Rivers (erosion, transportation and deposition) 0.0 / 5 ? GeographyWater and riversGCSEOCR Created by: revisionCreated on: 09-03-17 17:27 What is vertical erosion? This deepens the river valley, making it V-shaped. It's dominant in the upper course of the river. 1 of 13 What is lateral erosion? This widens the river valley. It's dominant in the middle and lower courses. 2 of 13 Four processes of erosion- hydraulic action The force of the water breaks rock particles away from the river channel. 3 of 13 Four processes of erosion- abrasion Eroded rock is picked up by the river scrape and rubs against the channel, wearing it away. 4 of 13 Four processes of erosion- attrition Eroded rocks picked up by the river smash into each other and break into smaller fragments. Their edges also get rounded off as they rub together. 5 of 13 Four processes of erosion-solution River water disssolves some types of rock. 6 of 13 What is transportation? Transportation is the movement of eroded material. 7 of 13 Four processes of transportation-traction Large particles like boulders are pushed along the river bed by the force of the water. 8 of 13 Four processes of transportation-saltation Pebbled sized particles are bounced along the river bed by the force of the water. 9 of 13 Four processes of transportation- suspension Small particles like silt and clay are carried along by the water. 10 of 13 Four processes of transportation-solution Soluble materials dissove in the water and are carried along. 11 of 13 What is deposition? Deposition is when a river drops eroded material it's transporting it happens when a river slows down (looses velocity). 12 of 13 Why do rivers slow down and deposiit material? The volume of water in the river falls, the river reaches it's mouth, the water is shallower, the amount of eroded material in the water increases 13 of 13
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