Rivers - Erosion, Transportation and Deposition 0.0 / 5 ? GeographyWater and riversGCSEAQA Created by: Madison PhillipsCreated on: 26-09-15 10:15 What Is Erosion? Erosion is the wearing away of the river bed and banks. 1 of 19 What Is Hydraulic Action? Hydraulic Action is the force of the water which is moving in the river. 2 of 19 What Is Abrasion? Abrasion is when the load scrapes the bed and banks. 3 of 19 What Is Attrition? Attrition is when pebbles or rocks smash into each other and break. 4 of 19 What Is Solution (Erosion)? Solution is the dissolving of certain types of rock (chalk and limestone) by rain water. 5 of 19 What is Vertical Erosion? This deepens the river valley (and channel), making it v-shaped. It is dominant in the upper course of the river. 6 of 19 What is Lateral Erosion? This widens the river valley (and channel). It is dominant in the middle and lower courses. 7 of 19 What are the 6 types of River Erosion? Hydraulic Action, Abrasion, Attrition, Solution, Vertical and Lateral Erosion. 8 of 19 What Is Transportation? Transportation is the movement of material. 9 of 19 What Is Traction? Traction is the rolling of material along the river bed. 10 of 19 What Is Saltation? Saltation is the bouncing of material along the river bed. 11 of 19 What Is Suspension? Suspension is when there are fine materials floating along in the river. 12 of 19 What Is Solution (Transportation)? Solution is the dissolving of certain types of rock (chalk and limestone) by rain water. 13 of 19 What are the 4 types of Transportation? Traction, Saltation, Suspension and Solution 14 of 19 What Is Deposition? Deposition is where the river leaves behind material that it has been carrying. 15 of 19 What size material is deposited first and why? It deposits the largest material first because it is the heaviest to carry. 16 of 19 What conditions cause the river to deposit its load? When there is a fall in the speed of the water or the amount of water is less. 17 of 19 Where might these conditions occur? When the gradient changes at the foot of a mountain or when a river enters a lake of the sea. 18 of 19 What Is Load? Load is the material carried by the River. 19 of 19
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