Water on the Land 0.0 / 5 ? GeographyWater and riversGCSEAQA Created by: yeahthatkatieCreated on: 01-10-13 13:52 A Rivers Course? The path of a river as it flows downhill 1 of 17 Properties in the upper course. Steep gradient, v-shaped valley, narrow/shallow channel 2 of 17 Properties in the middle course medium gradient, gently sloping valley sides, wider/deeper channel 3 of 17 Properties in the lower course gentle gradient, wide almost flat valley, wide/deep channel 4 of 17 Erosion Wearing the river bed away 5 of 17 Hydraulic Action The force of the water breaks rock particles away from the river channel 6 of 17 Abrasion Eroded rocks picked up by the river scrape and rub against the channel wearing it away. Most common type of erosion 7 of 17 Attrition Eroded rocks picked up by the river smash into each other and break into smaller fragments. 8 of 17 Solution River water dissolves some types of rock such as chalk and limestone. 9 of 17 Transportation The movement of eroded material downstream 10 of 17 Traction Large particle like boulders are pushed along the river bed by the force of the water 11 of 17 Saltation Pebble-sized particles are bounced along the river bed by the force of the water 12 of 17 Suspension Small particles such as slit and clay are carried by the rivers flow 13 of 17 Solution Soluble materials dissolve in the water and are carried along by the rivers flow 14 of 17 Discharge The volume of water in the river 15 of 17 Desposition When a river drops the material its transporting 16 of 17 Why rivers slow down and deposit material? The discharge falls, the river reaches its mouth 17 of 17
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