Erosion, Transportation and Deposition

stjohntoby
Mind Map by , created almost 6 years ago

GCSE Geography (Rivers) Mind Map on Erosion, Transportation and Deposition, created by stjohntoby on 01/03/2014.

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stjohntoby
Created by stjohntoby almost 6 years ago
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Erosion, Transportation and Deposition
1 There are four processes of erosion

Annotations:

  • 1) Hydraulic - The forces of the water breaks rock particles away from the river channel. 2) Abrasion - Eroded rocks picked up by the river scrape and rub against the channel, wearing it away. Most erosion happens by abrasion. 3) Attrition - Eroded rocks picked up by the river smash in to each other and break into smaller fragments. 4) Solution - River water dissolves some types of rock e.g. chalk and limestone
2 Transportation is the movement of eroded material

Annotations:

  • 1) Traction - large particals like boulders are pushed along the river bed by the force of the water 2)Saltation - pebble-sized particales are bounced along the river bed by the force of the water 3) Suspension - small particales like silt and clay are carries along the water 4)Solution - soluble materials dissolve in the water and are carried along
3 Deposition is when a river drops eroded material

Annotations:

  • 1) Deposition is when a river drops the eroded material it's transporting. 2) It happens when a river slows down 3) There are a few reasons why rivers slow down and deposit material

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