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- The pressure of water breaks away rock particles from the river bed and banks. The force of the water hits river banks and then pushes water into cracks. Air becomes compressed, pressure increases and the riverbank may, in time collapse.
www.alevelgeography.com/the-long-profile-changing-processes-types-of-erosion-transportation-and-deposition/
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Erosion is the process that wears away the river bed and banks. Erosion also breaks up the rocks that are carried by the river. There are four types of erosion: Hydraulic action - This is the...
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Abrasion, also known as corrasion, is when boulders and stones wear away the river banks and bed. Angular rocks that have entered the channel recently are valuable tools of abrasion because they are more angular. Abrasion is responsible for the river channel’s lateral and vertical erosion (see below).
Attrition is when sedimentparticles knock against the bed or each other and break, becoming more rounded and smaller as you move down the river.
Hydraulic action is when the force of fast-flowing water hits the bed and banks and forces water and air into cracks in the bedrock. The repeated changes in air pressure cause the river bed to weaken. Hydraulic action causes vertical (downward) erosion in the upper part of the river and lateral (sidewards) erosion to the banks in the lower stretch ...
Erosion is the process that wears away the river bed and banks. Erosion also breaks up the rocks that are carried by the river. There are four types of erosion: Hydraulic action - This is the...
Abrasion – when pebbles are picked up by the flowing water and smash against the river bank and bed, wearing it away. Attrition – when rocks that the river is carrying knock against each other.
In lowland areas, lateral erosion is dominant. Meanders increase in size. The fastest water flow (thalweg) is on the outside of the river bends, leading to erosion. The erosion undercuts the riverbank, forming a river cliff. The riverbank collapses and the edge of the meander moves further out
Apr 29, 2024 · Hydraulic action - this is the sheer force of fast-flowing water hits the river banks and bed and forces water into cracks. This compresses air in the cracks, and weakens the rock.
The bed and banks can be eroded making it wider, deeper and longer. Headward erosion makes a river longer. This erosion happens near its source. Surface run-off and throughflow cause erosion at the point where the water enters the valley head. Vertical erosion makes a river channel deeper.
