of mechanical erosion of the Earth's surface.
  • ​Corrasion is a mechanical erosion, mechanism of the land, arising from the mechanical grinding of a load of traction from the river to the bed and banks of the river. Corrasion can occur in two separate ways: Lateral and Vertical Corrasion. Hence, Statement 1 is correct.
• Hydraulic action is the ability to move water to dislodge and transport rock particles.
  • ​The flowing water stream flows against ashore and a bed of a river and thus eliminates rock particles.
  • Hydraulic motion is mechanical operation. Any of the water springs over the banks of the river and flows through cracks and cracks. The water of the river gathers and transports loose parts from its banks and beds. Hence, Statement 2 is correct.
• Attrition is a form of coastal or river erosion.
  • Attrition is a kind of fluvial erosion in which the bed load is eroded by its own wear and tear by rolling and colliding the material. The rough rocks are divided into smaller stones and cailloux. Hence, Statement 3 is correct.

Additional Information

• Erosion is the action of surface processes (such as water flow or wind) that extract soil, rock, or dissolved material from the Earth's crust. 
• The most common use of the term erosion involves the general wearing down and moulding of all landforms on the surface of the Earth, including the weathering of rock in its original location, the transport of weathered material, and the erosion induced by wind and fluvial, marine and glacial processes.
• The landforms formed by degradation (erosion) or aggradation (deposition) of running water are referred to as fluvial landforms.
• It is possible to break the fluvial processes into three physical stages: erosion, transport, and deposition.