Gradation in geography
Exogenetic forces are actively striving toward land leveling or gradation.
These forces seek to create a balance between erosion and deposition, which is a gradation position.
Sea waves, underground water, glaciers winds, and rivers are agents of gradation.
An elevated portion of the earth’s surface gets leveled by the process of erosion.
Depression filling is done by the deposition of degraded material carried by external agents of gradation.
Degradation and aggradation are two components of degradation.
When rocks are removed by scraping, scratching and cutting as a result of the process of erosion, thereby lowering the elevation of the land, it is called degradation.
Degradation, first of all, includes the work of weathering which is the movement of scarped and scratched material aided by the great force of gravity.
Increasing the rock-debris movement increases both its erosional and transportation ability.
Filling up of low-lying areas of depression by eroded material is called deposition.
Deposition occurs when gradation agents lose their force or their way is blocked.
New landforms are created by the deposition of eroded material.
Existing landforms also get modified due to the deposition of eroded material.